DMT340 Series Dew Point and Temperature Transmitters For Very Dry Conditions Features • Measures dew point from -70 ... +80 °C (-94 ... +176 °F) with an accuracy of ±2 °C (±3.6 °F) • Condensation-resistant • Unique auto-calibration feature maintains accuracy over long term • Compatible with Vaisala DRYCAP â Hand-Held Dewpoint Meter DM70 • Traceable calibration to measurements and analog outputs (certificates included) • Graphical display and keypad for convenient operation • Optional alarm relays and mains power supply module • Up to three analog outputs, RS-232/485, LAN • Modbus protocol support (RTU/ TCP) Vaisala DRYCAP â Dewpoint and Temperature Transmitter Series DMT340 is designed for industrial low-humidity applications such as industrial drying, compressed air systems, semiconductor industry, dry rooms, baking ovens, and metal heat treatment. Vaisala DRYCAP â Sensor Benefits • Accurate and reliable measurement • Excellent long-term stability • Fast response time • Resistant to environmental factors and condensation Stability at Low Dew Points The Vaisala DRYCAP â sensor is immune to particulate contamination, water condensation, oil vapor, and most chemicals. The sensor is condensation resistant and recovers perfectly if exposed to liquid water. Fast reaction time and stability make its performance unmatched also in dynamic and low dew point applications. Graphical Display of Measurement Data and Trends for Convenient Operation The DMT340 features a large numerical and graphical display with a multilingual menu and keypad. It allows users to easily monitor operational data, measurement trends, and access measurement history for the past 12 months. The display shows measurement trends, real-time data, and measurement history. Versatile Outputs and Data Collection The DMT340 can support up to three isolated analog outputs. Optional AC mains power and relay outputs are also available. In addition to the analog outputs, the DMT340 supports Modbus RTU and TCP/IP communication protocol. The data logger, with real-time clock and battery backup, guarantees reliable logging of measurement data for over four years. The display alarm allows tracking of any measured parameter, with freely configurable low and high limits.The recorded data can be viewed on the local display or transferred to a PC with Microsoft Windows â software. The transmitter can also be connected to a network with an optional LAN interface, which enables an Ethernet connection. A 90
Transcript
DMT340 Series Dew Point andTemperature Transmitters
For Very Dry Conditions
Features
• Measures dew point from-70 ... +80 °C (-94 ... +176 °F) withan accuracy of ±2 °C (±3.6 °F)
• Condensation-resistant
• Unique auto-calibration featuremaintains accuracy over long term
• Compatible with Vaisala DRYCAPâ
Hand-Held Dewpoint Meter DM70
• Traceable calibration tomeasurements and analog outputs(certificates included)
• Graphical display and keypad forconvenient operation
• Optional alarm relays and mainspower supply module
• Up to three analog outputs,RS-232/485, LAN
• Modbus protocol support (RTU/TCP)
Vaisala DRYCAPâ Dewpoint and Temperature Transmitter Series DMT340 is designedfor industrial low-humidity applications such as industrial drying, compressed airsystems, semiconductor industry, dry rooms, baking ovens, and metal heat treatment.
Vaisala DRYCAPâ Sensor Benefits
• Accurate and reliablemeasurement
• Excellent long-term stability
• Fast response time
• Resistant to environmental factorsand condensation
Stability at Low Dew PointsThe Vaisala DRYCAPâ sensor is immuneto particulate contamination, watercondensation, oil vapor, and mostchemicals. The sensor is condensationresistant and recovers perfectly ifexposed to liquid water. Fast reactiontime and stability make its performanceunmatched also in dynamic and low dewpoint applications.
Graphical Display ofMeasurement Data and Trendsfor Convenient OperationThe DMT340 features a large numericaland graphical display with a multilingualmenu and keypad. It allows users toeasily monitor operational data,measurement trends, and accessmeasurement history for the past 12months.
The display shows measurement trends, real-timedata, and measurement history.
Versatile Outputs and DataCollectionThe DMT340 can support up to threeisolated analog outputs. Optional ACmains power and relay outputs are alsoavailable.
In addition to the analog outputs, theDMT340 supports Modbus RTU andTCP/IP communication protocol.
The data logger, with real-time clock andbattery backup, guarantees reliablelogging of measurement data for overfour years. The display alarm allowstracking of any measured parameter,with freely configurable low and highlimits.The recorded data can be viewedon the local display or transferred to a PCwith Microsoft Windowsâ software. Thetransmitter can also be connected to anetwork with an optional LAN interface,which enables an Ethernet connection. A
90
USB service cable makes it easy toconnect the DMT340 to a PC via theservice port for modifying settings orreading logged data.
