Bedienungsanleitung SCINTO S E2 - Projecto · 2009. 11. 23. · The decay of radio -nuclides is...

Operation Manual

Scinto doserate meter with

scintillation detector (NaI)

Contents 1 Preface 4 2 Principle of measurement 5 3 Brief description of the meter 6 4 Setup and installation 8 4.1 Battery check 8 5 Operation of the SCINTO 9 5.1 Operating functions 10 5.1.1 Menu overview 10 5.1.2 Turn on / off device 11 5.1.3 Button functions 11 5.1.4 Alarm threshold setting 13 5.2 Start screen 14 5.3 Measurement display 15 5.4 Quick menu 16 5.4.1 Stored data records 17 5.4.1.1 View data records 18 5.4.1.1.1 Display of measurement values in detail 19 5.4.1.2 Delete data records 20 5.5 Main menu 21 5.5.1 Code input 21 5.5.2 Main menu 22 5.5.2.1 Alarm threshold settings 23 5.5.2.1.1 Doserate alarm thresholds 24 5.5.2.1.2 Count alarm thresholds 25 5.5.2.2 Probe alarm thresholds 26 5.5.2.2.1 Probe alarm threshold setting 27 5.5.2.3 Average determination 28 5.5.2.3.1 Statistical error 28 5.5.2.3.2 Ring memory 30 5.5.2.4 Measuring value storage 31 5.5.2.4.1 Parameter measuring value storage 32 5.5.2.4.2 Stored data records 33 5.5.2.5 Other parameters 34 5.5.2.5.1 Change code 35 5.5.2.5.2 Date / Time setting 36 5.5.2.5.3 Illumination time 37

SCINTO Operation Manual

Issue 2005/01 E, subject to technical changes without notice page 3

5.5.2.5.4 Keyboard beep 38 5.5.2.5.5 Menu escape time 39 5.5.2.5.6 Language 40 6 Technical data 41 6.1 Device 41 6.2 Detector 42 6.2.1 Angle dependence 43 6.2.2 Energy dependence 44 6.2.3 Diagram to convert count rate values into dose rate values 44 6.2.4 Photomultiplier 45 6.2.4.1 Data sheet 45 6.2.4.2 Spectral range 46 6.2.4.3 Amplification vs. voltage 46 6.2.4.4 Diagram counts / channel 47 6.2.4.5 Temperature coefficient of the anode sensitivity 47 6.2.4.6 Dimensions 48 6.2.4.7 Socket wiring 48 6.3 External detectors 49 6.3.1 Doserate probes 49 6.3.1.1 γ- Low doserate probe 18 550 DE 49 6.3.1.2 γ- Doserate probe 18 509 DE 52 6.3.1.3 γ- Doserate probe 18 529 DE 55 6.3.2 Count probes 57 6.3.2.1 Universal probe 18504 D 57 6.3.2.2 Smear test probe 18536 D 58 6.3.2.3 Low dose probe 18526 D 59 6.3.2.4 Large-area plastic scintillation detectors 60 7 Attestation of conformity 61 8 Concluding remark 62 9 Factory test protocol 1“ x 1.5“ 64



1 Preface Dear Customer, Congratulations on the purchase of the doserate meter SCINTO, as

you acquired an instrument of considerable efficiency. The system has been especially designed for high-sensitive doser-

ate measurements covering the range of the environmental back-

ground up to the doserate range of 200µSv/h - 500µSv/h. By means

of the scintillation detector even minor changes of the environmental

background can be made out reliably. The operation manual has been built-up in such a way that all func-tions of the measuring instrument can be learned and looked up quickly and easily: beginning with the explanation of all basic func-tions, followed by a detailed description of parameter possibilities, e. g. programming of freely adjustable alarm levels or record of meas-ured data. We wish you a lot of pleasure with your doserate meter SCINTO. Security note: This instrument is not designed for being operated in explosion endangered areas!



2 Principle of measurement The decay of radio-nuclides is accompanied by the emission of ra-diation, e.g. gamma rays (photons). These photons are measured by a detector which converts each photon into an electrical signal.

Secondary electronics multiplier

1 Radiation Light flash Electrons 2 3 4 electrical pulse

2

Photocathode

3

Light reflector

Scintillator

1

to amplifier

4

These signals are amplified by a preamplifier which is integrated in the probe. The signals are then transmitted to the display unit, where they are counted, processed and displayed.



3 Brief description of the meter The SCINTO is a digital radiation measuring instrument for the measurement of Gamma - radiation and X-rays. By means of the scintillation detector it is possible to effect measurements in the en-ergy range from approx. 25 keV up.



According to the required measuring task, it is possible to select one

of the following two operating modes: • Measurement of equivalent doserate in nSv/h

respectively µSv/h • Function as ratemeter with indication of count rate

(cps respectively kcps) The selection of the required operating mode is described in chapter

5.4.

