PM1621/A/M/MA User manual
Contents
1. DE reset mode E threshold press and hold LIGHT SET button for 5s Second DE threshold flashing press and hold LIGHT SET button for 5s First DE threshold flashing Press LIGHT SET button flashing threshold number Press LIGHT SET button flashing Press LIGHT SET r ashing button Press LIGHT SET MODE button Press LIGHT SET button DE reset Press LIGHT SET button flashing Press LIGHT SET flashing button press and hold LIGHT SET button for 5s DE measurement mode press and hold press and hold LIGHT SET button LIGHT SET button for 5s for 5s Figure 2 3 Setting the DE threshold values 23 DER measurement mode press and hold LIGHT SET button for 5s First DER threshold LIGHT SET LIGHT SET flashing button LIGHT SET button ncn IAA LI press and hold LIGHT SET button for 5s flashing Second DER threshold flashing threshold number Press LIGHT SET LIGHT SET button Press LIGHT SET flashing Dutton LIGHT SET button press and hold LIGHT SET button for 5s Figure 2 4 Setting the DER threshold values 24 press and hold LIGHT SET button flashing flashing press and hold LIGHT SET button Figure 2 5 Indication of audio alarm state on off adjustment of sound volume of PM1621M PM162. During manufacturing of the dosimeter some changes may be introduced in its electrical scheme and construction that do not influence the specifications and metrological parameters and therefore may be not specified in this manual 1 DESCRIPTION AND OPERATION OF THE DOSIMETER 1 1 Application Range Dosimeter is designed for continuous measurement of the personal dose equivalent further dose equivalent or DE of external gamma and X ray further photon radiation H 10 continuous measurement of the time of the DE accumulation continuous measurement of the personal dose equivalent rate of external photon radiation 10 further dose equivalent rate or DER communications of information accumulated and stored in a non volatile memory through infra red IR communication channel the protocol is compatible with IrDA interface into the personal computer PC using the internal or external IR adapter Dosimeter is manufactured in four models X ray and gamma radiation personal dosimeter PM1621 X ray and gamma radiation personal dosimeter PM1621A Differs from PM1621 model by extended DER measurement range X ray and gamma radiation personal dosimeter PM1621M Differs from PM1621 model by search mode and integrated vibro and light alarm X ray and gamma radiation personal dosimeter PM1621MA Differs from PM1621 model by extended DER measurement range search mode and integrated vibro and light alarm
3. gr 29 5 6 Pre verification proce due o ode et pep rie td suba quod an aaa so adbeast eaves 29 of Verification procedure come Se tad eme heed a Rta cl eau e me ACA d 29 5 7 1 External examination of the instrument esee nnns 29 5 7 2 Carrying out verification 5 29 5 7 3 Metrological examination 29 6 STORAGE AND SHIPPING Oe e ebd 32 Z WATISRANID S mec ne Ecc Exe IUE M te Saas Lo Me 33 ATTACHMENT A Typical instrument anisotropy data are normalized to the calibration direction O 34 ATTACHMENT B Diagram of dosimeter rotation to measure angular 35 ATTACHMENT Overall dimensions effective center of the dosimeter 36 This Operating Manual combined with the logbook and passport describes the design operation and use of the X ray and gamma radiation personal dosimeter PM1621 PM1621A PM1621M PM1621MA further dosimeter or instrument The Operating Manual includes the general description specifications of the dosimeter as well as some other information necessary for the proper operation of the dosimeter and a full realization of its possibilities
4. The dosimeters may be used independently or as a part of a system for everyday efficient and emergency dosimetric control of the personnel and people at sites production facilities and units where there is a potential or real risk of exposure to external X ray and gamma radiation by officers of customs and border services personnel of nuclear facilities radiological and isotope laboratories officers of the emergency services civil defense fire brigades police as well as in other spheres of use where there is a necessity in measurement of the personal dose equivalent and personal dose equivalent rate alarming of the exceeding of the preset dose and dose rate levels information about the dose accumulation and conduct of the dose rate in time as well as association of the measured parameters with an individual systematization and complex analysis of the accumulated dosimetric information Operating conditions ambient air temperature from 40 up to 60 C relative humidity up to 98 at the temperature 35 C pressure from 84 up to 106 7 kPa Attention LCD will still continue to indicate the readings when the instrument is heated up 50 C 1 2 Delivery kit 1 2 1 Delivery kit of the dosimeter corresponds to the Table 1 1 Table 1 1 uere IE dosimeter PM1621 t o dosimeter PM1621A P CT MERECE ERN CANNE dosimeter PM1621M emos 2 dosimeter PM1621MA Accessories set IR channel adapte
