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
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 Issue 2005/01 E, subject to technical changes without notice page 3
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 doserate measurements covering the range of the environmental background 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 functions of the measuring instrument can be learned and looked up quickly and easily: beginning with the explanation of all basic functions, followed by a detailed description of parameter possibilities, e. g. programming of freely adjustable alarm levels or record of measured 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! Issue 2005/01 E, subject to technical changes without notice page 4
2 Principle of measurement The decay of radio-nuclides is accompanied by the emission of radiation, e.g. gamma rays (photons). These photons are measured by a detector which converts each photon into an electrical signal. Scintillator 1 Light reflector Secondary electronics multiplier 2 3 to amplifier Photocathode 4 1 2 3 4 Radiation Light flash Electrons electrical pulse 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. Issue 2005/01 E, subject to technical changes without notice page 5
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 energy range from approx. 25 kev up. Issue 2005/01 E, subject to technical changes without notice page 6
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 parameterized 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 in ratemeter mode 1 * 7,5 * 25 µsv/h 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. Issue 2005/01 E, subject to technical changes without notice page 7
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 intelligent 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 after 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 replaced. With a battery voltage less than 2.1 V, the battery symbol is shown during measurement. battery voltage Issue 2005/01 E, subject to technical changes without notice page 8
5 Operation of the SCINTO NaI detector LC-display 128 x 64 pixels sound exit for internal loudspeaker socket for external detectors On/Off button Quick menu Down button (menu) Enter button (menu) button Illumination + Special functions (shown on display) socket for charging and RS 232 interface Up button (menu) charging control light battery lock screw position of the batteries in the compartment Issue 2005/01 E, subject to technical changes without notice page 9
5.1 OPERATING FUNCTIONS 5.1.1 Menu overview The program structure of the SCINTO as a diagram: Start screen Continuous measurem. Display illumination Store measurement (*) Quick menu Single pulses Acoustic alarm Unit cps / Sv/h Stored data records Main menu Turn off Request for code Alarm thresholds Probes- alarm thresh. Averaging Meas. value memory Other parameters Meas. start selection Probe selection Dynamic Ring memory Parameters Stored data records Code change Alarm threshold setting View data records Date / Time Set CPS alarm Set DR alarm Delete last record Illumination duration Keyboard beep Delete all records Automatic menu end Print stored data records Language (*)only if selected in Main menu Issue 2005/01 E, subject to technical changes without notice page 10
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 On/Off button Quick menu arrow button selection down illumination / function button Enter button arrow button selection up 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 function button is shown right below. selected menu item (invers) shows possible functions button function button Issue 2005/01 E, subject to technical changes without notice page 11
The parameters are set according to the following scheme: 1. Parameters which can be activated or deactivated are displayed in square brackets. If the parameter is deactivated, the position between the brackets is empty [ ]. If the parameter 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 activated 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. Issue 2005/01 E, subject to technical changes without notice page 12
5.1.4 Alarm threshold setting To set an alarm threshold, the following steps are required: Start screen Measuring Quick menu Main menu Request for code Alarm thresholds Doserate alarm thesholds Alarm thresh. I,II,III 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 desired value by using the arrow buttons. 8. Store the new value of the alarm threshold with Enter. alarm threshold(s) Enter button to store the new alarm threshold value Display: Alarm threshold: 1, 2 or 3 Activated: If an alarm threshold is exceeded, an audible alarm will be triggered. 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. CPS - alarm thresholds Alarm thresh. I,II,III alarm threshold activated function button: select next digit Issue 2005/01 E, subject to technical changes without notice page 13
5.2 START SCREEN The start screen provides an overview of the software status, the battery voltage and indicates possible system malfunctions. company name device serial number device name battery voltage software version 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 Issue 2005/01 E, subject to technical changes without notice page 14
5.3 MEASUREMENT DISPLAY After the device has been turned on and the start screen has appeared, the instrument automatically switches to the measuring mode. The SCINTO starts its measurement process using the parameters defined last time. selected measuring mode active alarm threshold current value as digital reading defined alarm threshold unit (cps, µsv/h) analogical display 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 Issue 2005/01 E, subject to technical changes without notice page 15
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. acoustic counts on/off view, print or delete stored values turn off device 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 acoustic alarm after exceeding threshold switch from cps to (µ)sv/h call Main menu close Quick menu The SCINTO can also be turned off by pushing the On/Off button one more time in the Quick menu End of Quick menu Select the desired menu item Change a selection or continue with a submenu item Issue 2005/01 E, subject to technical changes without notice page 16
