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REPORT ON AFRIMETS SUPPLEMENTARY COMPARISON: PLATINUM RESISTANCE THERMOMETER AND DIGITAL THERMOMETER
CALIBRATIONS AGAINST ITS-90 OVER THE RANGE -50 °C TO 450 °C AFRIMETS.T-S1
Final report (16 August 2017) National Metrology Institute of South Africa
Private Bag X34, 0040 Lynnwood Ridge, South Africa
IPRT comparison (-50 °C to 450 °C)
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CONTENTS LIST
1. INTRODUCTION .................................................................................................................................. 3
2. PARTICIPANTS .................................................................................................................................... 3
3. ARTEFACTS ........................................................................................................................................ 4
4. MEASUREMENT PROCEDURE .......................................................................................................... 4
5. MEASUREMENT DATA ....................................................................................................................... 4
6. CONCLUSIONS ................................................................................................................................. 31
7. REFERENCES ................................................................................................................................... 31
APPENDIX 1: PROTOCOL FOR AFRIMETS.T-S1 ........................................................................................ 32
APPENDIX 2: INSTRUMENTATION ............................................................................................................... 51
APPENDIX 3: UNCERTAINTY BUDGETS ..................................................................................................... 56
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1. INTRODUCTION
The Comité Consulatif de Thermometrie (CCT) has organised several key comparisons to compare
realisations of the ITS-90 in different national metrology institutes. To keep the organisation, time scale and
data processing of such a comparison manageable, the number of participants in a CCT Key Comparison
(CCT KC) is limited to a few laboratories in each major economic region. Subsequent regional key
comparisons are linked to the applicable CCT Key Comparisons by link laboratories.
For the temperature range from -189.3442 °C (triple point of Ar) to 660.323 °C (freezing point of Al), a key
comparison, CCT-K3, was carried out from 1997 to 2001 by representative laboratories in North America,
Europe and Asia. Following CCT-K3, the Asia-Pacific Metrology Program Key Comparison 3 (APMP.T-K3)
was organised for national metrology institutes in the Asia/Pacific region. NMIA (Australia) and KRISS (South
Korea) provided the link between CCT-K3 and APMP.T-K3. APMP.T-K3, which took place from February
2000 to June 2003, covered the temperature range from –38.8344 °C (triple point of Hg) to 419.527 °C
(freezing point of Zn), using a standard platinum resistance thermometer (SPRT) as the artefact [1]. NMISA
participated in APMP.T-K3 in July 2000, achieving differences from the CCT-K3 Average Reference Values
(ARVs) of ≤ 0.5 mK, with U (k = 2) of 0.5 mK to 1.2 mK. This allows NMISA to link other comparisons of PRT
calibrations to CCT-K3, the relevant global comparison.
The first AFRIMETS Supplementary Comparison of industrial PRT (IPRT) calibration capabilities,
AFRIMETS.T-S1, was proposed in the April 2002 report of pilot comparison SADC.T-P1 (liquid-in-glass
thermometers from 0 °C to 50 °C) and was carried out from March 2008 to October 2010. NMISA was the
pilot. Although not part of the AFRIMETS region, NIMT (Thailand) was invited to participate, as a second
institute having participated in APMP.T-K3, to provide confidence in the Comparison Reference Values.
NIMT achieved differences from the CCT-K3 Average Reference Values (ARVs) of ≤ 1.3 mK, with U (k = 2)
of 0.5 mK to 2.7 mK, in APMP.T-K3.
2. PARTICIPANTS
Laboratory Contact person Measurement period
National Metrology Institute of South Africa (NMISA) Mr Hans Liedberg 6 – 10 March 2008
National Institute for Standards, Egypt (NIS) Dr Yasser
Abdelaziz 13 April – 2 May 2009
Metrology Directorate, Quality and Standards
Authority of Ethiopia (QSAE)
(now National Metrology Institute of Ethiopia, NMIE)
Ms Fitsum
Tesfaye 25 June – 1 July 2009
Kenya Bureau of Standards (KEBS) Mr Wilson
Egadwa 9 – 16 September 2009
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National Institute of Metrology, Thailand (NIMT) Mr Uthai Norranim 20 October – 6 November 2009
Uganda National Bureau of Standards (UNBS) Mr Simon
Rwashana 10 – 14 March 2010
Tanzania Bureau of Standards (TBS)
Mr Alphonce
Kagoma, Mr
Adam Ziagi
18 – 20 May 2010
Seychelles Bureau of Standards (SBS) Mr Gilbert
Madeleine 9 June 2010
Mauritius Standards Bureau (MSB) Mr Christian Ng
Ha Kwong 3 August – 3 September 2010
National Metrology Institute of South Africa (NMISA) Mr Hans Liedberg 29 – 31 October 2010
3. ARTEFACTS
High-temperature PRT (0 °C to 450 °C):
Manufacturer: Atexis
Model: TLH600
Serial number: 612
Dimensions: 500 mm long, 5 mm diameter
Low-temperature PRT (-50 °C to 200 °C):
Manufacturer: Burns Engineering
Model: 12001
Serial number: 794332
Dimensions: 356 mm long, 6.35 mm diameter
Digital readout:
Manufacturer: ASL
Model: F250
Serial number: 1228 019 081
4. MEASUREMENT PROCEDURE
The PRTs were annealed by each participant before calibration (one hour at 450 °C for the high-temperature
PRT, two hours at 200 °C for the low-temperature PRT), to place them in a reproducible hysteresis state.
They were measured on local resistance measuring instruments (where available) and on the travelling
readout.
5. MEASUREMENT DATA
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Figures 1 and 2 show the variation in the resistances at the water triple point, as measured by NMISA. They
have been converted to temperature units, to facilitate visual interpretation. Table 1 shows the plotted
values, expressed in resistance units. For determination of Comparison Reference Values (RV), the value of
Rlocal (0.01 °C) on the date of measurement is determined by linear interpolation between the values
measured by NMISA. The difference between Rlocal, NMISA (0.01 °C) values before and after the date of
measurement is included as a component (with coverage factor k = 2√3) in U(RV).
The measurements of R (0.01 °C) on the travelling readout are approximately 4.8 mΩ lower than those on
the local resistance measuring instrument (see Table 1), i.e., Rtravelling(0.01 °C) / Rlocal(0.01 °C) = 0.999 952.
This factor is used to determine Rtravelling (0.01 °C) on the date of measurement, from the value of Rlocal
(0.01 °C), determined as described above.
Values of R (t) reported by participants are converted to resistance ratios W (t) using the above-mentioned
values of R (0.01 °C).
Drift of R(0.01°C)
-0.005
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
1-Jan-09 2-Apr-09 2-Jul-09 1-Oct-09 1-Jan-10 2-Apr-10 2-Jul-10 2-Oct-10
Date
dR
(°C
)
612 (local readout) 612 (travelling readout)
Figure 1. Variation of R (0.01 °C) during the comparison: high-temperature PRT.
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Drift of R(0.01°C)
0
0.005
0.01
0.015
1-Jan-09 2-Apr-09 2-Jul-09 1-Oct-09 1-Jan-10 2-Apr-10 2-Jul-10 2-Oct-10
Date
dR
(°C
)
794332 (local readout) 794332 (travelling readout)
Figure 2. Variation of R (0.01 °C) during the comparison: low-temperature PRT.
Table 1. Variation of R (0.01 °C) during the comparison.
High-T PRT 612 (local) (travelling) Low-T PRT 794332 (local) (travelling)
Date R(0.01°C) Date R(0.01°C) Date R(0.01°C) Date R(0.01°C)
(ohm) (ohm) (ohm) (ohm)
6-Mar-08 100.00241 13-Oct-08 99.998 6-Mar-08 100.05066 13-Oct-08 100.045
10-Mar-08 100.00229 19-Oct-08 99.997 10-Mar-08 100.05046 19-Oct-08 100.045
22-Jan-09 100.00233 10-Mar-08 100.05032 20-Oct-08 100.045
26-Jan-09 100.00221 3-Oct-09 100.05172 3-Oct-09 100.046
3-Oct-09 100.00520 3-Oct-09 100.000 8-Feb-10 100.05211 8-Feb-10 100.048
8-Feb-10 100.00909 8-Feb-10 100.005 28-May-10 100.05334
28-May-10 100.01321 29-Oct-10 100.05478
29-Oct-10 100.01526 29-Oct-10 100.05442
29-Oct-10 100.01474 30-Oct-10 100.05450
30-Oct-10 100.01378 31-Oct-10 100.05441
Figures 3 and 4 show the differences between the calibrations of the PRTs performed by NMISA. The
means of the deviation functions fitted to the March 2008 and October 2010 data (pink lines in Figures 3 and
4) are used to determine the Reference Value (RV) temperatures from values of resistance ratio W (t). The
difference between the mean deviation function and that fitted to the March 2008 data is included as a
component (with coverage factor k = 2√3) in U (RV).
The mean deviation function coefficients are shown in Table 2.
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Table 2. ITS-90 deviation function coefficients used to determine RV from W (t).
High-T PRT 612 Low-T PRT 794332
Temp range (°C): -50 0.01
a4= -3.7880E-04
b4= 4.6541E-05
Temp range (°C): 0.01 450 Temp range (°C): 0.01 200
a8= -1.7609E-02 a8= -4.0936E-04
b8= -1.3782E-04 b8= -5.9463E-05
Drift of W(t)
-0.01
-0.005
0
0.005
0.01
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
dW
(°C
)
10-Mar-08 (on F18) 19-Oct-08 (on F250 ch A) 31-Oct-10 (on F18) Mean of Mar-08 & Oct-10
Figure 3. Variation of W (t), as measured by NMISA: high-temperature PRT.
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Drift of W(t)
-0.01
-0.005
0
0.005
-50 0 50 100 150 200
Temperature (°C)
dW
(°C
)
10-Mar-08 (on F18) 20-Oct-08 (on F250 ch A) 31-Oct-10 (on F18) Mean of Mar-08 & Oct-10
Figure 4. Variation of W (t), as measured by NMISA: low-temperature PRT.
Channel A of the travelling readout was calibrated for linearity at NMISA, using an RBC100 resistor network,
on 21 April 2008, 8 February 2010 and 27 January 2011. U (k = 2) = 1.4 mΩ was obtained in all three
calibrations. This uncertainty was added to U (RVlocal) to obtain U (RVtravelling). A typical set of results is shown
in Figure 5.
ASL F250 S/N 1228 019 081 ch. A: 2011-01-27
-0.001,6
0.000,0
0.001,6
0 20 40 60 80 100 120 140
Bridge reading
Fit
ted
va
lue
- r
ea
din
g
Ch. A (fitted) Linear (Ch. A (fitted))
Figure 5. Calibration of travelling readout for linearity.
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In Tables 3 - 12 and Figures 6 - 25, the participants’ results are compared to the Reference Values,
determined as described above. NMISA’s results are also compared to RV, to control against errors in
calculation. Values of U (RSS) = √ [ULV2 + URV
2] shown in the figures are those calculated for the local
readout (usually smaller than those for the travelling readout). The normalised error En = (LV – RV) / √ [ULV2
+ URV2] is used to evaluate equivalence: -1 < En <1 is considered a non-discrepant result.
Table 3. NMISA initial results.
Participant: NMISA Date: 10-Mar-08 10-Mar-08 100.0023 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0023 22-Jan-09 100.0023 0.0001
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.010 100.0024 0.0002 0.010 0.002 0.000 -0.15
50.109 119.4899 0.004 50.111 0.004 -0.002 -0.45
125.033 148.0780 0.004 125.036 0.005 -0.003 -0.53
200.004 176.0263 0.004 200.007 0.006 -0.003 -0.46
249.774 194.2215 0.005 249.778 0.006 -0.004 -0.44
351.727 230.6087 0.007 351.729 0.007 -0.002 -0.16
447.924 263.8536 0.008 447.922 0.008 0.002 0.15
0.010 100.0023 0.0002 0.010 0.002 0.000 0.00
612 (trav. readout) Rtp (Ω): 99.9976
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.010 99.9980 0.0002 0.011 0.004 -0.001 -0.22
70.038 127.1510 0.004 70.036 0.006 0.002 0.34
140.077 153.7298 0.004 140.075 0.006 0.001 0.19
200.178 176.0815 0.004 200.179 0.007 0.000 -0.05
251.389 194.7955 0.005 251.386 0.007 0.003 0.35
333.035 224.0165 0.007 333.040 0.008 -0.004 -0.40
448.129 263.9127 0.008 448.132 0.009 -0.003 -0.24
0.010 99.9970 0.0002 0.008 0.004 0.002 0.41
Participant: NMISA Date: 10-Mar-2008 10-Mar-08 100.0503 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0503 3-Oct-09 100.0517 0.0021
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.000 0.0000 0.0002
50.111 119.8830 0.004 50.112 0.004 -0.001 -0.17
125.027 148.9752 0.004 125.029 0.005 -0.002 -0.34
200.005 177.4241 0.004 200.010 0.006 -0.005 -0.75
0.010 100.0506 0.0002 0.011 0.003 -0.001 -0.20
-48.024 80.7469 0.001 -48.024 0.003 0.000 0.06
-19.476 92.2540 0.001 -19.477 0.004 0.000 0.02
-9.774 96.1417 0.001 -9.774 0.004 0.000 0.00
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0.010 100.0504 0.0002 0.010 0.003 0.000 -0.06
794332 (trav. readout) Rtp (Ω): 100.0454
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.010 100.0450 0.0002 0.009 0.005 0.001 0.22
70.047 127.6820 0.004 70.043 0.006 0.004 0.59
140.076 154.7303 0.004 140.077 0.006 -0.001 -0.11
200.165 177.4720 0.004 200.161 0.007 0.004 0.55
0.010 100.0450 0.0002 0.009 0.005 0.001 0.22
-50.566 79.7135 0.001 -50.566 0.005 0.000 -0.05
-20.195 91.9595 0.001 -20.199 0.005 0.004 0.79
-10.591 95.8085 0.001 -10.595 0.005 0.004 0.82
0.010 100.0450 0.0002 0.009 0.005 0.001 0.22
AFRIMETS.T-S1: high-temperature PRT
-0.04
0
0.04
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) NMISA 612 (local readout) NMISA 612 (trav. readout)
Figure 6. NMISA initial: high-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
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AFRIMETS.T-S1: low-temperature PRT
-0.04
0
0.04
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) NMISA 794332 (local readout) NMISA 794332 (trav. readout)
Figure 7. NMISA initial: low-temperature PRT.
Table 4. NIS results.
Participant: NIS Date: 23-Apr-2009 26-Jan-09 100.0022 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0032 3-Oct-09 100.0052 0.0044
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.006 99.9998 0.005 0.001 0.005 -0.007 -0.93
69.974 127.1408 0.017 69.991 0.007 -0.017 -0.94
140.236 153.8074 0.024 140.259 0.009 -0.024 -0.93
200.243 176.2353 0.055 200.569 0.010 -0.326 -5.86
249.905 194.3040 0.026 250.000 0.011 -0.095 -3.43
329.795 222.9131 0.056 329.882 0.012 -0.087 -1.51
419.614 254.1914 0.042 419.639 0.014 -0.025 -0.57
449.545 264.4713 0.258 449.732 0.014 -0.186 -0.72
-0.010 99.9937 0.005 -0.014 0.005 0.004 0.59
612 (trav. readout) Rtp (Ω): 99.9986
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.007 99.9840 0.005 -0.027 0.006 0.020 2.54
69.896 127.1010 0.017 69.903 0.008 -0.007 -0.38
140.238 153.8230 0.024 140.320 0.009 -0.082 -3.22
200.246 176.1800 0.055 200.442 0.010 -0.195 -3.50
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249.905 194.2800 0.026 249.959 0.011 -0.054 -1.91
329.797 223.0500 0.056 330.298 0.013 -0.501 -8.73
419.607 254.3600 0.042 420.165 0.014 -0.558 -12.63
449.547 264.6600 0.258 450.323 0.015 -0.776 -3.00
-0.008 99.9940 0.005 -0.002 0.006 -0.007 -0.83
Participant: NIS Date: 23-Apr-2009 10-Mar-08 100.0503 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0513 3-Oct-09 100.0517 0.0021
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.006 100.0354 0.010 -0.030 0.003 0.024 2.26
69.974 127.6325 0.033 69.897 0.005 0.077 2.30
140.236 154.7901 0.009 140.210 0.005 0.026 2.53
200.243 177.5052 0.020 200.221 0.006 0.022 1.03
-0.010 100.0399 0.010 -0.019 0.003 0.009 0.79
-49.898 79.9851 0.010 -49.907 0.003 0.009 0.88
-19.923 92.0717 0.010 -19.933 0.004 0.010 0.99
-9.927 96.0774 0.009 -9.937 0.004 0.010 1.03
-0.010 100.0409 0.010 -0.016 0.003 0.006 0.59
794332 (trav. readout) Rtp (Ω): 100.0464
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.007 100.0340 0.010 -0.021 0.005 0.014 1.26
69.896 127.5640 0.033 69.737 0.006 0.158 4.69
140.238 154.7840 0.009 140.214 0.006 0.024 2.22
200.246 177.4950 0.020 200.218 0.007 0.029 1.34
-0.008 100.0410 0.010 -0.004 0.005 -0.005 -0.43
-49.898 79.9860 0.010 -49.895 0.005 -0.003 -0.26
-19.920 92.0730 0.010 -19.919 0.005 -0.001 -0.13
-9.938 96.0740 0.009 -9.934 0.005 -0.005 -0.43
-0.002 100.0410 0.010 -0.004 0.005 0.002 0.18
IPRT comparison (-50 °C to 450 °C)
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AFRIMETS.T-S1: high-temperature PRT
-0.8
-0.6
-0.4
-0.2
0
0.2
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) NIS 612 (local readout) NIS 612 (trav. readout)
Figure 8. NIS: high-temperature PRT.
AFRIMETS.T-S1: low-temperature PRT
-0.04
0
0.04
0.08
0.12
0.16
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) NIS 794332 (local readout) NIS 794332 (trav. readout)
Figure 9. NIS: low-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
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Table 5. QSAE (NMIE) results.