5. 7 2 Warranty operation period is 18 months since the date the instrument putting into operation If there is no mark on instrument putting into operation then the warranty period will be started from the date of warranty shelf life end 7 3 The warranty period is 6 months since the date of manufacturer Quality Control Department accepting the instrument 7 4 Warranty and after warranty repairs are performed by the manufacturer or by a company authorized by the manufacturer 7 5 Warranty does not cover the instruments subjected to the user s service the instrument was tampered opened by the user with mechanical damages if the requirements of operation and storage were not satisfied without the operation manual if their warranty period is expired 7 6 The warranty period is extended for a period of warranty repair 7 7 Warranty doesn t cover the batteries The battery replacement is not considered as the warranty repair 33 reference Typical instrument anisotropy data are normalized to the calibration direction 0 0 15 7 307 15 30 7 Figure 1 for horizontal installation at the phantom rotation vertical plane 1 59 5 keV 2 Cs 662 keV 3 Co 1250 keV 15 0 15 30 TTT Figure A 2 for vertical installation at the phantom rotation in horizontal plane 1 59 5 keV 2 Cs 662 keV 3 Co 1
6. it nile where H i th dosimeter reading when measuring DER in j th tested point 6 repeat measurements for points where reference DER value is 80 0 800 uSv h At that three segments of analogue scale must be indicated if DER is 80 0 uSv h and four segments if DER is 800 uSv h 7 move the dosimeter on the dosimetric unit so that geometrical center of the detector coincides with the reference point where reference DER value is 8 0 mSv h 8 expose the dosimeter to irradiation at that five segments of analogue scale must be indicated 9 wait at least 60 s after exposure start then take 5 DER measurement readings at 20 s interval at least and then calculate average DER value by H by formula 5 2 10 repeat the measurement for the reference point where reference DER value is 80 mSv h At that six segments of analogue scale must be indicated 30 11 when using PM1621A PM1621MA dosimeters repeat measurements according to article 9 for the reference point where reference DER value is 800 0 mSv h At that seven segments of analogue scale must be indicated 12 calculate relative measurement error Qj by formula a 100 Ho Q 5 3 where Hy reference DER value in the tested point H average DER value in the tested point average DER value of gamma background in uSv h equal to 3 0 80 0 and 800 0 uSv h and average DER value of gamma background in mSv h when reference D
7. basis of audio vibro and light LED blinking alarm signal frequency changes search mode on off search mode on off state indication 20 21 22 23 24 25 26 27 28 29 Sound pressure level at distance of 20 cm for PM1621M PM1621MA no less Power supply Period of continuous operation of the dosimeter from one battery using LCD backlight not more than 20 s day audible alarm not more than 20 s day and at an average value of the measured DER up to 0 3 uSv h at a temperature from 0 up to 60 at a temperature minus 40 C at least Protection degree of the dosimeter s case The dosimeter is proof against the action of The dosimeter is proof against The dosimeter meets drop test against a concrete surface from the height The dosimeter is proof against the action of static and variable magnetic fields of strength 85 dB A 1 5 0 1 minus 0 4 V one AA type battery 12 months 6 months IP67 temperature of an ambient air from minus 20 up to plus 60 with indication of measurement results on LCD temperature of an ambient air from minus 40 up to minus 20 C without indication of measurement results on LCD but with recording of measurement results in a non volatile memory relative humidity of an ambient air up to 98 at 35 atmosphere pressure from 84 up to 106 7 kPa sinusoidal vibration in the frequency range 5 35 Hz and bias amplitu