5.4.1 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) To get the values displayed also in the Quick menu, the function Values-> Quick m. (see 5.5.2.4.1) has to be activated. Only the last data record is deleted shows possible button functions Display: View data records: Last record delete: All records delete: shows stored measurement values All stored values are deleted. closes the submenu Stored data records shows stored values deletion of the last dataset (e.g. after a false measurement) deletion of complete database Button functions: No function Return to Main menu Select the desired menu item Continue with a submenu item Issue 2005/01 E, subject to technical changes without notice page 17
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. chart heading date and value of measurement shows possible button functions shows the selected memory position closes the measuring value chart 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 Issue 2005/01 E, subject to technical changes without notice page 18
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: measured value date and time of measurement shows possible button functions selected memory position defined unit closes the display of measurement values 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 Issue 2005/01 E, subject to technical changes without notice page 19
5.4.1.2 Delete data records To avoid the lost of data, the system asks to confirm the deletion before the data are actually deleted. selected function: delete last data record shows possible button functions menu heading security question before deletion aborts the deletion Display: Menu heading Security question before deletion Button functions: No function Aborts the deletion No function Confirms the deletion Issue 2005/01 E, subject to technical changes without notice page 20
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. The access code on delivery is: 0000 The digit that can be changed is flashing. shows the buttons to be pushed Push this button to select the next digit to be changed. Display: Access code Button functions: No function Select next position Change value of selected digit 9..0 and 0..9 Confirm code Issue 2005/01 E, subject to technical changes without notice page 21
5.5.2 Main menu Setting of the system parameters submenu for parameter setting of probe alarm thresholds submenu Averaging submenu Storage shows possible button functions submenu for alarm threshold settings setting of display illumination, access code and date/time closes the menu 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 Select the desired menu item Continue with a submenu item Issue 2005/01 E, subject to technical changes without notice page 22
5.5.2.1 Alarm threshold settings Selection of the alarm thresholds to be set doserate alarm thresholds count alarm thresholds shows possible button functions closes the menu 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 Select the desired menu item Continue with a submenu item Issue 2005/01 E, subject to technical changes without notice page 23
5.5.2.1.1 Doserate alarm thresholds To set an alarm threshold, the following steps are required: Startbild Messbetrieb Kurzmenü Haupmenü Codeabfrage Warnschwellen Dosisleistungs - Warnschwellen Warnschwelle I,II,III 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. 2. With the function button every digit can be selected and set to the desired value by using the arrow buttons. 3. Store the new value of the alarm threshold with Enter. alarm threshold(s) Enter button to store the new alarm threshold value alarm threshold activated function button: select next digit Display: Alarm threshold: 1, 2 or 3 Activated: If an alarm threshold is exceeded, an audible alarm will be triggered. 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 Confirm new alarm threshold Issue 2005/01 E, subject to technical changes without notice page 24
5.5.2.1.2 Count alarm thresholds To set an alarm threshold, the following steps are required: Startbild Messbetrieb Kurzmenü Haupmenü Codeabfrage Warnschwellen Impuls - Warnschwellen Warnschwelle I,II,III 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. 2. With the function button every digit can be selected and set to the desired value by using the arrow buttons. 3. Store the new value of the alarm threshold with Enter. alarm threshold(s) Enter button to store the new alarm threshold value alarm threshold activated function button: select next digit Display: Alarm threshold: 1, 2 or 3 Activated: If an alarm threshold is exceeded, an audible alarm will be triggered. 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 Issue 2005/01 E, subject to technical changes without notice page 25
5.5.2.2 Probe alarm thresholds Selection of the probe to be set probe type selection shows possible button functions closes the menu 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 Close the submenu return to the Main menu Select the desired menu item Continue with a submenu item Issue 2005/01 E, subject to technical changes without notice page 26
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 change function with Enter. The first digit of the number to be changed is blinking now. 2. With the function button every digit can be selected and set to the desired value by using the arrow buttons. 3. Store the new value of the alarm threshold with Enter. probe type Enter button to activate the change function alarm threshold alarm threshold activated closes the menu 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 Close the submenu return to the Main menu Select the desired menu item Activate the edit mode Issue 2005/01 E, subject to technical changes without notice page 27