In each operating mode, three alarm thresholds can be parameter-

ized according to your requirements. The activated alarm level (I, II,

III) is shown on the upper left of the LC-display. If the alarm level is

deactivated, no identification character will appear on the display. Upon delivery, the following alarm levels are preset: in doserate mode 1 * 7,5 * 25 µSv/h

in ratemeter mode 75 * 250 * 500 cps When the reading exceeds the adjusted alarm level, the user will be warned of a potential danger by an audible alarm.



4 Setup and installation The SCINTO is supplied with power by 2 standard batteries TYPE AA. With new batteries, the SCINTO can be used approx. 30 hours. For operation with rechargeable batteries, the instrument has an in-telligent charging connection with boost charge function approx. 300 mA and charge conservation circuit. All you need is the suitable charging unit/power supply and two rechargeable batteries. 4.1 BATTERY CHECK To check the charging stadium, the battery voltage is displayed af-ter turning on the device, e.g 3.0 V with new batteries or 2.5 V with charged batteries. If the battery voltage is less than 2.1 V, the batteries should be re-placed. With a battery voltage less than 2.1 V, the battery symbol is shown during measurement.

battery voltage



5 Operation of the SCINTO

socket for exter-nal detectors

On/Off button Quick menu

Down button (menu)

Enter button (menu)

charging control light

socket for charging and RS 232 interface

button Illumination + Special functions (shown on display)

sound exit for internal loud-speaker

LC-display 128 x 64 pixels

battery lock screw

Up button (menu)

position of the batteries in the compartment

NaI detector



5.1 OPERATING FUNCTIONS 5.1.1 Menu overview

The program structure of the SCINTO as a diagram:

Start screen

Continuous measurem.

Quick menu Single pulsesAcoustic

alarmUnit

cps / Sv/hStored data

recordsMain menu

Request for code

Alarm thresholds

Probes- alarm thresh.

Averaging

Date / Time

Illumination duration

Meas. value memory

Meas. start selection

Set CPS alarm Set DR alarm

Probe selection

Alarm threshold setting

Display illumination

Store measurement (*)

Turn off

Automatic menu end

Other parameters

Code change

Keyboard beep

Language

ParametersStored data

records

View data records

Delete last record

Delete all records

Print stored data records

DynamicRing

memory

(*)only if selected in Main menu



5.1.2 Turn on / off device The SCINTO is operated by means of a foil keyboard. To turn on the device, the On/Off button has to be pushed until the start screen appears (approx. 2 seconds). The device can be turned off in the Quick menu. Push the On/Off button shortly to enter the Quick menu. The SCINTO can be turned off in two ways:

1. Choose the menu item “Turn off device” and confirm with the Enter- Button.

2. Push the On/Off button one more time shortly

5.1.3 Button functions If the device is turned on, the On/Off button has to be pushed to enter the Quick menu. Every user has access to this menu. The number of functions in the Quick menu can be defined in the Main menu, which is protected by an access code. The several menu items are selected with the arrow buttons. The selected menu item is displayed as a dark bar with light letters (invers). If the selected menu item is confirmed with the Enter button, the desired submenu appears. The buttons for operation are shown left below on the LC display. The function of the func-tion button is shown right below.

On/Off button Quick menu

arrow button “selection down“ arrow button

“selection up“

Enter button

illumination / function button

function button

selected menu item (invers)

shows possible button functions



The parameters are set according to the following scheme: 1. Parameters which can be activated or deactivated are dis-

played in square brackets. If the parameter is deactivated, the position between the brackets is empty [ ]. If the pa-rameter has been activated by the Enter button, a cross is shown between the brackets [X]. This kind of parameters can be activated and deactivated independently from other parameters.

2. Another kind of parameters are those meant to switch from one function to another. This means that from a list with related functions, only one function can be activated at the same time. This kind of parameters are shown in round brackets ( ). If such a parameter is acti-vated by the Enter button (*), all other related parameters are deactivated.

3. If a number or a description has to be changed, the first digit of the selected number starts to blink. This digit can be changed to a lower or higher level by using the arrow buttons. If the next digit has to be changed, it can be selected by pushing the function button (which belongs to the arrow right below on the display). If the setting is complete, it can be confirmed and stored by pushing the Enter button.



5.1.4 Alarm threshold setting To set an alarm threshold, the following steps are required:

1. Enter the Quick menu with the On/Off button. 2. Select the item “Main menu” and confirm with

the Enter button. 3. Enter and confirm access code for Main menu. 4. Select the submenu “Alarm thresholds”. 5. Select the desired measuring mode (cps or doserate) and confirm with Enter 6. Select the alarm threshold with the arrow buttons and activate the

change function with Enter. The first digit of the number to be changed is blinking now.

7. With the function button every digit can be selected and set to the de-sired value by using the arrow buttons.

8. Store the new value of the alarm threshold with Enter.

Display: Alarm threshold: 1, 2 or 3 Activated: If an alarm threshold is exceeded, an audible alarm will be trig-gered. In the measuring mode, this alarm can be quit by means of the Enter button. If more than one alarm threshold is activated, the next higher alarm threshold is activated after quitting the previous one. If the measuring value falls below the deactivated alarm threshold, this threshold is activated again.

Button functions:

No function

Select next position. At the end of a number: select first position.