8. exiting it 6 the MODE button for selecting the dosimeter s indication mode DER DE the dosimeter s number PC communication 7 light alarm outlet 8 LCD 9 IR transceiver window 10 detector 11 screw cover of battery compartment A direction of calibration and the detector effective center relative to which the factory calibration is performed are placed at a 15 mm distance from the dosimeter detector s surface Attachment C The total surface density of the walls surrounding the detector is 1 g cm that provides the detector shielding from the background beta radiation PM1621M and PM1621MA dosimeters are equipped with removable clip to be worn on belt See Figure 1 3 for the way to demount the clip from the dosimeter body Dosimeter can be supplied with protective case made from synthetic fabric so that user can wear it on the belt Polimaster recommends demounting the clip when wearing dosimeter in protection cover 12 m fum Figure 1 2 General overview of the dosimeter Figure 1 3 Demounting the clip from PM1621M and 1621 2 USE OF THE DOSIMETER 2 1 General guidelines When purchasing the dosimeter it is necessary to check the delivery kit chapter 1 2 1 and the proper operation of the instrument in all the operation modes chapter 2 4 Protect the instrument from shocks and mechanical damages Avoid exposing the dosimeter to hostile environments organic solvents a
9. 21MA dosimeter 25 3 MAINTENANCE 3 1 Maintenance involves preventive services battery replacement and regular performance check according to 2 4 3 2 4 5 3 2 Preventive services include external examination dusting and decontamination in the event of radioactive contamination For decontamination wipe the case of the dosimeter using a cloth wetted with ethanol 3 3 Battery replacement unscrew and remove the cover of the battery compartment remove the old battery insert the new battery observing the polarity the sign of the battery should be inwardly directed fix the cover of the battery compartment in its place After the battery is replaced the LCD will display all segments and then the dosimeter should enter the measurement mode All the previous measurements and parameters necessary for proper operation of the dosimeter are stored in its non volatile memory NOTE Insert a new battery before sending a dosimeter for calibration 26 4 TROUBLESHOOTING The list of possible problems and their solutions are specified in the table 4 1 Table 4 1 Problem Possible cause 1 The LCD indicates bAt Battery discharge Replace the battery message 2 No indications on the LCD Battery discharge Replace the battery Battery is inserted Insert the battery in the proper incorrectly way 3 The Dosimeter does not Microprocessor error Remove the battery and insert respond to pressing conditio
10. 250 keV 34 Diagram of dosimeter rotation to measure angular response 4 MS radiation beam 4 Figure B 1 Diagram of dosimeter rotation in horizontal plane LO radiation dn beam 4 Figure B 2 Diagram of dosimeter rotation in vertical plane Overall dimensions effective center of the dosimeter detector i Graduation direction J radiation source 15 mm 87 mm NR ZG f MA 41 7mm Effective center of the detector Figure C 1 36
11. ER is 8 0 80 0 800 0 mSv h 13 calculate the error confidence limit of the dosimeter with the confidence probability 0 95 under test by formula 1 1 Q Qin 5 4 where uncertainty of the reference dosimeter assembly 96 Qimax maximum measurement error of all Qj values 96 14 compare the calculated value amp with an acceptable value calculated by formula 15 0 0015 0 01 H 5 5 where H DER value mSv h 0 0015 coefficient mSv h 0 01 coefficient mSv h The dosimeter passes the test if 5 5 7 3 2 DE measurement main relative measurement error is calculated as follows 1 set maximum DER and DE threshold levels on the dosimeter and switch on DE measurement mode 2 do actions described in 5 7 3 1 2 3 read initial DE value from the dosimeter 4 move the dosimeter on the dosimetric unit so that geometrical center of the detector coincides with the reference point where reference DER value from the reference gamma source Cs is 3 0 uSv h and irradiate the dosimeters during T time equal to 60 min 5 read end DE value from the dosimeter when irradiation is over 6 calculate main relative DE measurement error Q in percents by formula Hy Hyg Qu x100 5 6 where H end DE value mSv initial DE value mSv reference DER value in the tested point mSv h T irradiat
12. R values averaging Off Thresholds setting enable On Audible alarm On DE measurement mode On On a display 2 figure 1 2 DE values output On a display 3 output of DE accumulation time values in thousands hours symbol h is indicated at DE accumulation time less than a thousand hours On a display 4 output of DE accumulation time values in hours On On a display 4 output of the values of time remaining for staying at the working place Off Thresholds setting enable On DE reset On Audible alarm On Dosimeter s number indication mode On On a display 2 figure 1 2 dosimeter s number On a display 3 month of the dosimeter s production On a display 4 year of the dosimeter s production Audible alarm On Search mode On Audio alarm indication mode On Vibro alarm indication mode On 2 4 2 Selection of an indicated parameter Modes of DER DE dosimeter s number and data transmission to PC indication are switched on by a successive pressing of the MODE button figure 2 1 and 2 2 The dosimeter allows switching on off all the above mentioned indication or measurement modes Change of the configuration is performed in the mode of data transmission to PC 2 4 3 DER measurement mode In the DER mode figure 2 1 and 2 2 the following values are indicated on the LCD DER uSv h mSv h Sv h DER on the analogue scale in a logarithmic gauge seven segments statist