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 detector 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 intensity, however, remains unknown, since you cannot choose an infinitely long period of observation. The average value becomes an exact value only if the period of observation is infinite. When interpreting 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 distribution. 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 significant 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 particles per second which are registered by a detector in 1-second cycles. The statistical variability for ± 1 σ (sigma) is: 100 = ± 10 counts. Issue 2005/01 E, subject to technical changes without notice page 28
If a large number of measuring cycles are evaluated, the following relationship becomes apparent: Number of Measured values Standard deviation cycles in % from to (± 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 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; however, 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. Issue 2005/01 E, subject to technical changes without notice page 29
5.5.2.3.2 Ring memory dynamic average calculation average determination with ring memory shows possible button functions Display: Display: dynamic: The ring memory quantity is calculated and set automatically by means of the count rates. A dynamic smoothing procedure 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 measuring 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 ring memory quantity closes the average setting End of menu item in input mode: next position Change selected digit Confirm input Issue 2005/01 E, subject to technical changes without notice page 30
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. parameter setting of the measuring value storage view or delete stored values shows possible button functions closes the menu item Measuring value storage 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 Issue 2005/01 E, subject to technical changes without notice page 31
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 deactivating. acitvates the measuring value storage the stored values can be viewed and deleted in the Quick menu shows possible button functions meaning of the function button 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 Issue 2005/01 E, subject to technical changes without notice page 32
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) Only the last data record is deleted. shows possible button functions Display: shows stored measuring values All stored values are deleted closes the submenu stored data records 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 Issue 2005/01 E, subject to technical changes without notice page 33
5.5.2.5 Other parameters Setting of the system parameters date / time setting parameter setting: menu escape time language selection shows possible button functions change access code display illumination time setting volume setting for button operation closes the menu Display: Change code: The access to the Main menu is protected by a 4-digi 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 Select the desired menu item Continue with a submenu item Issue 2005/01 E, subject to technical changes without notice page 34
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 The digit that can be changed is flashing. Shows the buttons to be pushed Push this button to select the next digit to be changed. Display: access code for Main menu Button functions: No function Select next position Change value of selected digit 9..0 and 0..9 Confirm code Issue 2005/01 E, subject to technical changes without notice page 35
5.5.2.5.2 Date / Time setting In order to assign a correct date and time for the measurement results of the measurement value storage, the SCINTO is equipped with a battery-operated clock. The clock does not switch from summer- to wintertime and vice versa automatically. This has to be done manually. current system time The digit that can be changed is flashing shows possible button functions changed time meaning of the function button Display: current: display of current system time digits: display of the modified time Button functions: No function Select next position Change value of selected digit 9..0 and 0..9 Confirm new system time Issue 2005/01 E, subject to technical changes without notice page 36
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. no automatic illumination turn off shows possible button functions automatic turn off time for automatic turn off return to last menu item 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 Issue 2005/01 E, subject to technical changes without notice page 37
5.5.2.5.4 Keyboard beep To adapt the operation of the SCINTO to different fields of application, 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. no sound when pushing button shows possible button functions quiet or loud sound when pushing button closes menu item 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 Issue 2005/01 E, subject to technical changes without notice page 38
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. automatic return: short time shows possible button functions automatic return: long time automatic return: off meaning of the function button 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 Issue 2005/01 E, subject to technical changes without notice page 39
5.5.2.5.6 Language The SCINTO offers the possibility to select one of currently three languages. language selection shows possible button functions meaning of function button 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 Issue 2005/01 E, subject to technical changes without notice page 40
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 Issue 2005/01 E, subject to technical changes without notice page 41
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 Issue 2005/01 E, subject to technical changes without notice page 42
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 front left 5 0 % 1 0 0 % right position of device: horizontal reference energy E = 662 kev Issue 2005/01 E, subject to technical changes without notice page 43