Participant: QSAE Date: 28-Jun-2009 26-Jan-09 100.0022 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0040 3-Oct-09 100.0052 0.0044
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.000 100.0004 0.026 0.001 0.005 0.000 -0.01
70.182 127.2163 0.038 70.185 0.007 -0.003 -0.08
140.103 153.7495 0.232 140.102 0.009 0.002 0.01
199.819 175.9782 0.232 199.868 0.010 -0.049 -0.21
248.656 193.8523 0.693 248.751 0.011 -0.095 -0.14
328.943 222.5927 0.693 328.971 0.012 -0.028 -0.04
419.258 254.0763 0.694 419.298 0.014 -0.040 -0.06
448.986 264.2323 0.702 449.022 0.014 -0.037 -0.05
-0.001 100.0006 0.026 0.001 0.005 -0.002 -0.08
612 (trav. readout) Rtp (Ω): 99.9994
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.000 100.0000 0.026 0.012 0.006 -0.011 -0.41
70.185 127.2100 0.038 70.184 0.008 0.001 0.03
140.103 153.7500 0.232 140.122 0.009 -0.019 -0.08
199.824 175.9740 0.232 199.879 0.010 -0.055 -0.24
248.595 193.7980 0.693 248.626 0.011 -0.031 -0.05
329.038 222.6070 0.693 329.041 0.013 -0.002 0.00
419.264 254.0660 0.694 419.302 0.014 -0.038 -0.05
449.271 264.3080 0.702 449.281 0.015 -0.010 -0.01
0.000 100.0000 0.026 0.012 0.006 -0.012 -0.44
Participant: QSAE Date: 28-Jun-2009 10-Mar-08 100.0503 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0515 3-Oct-09 100.0517 0.0021
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.000 100.0473 0.026 0.000 0.003 0.001 0.03
70.183 127.7432 0.033 70.180 0.005 0.003 0.11
140.105 154.7523 0.232 140.110 0.005 -0.005 -0.02
199.834 177.3682 0.232 199.855 0.006 -0.022 -0.09
0.001 100.0475 0.026 0.000 0.003 0.001 0.03
-50.059 79.9240 0.037 -50.058 0.003 -0.001 -0.03
-19.931 92.0727 0.037 -19.931 0.004 0.001 0.01
-10.030 96.0398 0.028 -10.031 0.004 0.002 0.06
0.000 100.0478 0.026 0.001 0.003 0.000 -0.01
794332 (trav. readout) Rtp (Ω): 100.0466
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
IPRT comparison (-50 °C to 450 °C)
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0.000 100.0460 0.026 0.009 0.005 -0.008 -0.31
70.181 127.7400 0.033 70.188 0.006 -0.007 -0.20
140.100 154.7410 0.232 140.100 0.006 0.000 0.00
199.830 177.3600 0.232 199.857 0.007 -0.027 -0.12
0.001 100.0460 0.026 0.009 0.005 -0.008 -0.29
-50.065 79.9200 0.037 -50.058 0.005 -0.006 -0.17
-19.948 92.0600 0.037 -19.951 0.005 0.003 0.09
-10.027 96.0400 0.028 -10.019 0.005 -0.008 -0.27
0.000 100.0430 0.026 0.001 0.005 -0.001 -0.02
AFRIMETS.T-S1: high-temperature PRT
-0.12
-0.08
-0.04
0
0.04
0.08
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) QSAE 612 (local readout) QSAE 612 (trav. readout)
Figure 10. QSAE (NMIE): high-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 16 of 125
AFRIMETS.T-S1: low-temperature PRT
-0.08
-0.04
0
0.04
0.08
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) QSAE 794332 (local readout) QSAE 794332 (trav. readout)
Figure 11. QSAE (NMIE): low-temperature PRT.
Table 6. KEBS results.
Participant: KEBS Date: 13-Sep-2009 26-Jan-09 100.0022 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0050 3-Oct-09 100.0052 0.0044
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.013 99.9871 0.053 -0.036 0.005 0.022 0.42
70.001 127.1405 0.064 69.985 0.007 0.016 0.25
139.603 153.5485 0.071 139.563 0.009 0.040 0.56
200.023 176.0294 0.065 200.003 0.010 0.020 0.31
250.114 194.4985 0.082 250.527 0.011 -0.413 -4.98
329.155 222.8777 0.130 329.771 0.012 -0.617 -4.72
419.755 254.4800 0.133 420.467 0.014 -0.713 -5.32
449.509 264.6647 0.155 450.287 0.014 -0.778 -4.99
0.002 99.9955 0.053 -0.014 0.005 0.017 0.31
612 (trav. readout) Rtp (Ω): 100.0003
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.013 99.9870 0.053 -0.024 0.006 0.011 0.20
69.997 127.1346 0.064 69.985 0.008 0.013 0.20
139.601 153.5427 0.071 139.566 0.009 0.035 0.49
200.022 176.0254 0.065 200.014 0.010 0.008 0.12
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 17 of 125
250.160 194.5111 0.082 250.587 0.011 -0.427 -5.15
329.167 222.8792 0.130 329.805 0.013 -0.637 -4.88
419.734 254.4733 0.133 420.482 0.014 -0.748 -5.59
449.420 264.6382 0.155 450.246 0.015 -0.825 -5.29
0.002 99.9940 0.053 -0.006 0.006 0.008 0.16
Participant: KEBS Date: 13-Sep-2009 10-Mar-08 100.0503 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0517 3-Oct-09 100.0517 0.0021
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.009 100.0391 0.055 -0.022 0.003 0.012 0.22
70.002 127.6686 0.063 69.988 0.005 0.014 0.22
139.580 154.5312 0.069 139.531 0.005 0.050 0.72
199.929 177.3933 0.075 199.921 0.006 0.007 0.10
-0.011 100.0392 0.055 -0.021 0.003 0.010 0.19
-10.623 95.7954 0.054 -10.643 0.004 0.019 0.35
-0.017 100.0390 0.055 -0.022 0.003 0.005 0.09
794332 (trav. readout) Rtp (Ω): 100.0468
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.009 100.0360 0.055 -0.017 0.005 0.008 0.14
70.001 127.6623 0.063 69.988 0.006 0.013 0.21
139.580 154.5259 0.069 139.537 0.006 0.044 0.63
199.949 177.3956 0.075 199.951 0.007 -0.002 -0.02
-0.011 100.0360 0.055 -0.017 0.005 0.006 0.11
-10.659 95.7811 0.054 -10.667 0.005 0.008 0.14
-0.017 100.0360 0.055 -0.017 0.005 0.000 0.00
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 18 of 125
AFRIMETS.T-S1: high-temperature PRT
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) KEBS 612 (local readout) KEBS 612 (trav. readout)
Figure 12. KEBS: high-temperature PRT.
AFRIMETS.T-S1: low-temperature PRT
-0.08
-0.04
0
0.04
0.08
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) KEBS 794332 (local readout) KEBS 794332 (trav. readout)
Figure 13. KEBS: low-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 19 of 125
Table 7. NIMT results.
Participant: NIMT Date: 28-Oct-2009 3-Oct-09 100.0052 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0060 8-Feb-10 100.0091 0.0058
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.003 99.9982 0.014 -0.010 0.006 0.007 0.43
70.002 127.1458 0.022 69.995 0.009 0.007 0.30
140.004 153.7124 0.018 139.995 0.010 0.009 0.42
200.001 176.0268 0.008 199.991 0.012 0.010 0.69
250.003 194.3081 0.016 249.997 0.013 0.006 0.29
330.001 222.9599 0.022 329.997 0.015 0.003 0.13
419.995 254.3103 0.032 419.965 0.017 0.030 0.82
450.012 264.5657 0.032 449.988 0.017 0.023 0.63
0.005 100.0031 0.014 0.003 0.006 0.002 0.12
612 (trav. readout) Rtp (Ω): 100.0013
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.003 99.9940 0.014 -0.009 0.007 0.006 0.37
70.004 127.1390 0.022 69.993 0.009 0.011 0.47
140.004 153.7050 0.018 139.994 0.011 0.010 0.47
200.001 176.0180 0.008 199.989 0.012 0.012 0.84
250.005 194.2980 0.016 249.994 0.013 0.011 0.52
329.998 222.9450 0.022 329.984 0.015 0.013 0.50
419.995 254.3010 0.032 419.973 0.017 0.023 0.62
450.016 264.5590 0.032 450.005 0.018 0.011 0.30
0.004 99.9990 0.014 0.004 0.007 -0.001 -0.04
Participant: NIMT Date: 28-Oct-2009 3-Oct-09 100.0517 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0518 8-Feb-10 100.0521 0.0006
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-0.003 100.0445 0.010 -0.008 0.002 0.005 0.47
70.003 127.6723 0.008 69.997 0.004 0.006 0.61
140.003 154.7104 0.008 139.999 0.004 0.004 0.49
200.001 177.4212 0.008 199.995 0.005 0.006 0.59
0.001 100.0433 0.010 -0.011 0.002 0.012 1.20
-50.000 79.9460 0.008 -50.005 0.003 0.005 0.56
-20.000 92.0436 0.008 -20.004 0.003 0.005 0.53
-10.002 96.0498 0.008 -10.007 0.003 0.005 0.55
-0.007 100.0429 0.010 -0.012 0.002 0.005 0.53
794332 (trav. readout) Rtp (Ω): 100.0469
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 20 of 125
-0.003 100.0410 0.010 -0.005 0.004 0.002 0.18
70.003 127.6670 0.008 70.000 0.005 0.004 0.39
140.004 154.7050 0.008 140.005 0.005 -0.001 -0.07
200.002 177.4130 0.008 199.997 0.006 0.005 0.50
-0.005 100.0400 0.010 -0.007 0.004 0.002 0.19
-49.998 79.9420 0.008 -50.005 0.005 0.007 0.71
-19.998 92.0380 0.008 -20.007 0.005 0.009 1.00
-10.003 96.0450 0.008 -10.007 0.005 0.005 0.52
0.000 100.0430 0.010 0.000 0.004 0.000 -0.03
AFRIMETS.T-S1: high-temperature PRT
-0.04
0
0.04
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) NIMT 612 (local readout) NIMT 612 (trav. readout)
Figure 14. NIMT: high-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 21 of 125
AFRIMETS.T-S1: low-temperature PRT
-0.04
0
0.04
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) NIMT 794332 (local readout) NIMT 794332 (trav. readout)
Figure 15. NIMT: low-temperature PRT.
Table 8. UNBS results.
Participant: UNBS Date: 12-Mar-2010 8-Feb-10 100.0091 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0103 28-May-10 100.0132 0.0061
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.130 100.0505 0.662 0.113 0.006 0.017 0.03
70.060 127.0520 1.142 69.736 0.009 0.324 0.28
140.180 153.9000 0.786 140.477 0.011 -0.297 -0.38
200.560 176.2990 0.680 200.709 0.012 -0.149 -0.22
250.120 194.5540 0.558 250.652 0.013 -0.532 -0.95
0.140 100.0542 0.662 0.122 0.006 0.018 0.03
612 (trav. readout) Rtp (Ω): 100.0057
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.130 100.0460 0.662 0.113 0.007 0.017 0.03
70.060 127.1540 1.142 70.017 0.010 0.043 0.04
140.180 153.9710 0.786 140.685 0.011 -0.505 -0.64
200.580 176.3920 0.680 200.983 0.013 -0.403 -0.59
250.120 195.6690 0.558 253.753 0.014 -3.633 -6.51
0.140 100.0510 0.662 0.126 0.007 0.014 0.02
Participant: UNBS Date: 12-Mar-2010 8-Feb-10 100.0521 dRtp/√3 (°C)
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 22 of 125
794332 (local readout) Rtp (Ω): 100.0525 28-May-10 100.0533 0.0018
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.130 101.6290 0.785 3.965 0.003 -3.835 -4.88
70.060 127.5210 1.221 69.607 0.005 0.453 0.37
140.320 154.9170 0.901 140.537 0.005 -0.217 -0.24
200.610 177.7080 0.815 200.757 0.006 -0.147 -0.18
0.090 99.9540 0.785 -0.237 0.003 0.327 0.42
-19.950 91.8720 0.786 -20.433 0.003 0.483 0.61
-9.890 96.0812 0.793 -9.930 0.003 0.040 0.05
0.130 100.0730 0.785 0.061 0.003 0.069 0.09
794332 (trav. readout) Rtp (Ω): 100.0476
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.130 100.0900 0.785 0.116 0.004 0.014 0.02
70.060 127.6790 1.221 70.028 0.006 0.032 0.03
140.180 154.8530 0.901 140.390 0.006 -0.210 -0.23
200.670 177.7360 0.815 200.855 0.007 -0.185 -0.23
0.090 99.9480 0.785 -0.240 0.004 0.330 0.42
-19.950 92.0820 0.786 -19.899 0.005 -0.051 -0.07
-9.890 96.0880 0.793 -9.901 0.005 0.011 0.01
0.130 100.0660 0.785 0.056 0.004 0.074 0.09
AFRIMETS.T-S1: high-temperature PRT
-1.2
-0.8
-0.4
0
0.4
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) UNBS 612 (local readout) UNBS 612 (trav. readout)
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 23 of 125
Figure 16. UNBS: high-temperature PRT.
AFRIMETS.T-S1: low-temperature PRT
-1.2
-0.8
-0.4
0
0.4
0.8
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) UNBS 794332 (local readout) UNBS 794332 (trav. readout)
Figure 17. UNBS: low-temperature PRT.
Table 9. TBS results.
Participant: TBS Date: 19-May-2010 8-Feb-10 100.0091 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0129 28-May-10 100.0132 0.0061
612 (trav. readout) Rtp (Ω): 100.0082
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.000 100.0400 0.040 0.091 0.007 -0.091 -2.23
70.000 127.1700 0.046 70.051 0.010 -0.051 -1.08
140.000 153.7400 0.043 140.059 0.011 -0.059 -1.33
200.000 176.0600 0.046 200.070 0.013 -0.070 -1.48
251.821 195.0400 0.050 252.003 0.014 -0.182 -3.52
335.868 225.0600 0.056 335.928 0.016 -0.060 -1.02
427.911 257.0100 0.063 427.822 0.018 0.089 1.35
457.055 266.9400 0.079 456.965 0.019 0.090 1.11
0.000 100.0300 0.040 0.066 0.007 -0.066 -1.61
Participant: TBS Date: 19-May-2010 8-Feb-10 100.0521 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0532 28-May-10 100.0533 0.0018
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 24 of 125
794332 (trav. readout) Rtp (Ω): 100.0483
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.000 100.0600 0.040 0.039 0.004 -0.039 -0.97
70.000 127.6900 0.046 70.054 0.006 -0.054 -1.17
140.000 154.7200 0.043 140.038 0.006 -0.038 -0.88
200.000 177.4300 0.046 200.035 0.007 -0.035 -0.76
0.000 100.0600 0.040 0.039 0.004 -0.039 -0.97
-40.000 83.9800 0.056 -40.026 0.005 0.026 0.45
-20.000 92.0300 0.046 -20.030 0.005 0.030 0.66
-10.000 96.0400 0.041 -10.023 0.005 0.023 0.57
0.000 100.0600 0.040 0.039 0.004 -0.039 -0.97
AFRIMETS.T-S1: high-temperature PRT
-0.2
-0.16
-0.12
-0.08
-0.04
0
0.04
0.08
0.12
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) TBS 612 (local readout) TBS 612 (trav. readout)
Figure 18. TBS: high-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 25 of 125
AFRIMETS.T-S1: low-temperature PRT
-0.08
-0.04
0
0.04
0.08
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) TBS 794332 (local readout) TBS 794332 (trav. readout)
Figure 19. TBS: low-temperature PRT.
Table 10. SBS results.
Participant: SBS Date: 9-Jun-2010 28-May-10 100.0132 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0134 29-Oct-10 100.0153 0.0030
612 (trav. readout) Rtp (Ω): 100.0087
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
100.003 138.5689 0.000 99.898 0.007 0.105 14.46
Participant: SBS Date: 9-Jun-2010 28-May-10 100.0533 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0534 29-Oct-10 100.0548 0.0021
794332 (trav. readout) Rtp (Ω): 100.0485
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
-20.020 92.2078 0.000 -19.588 0.005 -0.432 -86.20
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 26 of 125
AFRIMETS.T-S1: high-temperature PRT
0
0.04
0.08
0.12
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) SBS 612 (local readout) SBS 612 (trav. readout)
Figure 20. SBS: high-temperature PRT.
AFRIMETS.T-S1: low-temperature PRT
-0.6
-0.4
-0.2
0
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) SBS 794332 (local readout) SBS 794332 (trav. readout)
Figure 21. SBS: low-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 27 of 125
Table 11. MSB results.
Participant: MSB Date: 18-Aug-2010 28-May-10 100.0132 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0143 29-Oct-10 100.0153 0.0030
612 (trav. readout) Rtp (Ω): 100.0097
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.020 100.0050 0.042 -0.002 0.005 0.022 0.52
70.044 127.1610 0.051 70.022 0.007 0.022 0.42
139.999 153.4020 0.056 139.153 0.008 0.846 14.91
200.025 176.1040 0.067 200.183 0.009 -0.158 -2.33
250.003 194.3980 0.072 250.225 0.009 -0.222 -3.04
329.935 223.0560 0.083 330.246 0.010 -0.311 -3.72
420.064 254.4990 0.094 420.488 0.012 -0.424 -4.48
449.843 264.6850 0.101 450.311 0.012 -0.468 -4.58
0.004 100.0000 0.042 -0.015 0.005 0.019 0.44
Participant: MSB Date: 18-Aug-2010 28-May-10 100.0533 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0541 29-Oct-10 100.0548 0.0021
794332 (trav. readout) Rtp (Ω): 100.0492
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.020 100.0430 0.042 -0.006 0.005 0.026 0.61
70.032 127.6770 0.051 70.018 0.006 0.014 0.28
140.006 154.6890 0.056 139.954 0.006 0.052 0.93
200.005 177.5110 0.067 200.247 0.007 -0.242 -3.59
0.004 100.0380 0.042 -0.018 0.005 0.022 0.53
-20.009 91.9420 0.052 -20.251 0.005 0.242 4.63
-10.018 95.9520 0.053 -10.245 0.005 0.227 4.28
0.013 100.0420 0.042 -0.008 0.005 0.021 0.50
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 28 of 125
AFRIMETS.T-S1: high-temperature PRT
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) MSB 612 (local readout) MSB 612 (trav. readout)
Figure 22. MSB: high-temperature PRT.
AFRIMETS.T-S1: low-temperature PRT
-0.4
-0.2
0
0.2
0.4
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) MSB 794332 (local readout) MSB 794332 (trav. readout)
Figure 23. MSB: low-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 29 of 125
Table 12. NMISA final results.
Participant: NMISA Date: 29-Oct-10 29-Oct-10 100.0147 dRtp/√3 (°C)
612 (local readout) Rtp (Ω): 100.0146 30-Oct-10 100.0138 -0.0014
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.000 100.0108 0.0023 0.000 0.002 0.000 -0.12
100.160 138.6765 0.007 100.160 0.005 0.000 -0.01
205.482 178.0611 0.008 205.475 0.006 0.007 0.75
328.525 222.4563 0.013 328.519 0.008 0.006 0.43
449.618 264.4641 0.017 449.622 0.009 -0.004 -0.20
0.000 100.0099 0.0023 -0.002 0.002 0.002 0.60
Participant: NMISA Date: 29-Oct-2010 29-Oct-10 100.0544 dRtp/√3 (°C)
794332 (local readout) Rtp (Ω): 100.0545 30-Oct-10 100.0545 0.0001
Actual Resistance U(k=2) RV U(RV) LV-RV En
temperature (°C) (Ω) (°C) (°C) (°C) (°C)
0.000 100.0504 0.0023
50.105 119.8847 0.005 50.104 0.003 0.002 0.30
150.003 158.5310 0.004 150.003 0.004 0.000 0.07
205.383 179.4429 0.004 205.378 0.005 0.005 0.79
0.000 100.0505 0.0023 0.000 0.002 0.000 -0.03
-49.198 80.2749 0.002 -49.198 0.003 0.000 -0.09
-34.694 86.1369 0.002 -34.694 0.003 0.000 -0.11
-19.826 92.1178 0.002 -19.825 0.003 0.000 -0.03
0.000 100.0504 0.0023 0.000 0.002 0.000 0.04
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 30 of 125
AFRIMETS.T-S1: high-temperature PRT
-0.04
0
0.04
0 50 100 150 200 250 300 350 400 450
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) NMISA 612 (local readout) NMISA 612 (trav. readout)
Figure 24. NMISA final: high-temperature PRT.