Change value of selected digit 9..0 and 0..9. Store new alarm threshold.

alarm threshold activated

alarm threshold(s) Enter button to store the new alarm threshold value

function button: select next digit

Start screen Measuring Quick menu Main menu Request for code

Alarm thresholds

Doserate alarm thesholds

Alarm thresh. I,II,III

CPS - alarm thresholds

Alarm thresh. I,II,III



5.2 START SCREEN The start screen provides an overview of the software status, the battery voltage and indicates possible system malfunctions. Display: Company name Device name

Battery voltage (If the battery voltage is less than 2.1 Volt, a battery symbol appears during measurement)

SCINTO serial number Software version

Button functions:

On/Off button / Quick menu Illumination on/off

No function No function

device serial number

company name device name

battery voltage

software version



5.3 MEASUREMENT DISPLAY After the device has been turned on and the start screen has ap-peared, the instrument automatically switches to the measuring mode. The SCINTO starts its measurement process using the pa-rameters defined last time.

Display:

Active alarm thresholds: 1, 2 or 3 Active alarm threshold value Current measuring value + unit cps or (n,µ,m)Sv/h Analogical display in current unit

Button functions:

On/Off button / Quick menu. After confirming, the quick menu appears. See Fehler! Verweisquelle konnte nicht gefunden werden. (Also possible to turn off the device by pushing this button one more time in the Quick menu).

Illumination on/off

No function

By pushing the Enter button, a measurement can be started or measuring values can be stored. See 5.5.2.4

current value as digital reading

selected mea-suring mode

active alarm threshold

defined alarm threshold

analogical display

unit (cps, µSv/h)



5.4 QUICK MENU The Quick menu contains important functions which have to be changed quickly during measurement (e.g. acoustic pulse on/off). Push the On/Off button to open the Quick menu. The function Stored data records only appears if activated in the Main menu.

Display: Acoustic counts On – Off Acoustic alarm On – Off Defined Unit: counts per second or doserate in Sv/h Stored data records: submenu to view, print and delete stored

values Main menu: access protected by a code number Device switch off: This function is only possible in the Quick

menu.

Button functions:

On/Off button

End of Quick menu

Select the desired menu item

Change a selection or continue with a submenu item

The SCINTO can also be turned off by pushing the On/Off button one more time in the Quick menu

acoustic counts on/off

close Quick menu

switch from cps to (µ)Sv/h

call Main menu

turn off device

view, print or delete stored values

acoustic alarm after exceeding threshold



5.4.1 Stored data records Up to 750 datasets can be stored in the system’s memory. The func-tion to store has to be activated in the Main menu. (see 5.5.2.4.1) To get the values displayed also in the Quick menu, the function “Val-ues-> Quick m.” (see 5.5.2.4.1) has to be activated.

Display: View data records: shows stored values Last record delete: deletion of the last dataset (e.g. after a false

measurement) All records delete: deletion of complete database Button functions:

No function Return to Main menu

Select the desired menu item Continue with a submenu item

shows stored measurement values Only the last data record is deleted


closes the submenu Stored data records

All stored values are deleted.



5.4.1.1 View data records The stored measurement values are shown in a list. After pushing the Enter

button the measurement value is shown

in detail. Up to 6 measurement values are shown simultaneously.

Display:

Chart heading Selected data record Date, time, value and unit of the selected measurement Button functions: No function

Closes the selection menu

Selects the measurement to be shown The selected measurement is shown in detail

date and value of measurement

shows the selected memory position

chart heading


closes the measuring value chart



5.4.1.1.1 Display of measurement values in detail

After being selected from the list, the stored measurement values are displayed with the following details:

Display: Selected memory position (maximum 750 memory positions)

Current measurement value indicated digitally Unit: cps or µSv/h Date and time of the stored measurement Button functions:

No function Back to measurement value indication in chart format

Selects the next or the last memory position No function


closes the display of measurement values

measured value

defined unit date and time of measurement

selected memory position



5.4.1.2 Delete data records To avoid the lost of data, the system asks to confirm the deletion be-fore the data are actually deleted.

Display: Menu heading Security question before deletion Button functions: No function

Aborts the deletion

No function Confirms the deletion

shows possible button functions aborts the deletion

security question before deletion

selected function: delete last data record

menu heading



5.5 MAIN MENU

5.5.1 Code input

The access to the main menu is protected by a 4-digit code to rule out any inadvertent modification of the system parameters. Display:

Access code Button functions: No function

Select next position

Change value of selected digit 9..0 and 0..9

Confirm code

Push this but-ton to select the next digit to be changed.