6.2.2 Energy dependence 100 80 60 40 20 q/q0 0-20 -40-60 1000 k -80-100 Photon energy (KeV) 0 300 600 900 1200 1500 Photon Energie [kev] 6.2.3 Diagram to convert count rate values into dose rate values (Cs-137) 100 k ont rate mpuls/s 10 k 1k 100 0.1 q = 1 10 DL [µsv/h] actual value set point q = value of q at reference energy (E = 662 kev) 10 100 1000 Issue 2005/01 E, subject to technical changes without notice page 44
6.2.4 Photomultiplier 6.2.4.1 Data sheet Issue 2005/01 E, subject to technical changes without notice page 45
6.2.4.2 Spectral range 6.2.4.3 Amplification vs. voltage Issue 2005/01 E, subject to technical changes without notice page 46
6.2.4.4 Diagram counts / channel 6.2.4.5 Temperature coefficient of the anode sensitivity Issue 2005/01 E, subject to technical changes without notice page 47
6.2.4.6 Dimensions 6.2.4.7 Socket wiring Issue 2005/01 E, subject to technical changes without notice page 48
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 g- 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 waterproof 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 Issue 2005/01 E, subject to technical changes without notice page 49
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: Overload capacity: 4 s > 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: Weight: 40 mm Ø x 126 mm approx. 120 g * These values have been checked by the PTB (German physicaltechnical federal institute) as part of the design approval. Issue 2005/01 E, subject to technical changes without notice page 50
Energy dependence of the?-probe 18550 DE Energy dependence of the responsiveness Probe 18550 DE Nr.: 66002 Middle energy Issue 2005/01 E, subject to technical changes without notice page 51
6.3.1.2 g- Doserate probe 18 509 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: 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 Issue 2005/01 E, subject to technical changes without notice page 52
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: Weight: 40 mm Ø x 126 mm approx. 120 g * These values have been checked by the PTB (German physicaltechnical federal institute) as part of the design approval. Issue 2005/01 E, subject to technical changes without notice page 53
Energy dependence of the responsiveness Probe 18509 DE Middle energy Issue 2005/01 E, subject to technical changes without notice page 54
6.3.1.3 g- Doserate probe 18 529 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: 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 Issue 2005/01 E, subject to technical changes without notice page 55
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: Weight: 40 mm Ø x 126 mm approx. 120 g * These values have been checked by the PTB (German physicaltechnical federal institute) as part of the design approval. Issue 2005/01 E, subject to technical changes without notice page 56
6.3.2 Count probes 6.3.2.1 Universal probe 18504 D Detector: Background : 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 % 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 determined in practical use. Transport in planes up to 3000 m hight: Changes in air pressure have to be performed slowly. Housing: Dimensions: Weight: aluminium housing, black anodised 40 mm x 126 mm approx. 130 g Issue 2005/01 E, subject to technical changes without notice page 57
6.3.2.2 Smear test probe 18536 D Detector: Background : 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 % approx. 9 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 determined in practical use. Transport in planes up to 3000 m hight: Changes in air pressure have to be performed slowly. Housing: Dimensions: Weight: aluminium housing, gold anodised 40 mm x 126 mm approx. 140 g Issue 2005/01 E, subject to technical changes without notice page 58
6.3.2.3 Low dose probe 18526 D Detector: Background: 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 % approx. 9 cpm Counts in case of radial incident radiation (Cs 137) approx. 4 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 determined in practical use. Transport in planes up to 3000 m hight: Changes in air pressure have to be performed slowly. Housing: Dimensions: Weight: aluminium housing, red anodised 40 mm x 126 mm approx. 160 g Issue 2005/01 E, subject to technical changes without notice page 59
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: Detector voltage: approx. 0.8 kg approx. 1100 Volt Issue 2005/01 E, subject to technical changes without notice page 60
7 Attestation of conformity For the following described product: SCINTO Doserate meter with scintillation detector is hereby confirmed, that this product fulfils the protection requirements as described in the EC Directive Electromagnetic Tolerance (89/336/EWG). To evaluate the product concerning electromagnetic tolerance, 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-Entwicklungsund Ausrüstungs-Gesellschaft Ostdamm 139 D 48 249 Dülmen Dülmen, January 26 th, 2005 Issue 2005/01 E, subject to technical changes without notice page 61
8 Concluding remark The SCINTO has been manufactured with utmost care. Nevertheless, errors cannot be ruled out entirely. We would therefore appreciate 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 : info@sea-duelmen.de Homepage: http://www.sea-duelmen.de Issue 2005/01 E, subject to technical changes without notice page 62
Issue 2005/01 E, subject to technical changes without notice page 63
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 DRT II DRT III Scope of supply: RS 232 cable Software: Rapid charge unit External probe Type: Probe cable Signature: CPS I CPS II CPS III Date: Issue 2005/01 E, subject to technical changes without notice page 64
Issue 2005/01 E, subject to technical changes without notice page 65
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 DLT II DLT III Scope of supply : RS 232 cable Software: Rapid charge unit External probe Type: Probe cable Signature: CPS I CPS II CPS III Date: Issue 2005/01 E, subject to technical changes without notice page 67 66