AFRIMETS.T-S1: low-temperature PRT
-0.04
0
0.04
-50 0 50 100 150 200 250
Temperature (°C)
LV
- R
V (
°C)
U(RSS) U(RSS) NMISA 794332 (local readout) NMISA 794332 (trav. readout)
Figure 25. NMISA final: low-temperature PRT.
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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6. CONCLUSIONS
This comparison allowed evaluation of the IPRT calibration capabilities of the participants at the 0.02 °C
level. Circulation of a digital readout with the PRTs allowed the participation of laboratories that did not have
a resistance measuring instrument suitable for measuring the travelling PRTs.
There were several discrepant results (difference from the Reference Value larger than the uncertainty of the
difference). Participants are encouraged to apply several techniques for assuring the quality of results, to
gain confidence in the results of their calibrations. Some techniques that can be applied to a PRT calibration
are:
(i) ITS-90 deviation functions can be fitted to the measured data, using the least squares technique [2]. The
number of fitted coefficients should be less than the number of data points. (For example, fit a linear or
quadratic deviation function to three or more data points.) Fit residuals which are larger than the estimated
uncertainties may indicate unidentified errors in measurement.
(ii) If two readouts are used, the consistency of the two data sets can be examined.
7. REFERENCES
[1] APMP-KC3: Key comparison of realization of the ITS-90 over the range -38.8344 °C to 419.527 °C
(final report, prepared by M. K. Nguyen and M. J. Ballico, NMIA, Lindfield, Australia. 7 Oct. 2005).
[2] H. Liedberg, “Fitting curves to thermocouple and platinum resistance thermometer calibration data,"
in Proc. of NLA/MIG Test & Measurement Conference 2005.
IPRT comparison (-50 °C to 450 °C)
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APPENDIX 1: PROTOCOL FOR AFRIMETS.T-S1
PROCEDURES FOR THE AFRIMETS REGIONAL COMPARISON OF
PLATINUM RESISTANCE THERMOMETER AND DIGITAL THERMOMETER CALIBRATIONS AGAINST
ITS-90 OVER THE RANGE -50 °C TO 450 °C (AFRIMETS.T-S1)
30 March 2009
H. Liedberg
National Metrology Institute of South Africa (NMISA)
Private Bag X34, 0040 Lynnwood Ridge, South Africa
Tel: +27-12-841 2753, Fax: +27-12-841 2131
E-mail: hliedber@nmisa.org
INTRODUCTION
This AFRIMETS regional supplementary comparison is being coordinated by the National Metrology Institute
of South Africa (NMISA), and extends from -50 °C to 450 °C. The comparison was proposed in the April
2002 report of pilot comparison SADC.T-P1 (liquid-in-glass thermometers from 0 °C to 50 °C). Invitations to
participate were sent to all SADC countries. The countries that indicated their readiness to participate are
listed in the attached Circulation Schedule.
Each participant will calibrate two platinum resistance thermometers (PRTs) and arrange for their transport
to the next participating laboratory. The Circulation Schedule for AFRIMETS.T-S1, as at March 2009, is
included as an Appendix. The comparison results will be analysed by the pilot laboratory (NMISA).
The instructions which are given below should be followed by all participants in this comparison.
The travelling thermometers are to pass through the following sequence:
High-temperature PRT (0 to 450 °C):
1) a measurement at the water triple point (0.01 °C) or ice point (0.00 °C)
2) a stabilisation procedure (annealing for one hour at 450 °C)
3) a second measurement at the water triple point or ice point
4) comparison with reference thermometer(s) at 70, 140, 200, 250, 330, 420 and 450 °C
5) a third measurement at the water triple point or ice point
Low-temperature PRT (-50 to 200 °C):
1) a measurement at the water triple point (0.01 °C) or ice point (0.00 °C)
2) a stabilisation procedure (annealing for two hours at 200 °C)
3) a second measurement at the water triple point or ice point
IPRT comparison (-50 °C to 450 °C)
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2) comparison with reference thermometer(s) at 70, 140 and 200 °C
3) a third measurement at the water triple point or ice point
2) comparison with reference thermometer(s) at -50, -20, and -10 °C
5) a fourth measurement at the water triple point or ice point
The travelling thermometer details are as follows:
High-temperature PRT:
Manufacturer: Atexis
Model: TLH600
Serial number: 612
Dimensions: 500 mm long, 5 mm diameter
Low-temperature PRT:
Manufacturer: Burns Engineering
Model: 12001
Serial number: 794332
Dimensions: 356 mm long, 6.35 mm diameter
Back-up thermometers of the same types are also circulated. If one of the above thermometers is damaged
during transit, the measurements may be performed on the back-up thermometer instead.
The details of the back-up thermometers are as follows:
High-temperature PRT:
Manufacturer: Atexis
Model: TLH600
Serial number: 616
Dimensions: 500 mm long, 5 mm diameter
Low-temperature PRT:
Manufacturer: Burns Engineering
Model: 12001
Serial number: 794333
Dimensions: 356 mm long, 6.35 mm diameter
A digital readout is circulated with the PRTs. Its details are as follows:
Description: Digital readout
Manufacturer: ASL
Model: F250
Serial number: 1228 019 081
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Dimensions: 250 x 290 x 90 mm
The thermometer artefacts and digital readout are sensitive to mechanical shock, so they must be handled
with care. For transport, the PRTs and readout should be packed in the accompanying protective case.
DETAILED INSTRUCTIONS
1. Upon receipt of the PRTs and digital readout, the host laboratory should inspect them for damage. If any
of the travelling artefacts is damaged, contact the pilot laboratory for instructions on how to proceed.
If no damage has been sustained, the host should measure the resistances of the two travelling PRTs in a
water triple point cell (0.01 °C) or ice point (0.00 °C).
If a suitable instrument for measuring electrical resistance is available in the participating lab, the two PRTs
should be measured on this instrument, as well as on channel A of the digital readout circulated with the
PRTs. (The resistance reading of the travelling digital readout should be recorded, not the temperature
reading.) If the host does not have a suitable instrument for measuring electrical resistance, the PRTs need
only be measured on the travelling digital readout (on channel A).
If the host uses his own resistance measuring instrument, an excitation current of 1 mA or 0.5 mA should be
used. If the host's resistance measuring instrument has the facility to change the excitation current, the self-
heating of the travelling PRTs should be measured by increasing or decreasing the current by a factor of √2.
The host should complete and forward (by e-mail or fax) the attached Artefact Received form to the pilot
laboratory, reporting the condition of the artefacts and the initial values of R (0.01°C) or R (0 °C).
2. Anneal the high-temperature PRT for one hour at 450 °C and the low-temperature PRT for two hours at
200 °C, in order to remove strains induced during transport and to place the resistance elements in a
reproducible state of hysteresis and oxidation. (If the host does not have a bath or furnace capable of
reaching the required annealing temperature, the low-temperature PRT may be annealed at the maximum
temperature achievable by the host, if this is lower than 200 °C. However, the high-temperature PRT should
not be annealed at a temperature below 450 °C, to avoid the formation of platinum oxide on the surface of
the resistance element.) After the annealing period, remove the PRT from the bath or furnace directly to
room temperature. After the PRTs have cooled to room temperature, re-determine R (0.01°C) or R (0 °C) as
per instruction 1.
3. If the change in R (0.01°C) or R (0 °C) of either of the PRTs is greater than 0.002 Ω, re-anneal that PRT
as per instruction 2, then re-measure R (0.01°C) or R (0 °C). If the change in R (0.01°C) or R (0 °C) after the
second anneal is greater than 0.002 Ω, contact the pilot laboratory for instructions on how to proceed.
4. Perform the measurements described below in the specified order, so that the PRTs' hysteresis is
reproducible. Record the approximate immersion depth of the tip of the PRT in the water triple point cell or
ice point, and in each bath or furnace.
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Compare the high-temperature PRT to local reference thermometer(s) at 70, 140, 200, 250, 330, 420 and
450 °C. Remove the PRT from the bath or furnace directly to room temperature. After the PRT has cooled to
room temperature, measure R (0.01°C) or R (0 °C).
Compare the low-temperature PRT to local reference thermometer(s) at 70, 140 and 200 °C. Measure R
(0.01°C) or R (0 °C). Compare the low-temperature PRT to local reference thermometer(s) at -50, -20 and
-10 °C. Measure R (0.01°C) or R (0 °C).
5. Report the results to the pilot laboratory using the attached Measurement Data form. Complete the
Instrumentation form and one Uncertainty Analysis form for each calibration temperature, and forward these
to the pilot laboratory.
Uncertainty analysis
Methods of estimating some of the uncertainty contributions listed on the Uncertainty Analysis form are given
below:
The drift of the reference thermometer since its last calibration may be estimated from its history: difference
between last and second last calibrations (at relevant temperature) / (months between last and second last
calibrations) x (months since last calibration)
Stability of R(0.01°C) or R(0°C) of the reference thermometer (if it is a PRT) or travelling PRT: The
uncertainty in the estimated value of R(0.01°C) or R(0°C) during measurement depends on the way in which
this value is estimated: if [R(0.01°C, before measurement) + R(0.01°C, after measurement)] / 2 is used, then
the uncertainty (half-width of a rectangular distribution) is
[R (0.01°C, before measurement) - R (0.01°C, after measurement)] / 2.
If R (0.01°C, before measurement) is used, then the uncertainty is
[R (0.01°C, before measurement) - R (0.01°C, after measurement)].
If R (0.01°C, during last calibration) is used for the reference PRT, then the uncertainty is
[R (0.01°C, during last calibration) - R (0.01°C, after measurement)].
This uncertainty should be propagated to the calibration temperature by multiplying by the resistance ratio at
the calibration temperature, W (t) = R (t) / R (0.01°C).
Example: Uncertainty contribution at 450 °C due to instability in R (0.01°C) of 25 Ω reference standard PRT:
R (0.01°C) of the reference PRT is measured before and after use:
R (0.01°C, before) = 24.812 5 Ω and R (0.01°C, after) = 24.812 4 Ω
[R (0.01°C, before measurement) + R (0.01°C, after measurement)] / 2 is used to calculate W
The actual temperature is calculated using this value of W
u (k=1) = [R (0.01°C, before) - R (0.01°C, after)] / 2 / √3 x W (450°C) x dt/dR
= (24.812 5 Ω – 24.812 4 Ω) / 2 / √3 x 2.67 x 11.6°C/Ω
= 0.000 9 °C
Example: Uncertainty contribution at 450 °C due to instability in R (0°C) of 100 Ω reference industrial PRT:
IPRT comparison (-50 °C to 450 °C)
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the resistance-temperature table in the PRT's calibration certificate is used to calculate the actual
temperature, i.e. R (0.01°C, during last calibration) is used:
R (0.01°C, during last calibration) = 100.014 5 Ω
R (0°C) of the reference PRT is measured after use: R (0°C, after) = 100.011 4 Ω. R (0.01°C, after)
is calculated: R (0.01°C, after) = R (0°C, after) / W (0°C) = 100.011 4 Ω / 0.999 960 9 = 100.015 3 Ω
u (k=1) = [R (0.01°C, during last cal) - R (0.01°C, after)] / √3 x W (450°C) x dt/dR
= (100.014 5 Ω – 100.015 3 Ω) / √3 x 2.64 x 2.95°C/Ω
= 0.003 6 °C
Uncertainty of reference temperature (water triple point or ice point): The uncertainty in the temperature of
the water triple point or ice point should be propagated to the calibration temperature by multiplying by the
resistance ratio at the calibration temperature, W(t) = R(t) / R(0.01°C).
Uncertainty of electrical measuring instrument:
Example: A resistance bridge with an accuracy specification of ± 1 ppm of the full-scale reading is used to
measure a 25 Ω reference PRT (at 450 °C) vs a 100 Ω standard resistor:
bridge ratio = R (t) / R (std), i.e. R (t) = bridge ratio x R (std)
u (k=1) = u (bridge ratio) / √3 x R (std) x dt/dR
= 0.000 001 / √3 x 100 Ω x 11.6°C/Ω
= 0.000 7 °C
Example: The 1 kΩ range of a digital multimeter is used to measure a 100 Ω PRT (at 450 °C):
Uncertainty of calibration of DMM: Uc (k=2) = 3mΩ + 2∙10-5
∙R
As DMMs are prone to drift (more so than resistance bridges) and it has been 3 months since the
DMM's last calibration, the 90-day drift specification of the DMM is also taken into account:
± (0.008% of reading + 0.001% of range)
dRdtku /]3
100010264108[]
2
264102003.0[)1( 2
552
5
= √ [0.004 1 Ω] 2 + [0.018 0 Ω]
2 ∙ 2.95°C/Ω
= 0.054 °C
Temperature gradient in bath / furnace (including stem conduction error): The results of the most recent
evaluation of the heat source should preferably be used, where available. Otherwise, the temperature
gradients in the heat source may be estimated by using more than one reference thermometer, or the
uniformity specification published by the manufacturer of the bath or furnace may be used. The largest
expected temperature difference between the reference thermometer and travelling PRT should be used as
the half-width of a rectangular distribution.
Repeatability: The standard deviation of the mean of several readings of the reference thermometer and
travelling PRT should be used. By taking readings over several minutes (more than one control cycle of the
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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bath/furnace), the effect of instability in the bath/furnace temperature (and different response times of the
thermometers) will be included in the standard deviation of the mean.
Example: It is preferable to use a "sandwich" measurement technique (ref1, ref2, travelling PRT, ref2, ref1),
to calculate a correction for the travelling PRT for every "sandwich" set of measurements, and to use the
standard deviation of the mean of the corrections, rather than to consider the variations in the temperatures
of the reference and travelling thermometers separately. (In the example below, the ITS-90 reference
functions are used to calculate temperatures from the measured resistance values of the travelling PRT.)
Reference PRT Travelling PRT Rtp (Ω): 100.01450
Time t(actual) (°C) Mean R (Ω) W t (°C) Correction (°C)
15:51:48 29.9227
15:52:18 29.9210 111.65649 1.1164031 29.3254 0.5955
15:52:48 29.9193
15:56:03 29.9185
15:56:33 29.9174 111.65490 1.1163872 29.3214 0.5960
15:57:03 29.9163
15:59:56 29.9143
16:00:26 29.9131 111.65327 1.1163708 29.3173 0.5958
16:00:56 29.9119
16:06:44 29.9077
16:07:14 29.9073 111.65093 1.1163474 29.3114 0.5960
16:07:44 29.9069
16:08:19 29.9055
16:08:49 29.9055 111.65059 1.1163441 29.3105 0.5950
16:09:19 29.9056
Mean: 29.9129 111.65324 1.1163705 29.3172 0.5957
Std dev: 0.0065 0.00254 0.0000253 0.0064 0.0004
No of readings: 5 5 5 5 5
Std dev of mean 0.0029 0.00113 0.0000113 0.0029 0.0002
In this example, the standard deviation of the mean of the reference PRT readings is 0.002 9 °C, that of the
travelling PRT readings is 0.002 9 °C, but that of the corrections (reference PRT – travelling PRT) is only
0.000 2 °C.
TRANSPORTATION
Packaging
Before shipping, the PRTs and readout should be carefully packed in the accompanying protective case.
Transport
The host laboratory is responsible for transport of the thermometers to the next laboratory on the Circulation
Schedule. The thermometers may be transported unaccompanied or accompanied. In either case, they
should be packed as described above before transport.
Circulation schedule
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Please forward the Artefact Shipped form to NMISA and to the next laboratory on the Circulation Schedule.
The circulation schedule allows 3 weeks for measurements and 2 weeks for transport between laboratories.
Please try to complete measurements and send the completed Measurement Data form to NMISA within the
first 2 weeks, so that any additional measurements requested by NMISA may be completed by the end of the
3rd week.
APPENDIX A: CUSTOMS DECLARATION
TO WHOM IT MAY CONCERN
The SADC Cooperation in Measurement Traceability (SADCMET) is an agency representing the National
Measurement / Standards Laboratories of Angola, Botswana, Democratic Republic of Congo (DRC),
Lesotho, Malawi, Mauritius, Mozambique, Namibia, Seychelles, South Africa, Swaziland, Tanzania, Zambia
and Zimbabwe. Its broad objective is to coordinate measurement activities and services in the SADC region,
in order to provide regional calibration and testing services with readily available traceability to the SI units of
measurement.
As part of an intercomparison program, SADCMET is conducting an intercomparison of realisations of the
International Temperature Scale of 1990 (ITS-90) in the temperature range -50°C to 450°C involving the
participants as given in the Circulation Schedule.
This intercomparison is coordinated by:
National Metrology Institute of South Africa (NMISA)
Private Bag X34
ZA-0040 Lynnwood Ridge
South Africa
The following artefacts are circulated among the participants for measurement:
Description: Platinum resistance thermometers
Manufacturer: Atexis & Burns Engineering
Serial numbers: 612, 794332, 616 and 794333
Description: Digital readout
Manufacturer: ASL
Model: F250
Serial number: 1228 019 081
The purchase cost of the platinum resistance thermometers was ZAR 5000 each, and that of the digital
readout was ZAR 33000. However, they have no commercial value (they are not for sale). They are meant
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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solely for the comparison of national standards and will be re-exported immediately after the measurements
are completed (see enclosed Circulation Schedule).
We request that the devices are not handled or removed from the container/package. If a Customs
inspection is required, please contact the relevant person listed in the attached schedule, so that he/she can
be present and help you unpack it.
....................................................