13. Scale interval 0 1 C Measurement range Procedure name Stopwatch Range of measurement from 1106005 Dosimeter 06 Main error 15 Another EN dosimeter allowing required s accuracy can be used A plane parallel phantom from PMMA dimensions 30x30x15 cm can be used cw 0 55 _ Hydrometer Measuring range 30 90 per errors 5 3 Verification officers qualification requirements Only persons certified as state verification officers in accordance with established procedure are allowed to conduct measurements during verification and or analyze measurement results 5 4 Safety requirements 5 4 1 Obligatory safety requirements for verification any works with radioactive sources must be done according to state and local safety instructions for radioactive sources and other ionizing radiation sources valid at the verification site 5 4 2 Verification process must be referred to working under harmful labor conditions 28 5 5 Verification conditions Verification requires following conditions ambient air temperature 20 5 relative air 60 20 30 atmospheric 101 3 5 4 15 3 kPa ambient gamma radiation no more than 0 2 uSv h 5 6 Pre verification procedure Pre verification requires following preparatory procedures carefully read current Operation Manu
14. X RAY AND GAMMA RADIATION PERSONAL DOSIMETERS PM1621 Models PM1621 PM1621A PM1621M PM1621MA OPERATING MANUAL 5 1 DESCRIPTION AND OPERATION OF THE DOSIMETER 4 To APOC ACN Range ieu eoe d bo do ete toasts ite a t is uii ind 4 1 2 Delivery KI s se Se cox ER Rc eno ndi c Rs RR 5 13 Specifications aad iit pleni or pate e ote ep RaSh LIMES 6 1 4 Design and theory of operation celo Ge rita 11 2USEOFTHE DOSIMETER ates step tiere LC Bas rM 15 2 General guidelines oH Tbe tri Pa uia iA Ud CH piu tuia AET AS EE TN ccu 15 2 2 Safety Ins IPUCTONS 15 2 3 Preparation FON USO evite seu ee 15 ZA the dosiBler nite cech d eG e Paste dp 15 S MAINTENANC E toda Aube Ne MR 26 4 TROUBLESHOOTING oii t e pectet ME a 27 SVERIFICATION METHOD e qut R R NAAR 28 S MI odio In E E a a 28 5 2 Verification procedures and tools sse eterne 28 5 3 Verification officers qualification requirements sss 28 54 Safety requirements ie ei ei cote eo deti o este ea ans cee ies 28 5 5 Verification conditions Lug uei potero tod
15. a exchange 0 1 uSv h 100 mSv h 0 1 uSv h 1 00 Sv h 0 01 9 99 uSv h 10 0 99 9 uSv h 100 999 uSv h 1 00 9 99 mSv h 10 0 99 9 mSv h 100 200 mSv h PM1621 PM1621M 100 999 mSv h PM1621A PM1621MA 1 00 2 00 Sv h PM1621A PM1621MA Number of indicated segments from left to right corresponds to the following DER threshold values on the LCD display one segment gt 1 0 mSv h two segments gt 10 mSv h three segments 2 100 mSv h four segments gt 1 0 mSv h five segments 2 10 mSv h six segments 2 100 mSv h PM1621 1621 seven segments gt 1 0 Sv h PM1621A PM1621MA 15 K H K2 96 where H DER value mSv h K4 coefficient 0 0015 mSv h coefficient 0 01 mSv h 1 0 uSv 9 99 Sv t 15 0 01 uSv 9 99 Sv 0 01 9 99 uSv 10 0 99 9 100 999 uSv 1 00 9 99 mSv 10 0 99 9 mSv 100 999 mSv 1 0 Sv 9 99 Sv 1h 8 The dosimeter provides inputting storage in non volatile memory and continuous control of two DER and DE threshold levels within the whole measurement range various audible alarms as well as vibro and light alarms additionally for PM1621M PM1621MA at exceeding of the preset first and second threshold levels Discreteness of threshold level setting Unit of lower order indicated position 9 Registered energy range 10 keV 20 MeV Energy r
16. al make instrument ready for operation according Chapter 2 3 of the current Operation Manual 5 7 Verification procedure 5 7 1 External examination of the instrument When doing external examination be sure that the instrument corresponds to the following requirements instrument delivery kit corresponds to Operation Manual requirements there is initial verification mark in the Operational Manual or certificate of the last verification there are clear markings on the instrument s surface there is no dirt and mechanical damages that can influence instrument operation Instrument is considered as not valid for further verification if it doesn t meet the above requirements 5 7 2 Carrying out verification testing Testing requires following check instrument operability according to Chapter 2 4 of current Operation Manual set maximum threshold levels of personal dose equivalent rate 10 further DER and personal dose equivalent H 10 further DE according to Chapter 2 4 5 of current Operation Manual 5 7 3 Metrological examination 5 7 3 1 DER measurement main relative error is calculated as follows 1 switch on DER measurement mode 2 fasten the dosimeter on the phantom so that This side to body inscription faces the phantom Place the dosimeter with phantom onto the verification dosimetric unit so that the normal line from the geometrical center of phantom s front wall coincides with the c