Easy InstallationWith multiple options to choose from,the instrument can be tailored to meetthe specific needs of each individualapplication and is delivered installation-ready and pre-configured for eachdelivery. Quick delivery time and globalservice network make DMT340 a perfectchoice for any project.
The Vaisala DRYCAPâ Hand-Held Dewpoint MeterDM70 is ideal for fieldchecking DMT340 transmitters.
Mechanical durability up to 250 bar/ 3625 psia up to 100 bar/1450 psia up to 10 bar/145 psia up to 70 bar/1015 psia
Probe diameter 12 mm/0.5 in 12 mm/0.5 in 12 mm/0.5 in 12 mm/0.5 in
Installation Flange 36 mm/1.4 in Fitting body M22 x 1.5
Fitting body NPT 1/2 in
Fitting body R 3/8 inISO
Fitting body G 1/2 in ISO
Fitting body NPT 1/2 in
Fitting body R1/2 in ISO
Fitting body NPT 1/2 in
Ball-valve set BALLVALVE-1
Sampling cell HMP302SC DMT242SC orDMT242SC2
91
DMT340 Series Dewpoint and Temperature Transmittersfor Very Dry Conditions
DMT341 for Installations in Dry Spaces
DMT341 display shows measurement trends, real-time data, and measurementhistory. DMT341 is made for installations in dry rooms where the entire dew pointtransmitter needs to be inside the dry space. The concept is easy to clean andsuitable also for cleanrooms.
183 (7.20) 77 (3.0)
244.5
(9.6
3)
119 (
4.6
9)
DMT341 dimensions in mm (inches)
DMT342 with Small Size Flanged Probe
The DMT342 probe is installed using a flange or sampling cell. The small probe isideal for integration into larger equipment or applications with high pressures.
Flange intersection
Sampling cell HMP302SC
ø36 (1.42)
ø32 (1.26)
41(1.61)
M6
ø12 (
0.4
7)
1/8
"-2
7 N
PT
9(0.35)
7 (0.28)71.5 (2.81)
92.5 (3.64)
81 (3.19)
71 (2.80)
58.7 (2.31)
16 (0.6
3)
ø24.5
45°
45° 45°
M6
ø12.5
(0.4
9)
1/8"-27 NPT
DMT342 dimensions in mm (inches)
92
DMT344 with Probe for High Pressures
The DMT344 features a threaded connection for extended pressures withdifferent fitting-body options. It is ideal for permanent installation intopressurized or vacuum processes.
NP
T 1
/2"
170
41
120
Ø1
2
M2
2x1
.5 o
r
(6.69)
(4.72)
(1.61)
(0.4
7)
DMT344 dimensions in mm (inches)
DMT347 with Small-Sized Probe
The DMT347 probe is ideal for pressurized or vacuum applications in tightspaces. The small probe is installed using Swagelokâ connectors.
41
84 (3.31)
(1.61)
)7
4.0(
21
Ø
”2
/1
TP
N / ”
8/
3 O
SI
Hex 22 mm
(0.87)
I
SO
Go
r ”
2/
1
DMT347 dimensions in mm (inches)
DMT348 with Probe for Pipeline Installations
The DMT348 is ideal for installation into pressurized or vacuum processes wherethe probe needs to be able to be removed while the process is running. Theprobe depth is adjustable.
Ø Ø
/ 448 (17.6)
/ 410 (16.1)
41 (1.61) - 149 (5.87) / 41 (1.61) - 379 (14.9)
191 (7.52)
215.5 (8.48)
41 (1.61)12
(0.4
7)
13
.5 (0
.53
)
R1
/2” IS
O7
/1
35 (1.37)
Optional filter for low pressures, suitable for all models, dimensions in mm(inches). Optional filter provides faster gas exchange to the sensor inapplications where protection from particulates is not needed.