The digit that can be changed is flashing.

shows the buttons to be pushed

The access code on delivery is: 0000



5.5.2 Main menu Setting of the system parameters

Display:

Alarm thresholds: alarm threshold parameter setting see 5.1.4 Probe alarm thresholds: alarm threshold parameter setting of the externally connectible probes Averaging: parameter setting of measuring value averaging mode Measuring value storage: view the stored measurement values and set parameters of the store function Other parameters: access code to Main menu, setting of date/time and display illumination functions Button functions:

No function

Close the Main menu – return to the measurement mode


submenu for parameter setting of probe alarm thresholds

submenu Storage

submenu Averaging

shows possible button functions closes the menu

setting of display illumination, access code and date/time

submenu for alarm threshold settings



5.5.2.1 Alarm threshold settings Selection of the alarm thresholds to be set

Display:

DR-thresholds: alarm thresholds for measurement in the doserate mode (µSv/h) Pulse thresholds: alarm threshold for measurement in the count mode (cps) Button functions:

No function

Close the submenu – return to the Main menu


count alarm thresholds

doserate alarm thresholds




5.5.2.1.1 Doserate alarm thresholds

To set an alarm threshold, the following steps are required:

1. Select the alarm threshold with the arrow buttons and activate the





Button functions:

No function

Select next position. At the end of a number: select first position

Change value of selected digit 9..0 and 0..9 Confirm new alarm threshold


alarm threshold(s) Enter button to store the new alarm threshold value


Startbild Messbetrieb Kurzmenü Haupmenü Codeabfrage Warnschwellen Dosisleistungs - Warnschwellen

Warnschwelle I,II,III



5.5.2.1.2 Count alarm thresholds

To set an alarm threshold, the following steps are required:

1. Select the alarm threshold with the arrow buttons and activate the change function with Enter. The first digit of the number to be changed is blinking now.




Button functions:

No function

Select next position. At the end of a number: select first position

Change value of selected digit 9..0 and 0..9 Store new alarm threshold


alarm threshold(s)

Enter button to store the new alarm threshold value


Startbild Messbetrieb Kurzmenü Haupmenü Codeabfrage Warnschwellen Impuls - Warnschwellen

Warnschwelle I,II,III



5.5.2.2 Probe alarm thresholds Selection of the probe to be set Display:

Probe 18550 DE: Graetz probe 5 µSv/h – 20 mSv/h Probe 18509 DE: Graetz probe 100 µSv/h – 1 Sv/h Probe 18529 DE: Graetz probe 5 mSv/h – 10 Sv/h Count probe: various 0 Ips – 100 kIps Probe NaI: S.E.A. probe background – 200 µSv/h Button functions:

No function



probe type selection




5.5.2.2.1 Probe alarm threshold setting

To set an alarm threshold, the following steps are required: 1. Select the alarm threshold with the arrow buttons and activate the




Display: Alarm threshold: For each probe type, an alarm threshold is stored and activated au-tomatically after a probe change. Activated: In case of exceeding the defined alarm threshold, an acoustic alarm is triggered.

Button functions:

No function


Select the desired menu item Activate the edit mode


probe type Enter button to acti-vate the change function

closes the menu

alarm threshold



5.5.2.3 Average determination 5.5.2.3.1 Statistical error

Nuclear decays, i.e. transformation of nuclei are natural, randomly distributed events. If you examine e.g. a radiation source using a de-tector and measures the number of registered events periodically over a fixed measuring time, then you will see that an accumulation occurs in a certain area. From the size of the area of this average value you can easily infer the intensity of the source. Its true inten-sity, however, remains unknown, since you cannot choose an infi-nitely long period of observation. The average value becomes an exact value only if the period of observation is infinite. When inter-preting the measured values you only have to indicate the range in which the exact intensity is expected!

The mathematical relationship between random events is described by the probability calculus, where the natural distribution, e.g. in case of nuclear decay, is expressed by a so-called Gauss distribu-tion.

This can be presented in a simplified manner: It is more probable to obtain measured values which come close to the exact quantity than measured values that are subject to signifi-cant deviations. It is equally probable that measured values smaller or larger than the exact value will be obtained (symmetrical distribution).

Example :

A radioactive source of known intensity emits on average 100 parti-cles per second which are registered by a detector in 1-second cy-cles.

The statistical variability for ± 1 σ (sigma) is:

√100 = ± 10 counts.



If a large number of measuring cycles are evaluated, the following relationship becomes apparent:

Schedule 1 This shows that it may be improbable but by no means impossible to find a measured value smaller than 50 or larger than 150; how-ever, this probability is only approx. 1 to 1 700 000. The purpose of this short mathematical excursion is to further the understanding of the function of the ring memory. For the result display, an average is calculated from the number of values. The number of memory slots are defined in this menu item. A smaller value e.g. < 10 results in a higher variability of the reading but small changes are detected faster. A larger value causes a very stable reading, but small changes require a very long time and may possibly not be detected. A general recommendation for setting cannot be given, since the setting depends on a large degree on your terms of reference.

Number of cycles in %

Measured values from to

Standard deviation (± 1 σ) %

68.27 90 110 1 95.45 80 120 2 99.73 70 130 3 99.997 60 140 4 99.999943 50 150 5



5.5.2.3.2 Ring memory

Display: Display:

dynamic: The ring memory quantity is calculated and set auto-matically by means of the count rates. A dynamic smoothing proce-dure is used: y = ( y(old) * (smoothing factor –1)+ count rate )/ smoothing factor The smoothing factor is calculated with the following formula: smoothing factor = (100 – radical (count rate)) + 1 Limits: For count rates of over 10000, the smoothing factor is 1. For low count rates (Background) approx. 100. The advantage of this is that the standard deviation is always < 1% when the measur-ing time is sufficiently long.