Comparison coordinator
Hans Liedberg, NMISA
International phone number: +27-12-841 2753
International fax number: +27-12-841 4458
E-mail: hliedber@nmisa.org
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APPENDIX B: CIRCULATION SCHEDULE FOR REGIONAL COMPARISON AFRIMETS.T-S1
Laboratory Contact person Time allocated
NMISA, South Africa Mr Hans Liedberg
National Institute for Standards, Egypt Dr. Khalid Ali 13 April – 3 May 2009
Quality and Standards Authority of Ethiopia Mr Wondwosen Fisseha / Ms Fitsum Tesfaye 18 May – 7 June 2009
Kenya Bureau of Standards Mr Joel Kioko / Mr Wilson Egadwa 15 June – 5 July 2009
Ugandan National Bureau of Standards Mr Yasin Lemeriga / Mr Simon Rwashana 13 July – 2 August 2009
Tanzania Bureau of Standards Ms Edna Ndumbaro / Mr Alphonce Kagoma / Mr
Adam Ziagi
10 – 30 August 2009
NMISA 14 – 20 September 2009
National Institute of Metrology (Thailand) Mr Uthai Norranim 5 – 25 October 2009
NMISA 9 – 15 November 2009
Mauritius Standards Bureau Mr Christian Ng Ha Kwong 30 November – 20 December 2009
Seychelles Bureau of Standards - NML Mr Mamy Razanajatovo / Mr Charles Celestin 11 – 31 January 2010
NMISA 15 – 21 February 2010
SIRDC – NMI Mr Victor Mundembe 1 – 21 March 2010
Botswana Bureau of Standards Mr Keeper Morgan / Mr Tebogo Kajane 5 – 25 April 2010
INNOQ, Mozambique Mr Geraldo Albasini / Mr David Armando 10 – 30 May 2010
NMISA 14 – 20 June 2010
Malawi Bureau of Standards Mr Davlin Chokazinga 5 – 25 July 2010
Zambia Bureau of Standards Mr Fredrick Hamutunda / Mr Victor Mwazi 9 – 29 August 2010
NMISA 13 – 19 September 2010
Organisation Contact person Street address Country Telephone Fax Email
NMISA Mr Hans Liedberg Blg 6 - CSIR campus, Meiring
Naudé Road, Brummeria,
South Africa +27-12-841 2753 +27-12-841 4458 / 2131 hliedber@nmisa.org
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Pretoria
National Institute for
Standards
Dr. Khalid Ali Tersa St., Al Ahram, El Giza Egypt + 20-2-704 4310 +20-2-338 67451, +20-
10-579 0620
khalid_ali_nis@yahoo.com
Quality and
Standards Authority
of Ethiopia
Mr Wondwosen
Fisseha / Ms Fitsum
Tesfaye
Bole sub city, Kebele 12/13,
near AMCE, PO Box 2310,
Addis Ababa
Ethiopia +251-11-6460 542 +251-11-6460 880 / 881 wondwosen@qsae.org,
qsaemetrology@ethionet.et /
fitsumtesfaye@yahoo.com,
fitsumtesfaye@hotmail.com
Kenya Bureau of
Standards
Mr Joel Kioko / Mr
Wilson Egadwa
KEBS Centre, Kapiti Rd, off
Mombasa Rd, behind Bellevue
Cinema, Nairobi
Kenya +254-20-605 490 +254-20-609 660 jkioko@kebs.org /
egadwaw@kebs.org,
wmisigo@yahoo.com
Uganda National
Bureau of Standards
Mr Yasin Lemeriga /
Mr Simon Rwashana
Plot M217, Nakawa Industrial
Area (next to Pepsi-Cola),
Kampala
Uganda +256-41-222 367 +256-41-286 123 yasin.lemeriga@unbs.go.ug,
yasin_lemeriga@hotmail.com /
simon.rwashana@unbs.go.ug
Tanzania Bureau of
Standards
Ms Edna Ndumbaro /
Mr Alphonce Kagoma
/ Mr Adam Ziagi
Morogoro / Sam Nujoma Road
– Ubungo, P.O.Box 9524, Dar-
Es-Salaam
Tanzania +255-22-245 0298 +255-22-245 0959 ednasmn@yahoo.co.uk /
silikag@yahoo.com /
aziagi@yahoo.com
National Institute of
Metrology (Thailand)
Mr Uthai Norranim 3/5 Moo 3 Technopolis, Klong
V, Klong Luang, Pathumthani
12120
Thailand +662 577 5100 +662 577 5092 uthai@nimt.or.th
Mauritius Standards
Bureau
Mr Christian Ng Ha
Kwong
Villa Road, Moka Mauritius +230-433 3648 +230-433 5051 cnghakwong@msb.intnet.mu
Seychelles Bureau of
Standards - NML
Mr Mamy
Razanajatovo / Mr
Charles Celestin
PO Box 953, Victoria, Mahé Seychelles +248-375 333/174
+248-380 400
+248-375 151
+248-373 826
sbsorg@seychelles.net
SIRDC – NMI Mr Victor Mundembe
/ Mr Mathew
1574 Alpes Road, Hatcliffe,
Harare
Zimbabwe +263-4-86 0321/33,
+263-23-86 0321
+263-4-86 0350/1 vmundembe@sirdc.ac.zw /
vmundembe@hotmail.com /
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AFRIMETS.T-S1 Final report (16 August 2017)
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Ranganai mranganai@sirdc.ac.zw /
mathewranganai@yahoo.com
Botswana Bureau of
Standards
Mr Keeper Morgan /
Mr Tebogo Kajane
Plot 55745, Main Airport Road,
Block 8, Gaborone
Botswana +267-3903200
+267 - 3645405
+267-3903120 k_morgan@bobstandards.bw /
s_kajane@bobstandards.bw
INNOQ Mr Geraldo Albasini /
Mr David Armando
Av. 25 de Setembro, 1179 2
andar, Maputo
Moçambique +258-1-303 822/3 +258-1-304 206 innoq@emilmoz.com /
algeraldo@yahoo.com.br /
magamz2003@yahoo.com.br
Malawi Bureau of
Standards
Mr Davlin
Chokazinga
Moirs Road, Christwick,
Blantyre
Malawi +265 147 0488 /
+265 1 670 488
+265 167 0759 /
+265 1 670 756
davlinchokazinga@mbsmw.org
Zambia Bureau of
Standards
Mr Fredrick
Hamutunda / Mr
Victor Mwazi
Lechwe House, Plot Number
4526, Freedom Way – South
End, Lusaka
Zambia +260-21-1-231385, cell:
+260-977 579 191,
+260-977 776 062
+260-21-1-238483 hamutunda@zabs.org.zm,
hamutunda@yahoo.com /
mwazi@kth.se /
vlmwazi@yahoo.com
APPENDIX C: ARTEFACT RECEIVED
TO: NMISA
ATTN: Hans Liedberg DATE:
FAX NO: +27-12-841 2131/4458 TEL NO: +27-12-841 2753
FROM: NO OF PAGES: 1
AFRIMETS Regional Supplementary Comparison AFRIMETS.T-S1
The platinum resistance thermometers serial numbers 612, 794332, 616 and 794333
were received at ............................................................... on (date) ............................................
The condition when they were received was
IPRT comparison (-50 °C to 450 °C)
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612: * in good physical and working order
* damaged (explain)
794332: * in good physical and working order
* damaged (explain)
616: * in good physical and working order
* damaged (explain)
794333: * in good physical and working order
* damaged (explain)
Reference temperature: water triple point (0.01°C) or ice point (0.00°C) (delete whichever is not applicable)
Serial number: 612 Serial number: 794332
on local measuring instrument on travelling on local measuring instrument on travelling
Current (mA) Resistance (Ω) readout (channel A) Current (mA) Resistance (Ω) readout (channel A)
R(0.01°C) or
R(0 °C) (Ω):
R(0.01°C) or
R(0 °C) (Ω):
APPENDIX C (cntd): ARTEFACT SHIPPED
TO: NMISA
ATTN: Hans Liedberg DATE:
FAX NO: +27-12-841 2131/4458 TEL NO: +27-12-841 2753
FROM: NO OF PAGES: 1
AFRIMETS Regional Supplementary Comparison AFRIMETS.T-S1
The platinum resistance thermometers serial numbers 612, 794332, 616 and 794333
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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were shipped to ............................................................... on (date) ............................................
The flight number / tracking number is .............................................................
..........................................................................
(name of participant)
APPENDIX D: MEASUREMENT DATA
TO: NMISA
ATTN: Hans Liedberg DATE:
FAX NO: +27-12-841 2131/4458 TEL NO: +27-12-841 2753
FROM: NO OF PAGES: 1
AFRIMETS Regional Supplementary Comparison AFRIMETS.T-S1
Laboratory name: ................................................................................ Metrologist: ................................................................................
Dates of measurement: .......................................... to .............................................
Thermometers measured: 612 794332 616 794333 (delete whichever are not applicable)
Reference temperature: water triple point (0.01°C) or ice point (0.00°C) (delete whichever is not applicable)
Serial number: 612 Serial number: 794332
on local measuring instrument on travelling on local measuring instrument on travelling
Current (mA) Resistance (Ω) readout (channel A) Current (mA) Resistance (Ω) readout (channel A)
R(0.01°C) or
R(0 °C) (Ω):
R(0.01°C) or
R(0 °C) (Ω):
Annealing Annealing
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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temperature (°C): temperature (°C):
Annealing period
(hours):
Annealing period
(hours):
R(0.01°C) or
R(0 °C) (Ω):
R(0.01°C) or
R(0 °C) (Ω):
Annealing
temperature (°C):
Annealing
temperature (°C):
Annealing period
(hours):
Annealing period
(hours):
R(0.01°C) or
R(0 °C) (Ω):
R(0.01°C) or
R(0 °C) (Ω):
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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APPENDIX D (cntd): MEASUREMENT DATA
On local resistance measuring instrument: Current (mA): .............................................
Serial number: 612 Serial number: 794332
Nominal
temperature (°C)
Actual
temperature (°C)
PRT
resistance (Ω)
Immersion
depth (mm)
Nominal
temperature (°C)
Actual
temperature (°C)
PRT
resistance (Ω)
Immersion
depth (mm)
0 0
70 70
140 140
200 200
250 0
330 -50
420 -20
450 -10
0 0
On channel A of travelling digital readout:
Serial number: 612 Serial number: 794332
Nominal
temperature (°C)
Actual
temperature (°C)
PRT
resistance (Ω)
Immersion
depth (mm)
Nominal
temperature (°C)
Actual
temperature (°C)
PRT
resistance (Ω)
Immersion
depth (mm)
0 0
70 70
140 140
IPRT comparison (-50 °C to 450 °C)
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200 200
250 0
330 -50
420 -20
450 -10
0 0
IPRT comparison (-50 °C to 450 °C)
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APPENDIX E: UNCERTAINTY ANALYSIS
TO: NMISA
ATTN: Hans Liedberg DATE:
FAX NO: +27-12-841 2131/4458 TEL NO: +27-12-841 2753
FROM: NO OF PAGES: 1
AFRIMETS Regional Supplementary Comparison AFRIMETS.T-S1
Laboratory name: ............................................................................................
Temperature (°C): ............................................................................................
Source of uncertainty Value Unit Probability
distribution Divisor
Sensitivity
(°C / unit)
Uncertainty
contribution (k=1) (°C)
Degrees of
freedom
Calibration of reference thermometer Normal 2
Drift of reference thermometer since last
calibration
Rectangular 1.732
Stability of R(0.01°C) or R(0°C): ref thermometer
(if it is a PRT)
Rectangular 1.732
Uncertainty of reference temperature (water
triple point or ice point): ref thermometer
Uncertainty of electrical measuring instrument:
ref thermometer
Temperature gradient in bath / furnace (including
stem conduction error)
Rectangular 1.732
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Stability of R(0.01°C) or R(0°C): UUT
Uncertainty of reference temperature (water
triple point or ice point): UUT
Uncertainty of electrical measuring instrument:
UUT
Repeatability Normal 1
Other (please specify)
Combined uncertainty (k=1): X X X X
APPENDIX F: DETAILS OF INSTRUMENTATION USED IN THE COMPARISON
TO: NMISA
ATTN: Hans Liedberg DATE:
FAX NO: +27-12-841 2131/4458 TEL NO: +27-12-841 2753
FROM: NO OF PAGES: 1
AFRIMETS Regional Supplementary Comparison AFRIMETS.T-S1
Laboratory name: ............................................................................................
Local resistance measuring instrument: Type: ........................................ Manufacturer: ........................................ Model: ........................................
Note: Instrument type = AC resistance bridge (specify frequency, if known), DC resistance bridge, digital multimeter, etc
Nominal Reference thermometer Heat source
temperature (°C) Type Manufacturer Model S/N Type Manufacturer Model
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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-50
-20
-10
0
70
140
200
250
330
420
450
Note: Reference thermometer type = standard PRT (SPRT), industrial PRT (IPRT), type R thermocouple, etc (or none, if ice point is used as temperature reference).
Heat source type = stirred liquid bath, fluidised bath, ice point, horizontal tube furnace, etc. If tube furnace is used, please specify if it is used with or without a
thermal equalising block.
IPRT comparison (-50 °C to 450 °C)
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APPENDIX 2: INSTRUMENTATION
NMISA:
Local resistance measuring instrument: Type: AC resistance bridge (25 Hz) Manufacturer: ASL Model: F18
Nominal Reference thermometer Heat source
temperature (°C) Type Manufacturer Model S/N Type Manufacturer Model
-50 SPRT Leeds & Northrup 8167-25 1827488 stirred liquid bath Heto CB217
-20 SPRT Leeds & Northrup 8167-25 1827488 stirred liquid bath Heto CB217
-10 SPRT Leeds & Northrup 8167-25 1827488 stirred liquid bath Heto CB217
0 WTP cell Jarrett or Hart A11 or 5901A 2035, 2048 or 1181
70 SPRT Leeds & Northrup 8167-25 1827488 stirred liquid bath Isotech 915
140 SPRT Leeds & Northrup 8167-25 1827488 stirred liquid bath Isotech 915
200 SPRT Leeds & Northrup 8167-25 1827488 stirred liquid bath Isotech 915
250 SPRT Tinsley 5187SA 269581 stirred liquid bath Heto JH02
330 SPRT Tinsley 5187SA 269581 stirred liquid bath Heto JH02
420 SPRT Tinsley 5187SA 269581 stirred liquid bath Heto JH02
450 SPRT Tinsley 5187SA 269581 stirred liquid bath Heto JH02
NIS:
Local resistance measuring instrument: Type: AC resistance bridge (75 Hz) Manufacturer: Tinsley Model: Senator
Nominal Reference thermometer Heat source
temperature (°C) Type Manufacturer Model S/N Type Manufacturer Model
-50 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 7381
-20 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 7381
-10 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 7381
0 SPRT Fluke 5628 1748 Ice bath Home made --
IPRT comparison (-50 °C to 450 °C)
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70 SPRT Fluke 5628 1748 stirred liquid bath ISOTECH NIXON 815M
140 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 6054
200 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 6054
250 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 6055
330 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 6055
420 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 6055
450 SPRT Fluke 5628 1748 stirred liquid bath Fluke Hart Scientific 6055
IPRT comparison (-50 °C to 450 °C)
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QSAE (NMIE):
Local resistance measuring instrument: Type: Resistance bridge Manufacturer: Hart Scientific Model: Super thermometer
Nominal Reference thermometer Heat source
temperature (°C) Type Manufacturer Model S/N Type Manufacturer Model
-50 SPRT H. TINSLEY 5187 S.A. 250236 Stirred Alcohol bath LAUDA, Germany RLS6
-20 SPRT H. TINSLEY 5187 S.A. 250236 Stirred Alcohol bath LAUDA, Germany RLS6
-10 SPRT H. TINSLEY 5187 S.A. 250236 Stirred Alcohol bath LAUDA, Germany RLS6
0 SPRT H. TINSLEY 5187 S.A. 250236 Ice point - 4000ml
70 SPRT H. TINSLEY 5187 S.A. 250236 Stirred Water bath LAUDA, Germany CSD30
140 SPRT H. TINSLEY 5187 S.A. 250236 Stirred Oil bath LAUDA, Germany R 400
200 SPRT H. TINSLEY 5187 S.A. 250236 Stirred Oil bath LAUDA, Germany R 400
250 SPRT H. TINSLEY 5187 S.A. 250236 Fluidised bath Techne, England FB-08
330 SPRT H. TINSLEY 5187 S.A. 250236 Fluidised bath Techne, England FB-08
420 SPRT H. TINSLEY 5187 S.A. 250236 Fluidised bath Techne, England FB-08
450 SPRT H. TINSLEY 5187 S.A. 250236 Fluidised bath Techne, England FB-08
KEBS:
Local res meas
instrum: Type: DIGITAL MULTIMETER Manufacturer: ANTON PAAR Model: UUT: MKT100, ref std: MKT25
Nominal Reference thermometer Heat source
temperature (°C) Type Manufacturer Model S/N Type Manufacturer Model
-10 SPRT Isotech 909L/909Q 1415/1561 Alcohol Bath with equalising
block
Mgw Lauda UK 80
DK
0 SPRT Isotech 909L/909Q 1415/1561 Ice Bath Isotherm -
IPRT comparison (-50 °C to 450 °C)
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70 SPRT Isotech 909L/909Q 1415/1561 Water Bath Tamson TV 7000
140 SPRT Isotech 909L/909Q 1415/1561 Oil Bath with equalising
block
Tamson TV 5000
200 SPRT Isotech 909L/909Q 1415/1561 Oil Bath with equalising
block
Tamson TV 5000
250 SPRT Isotech 909L/909Q 1415/1561 Sand Bath with equalising
block
Isotech Ayries
330 SPRT Isotech 909L/909Q 1415/1561 Sand Bath with equalising
block
Isotech Ayries
420 SPRT Isotech 909L/909Q 1415/1561 Sand Bath with equalising
block
Isotech Ayries
450 SPRT Isotech 909L/909Q 1415/1561 Sand Bath with equalising
block
Isotech Ayries
NIMT:
Local resistance measuring instrument: Type: Resistance bridge Manufacturer: Hart Scientific Model: Super thermometer
Nominal Reference thermometer Heat source
temperature (°C) Type Manufacturer Model S/N Type Manufacturer Model
-50 SPRT H. Tinsley 5187SA 280419 stirred liquid bath FLUKE 7381
-20 SPRT H. Tinsley 5187SA 280419 stirred liquid bath FLUKE 7381
-10 SPRT H. Tinsley 5187SA 280419 stirred liquid bath FLUKE 7381
0 SPRT H. Tinsley 5187SA 280419 stirred liquid bath FLUKE 7381
70 SPRT Hart Scientific 5681 1522 stirred liquid bath FLUKE 6331
140 SPRT Hart Scientific 5681 1522 stirred liquid bath FLUKE 6331
200 SPRT Hart Scientific 5681 1522 stirred liquid bath FLUKE 6331
250 SPRT Hart Scientific 5681 1522 stirred liquid bath FLUKE 6331
330 SPRT ISOTECH 935-14-77 43 stirred liquid bath Hart Scientific 6055
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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420 SPRT ISOTECH 935-14-77 43 stirred liquid bath Hart Scientific 6055
450 SPRT ISOTECH 935-14-77 43 stirred liquid bath Hart Scientific 6055
MSB:
Local resistance measuring instrument: Type: DC resistance meter Manufacturer: Isotech Model: TTI22
Nominal Reference thermometer Heat source
temperature (°C) Type Manufacturer Model S/N Type Manufacturer Model
-50
-20 SPRT Isotech 670SH 029 metal block bath Isotech Oceanus 580
-10 SPRT Isotech 670SH 029 metal block bath Isotech Oceanus 580
0 SPRT Isotech 670SH 029 ice point
70 SPRT Isotech 670SH 029 stirred liquid bath Heto KB22-1
140 SPRT Isotech 670SH 029 stirred liquid bath Heto KB12-1
200 SPRT Isotech 670SH 029 metal block bath Isotech Medusa 510
250 SPRT Isotech 670SH 029 metal block bath Isotech Medusa 510
330 SPRT Isotech 670SH 029 metal block bath Isotech Medusa 510
420 SPRT Isotech 670SH 029 metal block bath Isotech Medusa 510
450 SPRT Isotech 670SH 029 metal block bath Isotech Medusa 510
IPRT comparison (-50 °C to 450 °C)
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APPENDIX 3: UNCERTAINTY BUDGETS
NMISA:
Temperature (°C): 0 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00005 °C Normal 1 1 0.0001 500
Drift of reference thermometer since last cal
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT)
Uncert of ref temperature (WTP or ice point): ref thermometer
Uncert of electrical measuring instrument: ref thermometer
Temp gradient in bath/furnace (incl stem conduction error) 0.00008 °C Rectangular 1.732050808 1 0.0000 500
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 250.712356 0.0000 41
Repeatability
Temp coeff of ref resistor 0.2 °C Rectangular 1.732050808 -0.0001254 0.0000 500
Combined uncertainty (k=1): X X X X 0.0001
Expanded uncertainty (k=2) (°C): 0.0002
Temperature (°C): 70 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00080 °C Normal 2 1 0.0004 500
Drift of reference thermometer since last cal 0.00120 °C Rectangular 1.732050808 1 0.0007 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 1.19830661 0.0000 500
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 1.19830661 0.0002 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 996.301017 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00260 °C Rectangular 1.732050808 1 0.0015 500
Stability of R(0.01°C) or R(0°C): UUT 0.00045 °C Rectangular 1.732050808 1.19830661 0.0003 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 1.19830661 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 254.584799 0.0000 500
Repeatability 0.00030 °C Normal 1 1 0.0003 2
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0018
Expanded uncertainty (k=2) (°C): 0.0035
Temperature (°C): 140 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00120 °C Normal 2 1 0.0006 500
Drift of reference thermometer since last cal 0.00170 °C Rectangular 1.732050808 1 0.0010 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 1.48920855 0.0000 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 1.48920855 0.0002 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 1019.53019 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00260 °C Rectangular 1.732050808 1 0.0015 500
Stability of R(0.01°C) or R(0°C): UUT 0.00045 °C Rectangular 1.732050808 1.48920855 0.0004 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 1.48920855 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 260.52055 0.0000 500
Repeatability 0.00069 °C Normal 1 1 0.0007 2
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0021
Expanded uncertainty (k=2) (°C): 0.0041
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Temperature (°C): 200 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00100 °C Normal 2 1 0.0005 500