93
DMT340 Series Technical Data
Measurement PerformanceDew Point
Sensor Vaisala DRYCAPâ 180M
Measurement range -70 ... +80 °C (-94 ... +176 °F) Td
Measurement range for continuous use -70 ... +45 °C (-94 ... +113 °F) Td
Accuracy up to 20 bar/290 psia ±2 °C/±3.6 °F (see the accuracy graphbelow)
T63 [T90] response times at 20 °C and 1 l/min flow:
-60 ... -20 °C Td (-76 ... -4 °F Td) 5 s [10 s]
-20 ... -60 °C Td (-4 ... -76 °F Td) 45 s [10 min]
Temperature
Measurement range 0 ... +80 °C (+32 ... +176 °F)
Accuracy ±0.2 °C at room temperature
Temperature sensor Pt100 RTD Class F0.1 IEC 60751
Relative Humidity
Measurement range 0 ... 70 %RH
Accuracy (RH <10 %RH, at + 20 °C) ±0.004 %RH + 20% of reading
Concentration by Volume (ppm)
Measurement range (typical) 10 ... 2500 ppm
Accuracy (at + 20 °C, 1 bar) 1 ppm + 20% of reading
Other measurement parameters available (model-dependent): mixing ratio,absolute humidity, pressure dew point calculated to 1 bar, temperaturedifference (T-Td), water vapor pressure
Operating EnvironmentOperating temperature for probes -40 ... +80 °C (-40 ... +176 °F)
Mechanical durability up to +180 °C (+356 °F)
Mechanical durability of transmitterbody
40 ... +60 °C (-40 ... +140 °F)
Mechanical durability with display 0 ... +60 °C (+32 ... +140 °F)
Storage temperature range -55 ... +80 °C (-67 ... +176 °F)
Pressure range for probes see probe specifications
Sample flow rate no effect
Measured gases non-corrosive gases
Electromagnetic compatibility Complies with EMC standardEN61326-1, Industrial environment
Note: Transmitter with display test impedance of 40 Ω is used in IEC61000-4-5(Surge immunity)
Inputs and OutputsOperating voltage 10 ... 35 VDC, 24 VAC ±20 %
with optional power supply module 100 ... 240 VAC 50/60 Hz
Power Consumption at 20 °C (Uin 24VDC)
RS-232 max. 25 mA
Uout 2 x 0 ... 1V / 0 ... 5 V / 0 ... 10 V max. 25 mA
Iout 2 x 0 ... 20 mA max. 60 mA
display and backlight + 20 mA
during sensor purge max. + 110 mA
Analog Outputs (2 Standard, 3rd Optional)
current output 0 ... 20 mA, 4 ... 20 mA
voltage output 0 ... 1 V, 0 ... 5 V, 0 ... 10 V
Accuracy of analog outputs at 20 °C 0.05% full scale
• DMT345 measures humidity attemperatures up to 180 °C(356 °F)
• DMT346 measures humidity attemperatures up to 350 °C(+662 °F)
• Dew point accuracy ±2 °C(±3.6 °F)
• Condensation-resistant
• Unique auto-calibration feature
• Analog outputs, RS-232/485,WLAN/LAN
• Modbus protocol support (RTU/TCP)
Vaisala DRYCAPâ Dewpoint Transmitters DMT345 and DMT346 are designed forhumidity measurement in industrial drying applications with particularly hightemperatures.
Benefits
• Vaisala DRYCAPâ sensor providesaccurate and reliable measurementwith excellent long-term stabilityand fast response time
• Graphical display and keypad forconvenient operation
• Optional alarm relays and mainspower supply module
Both transmitters incorporate the VaisalaDRYCAPâ sensor, which is accurate,reliable, and stable. The sensor iscondensation-resistant and is immune toparticulate contamination, oil vapor, andmost chemicals. The DRYCAPâ sensor isnotable for its swift response time andrapid recovery after getting wet.
Measure Humidity Directly inHot ProcessesDMT345 and DMT346 are built for directmeasurement in hot processes.Therefore, there is no need for samplingsystems and trace heating. As a result,high measurement accuracy andconstancy are maintained.
The accuracy and stability of DMT345and the DMT346 are due to their uniqueauto-calibration function, developed byVaisala. This feature allows thetransmitter to perform calibration andadjustment by itself while the measuredprocess is running. If the measurementaccuracy is not confirmed, correctionsare made automatically. The procedure isso quick and corrections so minor that itcauses no disruption, ensuring easymaintenance and high performance.
DMT345: Accurate in Hot andDry EnvironmentsDMT345 is designed for accuratehumidity measurement in hot and dryconditions. This model providesunmatched dry-end measurementaccuracy at temperatures up to 140 °C;however, it can operate safely attemperatures up to 180 °C.
The long and robust steel probe and anoptional installation flange allow easy,adjustable installation depth throughinsulation for example in ovens.
DMT346: Reliable in Very HotProcessesDMT346 provides the best measurementperformance at process temperaturesbetween 140 °C and 350 °C.