Ring memory: The counts are collected in a ring memory. The values are added and devided by the number of values. If the ring counter is full, the oldest values are overwritten (first in first out). The number of memory positions is definable from 2 - 99. For count rates > 1000 cps the system uses a fixed ring memory of 2.

Button functions:

No function

End of menu item – in input mode: next position

Change selected digit

Confirm input

average determination with ring memory

dynamic average calculation

shows possible button functions closes the average

setting

ring memory quantity



5.5.2.4 Measuring value storage Up to 750 datasets can be stored in the memory of the SCINTO. This function can be turned on or off in the submenu ”Parameter”.

Display:

Parameter: parameter setting for measuring value storage

Stored data records: view stored values in chart or in detail delete the last value or all values

Button functions:

No function

End of menu item Select the desired menu item

Confirm selection

view or delete stored values

parameter setting of the measuring value storage


closes the menu item “Measuring value storage”



5.5.2.4.1 Parameter measuring value storage

The evaluation and deletion of stored data in the Quick menu can be locked. In that case, these data are only available in the Main menu. Eventually present data records do not get lost after deac-tivating.

Display: Measuring value storage Active: activating the storage function Values-> Quick m.: The measuring value menu is displayed in the Quick menu. Stored data can be viewed, deleted and printed from the Quick menu.

Button functions:

No function End of menu item – in input mode: next position

Select the desired menu item or change the selected input

Confirm input

the stored values can be viewed and deleted in the Quick menu

acitvates the mea-suring value storage

shows possible button functions meaning of the

function button



5.5.2.4.2 Stored data records

Up to 750 datasets can be stored in the system’s memory. The function to store has to be activated in the Main menu. (see 5.5.2.4.1)

Display:

View data records: shows stored values Last record delete: deletion of the last data record

(e.g. after a wrong measurement) All records delete: deletion of complete database

Button functions:

No function

Return to Main menu

Select the desired menu item

Continue with a submenu item

All stored values are deleted

shows stored measuring values

Only the last data record is deleted.

shows possible button func-tions closes the sub-

menu stored data records



5.5.2.5 Other parameters Setting of the system parameters

Display:

Change code: The access to the Main menu is protected by a 4-digit code. Input of a new code Date / Time: setting of date and time Illumination time: setting of display illumination function Keyboard beep: volume setting for the button operation Menu Escape Time: define how long a submenu is displayed Language: selection of the active system language Button functions:

No function

Closes the Main menu – return to measuring mode


parameter setting: menu escape time

date / time setting

display illumination time setting

change access code


closes the menu

language selection volume setting for button operation



5.5.2.5.1 Change code

The access to the main menu is protected by a 4-digit code to rule out any inadvertent modification of the system parameters.

The access code on delivery is: 0000

Display: access code for Main menu Button functions: No function


Change value of selected digit 9..0 and 0..9 Confirm code

Push this button to select the next digit to be changed.

The digit that can be changed is flashing.

Shows the but-tons to be pushed



5.5.2.5.2 Date / Time setting

In order to assign a correct date and time for the measurement re-sults of the measurement value storage, the SCINTO is equipped with a battery-operated clock.

Display: current: display of current system time

digits: display of the modified time Button functions:

No function


Change value of selected digit 9..0 and 0..9

Confirm new system time

The clock does not switch from summer- to wintertime and vice versa automatically. This has to be done manually.

changed time

current system time


meaning of the function button

The digit that can be changed is flashing



5.5.2.5.3 Illumination time

Since the illumination of the LC-display requires rather much energy, the illumination can be set to turn off automatically.

Display:

On/Off by button: Display is illuminated until the button is pushed again. Automatic turn off after time: defined time period after which the LCD-illumination is turned off automatically

Button functions:

No function

End of menu item – in input mode: next position

In input mode: Change value of selected digit Activate input mode

no automatic illu-mination turn off


return to last menu item

automatic turn off

time for automa-tic turn off



5.5.2.5.4 Keyboard beep

To adapt the operation of the SCINTO to different fields of applica-tion, the function “Keyboard beep” has been integrated. In a noisy area (e.g. industry) and eventual operation with gloves, it is useful to activate the loud mode of the keyboard beep. In other areas, this setting can be disturbing. In that case, the keyboard beep function can be switched to the quiet mode or turned off.

Display:

off: no sound when pushing button quiet: short (quiet) sound when pushing button. Very appropriate for

use in low-noise areas (e.g. in closed rooms) loud: longer (louder) sound when pushing button. Very appropriate

for use in noisy areas (e.g. industry) Button functions:

No function

End of menu item Select the desired menu item

Confirm selection

no sound when pushing button


quiet or loud sound when pushing button

closes menu item



5.5.2.5.5 Menu escape time

In order to make the SCINTO faster to operate, the function Menu escape time was introduced. This function is only useful in the Quick menu, which is the reason why the menu escape time is very short for this function. The significant longer escape times in the Main menu are meant to switch back a device that has been left in the Main menu to the measuring mode automatically. Display: Automatic return: short: Main menu: approx. 4 min. Quick menu: without

changes approx. 8 sec. After changes approx. 3 sec.

long: Main menu: approx. 8 min. Quick menu: without changes approx.16 sec. After changes approx. 6 sec.

only by button: automatic return turned off

Button functions:

No function End of menu item – in input mode: next position

Select the desired menu item or change the selected input

Confirm input

automatic return: long time

automatic return: short time


meaning of the function button

automatic return: off



5.5.2.5.6 Language

The SCINTO offers the possibility to select one of currently three languages.