17. bol bat The battery is to be replaced 3 3 In case of the battery critical discharge approximately lt 0 9 V the dosimeter will turn into the DE measurement mode the symbol bat will become solid the dosimeter will stop the measurements LCD backlight and audible alarm will become locked The battery is to be replaced 3 3 20 DER measurement mode PC communication mode switched off DER averaging time press coefficient press MODE variation LIGHT SET button MODE DE accumulation button ime Number indication the mode dosimeter s number year of production month of production press MODE button Figure 2 1 Select the PM1621 PM1621A dosimeter operating indication mode 21 DER measurement mode PC communication mode DER switched off switched on Press m LIGHT SET LJ J C pSvh button 051 DER averaging time press coefficient press and hold MODE variation MODE MODE button button button DE measurement mode Press LIGHT SET nct nn wu h press MODE DE accumulation button une the Press I dosimeter s LIGHT SET mode button number year of production month of production press MODE Press button LIGHT SET button press MODE button Figure 2 2 Select the PM1621M PM1621MA dosimeter operating indication mode 22 DE measurement mode i Z 1 1 msv
18. d dosimeter mode of data transmission to PC search mode for PM1621M and PM1621MA mode of audio alarm state indication mode of vibro alarm state indication for PM1621M PM1621MA partial or critical battery discharge indication mode settings mode audible alarm mode at the exceeding of the preset DE or DER thresholds as well as ibis and light alarm mode for PM1621M and PM1621MA additionally The dosimeter s non volatile memory ensures storage of the following values when replacing the battery for the moment of the battery s removal accumulated dose DE DE accumulation time DE and DER accumulation history preset DER and DE thresholds values When using the dosimeter in a temperature range from 40 up to 20 C the Dosimeter provides performance of the dosimetric functions without displaying the result of measurement on LCD When returning the dosimeter into conditions with a temperature higher than 20 LCD operates in a normal way The dosimeter performs continuous DER and DE measurement DE accumulation time counting in all modes excluding an active mode of data transmission to PC Ir on Standard configuration of the dosimeter when shipping ensures indication of the following parameters and functions performed DER measurement mode On On a display 2 figure 1 2 DER values output On a display 3 output of statistical error values 9o Off On a display 4 output of DE
19. de for frequencies lower than the transition frequency 0 75 mm shocks with acceleration 100 m s duration of shock pulse 2 50 ms shock rate is 60 180 shocks per minute 0 7 m up to 400 A m The dosimeter is proof against the action of radio frequency electromagnetic fields up to 30 V m in the frequency range from 80 to 1000 MHz from 800 to 960 MHz from 1 4 to 2 5 HHz of strength in electromagnetic emission envoronment of digital radiophone the dosimeter is proof against the action of electrostatic discharges test level 3 air discharge 8 kV contact discharge 6 kV performance criterion B dosimeter corresponds electromagnetic compatibility state standard of manufacturing country EN 55022 1998 class B requirements by the level of emitted radio noise The dosimeter in a transport package is proof against the action of temperature from minus 50 up to plus 50 C humidity up to 100 96 at 40 shocks with acceleration 98 m s duration 16 ms vibrations with frequency 5 35 Hz and bias amplitude 0 75 mm 9 30 Weight no more PM1621 PM1621A 0 165 kg PM1621M PM1621MA 0 185 kg Weight in package not more than 0 4 kg 31 Overall dimensions no more not more than 87x72x39 mm 32 Reliability parameters average full operating time no less than 20000 h average service life no less than 10 years average time of recovery no more than 60 min Note For addition information about dosimeter plea