DMT346 includes a cooling set asstandard. The cooling set providespassive cooling by conducting heat awayfrom the probe and thus reducestemperature to optimal range for thesensor.
The cooling system has no moving parts,and requires no additional power orcooling utilities, so there is no risk ofsensor damage due to mechanicalcooling failure.
Additionally, sensor warming minimizesthe risk of condensation accumulating onthe sensor. In low humidity conditionsthe combination of auto-calibration andDRYCAPâ ensures accuratemeasurement.
96
Graphical Display ofMeasurement Data and Trendsfor Convenient OperationDMT345 and DMT346 transmittersfeature a large numerical and graphicaldisplay with a multilingual menu andkeypad. It allows users to easily monitoroperational data, measurement trends,and access measurement history for thepast 12 months.
The optional data logger, with real-timeclock, makes it possible to generate overfour years of measurement history andzoom in on any desired time or timeframe.
The display alarm allows tracking of anymeasured parameter, with freelyconfigurable low and high limits.
Versatile Outputs and DataCollectionDMT345 and DMT346 transmitters cansupport up to three analog outputs; anisolated galvanic power supply and relayoutputs are also available.
For serial interface the USB connection,RS-232, and RS-485 can be used.
DMT345 and DMT346 are also capable ofapplying the Modbus communicationprotocol and, together with anappropriate connection option, provideeither Modbus RTU (RS-485) or ModbusTCP/IP (Ethernet) communication.
The data logger, with real-time clock andbattery backup, guarantees reliablelogging of measurement data for overfour years. The recorded data can beviewed on the local display or transferredto a PC with Microsoft Windowssoftware. The transmitter can also beconnected to a network with an optionalLAN interface, which enables an Ethernetconnection. A USB service cable makes iteasy to connect DMT345/346 to a PC viathe service port.
With multiple options to choose from,the instrument can be tailored to meetthe specific needs of each individualapplication and is delivered
installation‑ready and pre‑configured foreach delivery. Quick delivery time andglobal service network make DMT340series a perfect choice for any project.
The large graphical display allows the user to checkdata at a glance.
97
Technical Data
Measurement Performance, DMT345Dew Point
Sensor Vaisala DRYCAP 180S
Measurement range -40 … +100 °C (-40 … +212 °F) Td
Accuracy ±2 °C (±3.6 °F) Td
See the accuracy graph below
Dew point accuracy vs. measurement conditions
Response time 63 % [90 %] in flow rate1 l/min and 1 bar pressure
From dry to wet: 5 s [10 s]From wet to dry including auto-calibration 45 s [5 min]
Temperature
Measurement range 0 … +180 °C (+32 … +356 °F)
Measurement range with sensorwarming
Upper range limited by humidity(at 80 %RH warming is switched onand T reading not actual processtemperature)
• Applications: dry chambers, drygases, semiconductormanufacturing, research andtesting, and compressed air
The Vaisala DRYCAPâ Dewpoint Transmitter DMT152 is designed for measuring lowdew point in OEM applications, even down to -80 °C . The excellent long-termstability and reliability of its performance is based on the latest DRYCAPâ polymersensor technology.
Low MaintenanceThe DMT152 mechanics have beendesigned for harsh environmentsrequiring protection against dust, dirt,and splashed water. The DRYCAPâ
technology has a low maintenance needdue to its excellent long-term stabilityand durability against condensation.
ApplicationsThe DMT152 is an ideal choice forindustrial applications where it isnecessary to control very low humidity.Most typical areas of use are air andplastics dryers, dry chambers, dry gases,and high-voltage circuit breakers.
The DMT152 measures accurately andreliably also in the challengingcombination of low humidity and hot air,which is typical in plastics drying.
Benefits
• Accurate
• Compact and powerful
• Fast response time
• Reduced maintenance costs due tolong calibration interval
• Miniature size dew pointtransmitter for e.g. small industrialdryer applications
• Vaisala DRYCAPâ technology withauto-calibration
• Calibration interval of two years
• Dew point measurement range-70 ... +60 °C (-94 ... +140 °F)
• Accuracy ±2 °C (±3.6 °F)
• Withstands condensation
• Compatible with Vaisala DRYCAPâ
Hand-Held Dewpoint Meter DM70
• Traceable calibration
• Easy servicing and data transfervia RS-485 user interface
• LED alarm for exceeded dew pointlevel
• Fast response time
Vaisala DRYCAPâ Dewpoint Transmitter DMT143 is an ideal choice for smallcompressed air dryers, plastic dryers and other OEM applications.