Display:

Language: French, English and German Button functions:

No function

End of menu item – in input mode: next position Select the desired menu item

Confirm selection

language selection

shows possible button functions meaning of

function button



6 Technical data 6.1 DEVICE

Measuring electronics: integrated microcontroller

Keyboard: Foil keyboard: ( On-Off, illumination-function button, 2 arrow buttons and Enter)

Alarm: 3 thresholds definable for each measuring mode

Measuring value display: as desired in cps or (n/µ/m)Sv/h

Measuring time: continuously (definable ring memory)

Display: large-area, graphic LC display 128 x 64 pixel

Power supply: 3 Volt. 2 x batteries type: AA Mignon

Power consumption: ca. 50 mA (without illumination, with background radiation)

Dimensions: (L (with handle) x W x H) 1“x1.5“ approx. 300 x 120 x 135 mm

1.5“x2“ approx. 315 x 120 x 135 mm

Weight: 1“x1.5“ approx. 750 g, 1.5“x2“ approx. 900 g

Housing: ergonomically shaped plastic housing (PA6)

Interfaces: • serial interface RS 232

o connection to PC o printer control § baud rate: 9600 § data bits: 8 § stop bit: 1 § parity: none

• quick charging / mains operation • probe recognition

o Graetz counts probes and dose rate probes

o SEA probes



6.2 DETECTOR

Radiation type: for measurement of Gamma-radiation and X-rays (at DC-equipment)

Calibration: with Gamma-radiation, Cs 137

Measuring size: in photon-equivalent doserate

Nominal working range for Photon energy: 25 keV-1.3 MeV, measuring error approx. ± 50 %

Optimum direction: radial radiation onto the probe body

Detector: NaI(Tl)-chrystal detector dimensions: 1.5 x1“ = 38 mm x 25 mm Ø 2 x1.5“ = 51 mm x 38 mm Ø Nominal working range for relative air humidity: 0 - 95 %, no influence

Nominal working range for outside air pressure: 100-1300 hPa, influence negligible Nominal working range for temperature: operation: - 20 °C till + 50 °C storage: - 25 °C till + 60 °C ? t < 10° C/h



Display ranges: automatic range switch

following display 1 BG – 99,9 nSv/h (BG = background) measuring ranges 2 100 – 999 nSv/h 3 1 – 9,99 µSv/h 4 10 – 99,9 µSv/h 1.5“ x 1“ 5 100 – 500 µSv/h 2“ x 1.5“ 5 100 – 200 µSv/h

Guaranteed error margin under reference conditions: = ± 20 %

Response time: 4 s

Overload capacity: > 2 mSv/h

Detector voltage: up to approx. 1500 Volt 6.2.1 Angle dependence

position of device: horizontal

reference energy E = 662 keV

front

right 1 0 0 % left

5 0 %



0 300 600 900 1200 1500Photon Energie [keV]

-100

-80

-60

-40

-20

0

20

40

60

80

100

q/q0

6.2.2 Energy dependence

6.2.3 Diagram to convert count rate values into dose

rate values (Cs-137)

q = a c t u a l v a lu e

s e t p o in t q = value of q at reference energy (E = 662 keV)

10001001010 DL [µSv/h]

1 0.1

100

1k

10 k

100 k

1000 k

mpuls/s cont rate

Photon energy (KeV)



6.2.4 Photomultiplier 6.2.4.1 Data sheet



6.2.4.2 Spectral range

6.2.4.3 Amplification vs. voltage



6.2.4.4 Diagram counts / channel

6.2.4.5 Temperature coefficient of the anode sensitivity



6.2.4.6 Dimensions

6.2.4.7 Socket wiring



6.3 EXTERNAL DETECTORS It is possible to connect external dose rate probes to the SCINTO. The following probes can be connected by an optionally available probe ca-ble:

6.3.1 Doserate probes

6.3.1.1 γ- Low doserate probe 18 550 DE

Type of radiation: for gamma and x-ray measurement (DC-installations)

Calibration: using gamma radiation, Cs 137

Measuring size: photon-equivalent dose rate

* Nominal working range of the photon energy: 48 keV-1,3 MeV, max. measuring error = 30 %

Optimum direction: radial radiation onto the probe body.

Detector: ZP 1200

Detector dimensions: internal diameter: 15 mm effective length: 40 mm housing thickness: 250 mg/cm² size: 54 x 17 mm Ø

Position of detector in device: The detector is positioned axially in the centre of the probe.