20. entral axis of collimator of verification dosimetric unit Central axis of collimator of verification dosimetric unit must go through geometrical center of detector of the dosimeter being tested figure 5 1 Geometrical center of detector is stated in the dosimeter s Operation Manual 29 Phantom Irradiation direction Detector geometrical center Figure 5 1 The way for dosimeter with phantom be placed on the verification dosimetric unit 3 calculate an average value of measured gamma radiation ambient background DER further gamma background when there is no reference radiation source To do it wait no less than 600 s from the moment the instrument was placed on the dosimetric equipment and then take 5 DER measurement readings at 150 s interval no less Then calculate average DER meaning of gamma background H by formula 5 1 One segment of analogue scale must be indicated as 5 H S n 5 1 i l where H i th meaning of gamma background DER measurement uSv h 4 move the dosimeter on the dosimetric unit so that geometrical center of the detector coincides with the reference point where reference DER value is 3 0 uSv h and expose the dosimeter to irradiation At that two segments of analogue scale must be indicated 5 wait at least 100 s after exposure starts then take 5 DER measurement readings at 60 s interval at least Then calculate average DER value H by formula 5 5 2 1
21. esponse relative to 0 662 MeV Cs no more than 3096 10 Coefficient of variation deviation of the 11 dosimeter s readings caused by statistic fluctuations at DER measurement at a confidence coefficient 0 95 no more than t 1096 Anisotropy type dependence is given in Attachment A of the Dosimeter for each energy does not exceed values in presented in Table 1 2 when the Dosimeter is rotated in the horizontal plane Attachment B figure B 1 and values in 96 presented in Table 1 3 when the Dosimeter is rotated in the vertical plane Attachment B figure B 2 Table 1 2 Energy of gamma radiation MeV Angle of detection relative to Anisotrop the direction of graduation 0 059 0 662 p 0 1 v0r j Energy of gamma radiation MeV the direction f graduation P Anisotropy a 0 059 0 662 12 Maximum permissible additional relative error of DER measurement at temperature variations from minus 40 to plus 60 C 1096 at relative humidity of ambient air 98 at 35 1096 at power voltage variations from nominal value to limiting voltage values 5 13 14 15 16 17 18 19 exposure to magnetic field of 400 A m strength on exposure to radio frequency electromagnetic fields of 30 V m strength LCD backlight at pressing LIGHT SET button Instability of readings during 24 hour continuous work no more than Response time when DER value is increased
22. ical error in percents averaging time of DER values Range of the averaging time indication is from 1 up to 2999 s If the averaging time exceeds 2999 s the symbols are indicated on the LCD If the measured DER value is over the upper limit of the DER indication range 200 mSv h for the PM1621 PM1621M and 2 0 Sv h for PM1621A PM1621MA the LCD will show the overload symbol OL and non continuous audible signal will sound In the DER mode the collected statistics of DER measurement can be reset and the process of measurement can be reactivated by simultaneous pressing of the LIGHT SET MODE buttons 2 4 4 DE measurement mode In the DE mode figure 2 3 the following values are indicated on the LCD DE uSv mSv Sv DE accumulation time DE and DE accumulation time reset is possible in the set mode by simultaneous pressing of the LIGHT SET MODE buttons figure 2 3 In the mode of data transmission to PC it is possible to set an inhibit for DE reset using the buttons There are two methods of measurement of the DE accumulated over a certain period of time The first method recommended In the beginning of measurement the DE should be reset using the keys or the PC and the user software supplied on CD Then the dose displayed at the end of the period will be the dose accumulated over the period of measurement The second method The dose value in the beginning of the period of measurement should be deducted from
23. interface System requirements to a computer A PC not lower than Pentium III 1 GB free HDD space printer and unit for operation with IrDA protocol for the exchange of information with the Dosimeters are necessary for comfort program running The program runs under OS Windows 2000 XP VISTA Windows 7 2 4 7 2 For using the dosimeter in the mode of data transmission to PC it is necessary to read the user software supplied on CD connect the adapter of IR communication channel to a PC COM port using the adapter built in a PC shall be permitted install the unit of IrDA communication in the system and switch on the IR connection in the mode of searching external IR connection devices install the user software supplied on CD to PC orient the dosimeter and adapter of IR communication channel of the PC by placing the dosimeter at a distance of 10 20 cm from the adapter of IR channel choose the mode of data transmission to PC using the MODE button figure 2 1 press and release the LIGHT SET button for PC link startup through IR channel perform readout of the dosimeters information following the program s instructions 2 4 7 3 Allow or prohibit operation modes parameters of dosimeter PM1621M PM1621MA DER measurement DER coefficient variations indication indication of DER averaging time DE measurement DE accumulation time indication indication of counter of the left time of