Vaisala DRYCAPâ
Vaisala DRYCAPâ Dewpoint TransmitterDMT143 is a miniature dew pointmeasurement instrument.The transmitter can be installed directlyinto pressurized systems at 50 bar(725 psia) maximum pressure. The long-term high performance is achieved withVaisala DRYCAPâ technology.
The sensor fully withstands getting wet,and therefore, the transmitter performsexceptionally well in applications thatoccasionally experience process waterspikes, such as pipeline condensationduring a system failure or start-up.The sensor is also highly resistant toparticulate contamination, oil vapor andmost chemicals, and is insensitive tothe flow rate.
Long Calibration IntervalThe calibration interval of DMT143 is twoyears. Additionally, Vaisala DRYCAPâ
Hand-Held Dewpoint Meter DM70 can beused to confirm the performance ofDMT143 without disconnectingthe transmitter. For any adjustmentneeds, the transmitter can be sent toVaisala Service.
The auto-calibration software works on-line while the process is running. Ifthe measurement accuracy is notconfirmed, corrections are madeautomatically.
Easy InstallationDMT143 has a variety of features tochoose from, including different output,installation options and alarm LED.
Due to its small size and light weight,DMT143 is quickly and easily installed intight spaces or in small-size pipelines.The alarm LED indicates too high dewpoint in the process. The trigger point ispreset at the factory. It can be lateradjusted with Vaisala DRYCAPâ Hand-Held Dewpoint Meter DM70 ora computer.
• Incorporates advanced VaisalaDRYCAPâ Sensor and enhancedauto-calibration software
• Long-term stability in low dewpoints
• Fast response time
• Two sensor options cover dewpoint measurement range of-60 ... +60 °C (-76 ... +140 °F) withan accuracy of ±2 °C (±3.6 °F)
• Withstands condensation
• Traceable calibration (certificateincluded)
• Compatible with Vaisala DRYCAPâ
Hand-Held Dewpoint Meter DM70
Due to its wide measurement range and high long-term stability, DMT143L is an idealchoice for low dew point industrial applications such as compressed air dryers, plasticdryers, and other OEM applications.
Vaisala DRYCAPâ
Vaisala DRYCAPâ Dewpoint TransmitterDMT143L provides reliable and stablemeasurements for industrial dryerapplications. It is designed for extremeconditions.
DMT143L incorporates Vaisala DRYCAPâ
thin film polymer sensor and auto-calibration software. The standard sensorchoice for dry gases and desiccantdryers is DRYCAPâ 180M and for morehumid applications such as refrigerationdryers, a DRYCAPâ 180S sensor. Bothsensors are immune to particulatecontamination, water condensation, oilvapor, and most chemicals.
Because the sensor withstandscondensation, its performance is suitablefor low dew point applications thatexperience process water spikes, such aspipeline condensation during a systemfailure or start-up.
The auto-calibration software works on-line while the process is running. Ifthe measurement accuracy is notconfirmed, corrections are madeautomatically. DMT143L adjuststhe measurement, corrects dry-end driftsand continues to function. Calibrationoccurs quickly, and with corrections sominor, it will go unnoticed.
Compact, Rugged andIntelligentDue to its compact size, DMT143L isquickly and easily installed in tightspaces.
Users can perform a field-check by usingVaisala DRYCAPâ Hand-Held DewpointMeter DM70. The transmitter can be sentto Vaisala Service for traceablecalibration. The recommendedcalibration interval is every two years.
106
Technical Data
Dew Point TemperatureMeasurement range (typical) -60 … +60 °C (-76 … +140 °F)
Different analog output scalings available. 1)
Accuracy with DRYCAPâ 180M ±2 °C (±3.6 °F) (see graph below)
1) When the dew point is below 0 °C (32 °F), the transmitter outputs frost point.