Drift of reference thermometer since last cal 0.00080 °C Rectangular 1.732050808 1 0.0005 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 1.77368143 0.0000 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 1.77368143 0.0003 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 1043.56269 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00260 °C Rectangular 1.732050808 1 0.0015 500
Stability of R(0.01°C) or R(0°C): UUT 0.00045 °C Rectangular 1.732050808 1.77368143 0.0005 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 1.77368143 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 266.661574 0.0000 500
Repeatability 0.00062 °C Normal 1 1 0.0006 2
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0018
Expanded uncertainty (k=2) (°C): 0.0037
Temperature (°C): 250 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00090 °C Normal 2 1 0.0005 500
Drift of reference thermometer since last cal 0.00060 °C Rectangular 1.732050808 1 0.0003 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00007 °C Rectangular 1.732050808 1.95887026 0.0001 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 1.95887026 0.0003 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 1091.6208 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00430 °C Rectangular 1.732050808 1 0.0025 500
Stability of R(0.01°C) or R(0°C): UUT 0.00045 °C Rectangular 1.732050808 1.95887026 0.0005 500
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 1.95887026 0.0002 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 270.852954 0.0000 500
Repeatability 0.00009 °C Normal 1 1 0.0001 7
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0026
Expanded uncertainty (k=2) (°C): 0.0052
Temperature (°C): 330 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00110 °C Normal 2 1 0.0006 500
Drift of reference thermometer since last cal 0.00190 °C Rectangular 1.732050808 1 0.0011 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00007 °C Rectangular 1.732050808 2.32926118 0.0001 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 2.32926118 0.0003 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 1127.63919 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00585 °C Rectangular 1.732050808 1 0.0034 500
Stability of R(0.01°C) or R(0°C): UUT 0.00045 °C Rectangular 1.732050808 2.32926118 0.0006 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 2.32926118 0.0002 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 279.789836 0.0000 500
Repeatability 0.00029 °C Normal 1 1 0.0003 9
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0037
Expanded uncertainty (k=2) (°C): 0.0074
Temperature (°C): 450 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00150 °C Normal 2 1 0.0008 500
IPRT comparison (-50 °C to 450 °C)
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Drift of reference thermometer since last cal 0.00300 °C Rectangular 1.732050808 1 0.0017 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00007 °C Rectangular 1.732050808 2.66770315 0.0001 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 2.66770315 0.0004 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 1164.09065 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00585 °C Rectangular 1.732050808 1 0.0034 500
Stability of R(0.01°C) or R(0°C): UUT 0.00045 °C Rectangular 1.732050808 2.66770315 0.0007 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 2.66770315 0.0002 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 288.834173 0.0000 500
Repeatability 0.00034 °C Normal 1 1 0.0003 9
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0040
Expanded uncertainty (k=2) (°C): 0.0079
Temperature (°C): 0 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00005 °C Normal 1 1 0.0001 500
Drift of reference thermometer since last cal
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT)
Uncert of ref temperature (WTP or ice point): ref thermometer
Uncert of electrical measuring instrument: ref thermometer
Temp gradient in bath/furnace (incl stem conduction error) 0.00008 °C Rectangular 1.732050808 1 0.0000 500
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 250.712356 0.0000 41
Repeatability
Temp coeff of ref resistor 0.2 °C Rectangular 1.732050808 -0.0001254 0.0000 500
IPRT comparison (-50 °C to 450 °C)
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Combined uncertainty (k=1): X X X X 0.0001
Expanded uncertainty (k=2) (°C): 0.0002
Temperature (°C): 70 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00080 °C Normal 2 1 0.0004 500
Drift of reference thermometer since last cal 0.00120 °C Rectangular 1.732050808 1 0.0007 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 1.19830661 0.0000 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 1.19830661 0.0002 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 996.301017 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00260 °C Rectangular 1.732050808 1 0.0015 500
Stability of R(0.01°C) or R(0°C): UUT 0.00025 °C Rectangular 1.732050808 1.19830661 0.0002 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 1.19830661 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 254.584799 0.0000 500
Repeatability 0.00030 °C Normal 1 1 0.0003 2
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0018
Expanded uncertainty (k=2) (°C): 0.0035
Temperature (°C): 140 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00120 °C Normal 2 1 0.0006 500
Drift of reference thermometer since last cal 0.00170 °C Rectangular 1.732050808 1 0.0010 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 1.48920855 0.0000 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 1.48920855 0.0002 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 1019.53019 0.0001 41
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 62 of 125
Temp gradient in bath/furnace (incl stem conduction error) 0.00260 °C Rectangular 1.732050808 1 0.0015 500
Stability of R(0.01°C) or R(0°C): UUT 0.00025 °C Rectangular 1.732050808 1.48920855 0.0002 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 1.48920855 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 260.52055 0.0000 500
Repeatability 0.00069 °C Normal 1 1 0.0007 2
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0020
Expanded uncertainty (k=2) (°C): 0.0041
Temperature (°C): 200 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00100 °C Normal 2 1 0.0005 500
Drift of reference thermometer since last cal 0.00080 °C Rectangular 1.732050808 1 0.0005 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 1.77368143 0.0000 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 1.77368143 0.0003 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 1043.56269 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00260 °C Rectangular 1.732050808 1 0.0015 500
Stability of R(0.01°C) or R(0°C): UUT 0.00025 °C Rectangular 1.732050808 1.77368143 0.0003 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 1.77368143 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 266.661574 0.0000 500
Repeatability 0.00062 °C Normal 1 1 0.0006 7
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0018
Expanded uncertainty (k=2) (°C): 0.0036
Temperature (°C): -50 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
IPRT comparison (-50 °C to 450 °C)
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distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00060 °C Normal 2 1 0.0003 500
Drift of reference thermometer since last cal 0.00030 °C Rectangular 1.732050808 1 0.0002 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 0.80698914 0.0000 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 0.80698914 0.0001 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 966.493185 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00074 °C Rectangular 1.732050808 1 0.0004 500
Stability of R(0.01°C) or R(0°C): UUT 0.00025 °C Rectangular 1.732050808 0.80698914 0.0001 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 0.80698914 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 246.968004 0.0000 500
Repeatability 0.00023 °C Normal 1 1 0.0002 4
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0006
Expanded uncertainty (k=2) (°C): 0.0013
Temperature (°C): -20 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00050 °C Normal 2 1 0.0003 500
Drift of reference thermometer since last cal 0.00030 °C Rectangular 1.732050808 1 0.0002 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 0.92204666 0.0000 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 0.92204666 0.0001 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 975.343222 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00074 °C Rectangular 1.732050808 1 0.0004 500
Stability of R(0.01°C) or R(0°C): UUT 0.00025 °C Rectangular 1.732050808 0.92204666 0.0001 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 0.92204666 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 249.229454 0.0000 500
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Repeatability 0.00038 °C Normal 1 1 0.0004 2
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0007
Expanded uncertainty (k=2) (°C): 0.0014
Temperature (°C): -10 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.00030 °C Normal 2 1 0.0002 500
Drift of reference thermometer since last cal 0.00030 °C Rectangular 1.732050808 1 0.0002 500
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00002 °C Rectangular 1.732050808 0.96091869 0.0000 500
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00030 °C Normal 2 0.96091869 0.0001 500
Uncert of electrical measuring instrument: ref thermometer 2.E-07 Ω/Ω Normal 2 978.23574 0.0001 41
Temp gradient in bath/furnace (incl stem conduction error) 0.00074 °C Rectangular 1.732050808 1 0.0004 500
Stability of R(0.01°C) or R(0°C): UUT 0.00025 °C Rectangular 1.732050808 0.96091869 0.0001 500
Uncert of ref temperature (WTP or ice point): UUT 0.00015 °C Normal 2 0.96091869 0.0001 500
Uncert of electrical measuring instrument: UUT 2.E-07 Ω/Ω Normal 2 249.968579 0.0000 500
Repeatability 0.00022 °C Normal 1 1 0.0002 2
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0006
Expanded uncertainty (k=2) (°C): 0.0012
NIS:
Temperature (°C): 0 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.0025 °C Normal 2 1 0.0013 ∞
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Drift of reference thermometer since last cal 0.0002 °C Rectangular 1.732 1 0.0001 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0001 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 1 0.0001 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.003 °C Rectangular 1.732 1 0.0009 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0007 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0001 ∞
Uncert of electrical measuring instrument: UUT 0.005 °C Rectangular 1.732 2.5 0.0020 ∞
Repeatability 0.0001 °C Normal 1 1 0.0001 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0027
Expanded uncertainty (k=2) (°C): 0.0054
Temperature (°C): 70 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0002 °C Rectangular 1.732 1 -0.0001 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0001 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 1 0.0001 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.003 °C Rectangular 1.732 1 0.0009 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0009 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0001 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.007 °C Normal 1 1 0.0070 5
Other (please specify)
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Combined uncertainty (k=1): X X X X 0.0083
Expanded uncertainty (k=2) (°C): 0.0166
Temperature (°C): 140 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0006 °C Rectangular 1.732 1 -0.0004 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0002 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 0.0002 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.003 °C Rectangular 1.732 1 0.0009 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0011 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.011 °C Normal 1 1 0.0110 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0119
Expanded uncertainty (k=2) (°C): 0.0238
Temperature (°C): 200 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.00243 °C Rectangular 1.732 1 -0.0014 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0002 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 67 of 125
Temp gradient in bath/furnace (incl stem conduction error) 0.003 °C Rectangular 1.732 1 0.0009 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0013 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.027 °C Normal 1 1 0.0270 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0274
Expanded uncertainty (k=2) (°C): 0.0548
Temperature (°C): 250 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0026 °C Rectangular 1.732 1 -0.0015 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0002 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.004 °C Rectangular 1.732 1 0.0012 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0014 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.0119 °C Normal 1 1 0.0119 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0128
Expanded uncertainty (k=2) (°C): 0.0256
Temperature (°C): 330 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 68 of 125
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0051 °C Rectangular 1.732 1 -0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0002 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 0.0003 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.006 °C Rectangular 1.732 1 0.0017 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0016 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 0.0003 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.0275 °C Normal 1 1 0.0275 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0280
Expanded uncertainty (k=2) (°C): 0.0560
Temperature (°C): 420 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0113 °C Rectangular 1.732 1 -0.0065 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0003 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 0.0003 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.007 °C Rectangular 1.732 1 0.0020 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0018 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0003 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Repeatability 0.0192 °C Normal 1 1 0.0192 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0209
Expanded uncertainty (k=2) (°C): 0.0418
Temperature (°C): 450 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0137 °C Rectangular 1.732 1 -0.0079 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0003 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 0.0003 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.008 °C Rectangular 1.732 1 0.0023 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0019 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0003 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.1287 °C Normal 1 1 0.1287 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.1290
Expanded uncertainty (k=2) (°C): 0.2580
Temperature (°C): 0 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 Normal 2 0.0013 ∞
Drift of reference thermometer since last cal -0.0001 °C Rectangular 1.732 1 -0.0001 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0001 ∞
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 0.0001 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.006 °C Rectangular 1.732 1 0.0017 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0007 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 0.0001 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.0024 °C Normal 1 1 0.0024 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0052
Expanded uncertainty (k=2) (°C): 0.0104
Temperature (°C): 70 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.0025 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0002 °C Rectangular 1.732 1 -0.0001 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0001 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 1 0.0001 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.003 °C Rectangular 1.732 1 0.0009 ∞
Stability of R(0.01°C) or R(0°C): UUT 0 ohm Rectangular 1.732 2.5 0.0000 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0001 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.016 °C Normal 1 1 0.0160 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0166
Expanded uncertainty (k=2) (°C): 0.0332
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Temperature (°C): 140 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.0025 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0006 °C Rectangular 1.732 1 -0.0004 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0002 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.003 °C Rectangular 1.732 1 0.0009 ∞
Stability of R(0.01°C) or R(0°C): UUT 0 ohm Rectangular 1.732 2.5 0.0000 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.0004 °C Normal 1 1 0.0004 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0044
Expanded uncertainty (k=2) (°C): 0.0088
Temperature (°C): 200 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.0025 Normal 2 0.0013 ∞
Drift of reference thermometer since last cal -0.0024 °C Rectangular 1.732 1 -0.0014 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0002 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.003 °C Rectangular 1.732 1 0.0009 ∞
Stability of R(0.01°C) or R(0°C): UUT 0 ohm Rectangular 1.732 2.5 0.0000 ∞
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 72 of 125
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 1 0.0002 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.0091 °C Normal 1 1 0.0091 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0102
Expanded uncertainty (k=2) (°C): 0.0204
Temperature (°C): -50 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal 0.0002 °C Rectangular 1.732 1 0.0001 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0001 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 0.0001 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.006 °C Rectangular 1.732 1 0.0017 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0006 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 0.0001 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.0014 °C Normal 1 0.0014 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0048
Expanded uncertainty (k=2) (°C): 0.0096
Temperature (°C): -20 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 73 of 125
Drift of reference thermometer since last cal -0.0001 °C Rectangular 1.732 1 -0.0001 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0001 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 0.0001 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.006 °C Rectangular 1.732 1 0.0017 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0007 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 0.0001 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.0014 °C Normal 1 0.0014 5
Other (please specify)
Combined uncertainty (k=1): X X X X 0.0049
Expanded uncertainty (k=2) (°C): 0.0098
Temperature (°C): -10 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.003 °C Normal 2 1 0.0013 ∞
Drift of reference thermometer since last cal -0.0001 °C Rectangular 1.732 1 -0.0001 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.00003 ohm Rectangular 1.732 11.6 -0.0001 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0002 °C Rectangular 1.732 0.0001 ∞
Uncert of electrical measuring instrument: ref thermometer 1 ppm ohm Rectangular 1.732 11.6 0.0007 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.006 °C Rectangular 1.732 1 0.0017 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.001 ohm Rectangular 1.732 2.5 0.0007 ∞
Uncert of ref temperature (WTP or ice point): UUT 0.0002 °C Rectangular 1.732 0.0001 ∞
Uncert of electrical measuring instrument: UUT 0.01 °C Rectangular 1.732 2.5 0.0040 ∞
Repeatability 0.0005 °C Normal 1 1 0.0005 5
Other (please specify)
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Combined uncertainty (k=1): X X X X 0.0047
Expanded uncertainty (k=2) (°C): 0.0094
QSAE (NMIE):
Temperature (°C): 0 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal 0 mK Rectangular 1.732 0.001 0.0000
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00056227 oC Rectangular 1.732 1 0.0003
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00249991 oC Rectangular 1.732 1 0.0014
Uncert of electrical measuring instrument: ref thermometer 1.0106E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.02 oC Rectangular 1.732 1 0.0115
Stability of R(0.01°C) or R(0°C): UUT -0.0003266 oC Rectangular 1.732 1 -0.0002
Uncert of ref temperature (WTP or ice point): UUT 0.0024999 oC Rectangular 1.732 1 0.0014
Uncert of electrical measuring instrument: UUT 2.5595E-06 oC Normal 2 1 0.0000 ∞
Repeatability 0.00020299 oC Normal 1 1 0.0002 9