24. ion obtained to the LCD The IR communication channel provides an exchange of information with PC The dosimeter has an internal non volatile memory that allows the information accumulation and storage Secondary power supply provides transformation of the battery s voltage 1 5 V into a stable voltage 3 0 V necessary for the dosimeter s power supply 1 4 2 The Dosimeter is designed as a unit housed in a plastic shock proof case General overview of the dosimeter and its parts are shown in Figure 1 2 Indication elements positions 1 4 are on the LCD 8 1 DER analog scale seven segments for effective control over radiation situation analog scale four segments sound pressure level indicator in the search mode 2 DER digital panel in DER measurement mode DE in DE measurement mode year of production in the dosimeters number indication mode indication of IR communication channel switch on off in the PC communication mode 3 digital panel of indication of statistical error in percents in DER measurement mode DE accumulation time indication in thousands of hours h in DE measurement mode month of production in the dosimeter s number indication mode 4 digital panel of indication of time of averaging DER values in seconds in DER measurement mode of DE accumulation time in DE measurement mode 5 the LIGHT SET button for switching on LCD backlight switching on PC communication mode entering the set mode and
25. ion time in hours 7T repeat measurements 1 6 for the reference point at DER value equal to 80 0 mSv h during T time equal to 30 min 8 verification results are considered positive if DE measurement error results for all tested points Qj don t exceed 15 96 31 6 STORAGE AND SHIPPING 6 1 Dosimeters in package may be shipped by any kinds of closed transport at the air temperature from 50 to 50 6 2 Dosimeters in package should be arranged and fastened in the transport so that their stable position is ensured and shocks are avoided 6 3 When carried by sea Dosimeters in package should be placed in hermetic plastic bags with silica gel 6 4 When carried by air Dosimeters in package should be placed in hermetic compartments 6 5 Dosimeters should be stored in the manufacturer s package at the air temperature from 15 to 50 and air relative humidity up to 95 at temperature of 35 6 6 Dosimeters without package to be stored at the air temperature from 10 to 35 and relative humidity up to 80 at temperature of 25 6 7 The storage place should be free of dust vapors of strong chemicals aggressive gases and other substances that may cause corrosion 32 7 WARRANTY 7 1 The manufacturer warrants this instrument to meet specifications provided that the user follows the instructions for the operation of the instrument shipping and storage described in the Operation manual
26. more than 10 times from initial low DER value to finite fixed high DER value exceeding 10 wuSv h no more than Response time when DER value is decreased more than 10 times from initial high to finite fixed low DER value exceeding 10 uSv h no more than PC communication In the mode of data transmission to PC the dosimeter provides the following functions In the search mode the dosimeter PM1621M PM1621MA enables following functions 5 5 3 5 s 5 10s by a special program using IR communication channel adapter 1 permission or prohibition the following be displayed on LCD DER or DE photon radiation measured value indication relative mean square error of average value of measurement result with 0 95 probability statistical error in percents dosimeter number blind dosimeter 2 reading from PC into dosimeter and storing in instrument s non volatile memory the following information dosimeter serial number history of DE and DER accumulation at user set time periods DE DER values when set thresholds are exceeded as well as time date and month when set thresholds where exceeded DE and DER set thresholds values service information 3 following information is recorded from PC to dosimeter values of DE and DER thresholds being set current date and time for DE accumulation history operation modes detect and locate the photon radiation sources on the