Accuracy not specified
Accuracy not specified
Dew Point Accuracy vs. Measurement Conditions
Response time 63 % [90 %] at +20 °C (+68 °F) gas temperature
Flow rate > 1 l/min and 1 bar pressure:
-60 → -20 °C Td (-76 → -4 °F Td) 5 s [10 s]
-20 → -60 °C Td (-4 → -76 °F Td) 45 s [10 min]
Accuracy with DRYCAPâ 180S ±2 °C (±3.6 °F) (see graph below)
Dew
poin
t te
mpera
ture
(°C
)
0 20 40 60
0
40
-60
-80
Process temperature (°C)
10
20
30
50
60
70
-10
-20
-30
-50
-40
-70
3010 50
Accuracy < ± 2°C Td
Dew point measurement range lower limit
Water vapor saturation line
Accuracy not specified
Operating EnvironmentTemperature 0 … +60 °C (+32 … +140 °F)
Higher temperature peaks Short-term OK
Relative humidity 0 … 100 %RH
Pressure 0 … 20 bara (0 … 290 psia)
Sample flow rate No effect
Storage temperature -40 … +60 °C (-40 … +140 °F)
Inputs and OutputsAnalog output 4 … 20 mA
Resolution for analog output ±0.002 mA
Accuracy for analog output at +20 °C +/- 0.05 mA
External load for analog output Max. 500 Ω
Typical temperature dependence 0.0008 mA/°C
Serial line for service use RS-485
Operating voltage 18 … 28 VDC
Power consumption at 24 VDC Max. 220 mA
Mechanical SpecificationsProbe material (wetted parts) Stainless steel (AISI 316L)
Sensor DRYCAPâ 180M
Optimal sensor for refrigeration dryers DRYCAPâ 180S
• High accuracy ±1 °C (±1.8 °F) in themeasurement range of refrigerantdryers
• Excellent long-term stability -resistant to compressor oil andmost other chemicals thanks toHUMICAPâ technology
• Low power requirements,10 ... 28 VDC
• Easy to verify functionality withcompatible Vaisala DM70 or HM70hand-held meters
• Optional LED warning light
Vaisala HUMICAPâ Dew Point Transmitter DMT132 is an affordable dew pointmeasurement instrument designed to verify the functionality of refrigerant dryers. It isespecially well suited for OEM dryer manufacturers.
Direct Measurement CutsCostsDirect outlet air dew point measurementprovides accurate information aboutdryer functionality and is more reliablethan the traditional method of measuringrefrigerator temperature only.Knowledge of the real dew point ensureshigh quality compressed air at all timesand enables customers to optimize dryercapacity. This helps to preventinvestment in redundant dryer capacityand avoid unnecessary maintenance andcostly malfunctions.
High Accuracy and Long-TermStabilityDMT132 provides optimal performance inthe operating range of refrigerant dryers.In the measurement range of -3 … 20 °C(+26.6 … +68 °F), where the refrigerator
dryers typically operate, the Td accuracyis ±1 °C (±1.8 °F). The instrumentincorporates the proven VaisalaHUMICAPâ sensor, which is resistant tocompressor oil and most otherchemicals, thereby providing excellentlong-term stability.
Quick Installation and EasyField CheckingIt takes just a few minutes to installDMT132 directly into a dryer orcompressed air line through a G1/2" ISOthread. Vaisala sampling cells can also beused. The loop-powered electronicsmean that wiring is easy and powerrequirements are low. DMT132 operatingvoltages can be as low as 10 VDC.
Verifying the performance of DMT132 iseasy with the compatible Vaisala DM70or HM70 hand-held meters. The user canperform possible adjustments withVaisala HMK15 Humidity Calibrator.
Demand for dew point sensors to verify refrigerantdryers is increasing. Direct dew point measurementenables energy savings and improved efficiency.
108
Technical Data
Measurement PerformanceMeasurement range -30 ... +50 °C (-22 ... +122 °F) Td
Accuracy at +20 °C (+68 °F) ±1 °C for -3 ... 20 °C(+26.6 ... +68 °F) Td
1)
±2 °C for -15 ... -3 °C(+5 ... +26.6 °F) Td
1)
See accuracy graph below
Typical Response Time at 20 °C (+68 °F) Gas Temperature and 1 Bar Pressure
-14 → +3 °C (+7 → +37 °F) Td 17 s (63 %)40 s (90 %)
+3 → -14 °C (+37 → +7 °F) Td 33 s (63 %)85 s (90 %)
Calculated Variables
Dew point converted to atmosphericpressure
Td/f atm
1) When dew point is below 0 °C (+32 °F), the transmitter outputs frost point.
De
w p
oin
t t
em
pe
ratu
re (
°C)
0 20
20
0
10
30
-10
-20
-30
-10 10 30 40 50 60
Temperature of measured gas (°C)
50
40
60
Accuracy±1 °C Accuracy
±2 °C
-20
Accuracy not specified
Operating EnvironmentOperating temperature -30 ... +50 °C (-22 ... +122 °F)
Operating pressure 0 ... 20 bar
Relative humidity 0 ... 100 %RH
Sample flow rate No effect on measurement accuracy