Self-heating: UUT 0.00767856 oC Rectangular 1.732 1 0.0044
Combined uncertainty (k=1): oC Normal 1 0.0132
Expanded uncertainty (k=2) (°C): 0.0265
Temperature (°C): 70 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal 0.1 mK Rectangular 1.732 0.001 0.0001
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00073205 oC Rectangular 1.732 1 0.0004
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): ref thermometer 0.00319027 oC Rectangular 1.732 1 0.0018
Uncert of electrical measuring instrument: ref thermometer 1.3157E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.03 oC Rectangular 1.732 1 0.0173
Stability of R(0.01°C) or R(0°C): UUT -0.0004164 oC Rectangular 1.732 1 -0.0002
Uncert of ref temperature (WTP or ice point): UUT 0.00318026 oC Rectangular 1.732 1 0.0018
Uncert of electrical measuring instrument: UUT 3.2628E-06 oC Normal 2 1 0.0000 ∞
Repeatability 8.6705E-05 oC Normal 1 1 0.0001 9
Self-heating: UUT 0.00978844 oC Rectangular 1.732 1 0.0057
Combined uncertainty (k=1): X X Normal 1 0.0189
Expanded uncertainty (k=2) (°C): 0.0378
Temperature (°C): 140 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal -0.1 mK Rectangular 1.732 0.001 -0.0001
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00090647 oC Rectangular 1.732 1 0.0005
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00386595 oC Rectangular 1.732 1 0.0022
Uncert of electrical measuring instrument: ref thermometer 1.6292E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.2 oC Rectangular 1.732 1 0.1155
Stability of R(0.01°C) or R(0°C): UUT -0.0005141 oC Rectangular 1.732 1 -0.0003
Uncert of ref temperature (WTP or ice point): UUT 0.00384356 oC Rectangular 1.732 1 0.0022
Uncert of electrical measuring instrument: UUT 4.0292E-06 oC Normal 2 1 0.0000 ∞
Repeatability 0.0001002 oC Normal 1 1 0.0001 9
Self-heating: UUT 0.01208763 oC Rectangular 1.732 1 0.0070
Combined uncertainty (k=1): X X Normal 1 0.1158
Expanded uncertainty (k=2) (°C): 0.2316
IPRT comparison (-50 °C to 450 °C)
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Temperature (°C): 200 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal -0.5 mK Rectangular 1.732 0.001 -0.0003
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00105915 oC Rectangular 1.732 1 0.0006
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00443355 oC Rectangular 1.732 1 0.0026
Uncert of electrical measuring instrument: ref thermometer 1.9036E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.2 oC Rectangular 1.732 1 0.1155
Stability of R(0.01°C) or R(0°C): UUT -0.0005996 oC Rectangular 1.732 1 -0.0003
Uncert of ref temperature (WTP or ice point): UUT 0.00439926 oC Rectangular 1.732 1 0.0025
Uncert of electrical measuring instrument: UUT 4.6987E-06 oC Normal 2 1 0.0000 ∞
Repeatability 0.00031526 oC Normal 1 1 0.0003 9
Self-heating: UUT 0.01409604 oC Rectangular 1.732 1 0.0081
Combined uncertainty (k=1): X X Normal 1 0.1159
Expanded uncertainty (k=2) (°C): 0.2318
Temperature (°C): 250 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal -0.9 mK Rectangular 1.732 0.001 -0.0005
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00118872 oC Rectangular 1.732 1 0.0007
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0048985 oC Rectangular 1.732 1 0.0028
Uncert of electrical measuring instrument: ref thermometer 2.1365E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.6 oC Rectangular 1.732 1 0.3464
Stability of R(0.01°C) or R(0°C): UUT -0.0006709 oC Rectangular 1.732 1 -0.0004
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Uncert of ref temperature (WTP or ice point): UUT 0.00484609 oC Rectangular 1.732 1 0.0028
Uncert of electrical measuring instrument: UUT 5.2576E-06 oC Normal 2 1 0.0000 ∞
Repeatability 0.00077231 oC Normal 1 1 0.0008 9
Self-heating: UUT 0.01577289 oC Rectangular 1.732 1 0.0091
Combined uncertainty (k=1): X X Normal 1 0.3466
Expanded uncertainty (k=2) (°C): 0.6932
Temperature (°C): 330 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 14 mK Normal 2 0.001 0.0070 ∞
Drift of reference thermometer since last cal -1.6 mK Rectangular 1.732 0.001 -0.0009
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00140073 oC Rectangular 1.732 1 0.0008
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00562731 oC Rectangular 1.732 1 0.0032
Uncert of electrical measuring instrument: ref thermometer 2.5175E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.6 oC Rectangular 1.732 1 0.3464
Stability of R(0.01°C) or R(0°C): UUT -0.0008054 oC Rectangular 1.732 1 -0.0005
Uncert of ref temperature (WTP or ice point): UUT 0.00556457 oC Rectangular 1.732 1 0.0032
Uncert of electrical measuring instrument: UUT 6.3116E-05 oC Normal 2 1 0.0000 ∞
Repeatability 0.00172123 oC Normal 1 1 0.0017 9
Self-heating: UUT 0.01893476 oC Rectangular 1.732 1 0.0109
Combined uncertainty (k=1): X X Normal 1 0.3467
Expanded uncertainty (k=2) (°C): 0.6934
Temperature (°C): 420 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 14 mK Normal 2 0.001 0.0070 ∞
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Drift of reference thermometer since last cal -2.4 mK Rectangular 1.732 0.001 -0.0014
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00164711 oC Rectangular 1.732 1 0.0010
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0064251 oC Rectangular 1.732 1 0.0037
Uncert of electrical measuring instrument: ref thermometer 2.9603E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.6 oC Rectangular 1.732 1 0.3464
Stability of R(0.01°C) or R(0°C): UUT -0.0009472 oC Rectangular 1.732 1 -0.0005
Uncert of ref temperature (WTP or ice point): UUT 0.00635162 oC Rectangular 1.732 1 0.0037
Uncert of electrical measuring instrument: UUT 7.4231E-06 oC Normal 2 1 0.0000 ∞
Repeatability 0.00396014 oC Normal 1 1 0.0040 9
Self-heating: UUT 0.02226931 oC Rectangular 1.732 1 0.0129
Combined uncertainty (k=1): X X Normal 1 0.3468
Expanded uncertainty (k=2) (°C): 0.6936
Temperature (°C): 450 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 14 mK Normal 2 0.001 0.0070 ∞
Drift of reference thermometer since last cal -2.7 mK Rectangular 1.732 0.001 -0.0016
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173136 oC Rectangular 1.732 1 0.0010
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00668579 oC Rectangular 1.732 1 0.0039
Uncert of electrical measuring instrument: ref thermometer 3.1118E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.607 oC Rectangular 1.732 1 0.3505
Stability of R(0.01°C) or R(0°C): UUT -0.0009952 oC Rectangular 1.732 1 -0.0006
Uncert of ref temperature (WTP or ice point): UUT 0.00660551 oC Rectangular 1.732 1 0.0038
Uncert of electrical measuring instrument: UUT 7.7988E-05 oC Normal 2 1 0.0000 ∞
Repeatability 0.000713 oC Normal 1 1 0.0007 9
Self-heating: UUT 0.02339633 oC Rectangular 1.732 1 0.0135
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Combined uncertainty (k=1): X X Normal 1 0.3508
Expanded uncertainty (k=2) (°C): 0.7017
Temperature (°C): 0 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal 0 mK Rectangular 1.732 0.001 0.0000
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -9.926E-05 oC Rectangular 1.732 1 -0.0001
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0024999 oC Rectangular 1.732 1 0.0014
Uncert of electrical measuring instrument: ref thermometer 1.0005E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.02 oC Rectangular 1.732 1 0.0115
Stability of R(0.01°C) or R(0°C): UUT -0.0006478 oC Rectangular 1.732 1 -0.0004
Uncert of ref temperature (WTP or ice point): UUT 0.00249989 oC Rectangular 1.732 1 0.0014
Uncert of electrical measuring instrument: UUT 2.5595E-06 oC Normal 2 1 0.0000 ∞
Repeatability 2.4005E-05 oC Normal 1 1 0.0000 9
Self-heating: UUT 0.00767855 oC Rectangular 1.732 1 0.0044
Combined uncertainty (k=1): oC Normal 1 0.0132
Expanded uncertainty (k=2) (°C): 0.0265
Temperature (°C): 70 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal 0.1 mK Rectangular 1.732 0.001 0.0001
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.0001001 oC Rectangular 1.732 1 -0.0001
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0024999 oC Rectangular 1.732 1 0.0014
Uncert of electrical measuring instrument: ref thermometer 1.0091E-05 oC Normal 2 1 0.0000 ∞
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Temp gradient in bath/furnace (incl stem conduction error) 0.025 oC Rectangular 1.732 1 0.0144
Stability of R(0.01°C) or R(0°C): UUT -0.0008289 oC Rectangular 1.732 1 -0.0005
Uncert of ref temperature (WTP or ice point): UUT 0.00319193 oC Rectangular 1.732 1 0.0018
Uncert of electrical measuring instrument: UUT 3.2748E-06 oC Normal 2 1 0.0000 ∞
Repeatability 6.7773E-05 oC Normal 1 1 0.0001 9
Self-heating: UUT 0.00982436 oC Rectangular 1.732 1 0.0057
Combined uncertainty (k=1): X X Normal 1 0.0163
Expanded uncertainty (k=2) (°C): 0.0325
Temperature (°C): 140 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal -0.1 mK Rectangular 1.732 0.001 -0.0001
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.0001305 oC Rectangular 1.732 1 -0.0001
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00319026 oC Rectangular 1.732 1 0.0018
Uncert of electrical measuring instrument: ref thermometer 1.3157E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.2 oC Rectangular 1.732 1 0.1155
Stability of R(0.01°C) or R(0°C): UUT -0.001026 oC Rectangular 1.732 1 -0.0006
Uncert of ref temperature (WTP or ice point): UUT 0.00386681 oC Rectangular 1.732 1 0.0022
Uncert of electrical measuring instrument: UUT 4.0536E-06 oC Normal 2 1 0.0000 ∞
Repeatability 0.00029014 oC Normal 1 1 0.0003 9
Self-heating: UUT 0.01216075 oC Rectangular 1.732 1 0.0070
Combined uncertainty (k=1): X X Normal 1 0.1158
Expanded uncertainty (k=2) (°C): 0.2316
Temperature (°C): 200 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal -0.5 mK Rectangular 1.732 0.001 -0.0003
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.0001616 oC Rectangular 1.732 1 -0.0001
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00386594 oC Rectangular 1.732 1 0.0022
Uncert of electrical measuring instrument: ref thermometer 1.6292E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.2 oC Rectangular 1.732 1 0.1155
Stability of R(0.01°C) or R(0°C): UUT -0.0011981 oC Rectangular 1.732 1 -0.0007
Uncert of ref temperature (WTP or ice point): UUT 0.00443192 oC Rectangular 1.732 1 0.0026
Uncert of electrical measuring instrument: UUT 4.7336E-06 oC Normal 2 1 0.0000 ∞
Repeatability 0.00025374 oC Normal 1 1 0.0003 9
Self-heating: UUT 0.0142007 oC Rectangular 1.732 1 0.0082
Combined uncertainty (k=1): X X Normal 1 0.1159
Expanded uncertainty (k=2) (°C): 0.2318
Temperature (°C): -50 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal 1.3 mK Rectangular 1.732 0.001 0.0008
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -0.0001001 oC Rectangular 1.732 1 -0.0001
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0024999 oC Rectangular 1.732 1 0.0014
Uncert of electrical measuring instrument: ref thermometer 1.0091E-05 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.03 oC Rectangular 1.732 1 0.0173
Stability of R(0.01°C) or R(0°C): UUT -0.0004997 oC Rectangular 1.732 1 -0.0003
Uncert of ref temperature (WTP or ice point): UUT 0.00199707 oC Rectangular 1.732 1 0.0012
Uncert of electrical measuring instrument: UUT 1.9742E-05 oC Normal 2 1 0.0000 ∞
IPRT comparison (-50 °C to 450 °C)
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Repeatability 0.00013958 oC Normal 1 1 0.0001 9
Self-heating: UUT 0.00592265 oC Rectangular 1.732 1 0.0034
Combined uncertainty (k=1): X X Normal 1 0.0183
Expanded uncertainty (k=2) (°C): 0.0365
Temperature (°C): -20 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal -0.6 mK Rectangular 1.732 0.001 -0.0003
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -7.877E-05 oC Rectangular 1.732 1 0.0000
Uncert of ref temperature (WTP or ice point): ref thermometer 0.00199762 oC Rectangular 1.732 1 0.0012
Uncert of electrical measuring instrument: ref thermometer 7.9397E-06 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.03 oC Rectangular 1.732 1 0.0173
Stability of R(0.01°C) or R(0°C): UUT -0.0005812 oC Rectangular 1.732 1 -0.0003
Uncert of ref temperature (WTP or ice point): UUT 0.00230063 oC Rectangular 1.732 1 0.0013
Uncert of electrical measuring instrument: UUT 2.2963E-06 oC Normal 2 1 0.0000 ∞
Repeatability 4.5025E-05 oC Normal 1 1 0.0000 9
Self-heating: UUT 0.0068888 oC Rectangular 1.732 1 0.0040
Combined uncertainty (k=1): X X Normal 1 0.0184
Expanded uncertainty (k=2) (°C): 0.0367
Temperature (°C): -10 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 8.5 mK Normal 2 0.001 0.0043 ∞
Drift of reference thermometer since last cal -0.5 mK Rectangular 1.732 0.001 -0.0003
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) -9.155E-05 oC Rectangular 1.732 1 -0.0001
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Uncert of ref temperature (WTP or ice point): ref thermometer 0.0022999 oC Rectangular 1.732 1 0.0013
Uncert of electrical measuring instrument: ref thermometer 9.2274E-06 oC Normal 2 1 0.0000 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.022 oC Rectangular 1.732 1 0.0127
Stability of R(0.01°C) or R(0°C): UUT -0.0006081 oC Rectangular 1.732 1 -0.0004
Uncert of ref temperature (WTP or ice point): UUT 0.00239976 oC Rectangular 1.732 1 0.0014
Uncert of electrical measuring instrument: UUT 2.4025E-05 oC Normal 2 1 0.0000 ∞
Repeatability 7.8843E-05 oC Normal 1 1 0.0001 9
Self-heating: UUT 0.00720756 oC Rectangular 1.732 1 0.0042
Combined uncertainty (k=1): X X Normal 1 0.0142
Expanded uncertainty (k=2) (°C): 0.0283
KEBS:
Temperature (°C): 0 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0098 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0115 100
Uncert of electrical measuring instrument: ref thermometer 0.00148157 Ω Normal 2 9.8 0.0073 20
Temp gradient in bath/furnace (incl stem conduction error) 0.00055 ºC Rectangular 1.73205081 1 0.0003 20
Stability of R(0.01°C) or R(0°C): UUT 0.00148 Ω Rectangular 1.73205081 2.5 0.0021 50
Uncert of ref temperature (WTP or ice point): UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 50
Uncert of electrical measuring instrument: UUT 0.025 ºC Rectangular 1.73205081 1 0.0144 ∞
Repeatability 0.00E+00 Ω Normal 1 2.5 0.0000 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Combined uncertainty (k=1): 0.0265
Expanded uncertainty (k=2) (°C): 0.0529
Temperature (°C): 70 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0125 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0017 ºC Rectangular 1.73205081 9.8 0.0123 100
Uncert of electrical measuring instrument: ref thermometer 0.00189072 Ω Normal 2 9.8 0.0093 20
Temp gradient in bath/furnace (incl stem conduction error) 0.00156 ºC Rectangular 1.73205081 1 0.0009 20
Stability of R(0.01°C) or R(0°C): UUT -0.008 Ω Rectangular 1.73205081 2.5 -0.0147 50
Uncert of ref temperature (WTP or ice point): UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 50
Uncert of electrical measuring instrument: UUT 0.025 ºC Rectangular 1.73205081 1 0.0144 ∞
Repeatability 2.34E-04 Ω Normal 1 2.5 0.0006 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0320
Expanded uncertainty (k=2) (°C): 0.0640
Temperature (°C): 140 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0151 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0178 100
Uncert of electrical measuring instrument: ref thermometer 0.00228894 Ω Normal 2 9.8 0.0112 20
IPRT comparison (-50 °C to 450 °C)
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Temp gradient in bath/furnace (incl stem conduction error) 0.0053105 ºC Rectangular 1.73205081 1 0.0031 20
Stability of R(0.01°C) or R(0°C): UUT -0.004 Ω Rectangular 1.73205081 2.5 -0.0058 50
Uncert of ref temperature (WTP or ice point): UUT 0.02 ºC Rectangular 1.73205081 1 0.0177 50
Uncert of electrical measuring instrument: UUT 2.50E-02 ºC Normal 2 1 0.0125 ∞
Repeatability 9.93E-05 Ω Normal 1 2.5 0.0002 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0355
Expanded uncertainty (k=2) (°C): 0.0709
Temperature (°C): 200 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0174 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0017 ºC Rectangular 1.73205081 9.8 0.0171 100
Uncert of electrical measuring instrument: ref thermometer 0.00262776 Ω Normal 2 9.8 0.0129 20
Temp gradient in bath/furnace (incl stem conduction error) 0.00328 ºC Rectangular 1.73205081 1 0.0019 20
Stability of R(0.01°C) or R(0°C): UUT -0.004 Ω Rectangular 1.73205081 2.5 -0.0058 50
Uncert of ref temperature (WTP or ice point): UUT -0.004185 ºC Rectangular 1.73205081 2.5 -0.0060 50
Uncert of electrical measuring instrument: UUT 0.025 ºC Normal 2 1 0.0125 ∞
Repeatability 1.12E-04 Ω Normal 1 2.5 0.0003 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0326
Expanded uncertainty (k=2) (°C): 0.0651
Temperature (°C): 250 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
IPRT comparison (-50 °C to 450 °C)
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distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0192 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0017 ºC Rectangular 1.73205081 9.8 0.0189 100
Uncert of electrical measuring instrument: ref thermometer 0.0029043 Ω Normal 2 9.8 0.0142 20
Temp gradient in bath/furnace (incl stem conduction error) -0.0352925 ºC Rectangular 1.73205081 1 -0.0204 20
Stability of R(0.01°C) or R(0°C): UUT -0.004 Ω Rectangular 1.73205081 2.5 -0.0058 50
Uncert of ref temperature (WTP or ice point): UUT -0.004185 ºC Rectangular 1.73205081 2.5 -0.0060 50
Uncert of electrical measuring instrument: UUT 2.50E-02 ºC Normal 1.73205081 1 0.0144 ∞
Repeatability 5.00E-05 Ω Normal 1 2.5 0.0001 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0411
Expanded uncertainty (k=2) (°C): 0.0823
Temperature (°C): 330 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0220 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0017 ºC Rectangular 1.73205081 9.8 0.0096 100
Uncert of electrical measuring instrument: ref thermometer 0.00333119 Ω Normal 2 9.8 0.0163 20
Temp gradient in bath/furnace (incl stem conduction error) -0.0776025 ºC Rectangular 1.73205081 1 -0.0448 20
Stability of R(0.01°C) or R(0°C): UUT -0.004 Ω Rectangular 1.73205081 2.5 -0.0129 50
Uncert of ref temperature (WTP or ice point): UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 50
Uncert of electrical measuring instrument: UUT 5.50E-02 ºC Normal 1.73205081 1 0.0318 ∞
IPRT comparison (-50 °C to 450 °C)
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Repeatability 9.18E-05 Ω Normal 1 2.5 0.0002 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0650
Expanded uncertainty (k=2) (°C): 0.1301
Temperature (°C): 420 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0252 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0297 100
Uncert of electrical measuring instrument: ref thermometer 0.00380704 Ω Normal 2 9.8 0.0187 20
Temp gradient in bath/furnace (incl stem conduction error) -0.0640694 ºC Rectangular 1.73205081 1 -0.0370 20
Stability of R(0.01°C) or R(0°C): UUT -0.004 Ω Rectangular 1.73205081 2.5 -0.0147 50
Uncert of ref temperature (WTP or ice point): UUT -0.0106508 ºC Rectangular 1.73205081 2.5 -0.0154 50
Uncert of electrical measuring instrument: UUT 0.045 ºC Normal 1.73205081 1 0.0260 ∞
Repeatability 1.05E-04 Ω Normal 1 2.5 0.0003 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0665
Expanded uncertainty (k=2) (°C): 0.1331
Temperature (°C): 450 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.000865 Ω Rectangular 1.73205081 9.8 0.0131 50
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0115 100
Uncert of electrical measuring instrument: ref thermometer 0.00396002 Ω Normal 2 9.8 0.0194 20
Temp gradient in bath/furnace (incl stem conduction error) -0.0764689 ºC Rectangular 1.73205081 1 -0.0441 20
Stability of R(0.01°C) or R(0°C): UUT -0.004185 Ω Rectangular 1.73205081 2.5 -0.0060 50
Uncert of ref temperature (WTP or ice point): UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 50
Uncert of electrical measuring instrument: UUT 0.045 ºC Normal 2 2.5 0.0563 ∞
Repeatability 1.23E-04 Ω Normal 1 2.5 0.0003 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0777
Expanded uncertainty (k=2) (°C): 0.1554
Temperature (°C): 0 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0098 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0115 100
Uncert of electrical measuring instrument: ref thermometer 0.00148148 Ω Normal 2 9.8 0.0073 20
Temp gradient in bath/furnace (incl stem conduction error) -0.0044 ºC Rectangular 1.73205081 1 -0.0025 20
Stability of R(0.01°C) or R(0°C): UUT -0.0048 Ω Rectangular 1.73205081 2.5 -0.0069 50
Uncert of ref temperature (WTP or ice point): UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 50