Position of reference point: The reference point is identified by a ring-like marking on the probe housing.

* Nominal working range of atmospheric humidity: 0 - 95 %, no influence, the device is dust- and wa-

terproof according to DIN 40050 (lP 67)

* Nominal working range for outside air pressure: 100-1300 hPa, influence negligible.

* Nominal working range: operation: - 30 °C till + 60 °C storage: - 40 °C till + 70 °C



Indication ranges: automatic range switch Following indication ranges: 1 48 - 999 nSv/h 2 1,00 - 9,99 µSv/h 3 10,0 - 99,9 µSv/h 4 100 - 999 µSv/h 5 1,00 - 9,99 mSv/h 6 10,0 - 19,9 mSv/h

* Measuring ranges: 1 5,00 - 9,99 µSv/h 2 10,0 - 99,9 µSv/h 3 100 - 999 µSv/h 4 1,00 - 9,99 mSv/h 5 10,0 - 19,9 mSv/h

Guaranteed error margin under reference conditions: =± 15 % In case of repeating measurement: from 10 µSv/h Sr = 5 % (Sr = relative standard deviation)

Average life expectancy of the counter tube: at 1 mSv/h approx. 17500 h

Response time: 4 s

Overload capacity: > 1 Sv/h (continuous radiation)

* After effect: negligible with exposure to 100 times the final reading

* Warming-up time: 6 s

Housing: aluminium housing, bronze anodised, protection class IP 67

Dimensions: 40 mm Ø x 126 mm

Weight: approx. 120 g * These values have been checked by the PTB (German physical- technical federal institute) as part of the design approval.



Energy dependence of the ?-probe 18550 DE E

ner

gy

dep

end

ence

of

the

resp

on

sive

nes

s

Pro

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1855

0 D

E N

r.:

6600

2

Mid

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en

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6.3.1.2 γ- Doserate probe 18 509 DE



Measuring size: photon-equivalent dose rate * Nominal working range of the photon energy: 48 keV-1,3 MeV, max. measuring error = 30 % Optimum direction: radial radiation onto the probe body. Detector: ZP 1200 Detector dimensions: internal diameter: 4,8 mm effective length: 16 mm housing thickness: 80-100 mg/cm² size: 26 x 6,2 mm Ø Position of detector in device: The detector is positioned axially in

the centre of the probe. Position of reference point: The reference point is identified by a ring-like

marking on the probe housing. *Nominal working range of the temperature: operation: - 30 °C till + 60 °C storage: - 40 °C till + 70 °C



Indication ranges: automatic range switch following indication ranges: 1 0,0 - 99,9 µSv/h 2 100 - 999 µSv/h 3 1,00 - 9,99 mSv/h 4 10,0 - 99,9 mSv/h 5 100 - 999 mSv/h

* Measuring ranges: 1 100 - 999 µSv/h 2 1,00 - 9,99 mSv/h 3 10,0 - 99,9 mSv/h 4 100 - 999 mSv/h

Average life expectancy of the counter tube: at 10mSv/h approx. 17500 h Response time: 4 s Overload capacity: > 50 Sv/h (continuous radiation) *After effect: negligible with exposure to 100 times the final reading. Housing: aluminium housing, silver anodised protection class IP 67 Dimensions: 40 mm Ø x 126 mm Weight: approx. 120 g * These values have been checked by the PTB (German physical- technical federal institute) as part of the design approval.



En

erg

y d

epen

den

ce o

f th

e re

spo

nsi

ven

ess

Pro

be

1850

9 D

E

Mid

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y



6.3.1.3 γ- Doserate probe 18 529 DE



Measuring size: photon-equivalent dose rate * Nominal working range of the photon energy: 80 keV-2,0 MeV, max. measuring error = 30 % Optimum direction: radial radiation onto the probe body. Detector dimensions: internal diameter: 4,8 mm effective length: 8 mm housing thickness: 80-100 mg/cm² size: 16 x 6,2 mm Ø Position of detector in device: The detector is positioned axially in

the centre of the probe. Position of reference point: The reference point is identified by a ring-like

marking on the probe housing. *Nominal working range of the temperature: operation: - 30 °C till + 60 °C storage: - 40 °C till + 70 °C



Indication ranges: automatic range switch following indication ranges: 1 0,0 - 99,9 µSv/h 2 100 - 999 µSv/h 3 1,00 - 9,99 mSv/h 4 10,0 - 99,9 mSv/h 5 100 - 999 mSv/h 6 1,00 - 9,99 Sv/h

*Measuring ranges: 1 100 - 999 µSv/h 2 1,00 - 9,99 mSv/h 3 10,0 - 99,9 mSv/h 4 100 - 999 mSv/h 5 1,00 - 9,99 Sv/h

Average life expectancy of the counter tube: at 10mSv/h approx. 55000 h Response time: 16 s Overload capacity: > 500 Sv/h (continuous radiation) *After effect: negligible with exposure to 100 times the final reading. Housing: aluminium housing, blue anodised, protection class IP 67 Dimensions: 40 mm Ø x 126 mm Weight: approx. 120 g * These values have been checked by the PTB (German physical- technical federal institute) as part of the design approval.