Uncert of electrical measuring instrument: UUT 0.025 ºC Rectangular 1.73205081 1 0.0144 ∞
Repeatability 0.00E+00 Ω Normal 1 2.5 0.0000 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0274
Expanded uncertainty (k=2) (°C): 0.0548
IPRT comparison (-50 °C to 450 °C)
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Temperature (°C): 70 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0125 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0147 100
Uncert of electrical measuring instrument: ref thermometer 0.00189075 Ω Normal 2 9.8 0.0093 20
Temp gradient in bath/furnace (incl stem conduction error) 0.00103126 ºC Rectangular 1.73205081 1 0.0006 20
Stability of R(0.01°C) or R(0°C): UUT -0.00837 Ω Rectangular 1.73205081 2.5 -0.0121 50
Uncert of ref temperature (WTP or ice point): UUT -0.00837 ºC Rectangular 1.73205081 2.5 -0.0121 50
Uncert of electrical measuring instrument: UUT 0.025 ºC Normal 2 1 0.0125 ∞
Repeatability 1.64E-04 Ω Normal 1 2.5 0.0004 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0313
Expanded uncertainty (k=2) (°C): 0.0626
Temperature (°C): 140 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0151 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0178 100
Uncert of electrical measuring instrument: ref thermometer 0.00228884 Ω Normal 2 9.8 0.0112 20
Temp gradient in bath/furnace (incl stem conduction error) 0.00414 ºC Rectangular 1.73205081 1 0.0024 20
Stability of R(0.01°C) or R(0°C): UUT -0.00837 Ω Rectangular 1.73205081 2.5 -0.0121 50
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): UUT -0.00837 ºC Rectangular 1.73205081 2.5 -0.0121 50
Uncert of electrical measuring instrument: UUT 2.50E-02 ºC Normal 2 1 0.0125 ∞
Repeatability 6.88E-05 Ω Normal 1 2.5 0.0002 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0346
Expanded uncertainty (k=2) (°C): 0.0692
Temperature (°C): 200 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0174 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0205 100
Uncert of electrical measuring instrument: ref thermometer 0.00262736 Ω Normal 2 9.8 0.0129 20
Temp gradient in bath/furnace (incl stem conduction error) 0.003085 ºC Rectangular 1.73205081 1 0.0018 20
Stability of R(0.01°C) or R(0°C): UUT -0.00837 Ω Rectangular 1.73205081 2.5 -0.0121 50
Uncert of ref temperature (WTP or ice point): UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 50
Uncert of electrical measuring instrument: UUT 0.025 ºC Normal 2 1 0.0125 ∞
Repeatability 3.11E-04 Ω Normal 1 2.5 0.0008 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0374
Expanded uncertainty (k=2) (°C): 0.0748
Temperature (°C): -10 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 1.50E-02 ºC Normal 2 1 0.0075 20
IPRT comparison (-50 °C to 450 °C)
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Drift of reference thermometer since last cal 6.96E-04 Ω Rectangular 1.73205081 9.8 0.0039 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00173 Ω Rectangular 1.73205081 9.8 0.0094 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.02 ºC Rectangular 1.73205081 1 0.0055 100
Uncert of electrical measuring instrument: ref thermometer 0.00141845 Ω Normal 2 9.8 0.0070 20
Temp gradient in bath/furnace (incl stem conduction error) 0.004567 ºC Rectangular 1.73205081 1 0.0026 20
Stability of R(0.01°C) or R(0°C): UUT -0.00837 Ω Rectangular 1.73205081 2.5 -0.0121 50
Uncert of ref temperature (WTP or ice point): UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 50
Uncert of electrical measuring instrument: UUT 0.025 ºC Normal 1.73205081 1 0.0144 ∞
Repeatability 2.16E-04 Ω Normal 1 2.5 0.0005 20
Self-heating: UUT 0.00032 Ω Normal 1.73205081 2.5 0.0005 50
Combined uncertainty (k=1): 0.0271
Expanded uncertainty (k=2) (°C): 0.0542
NIMT:
Temperature (°C): 0 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00007 Ω normal 1 2.6 0.0002 26
Repeatability: UUT 0.0001 Ω normal 1 2.6 0.0003 26
Repeatability: ref thermometer 0.00024 °C normal 1 1 0.0002 26
Calibration of reference thermometer 0.001 °C normal 2 1 0.0005 ∞
Drift of reference thermometer since last cal 0.005 °C rectangular SQRT(3) 1 0.0029 ∞
Uncert of electrical measuring instrument 0.0003 Ω normal 2 2.6 0.0004 ∞
Drift of electrical measuring instrument 0.001 Ω rectangular SQRT(3) 2.6 0.0015 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00179 Ω rectangular 2SQRT(3) 2.6 0.0013 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.001 °C rectangular SQRT(3) 1 0.0006 ∞
IPRT comparison (-50 °C to 450 °C)
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Instability of bath 0.003 °C rectangular SQRT(3) 1 0.0017 ∞
Interpolation function 0.00417 Ω rectangular SQRT(3) 2.6 0.0061 ∞
Combined uncertainty (k=1): normal 0.0070
Expanded uncertainty (k=2) (°C): 0.0140
Temperature (°C): 70 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00016 Ω normal 1 2.6 0.0004 26
Repeatability: UUT 0.00009 Ω normal 1 2.6 0.0002 26
Repeatability: ref thermometer 0.0004 °C normal 1 1 0.0004 26
Calibration of reference thermometer 0.002 °C normal 2 1 0.0010 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0004 Ω normal 2 2.6 0.0005 ∞
Drift of electrical measuring instrument 0.0013 Ω rectangular SQRT(3) 2.6 0.0019 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00179 Ω rectangular 2SQRT(3) 2.6 0.0013 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.0073 Ω rectangular SQRT(3) 2.6 0.0110 ∞
Combined uncertainty (k=1): normal 0.0110
Expanded uncertainty (k=2) (°C): 0.0220
Temperature (°C): 140 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00009 Ω normal 1 2.7 0.0002 26
Repeatability: UUT 0.00008 Ω normal 1 2.7 0.0002 26
Repeatability: ref thermometer 0.0003 °C normal 1 1 0.0003 26
IPRT comparison (-50 °C to 450 °C)
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Calibration of reference thermometer 0.002 °C normal 2 1 0.0010 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0005 Ω normal 2 2.7 0.0006 ∞
Drift of electrical measuring instrument 0.0015 Ω rectangular SQRT(3) 2.7 0.0024 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00179 Ω rectangular 2SQRT(3) 2.7 0.0014 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.00546 Ω rectangular SQRT(3) 2.7 0.0084 ∞
Combined uncertainty (k=1): normal 0.0090
Expanded uncertainty (k=2) (°C): 0.0180
Temperature (°C): 200 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00011 Ω normal 1 2.7 0.0003 26
Repeatability: UUT 0.00007 Ω normal 1 2.7 0.0002 26
Repeatability: ref thermometer 0.0003 °C normal 1 1 0.0003 26
Calibration of reference thermometer 0.002 °C normal 2 1 0.0010 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0005 Ω normal 2 2.7 0.0007 ∞
Drift of electrical measuring instrument 0.0018 Ω rectangular SQRT(3) 2.7 0.0028 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00179 Ω rectangular 2SQRT(3) 2.7 0.0014 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.001 °C rectangular SQRT(3) 1 0.0006 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.00069 Ω rectangular SQRT(3) 2.7 0.0011 ∞
Combined uncertainty (k=1): normal 0.0040
Expanded uncertainty (k=2) (°C): 0.0080
IPRT comparison (-50 °C to 450 °C)
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Temperature (°C): 250 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00015 Ω normal 1 2.8 0.0004 26
Repeatability: UUT 0.00018 Ω normal 1 2.8 0.0005 26
Repeatability: ref thermometer 0.0003 °C normal 1 1 0.0003 26
Calibration of reference thermometer 0.004 °C normal 2 1 0.0020 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0006 Ω normal 2 2.8 0.0008 ∞
Drift of electrical measuring instrument 0.0019 Ω rectangular SQRT(3) 2.8 0.0031 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00179 Ω rectangular 2SQRT(3) 2.8 0.0014 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.001 °C rectangular SQRT(3) 1 0.0006 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.00391 Ω rectangular SQRT(3) 2.8 0.0062 ∞
Combined uncertainty (k=1): normal 0.0080
Expanded uncertainty (k=2) (°C): 0.0160
Temperature (°C): 330 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00116 Ω normal 1 2.8 0.0033 26
Repeatability: UUT 0.0011 Ω normal 1 2.8 0.0031 26
Repeatability: ref thermometer 0.0019 °C normal 1 1 0.0019 26
Calibration of reference thermometer 0.004 °C normal 2 1 0.0020 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0007 Ω normal 2 2.8 0.0009 ∞
Drift of electrical measuring instrument 0.0022 Ω rectangular SQRT(3) 2.8 0.0036 ∞
IPRT comparison (-50 °C to 450 °C)
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Stability of R(0.01°C) or R(0°C): UUT 0.00179 Ω rectangular 2SQRT(3) 2.8 0.0015 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.005 °C rectangular SQRT(3) 1 0.0029 ∞
Instability of bath 0.008 °C rectangular SQRT(3) 1 0.0046 ∞
Interpolation function 0.00428 Ω rectangular SQRT(3) 2.8 0.0070 ∞
Combined uncertainty (k=1): normal 0.0110
Expanded uncertainty (k=2) (°C): 0.0220
Temperature (°C): 420 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00278 Ω normal 1 2.9 0.0081 26
Repeatability: UUT 0.00291 Ω normal 1 2.9 0.0085 26
Repeatability: ref thermometer 0.0021 °C normal 1 1 0.0021 26
Calibration of reference thermometer 0.008 °C normal 2 1 0.0040 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0008 Ω normal 2 2.9 0.0011 ∞
Drift of electrical measuring instrument 0.0025 Ω rectangular SQRT(3) 2.9 0.0043 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00179 Ω rectangular 2SQRT(3) 2.9 0.0015 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.01 °C rectangular SQRT(3) 1 0.0058 ∞
Instability of bath 0.011 °C rectangular SQRT(3) 1 0.0064 ∞
Interpolation function 0.0025 Ω rectangular SQRT(3) 2.9 0.0042 ∞
Combined uncertainty (k=1): normal 0.0160
Expanded uncertainty (k=2) (°C): 0.0320
Temperature (°C): 450 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.0018 Ω normal 1 2.9 0.0053 26
IPRT comparison (-50 °C to 450 °C)
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Repeatability: UUT 0.00197 Ω normal 1 2.9 0.0058 26
Repeatability: ref thermometer 0.0042 °C normal 1 1 0.0042 26
Calibration of reference thermometer 0.008 °C normal 2 1 0.0040 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0008 Ω normal 2 2.9 0.0012 ∞
Drift of electrical measuring instrument 0.00265 Ω rectangular SQRT(3) 2.9 0.0045 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00179 Ω rectangular 2SQRT(3) 2.9 0.0015 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.01 °C rectangular SQRT(3) 1 0.0058 ∞
Instability of bath 0.011 °C rectangular SQRT(3) 1 0.0064 ∞
Interpolation function 0.0051 Ω rectangular SQRT(3) 2.9 0.0087 ∞
Combined uncertainty (k=1): normal 0.0160
Expanded uncertainty (k=2) (°C): 0.0320
Temperature (°C): 0 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00004 Ω normal 1 2.5 0.0001 26
Repeatability: UUT 0.00012 Ω normal 1 2.5 0.0003 26
Repeatability: ref thermometer 0.00026 °C normal 1 1 0.0003 26
Calibration of reference thermometer 0.001 °C normal 2 1 0.0005 ∞
Drift of reference thermometer since last cal 0.005 °C rectangular SQRT(3) 1 0.0029 ∞
Uncert of electrical measuring instrument 0.0003 Ω normal 2 2.5 0.0004 ∞
Drift of electrical measuring instrument 0.001 Ω rectangular SQRT(3) 2.5 0.0014 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00294 Ω rectangular 2SQRT(3) 2.5 0.0021 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.001 °C rectangular SQRT(3) 1 0.0006 ∞
Instability of bath 0.003 °C rectangular SQRT(3) 1 0.0017 ∞
Interpolation function 0.00102 Ω rectangular SQRT(3) 2.5 0.0015 ∞
IPRT comparison (-50 °C to 450 °C)
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Combined uncertainty (k=1): normal 0.0050
Expanded uncertainty (k=2) (°C): 0.0100
Temperature (°C): 70 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00031 Ω normal 1 2.6 0.0008 26
Repeatability: UUT 0.00019 Ω normal 1 2.6 0.0005 26
Repeatability: ref thermometer 0.0006 °C normal 1 1 0.0006 26
Calibration of reference thermometer 0.002 °C normal 2 1 0.0010 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0004 Ω normal 2 2.6 0.0005 ∞
Drift of electrical measuring instrument 0.0013 Ω rectangular SQRT(3) 2.6 0.0019 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00294 Ω rectangular 2SQRT(3) 2.6 0.0022 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.00083 Ω rectangular SQRT(3) 2.6 0.0012 ∞
Combined uncertainty (k=1): normal 0.0040
Expanded uncertainty (k=2) (°C): 0.0080
Temperature (°C): 140 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.0001 Ω normal 1 2.6 0.0003 26
Repeatability: UUT 0.00008 Ω normal 1 2.6 0.0002 26
Repeatability: ref thermometer 0.0002 °C normal 1 1 0.0002 26
Calibration of reference thermometer 0.002 °C normal 2 1 0.0010 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
IPRT comparison (-50 °C to 450 °C)
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Uncert of electrical measuring instrument 0.0005 Ω normal 2 2.6 0.0006 ∞
Drift of electrical measuring instrument 0.0015 Ω rectangular SQRT(3) 2.6 0.0023 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00294 Ω rectangular 2SQRT(3) 2.6 0.0022 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.001 Ω rectangular SQRT(3) 2.6 0.0015 ∞
Combined uncertainty (k=1): normal 0.0040
Expanded uncertainty (k=2) (°C): 0.0080
Temperature (°C): 200 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.0001 Ω normal 1 2.7 0.0003 26
Repeatability: UUT 0.00012 Ω normal 1 2.7 0.0003 26
Repeatability: ref thermometer 0.0004 °C normal 1 1 0.0004 26
Calibration of reference thermometer 0.002 °C normal 2 1 0.0010 ∞
Drift of reference thermometer since last cal 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Uncert of electrical measuring instrument 0.0005 Ω normal 2 2.7 0.0007 ∞
Drift of electrical measuring instrument 0.00177 Ω rectangular SQRT(3) 2.7 0.0027 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00294 Ω rectangular 2SQRT(3) 2.7 0.0023 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.001 °C rectangular SQRT(3) 1 0.0006 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.00039 Ω rectangular SQRT(3) 2.7 0.0006 ∞
Combined uncertainty (k=1): normal 0.0040
Expanded uncertainty (k=2) (°C): 0.0080
Temperature (°C): -50 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
IPRT comparison (-50 °C to 450 °C)
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distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00024 Ω normal 1 2.5 0.0006 26
Repeatability: UUT 0.00017 Ω normal 1 2.5 0.0004 26
Repeatability: ref thermometer 0.0003 °C normal 1 1 0.0003 26
Calibration of reference thermometer 0.001 °C normal 2 1 0.0005 ∞
Drift of reference thermometer since last cal 0.005 °C rectangular SQRT(3) 1 0.0029 ∞
Uncert of electrical measuring instrument 0.0002 Ω normal 2 2.5 0.0003 ∞
Drift of electrical measuring instrument 0.0008 Ω rectangular SQRT(3) 2.5 0.0011 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00294 Ω rectangular 2SQRT(3) 2.5 0.0021 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.00002 Ω rectangular SQRT(3) 2.5 0.0000 ∞
Combined uncertainty (k=1): normal 0.0040
Expanded uncertainty (k=2) (°C): 0.0080
Temperature (°C): -20 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.0001 Ω normal 1 2.5 0.0002 26
Repeatability: UUT 0.0001 Ω normal 1 2.5 0.0003 26
Repeatability: ref thermometer 0.0002 °C normal 1 1 0.0002 26
Calibration of reference thermometer 0.001 °C normal 2 1 0.0005 ∞
Drift of reference thermometer since last cal 0.005 °C rectangular SQRT(3) 1 0.0029 ∞
Uncert of electrical measuring instrument 0.0003 Ω normal 2 2.5 0.0003 ∞
Drift of electrical measuring instrument 0.0009 Ω rectangular SQRT(3) 2.5 0.0013 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00294 Ω rectangular 2SQRT(3) 2.5 0.0021 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
IPRT comparison (-50 °C to 450 °C)
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Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.00036 Ω rectangular SQRT(3) 2.5 0.0005 ∞
Combined uncertainty (k=1): normal 0.0040
Expanded uncertainty (k=2) (°C): 0.0080
Temperature (°C): -10 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Curve fit residuals: UUT 0.00006 Ω normal 1 2.5 0.0002 26
Repeatability: UUT 0.00006 Ω normal 1 2.5 0.0002 26
Repeatability: ref thermometer 0.0002 °C normal 1 1 0.0002 26
Calibration of reference thermometer 0.001 °C normal 2 1 0.0005 ∞
Drift of reference thermometer since last cal 0.005 °C rectangular SQRT(3) 1 0.0029 ∞
Uncert of electrical measuring instrument 0.0003 Ω normal 2 2.5 0.0004 ∞
Drift of electrical measuring instrument 0.001 Ω rectangular SQRT(3) 2.5 0.0014 ∞
Stability of R(0.01°C) or R(0°C): UUT 0.00294 Ω rectangular 2SQRT(3) 2.5 0.0021 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Instability of bath 0.002 °C rectangular SQRT(3) 1 0.0012 ∞
Interpolation function 0.00028 Ω rectangular SQRT(3) 2.5 0.0004 ∞
Combined uncertainty (k=1): normal 0.0040
Expanded uncertainty (k=2) (°C): 0.0080
UNBS:
Temperature (°C): 0 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
IPRT comparison (-50 °C to 450 °C)
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Drift of reference thermometer since last cal 8.37E-03 Ω Rectangular 1.732050808 2.56 0.0124 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.56 0.0021 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.56 0.0184 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.56 0.0137 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.0037 Ω Rectangular 1.73205081 2.56 0.0055 50
Uncert of ref temperature (WTP or ice point): UUT 0.00095 Ω Rectangular 1.73205081 2.56 0.0014 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 1.35E-01 Ω Normal 1 2.56 0.0000 20
Ambient conditions 0.01 Ω Normal 2 2.56 0.0128 50
Combined uncertainty (k=1): 0.3311
Expanded uncertainty (k=2) (°C): 0.6622
Temperature (°C): 70 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 3.09E-01 Ω Rectangular 1.732050808 2.61 0.4656 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.61 0.0021 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.61 0.0188 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.61 0.0139 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.0037 Ω Rectangular 1.73205081 2.61 0.0056 50
Uncert of ref temperature (WTP or ice point): UUT 0.00095 Ω Rectangular 1.73205081 2.61 0.0014 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 0.00E+00 Ω Normal 1 2.61 0.0004 20
Ambient conditions 0.01 Ω Normal 2 2.61 0.0131 50
IPRT comparison (-50 °C to 450 °C)
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Combined uncertainty (k=1): 0.5712
Expanded uncertainty (k=2) (°C): 1.1424
Temperature (°C): 140 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 1.37E-01 Ω Rectangular 1.732050808 2.675 0.2116 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.675 0.0022 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.675 0.0193 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.675 0.0143 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.0037 Ω Rectangular 1.73205081 2.675 0.0057 50
Uncert of ref temperature (WTP or ice point): UUT 0.00095 Ω Rectangular 1.73205081 2.675 0.0015 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 0.00E+00 Ω Normal 1 2.675 0.0008 20
Ambient conditions 0.01 Ω Normal 2 2.675 0.0134 50
Combined uncertainty (k=1): 0.3928
Expanded uncertainty (k=2) (°C): 0.7856
Temperature (°C): 200 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 5.00E-02 Ω Rectangular 1.732050808 2.726 0.0787 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.726 0.0022 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.726 0.0196 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.726 0.0146 20
IPRT comparison (-50 °C to 450 °C)
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Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.0037 Ω Rectangular 1.73205081 2.726 0.0058 50
Uncert of ref temperature (WTP or ice point): UUT 0.00095 Ω Rectangular 1.73205081 2.726 0.0015 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 0.00E+00 Ω Normal 1 2.726 0.0000 20
Ambient conditions 0.01 Ω Normal 2 2.726 0.0136 50
Combined uncertainty (k=1): 0.3402
Expanded uncertainty (k=2) (°C): 0.6805
Temperature (°C): 250 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 1.35E-01 Ω Rectangular 1.732050808 2.769 0.2158 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.769 0.0022 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.769 0.0199 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.769 0.0148 20
Temp gradient in bath/furnace (incl stem conduction error) 0.3 ºC Rectangular 1.73205081 1 0.1732 20
Stability of R(0.01°C) or R(0°C): UUT 0.0037 Ω Rectangular 1.73205081 2.769 0.0059 50
Uncert of ref temperature (WTP or ice point): UUT 0.00095 Ω Rectangular 1.73205081 2.769 0.0015 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 8.37E-03 Ω Normal 1 2.769 0.0007 20
Ambient conditions 0.01 Ω Normal 2 2.769 0.0138 50
Combined uncertainty (k=1): 0.2790
Expanded uncertainty (k=2) (°C): 0.5581
Temperature (°C): 0 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
IPRT comparison (-50 °C to 450 °C)
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distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 8.37E-03 Ω Rectangular 1.732050808 2.56 0.0124 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.56 0.0021 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.56 0.0184 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.56 0.0137 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.142 Ω Rectangular 1.73205081 2.56 0.2099 50
Uncert of ref temperature (WTP or ice point): UUT 0.015 Ω Rectangular 1.73205081 2.56 0.0222 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 0.00E+00 Ω Normal 1 2.56 0.0003 20
Ambient conditions 0.01 Ω Normal 2 2.56 0.0128 50
Combined uncertainty (k=1): 0.3926
Expanded uncertainty (k=2) (°C): 0.7852
Temperature (°C): 70 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 3.09E-01 Ω Rectangular 1.732050808 2.61 0.4656 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.61 0.0021 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.61 0.0188 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.61 0.0139 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.142 Ω Rectangular 1.73205081 2.61 0.2140 50
Uncert of ref temperature (WTP or ice point): UUT 0.015 Ω Rectangular 1.73205081 2.61 0.0226 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
IPRT comparison (-50 °C to 450 °C)
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Repeatability 0.00E+00 Ω Normal 1 2.61 0.0000 20
Ambient conditions 0.01 Ω Normal 2 2.61 0.0131 50
Combined uncertainty (k=1): 0.6103
Expanded uncertainty (k=2) (°C): 1.2207
Temperature (°C): 140 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 1.37E-01 Ω Rectangular 1.732050808 2.675 0.2116 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.675 0.0022 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.675 0.0193 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.675 0.0143 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.142 Ω Rectangular 1.73205081 2.675 0.2193 50
Uncert of ref temperature (WTP or ice point): UUT 0.015 Ω Rectangular 1.73205081 2.675 0.0232 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 0.00E+00 Ω Normal 1 2.675 0.0000 20
Ambient conditions 0.01 Ω Normal 2 2.675 0.0134 50
Combined uncertainty (k=1): 0.4504
Expanded uncertainty (k=2) (°C): 0.9009
Temperature (°C): 200 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 5.00E-02 Ω Rectangular 1.732050808 2.726 0.0787 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.726 0.0022 50
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 Ω Rectangular 1.732050808 2.726 0.0196 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.726 0.0146 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.142 Ω Rectangular 1.73205081 2.726 0.2235 50
Uncert of ref temperature (WTP or ice point): UUT 0.015 Ω Rectangular 1.73205081 2.726 0.0236 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 1.00E-04 Ω Normal 1 2.726 0.0003 20
Ambient conditions 0.01 Ω Normal 2 2.726 0.0136 50
Combined uncertainty (k=1): 0.4077
Expanded uncertainty (k=2) (°C): 0.8154
Temperature (°C): -20 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 2.02E-02 Ω Rectangular 1.732050808 2.548 0.0297 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.548 0.0021 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 ºC Rectangular 1.732050808 2.548 0.0183 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.548 0.0136 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.142 Ω Rectangular 1.73205081 2.548 0.2089 50
Uncert of ref temperature (WTP or ice point): UUT 0.015 ºC Rectangular 1.73205081 2.548 0.0221 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 2.00E-04 Ω Normal 1 2.548 0.0005 20
Ambient conditions 0.01 Ω Normal 2 2.548 0.0127 50
Combined uncertainty (k=1): 0.3930
Expanded uncertainty (k=2) (°C): 0.7859
IPRT comparison (-50 °C to 450 °C)
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Temperature (°C): -10 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 3.50E-02 ºC Normal 2 1 0.0175 20
Drift of reference thermometer since last cal 4.12E-02 Ω Rectangular 1.732050808 2.548 0.0606 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.00139853 Ω Rectangular 1.732050808 2.548 0.0021 50
Uncert of ref temperature (WTP or ice point): ref thermometer 0.012473 ºC Rectangular 1.732050808 2.548 0.0183 100
Uncert of electrical measuring instrument: ref thermometer 0.010677 Ω Normal 2 2.548 0.0136 20
Temp gradient in bath/furnace (incl stem conduction error) 0.57 ºC Rectangular 1.73205081 1 0.3291 20
Stability of R(0.01°C) or R(0°C): UUT 0.142 Ω Rectangular 1.73205081 2.548 0.2089 50
Uncert of ref temperature (WTP or ice point): UUT 0.015 ºC Rectangular 1.73205081 2.548 0.0221 50
Uncert of electrical measuring instrument: UUT 0.02 ºC Rectangular 1.73205081 1 0.0115 ∞
Repeatability 1.00E-04 Ω Normal 1 2.548 0.0003 20
Ambient conditions 0.01 Ω Normal 2 2.548 0.0127 50
Combined uncertainty (k=1): 0.3965
Expanded uncertainty (k=2) (°C): 0.7930
TBS:
Temperature (°C): 0 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
IPRT comparison (-50 °C to 450 °C)
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Temp gradient in bath/furnace (incl stem conduction error) 0.029 ºC Rectangular 1.732 1 0.0167 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0065 ºC Normal 1 1 0.0065
Other (please specify)
Combined uncertainty (k=1): 0.0201
Expanded uncertainty (k=2) (°C): 0.0401
Temperature (°C): 70 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.035 ºC Rectangular 1.732 1 0.0202 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.006 ºC Normal 1 1 0.0060
Other (please specify)
Combined uncertainty (k=1): 0.0229
Expanded uncertainty (k=2) (°C): 0.0458
Temperature (°C): 140 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
IPRT comparison (-50 °C to 450 °C)
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distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.033 ºC Rectangular 1.732 1 0.0191 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.005 ºC Normal 1 1 0.0050
Other (please specify)
Combined uncertainty (k=1): 0.0216
Expanded uncertainty (k=2) (°C): 0.0432
Temperature (°C): 200 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.035 ºC Rectangular 1.732 1 0.0202 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
IPRT comparison (-50 °C to 450 °C)
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Repeatability 0.0057 ºC Normal 1 1 0.0057
Other (please specify)
Combined uncertainty (k=1): 0.0228
Expanded uncertainty (k=2) (°C): 0.0456
Temperature (°C): 250 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 ºC Normal 2 1 0.0050
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.038 ºC Rectangular 1.732 1 0.0219 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0065 ºC Normal 1 1 0.0065
Other (please specify)
Combined uncertainty (k=1): 0.0249
Expanded uncertainty (k=2) (°C): 0.0499
Temperature (°C): 330 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 ºC Normal 2 1 0.0050
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.044 ºC Rectangular 1.732 1 0.0254 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0067 ºC Normal 1 1 0.0067
Other (please specify)
Combined uncertainty (k=1): 0.0281
Expanded uncertainty (k=2) (°C): 0.0562
Temperature (°C): 420 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 ºC Normal 2 1 0.0050
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.05 ºC Rectangular 1.732 1 0.0289 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0075 ºC Normal 1 1 0.0075
Other (please specify)
Combined uncertainty (k=1): 0.0314
Expanded uncertainty (k=2) (°C): 0.0629
IPRT comparison (-50 °C to 450 °C)
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Temperature (°C): 450 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 ºC Normal 2 1 0.0050
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.065 ºC Rectangular 1.732 1 0.0375 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0075 ºC Normal 1 1 0.0075
Other (please specify)
Combined uncertainty (k=1): 0.0395
Expanded uncertainty (k=2) (°C): 0.0791
Temperature (°C): 0 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.029 ºC Rectangular 1.732 1 0.0167 ∞
Stability of R(0.01°C) or R(0°C): UUT
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0065 ºC Normal 1 1 0.0065
Other (please specify)
Combined uncertainty (k=1): 0.0201
Expanded uncertainty (k=2) (°C): 0.0401
Temperature (°C): 70 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.035 ºC Rectangular 1.732 1 0.0202 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.006 ºC Normal 1 1 0.0060
Other (please specify)
Combined uncertainty (k=1): 0.0229
Expanded uncertainty (k=2) (°C): 0.0458
Temperature (°C): 140 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
IPRT comparison (-50 °C to 450 °C)
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Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.033 ºC Rectangular 1.732 1 0.0191 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.005 ºC Normal 1 1 0.0050
Other (please specify)
Combined uncertainty (k=1): 0.0216
Expanded uncertainty (k=2) (°C): 0.0432
Temperature (°C): 200 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.035 ºC Rectangular 1.732 1 0.0202 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0057 ºC Normal 1 1 0.0057
Other (please specify)
IPRT comparison (-50 °C to 450 °C)
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Combined uncertainty (k=1): 0.0228
Expanded uncertainty (k=2) (°C): 0.0456
Temperature (°C): -50 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.045 ºC Rectangular 1.732 1 0.0260 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0065 ºC Normal 1 1 0.0065
Other (please specify)
Combined uncertainty (k=1): 0.0282
Expanded uncertainty (k=2) (°C): 0.0565
Temperature (°C): -20 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
IPRT comparison (-50 °C to 450 °C)
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Temp gradient in bath/furnace (incl stem conduction error) 0.035 ºC Rectangular 1.732 1 0.0202 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.0057 ºC Normal 1 1 0.0057
Other (please specify)
Combined uncertainty (k=1): 0.0228
Expanded uncertainty (k=2) (°C): 0.0456
Temperature (°C): -10 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.005 ºC Normal 2 1 0.0025
Drift of reference thermometer since last cal 0.005 ºC Rectangular 1.732 1 0.0029 ∞
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.0005 Ω Rectangular 1.732 0.1011 0.0000 ∞
Uncert of ref temperature (WTP or ice point): ref thermometer 0.01 ºC Normal 2 1 0.0050 ∞
Uncert of electrical measuring instrument: ref thermometer 0.002 Ω Normal 2 2.5641 0.0026 ∞
Temp gradient in bath/furnace (incl stem conduction error) 0.03 ºC Rectangular 1.732 1 0.0173 ∞
Stability of R(0.01°C) or R(0°C): UUT
Uncert of ref temperature (WTP or ice point): UUT 0.01 ºC Rectangular 1.732 1 0.0058
Uncert of electrical measuring instrument: UUT 0 0.0000
Repeatability 0.006 ºC Normal 1 1 0.0060
Other (please specify)
Combined uncertainty (k=1): 0.0204
Expanded uncertainty (k=2) (°C): 0.0408
MSB:
IPRT comparison (-50 °C to 450 °C)
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Temperature (°C): 0 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.006 °C Normal 2 1 0.0030 200
Drift of reference thermometer since last cal 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.029 °C Rectangular 1.732050808 1 0.0167 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.006 °C Normal 2 1 0.0030 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.001 °C Rectangular 1.732050808 1 0.0006 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.000289 °C Rectangular 1.732050808 1 0.0002 200
Other (please specify)
Combined uncertainty (k=1): 0.0208
Expanded uncertainty (k=2) (°C): 0.0416
Temperature (°C): 70 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 °C Normal 2 1 0.0050 200
Drift of reference thermometer since last cal 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.037 °C Rectangular 1.732050808 1 0.0214 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0077 °C Normal 2 1 0.0039 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.005 °C Rectangular 1.732050808 1 0.0029 200
Stability of R(0.01°C) or R(0°C): UUT 200
IPRT comparison (-50 °C to 450 °C)
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Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.000289 °C Rectangular 1.732050808 1 0.0002 200
Other (please specify)
Combined uncertainty (k=1): 0.0253
Expanded uncertainty (k=2) (°C): 0.0505
Temperature (°C): 140 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
Source of uncertainty distribution (°C / unit) contribution (k=1) (°C) freedom
0.01 °C Normal 2 1 0.0050 200
Drift of reference thermometer since last cal 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.045 °C Rectangular 1.732050808 1 0.0260 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0093 °C Normal 2 1 0.0047 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.000289 °C Rectangular 1.732050808 1 0.0002 200
Other (please specify)
Combined uncertainty (k=1): 0.0281
Expanded uncertainty (k=2) (°C): 0.0562
Temperature (°C): 200 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 °C Normal 2 1 0.0050 200
IPRT comparison (-50 °C to 450 °C)
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Drift of reference thermometer since last cal 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.052 °C Rectangular 1.732050808 1 0.0300 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0107 °C Normal 2 1 0.0054 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.000289 °C Rectangular 1.732050808 1 0.0002 200
Other (please specify)
Combined uncertainty (k=1): 0.0335
Expanded uncertainty (k=2) (°C): 0.0670
Temperature (°C): 250 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 °C Normal 2 1 0.0050 200
Drift of reference thermometer since last cal 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.057 °C Rectangular 1.732050808 1 0.0329 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0117 °C Normal 2 1 0.0059 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.000289 °C Rectangular 1.732050808 1 0.0002 200
Other (please specify)
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
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Combined uncertainty (k=1): 0.0362
Expanded uncertainty (k=2) (°C): 0.0724
Temperature (°C): 330 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.02 °C Normal 2 1 0.0100 200
Drift of reference thermometer since last cal 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.065 °C Rectangular 1.732050808 1 0.0375 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0135 °C Normal 2 1 0.0068 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.000289 °C Rectangular 1.732050808 1 0.0002 200
Other (please specify)
Combined uncertainty (k=1): 0.0415
Expanded uncertainty (k=2) (°C): 0.0830
Temperature (°C): 420 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.02 °C Normal 2 1 0.0100 200
Drift of reference thermometer since last cal 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.075 °C Rectangular 1.732050808 1 0.0433 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0154 °C Normal 2 1 0.0077 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 121 of 125
Temp gradient in bath/furnace (incl stem conduction error) 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.000289 °C Rectangular 1.732050808 1 0.0002 200
Other (please specify)
Combined uncertainty (k=1): 0.0469
Expanded uncertainty (k=2) (°C): 0.0938
Temperature (°C): 450 °C, UUT (612)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.035 °C Normal 2 1 0.0175 200
Drift of reference thermometer since last cal 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.078 °C Rectangular 1.732050808 1 0.0450 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0161 °C Normal 2 1 0.0081 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.000289 °C Rectangular 1.732050808 1 0.0002 200
Other (please specify)
Combined uncertainty (k=1): 0.0507
Expanded uncertainty (k=2) (°C): 0.1013
Temperature (°C): 0 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 122 of 125
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.006 °C Normal 2 1 0.0030 200
Drift of reference thermometer since last cal 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.029 °C Rectangular 1.732050808 1 0.0167 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.006 °C Normal 2 1 0.0030 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0 °C Rectangular 1.732050808 1 0.0000 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.00011 °C Rectangular 1.732050808 1 0.0001 200
Other (please specify)
Combined uncertainty (k=1): 0.0208
Expanded uncertainty (k=2) (°C): 0.0416
Temperature (°C): 70 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 °C Normal 2 1 0.0050 200
Drift of reference thermometer since last cal 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.037 °C Rectangular 1.732050808 1 0.0214 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0077 °C Normal 2 1 0.0039 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.005 °C Rectangular 1.732050808 1 0.0029 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 123 of 125
Repeatability 0.00011 °C Rectangular 1.732050808 1 0.0001 200
Other (please specify)
Combined uncertainty (k=1): 0.0253
Expanded uncertainty (k=2) (°C): 0.0505
Temperature (°C): 140 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 °C Normal 2 1 0.0050 200
Drift of reference thermometer since last cal 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.045 °C Rectangular 1.732050808 1 0.0260 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0093 °C Normal 2 1 0.0047 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.00011 °C Rectangular 1.732050808 1 0.0001 200
Other (please specify)
Combined uncertainty (k=1): 0.0281
Expanded uncertainty (k=2) (°C): 0.0562
Temperature (°C): 200 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.01 °C Normal 2 1 0.0050 200
Drift of reference thermometer since last cal 0.01 °C Rectangular 1.732050808 1 0.0058 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.052 °C Rectangular 1.732050808 1 0.0300 200
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 124 of 125
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0107 °C Normal 2 1 0.0054 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.02 °C Rectangular 1.732050808 1 0.0115 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.00011 °C Rectangular 1.732050808 1 0.0001 200
Other (please specify)
Combined uncertainty (k=1): 0.0335
Expanded uncertainty (k=2) (°C): 0.0670
Temperature (°C): -20 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.009 °C Normal 2 1 0.0045 200
Drift of reference thermometer since last cal 0.03 °C Rectangular 1.732050808 1 0.0173 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.027 °C Rectangular 1.732050808 1 0.0156 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0055 °C Normal 2 1 0.0028 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.018 °C Rectangular 1.732050808 1 0.0104 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.00011 °C Rectangular 1.732050808 1 0.0001 200
Other (please specify)
Combined uncertainty (k=1): 0.0261
Expanded uncertainty (k=2) (°C): 0.0521
IPRT comparison (-50 °C to 450 °C)
AFRIMETS.T-S1 Final report (16 August 2017)
Page 125 of 125
Temperature (°C): -10 °C, UUT (794332)
Source of uncertainty Value Unit Probability Divisor Sensitivity Uncertainty Degrees of
distribution (°C / unit) contribution (k=1) (°C) freedom
Calibration of reference thermometer 0.009 °C Normal 2 1 0.0045 200
Drift of reference thermometer since last cal 0.03 °C Rectangular 1.732050808 1 0.0173 200
Stability of R(0.01°C) or R(0°C): ref thermometer (if it is a PRT) 0.028 °C Rectangular 1.732050808 1 0.0162 200
Uncert of ref temperature (WTP or ice point): ref thermometer 0.0058 °C Normal 2 1 0.0029 200
Uncert of electrical measuring instrument: ref thermometer 0.001 °C Rectangular 1.732050808 1 0.0006 200
Temp gradient in bath/furnace (incl stem conduction error) 0.018 °C Rectangular 1.732050808 1 0.0104 200
Stability of R(0.01°C) or R(0°C): UUT 200
Uncert of ref temperature (WTP or ice point): UUT 200
Uncert of electrical measuring instrument: UUT 200
Repeatability 0.00011 °C Rectangular 1.732050808 1 0.0001 200
Other (please specify)
Combined uncertainty (k=1): 0.0264
Expanded uncertainty (k=2) (°C): 0.0529