6.3.2 Count probes 6.3.2.1 Universal probe 18504 D Detector: ZP 1401, window counter tube window : mica thickness : 1,5 - 2 mg/cm² effective diameter : 9 mm effective surface : 0,635 cm² shielding by protection grid: 20 %

Background : approx. 10 cpm

Counts in case of radial incident radiation (Cs 137) approx. 2 cps / µSv/h

Axial incident radiation: with cap: only ? -radiation without cap: a-,ß-and ?-radiation Temperature range: operation: - 30 °C till + 60 °C storage: - 40 °C till + 70 °C Nominal working range for outside air pressure: 500-1300 hPa, influence cannot be de-

termined in practical use. Transport in planes up to 3000 m hight: Changes in air pressure have to be performed slowly.

Housing: aluminium housing, black anodised

Dimensions: 40 mm ∅ x 126 mm

Weight: approx. 130 g



6.3.2.2 Smear test probe 18536 D Detector: ZP 1451, window counter tube window: mica thickness: 1,5 - 2 mg/cm² effective diameter: 27,8 mm effective surface: 6,1 cm² shielding by protection grid: 20 %

Background : approx. 9 cpm


Axial incident radiation: with cap: only ? -radiation without cap: a-,ß-and ?-radiation

Temperature range: operation: - 30 °C till + 60 °C storage: - 40 °C till + 70 °C

Nominal working range for outside air pressure: 500-1300 hPa, influence cannot be de-


Housing: aluminium housing, gold anodised





6.3.2.3 Low dose probe 18526 D Detector: ZP 1451, window counter tube window: mica thickness: 1,5 - 2 mg/cm² effective diameter: 27,8 mm effective surface: 6,1 cm² shielding by protection grid: 20 %

Background: approx. 9 cpm


Axial incident radiation: with cap: only ? -radiation without cap: a-,ß-and ?-radiation

Temperature range: operation: - 30 °C till + 60 °C storage: - 40 °C till + 70 °C

Nominal working range for outside air pressure: 500-1300 hPa, influence cannot be de-


Housing: aluminium housing, red anodised





6.3.2.4 Large-area plastic scintillation detectors

Detector type: zinc sulphide coated plastic scintillator with magnetically shielded photomultiplier

Detektor dimensions: 170 cm²: 170 x 100 x 1 mm³ 300 cm²: 240 x 130 x 1 mm³

Coupling: via air - reflector

Nominal working range for outside air pressure: 100-1300 hPa, influence negligible

? < 100 hPa/h

Nominal working range of the temperature: operation: between 10 °C and 40 °C storage: between 0 °C and 50 °C

Dimensions: 170 cm²: 280 mm x 125 mm x 135 mm (LxWxH) 300 cm²: 318 mm x 157 mm x 172 mm (LxWxH)

Weight: approx. 0.8 kg

Detector voltage: approx. 1100 Volt



7 Attestation of conformity For the following described product:

SCINTO Doserate meter with scintillation detector

is hereby confirmed, that this product fulfils the protection re-quirements as described in the EC Directive Electromagnetic Tolerance (89/336/EWG). To evaluate the product concerning electromagnetic toler-ance, the following European standards have been applied: EN 55 011 (Class B) EN 61 326 –A1 EN 61 326 –1 (Class B) This statement is made with responsibility for the manufacturer:

S.E.A. GmbH Strahlenschutz-Entwicklungs- und Ausrüstungs-Gesellschaft Ostdamm 139 D 48 249 Dülmen

Dülmen, January 26th, 2005



8 Concluding remark The SCINTO has been manufactured with utmost care. Neverthe-less, errors cannot be ruled out entirely. We would therefore appreci-ate your comments and proposals for improvements. We are happy to help you if you encounter problems in working with this instrument. Please send a letter, fax or mail to: S.E.A. GmbH

Ostdamm 139

D-48249 D Ü L M E N

Phone : +49 2594 - 9424 -35

Fax : +49 2594 - 9424 -14 Email : [email protected] Homepage: http://www.sea-duelmen.de





9 Factory test protocol 1“ x 1.5“ Device no.: Detector :

DR (target) DR (actual) max ± 20%

200 nSv/h nSv/h 1000 nSv/h nSv/h 10 µSv/h µSv/h 100 µSv/h µSv/h 400 µSv/h µSv/h

Overflow > 500 µSv/h Alarm thresholds:

DRT I CPS I DRT II CPS II DRT III CPS III

Scope of supply:

Signature: Date:

• RS 232 cable Software: • Rapid charge unit • External probe Type: • Probe cable





9 Factory test protocol 1.5“ x 2“ Device No.: Detector :

DR (target) DR (actual) max ± 20%

200 nSv/h nSv/h 1000 nSv/h nSv/h 10 µSv/h µSv/h 100 µSv/h µSv/h

Overflow > 200 µSv/h

Alarm Thresholds:

DLT I CPS I DLT II CPS II DLT III CPS III

Scope of supply :

Signature: Date:

• RS 232 cable Software: • Rapid charge unit • External probe Type: • Probe cable

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