27. n it again in 5 min button the LCD indicates incorrect symbols 4 The LCD indicates Er1 Dosimeter failure Send the Dosimeter for repair Er7 to the manufacturer s maintenance center Note If a defective battery is used the Er1 Er7 message may appear Attention When the Er1 Er7 message appears press any button When the error message appears for the second time approximately in 15 minutes the dosimeter is considered not suitable for operation 27 5 VERIFICATION METHOD 5 1 Introduction Current verification procedure covers PM1621 PM1621A PM1621M and PM1621MA further dosimeters and scheduled dosimeters verification Verification is done by local state metrological services Gosstandart state standard of manufacturer country and correspondingly authorized companies Verification is done by the manufacturer on the site after repair while in service and storage with 12 months periodicity 5 2 Verification procedures and tools Verification requires the following procedures and tools stated in the Table 5 1 Table 5 1 Verification procedure Name of reference and auxiliary measurement tools their chapter main characteristics number P HN MEER NN examination Teig 872 O Metrological 5 7 3 1 Calibration assembly with Cs source Certified Ay Arai ation 573 2 uncertainty of calibration assembly must be no more than 5 at confidence probability 0 95 E 120 kPa Thermometer
28. n to PC it is possible to set an inhibit for changing the threshold levels using the buttons In case of exceeding the value of the first second DER DE threshold the dosimeter turns correspondingly into the DER DE measurement mode and noncontinuous frequent noncontinuous audible signal will sound When DER value decreases below the preset threshold the audible signal will shut off Press any button to silence the alarm sound The audible signal will shut off 17 automatically in approximately 60 5 the repeated audible signal will sound in approximately 4 min 2 4 6 The dosimeter s number indication mode In the dosimeter s number indication mode the following items are indicated on the LCD the dosimeter s number on a display 2 year 4 and month 3 of production 2 4 7 Mode of data transmission to PC 2 4 7 1 The dosimeter allows storing and transmitting to PC a history further history of DE DER accumulation events of exceeding the preset DE and DER threshold values event of DE reset trough IR communication channel using the buttons Selection of the events to be stored in the history frequency of these recordings is performed under a special program History data are inaccessible without IR adapter internal or external The dosimeter performs data transmission to PC under the user software supplied on CD through the adapter of IR communication channel over the communications protocol compatible with IrDA
29. nd open fire 2 2 Safety instructions During the dosimeter adjustment checking repair maintenance and verification if the radioactive sources are used the regulations for work with radioactive materials and other radiation sources as well as Standards of radiation safety should be followed 2 3 Preparation for use 2 3 1 It is necessary to study all sections of the present operating manual before using the dosimeter 2 3 2 Unpack the dosimeter 2 3 3 Switching on unscrew the battery compartment s cover using the screwdriver insert the battery observing the polarity batterys electrode marked with should be directed inside the dosimeter fix the battery compartment s cover in its place Right after inserting the battery the dosimeter performs LCD testing all the segments and graphic symbols should be displayed for about 2 s and then disappear then the dosimeter should enter the measurement mode One minute after inserting the battery the dosimeter is ready for use 2 3 4 Place and fix the dosimeter detector outwards on a breast pocket of overalls or inside it Attention If the dosimeter is expected to be used under conditions when the dose rate value is higher than 0 1 mSv h it is recommended to insert a new battery 2 4 Use of the dosimeter 2 4 1 Dosimeter operation modes photon radiation DER measurement mode photon radiation DE measurement mode dosimeter s number indication mode blin
30. presence on the work place depending in current measured DER and DE values dosimeter number indication audio alarm setting DER and DE threshold values using buttons reset DE using buttons 2 4 7 4 Read out from dosimeter to PC the following information PM1621M PM1621MA dosimeter parameters DER history and DE accumulation date time event value DE value DER at the moment of set threshold exceeding as well as time date and month when set thresholds were exceeded values of set DE and DER thresholds service information 2 4 7 5 Record from PC into dosimeter the following information PM1621M PM1621MA dosimeter parameters DE and DER threshold values recording interval of DER history and DE accumulation current time and date for generating DE accumulation history service information 2 4 8 Search mode PM1621M PM1621MA In the search mode the dosimeter enables functions of detection and localization of gamma radiation sources GRS See figure 2 2 for the way to switch search mode on When first DER threshold level is exceeded GRS are detected audio light and vibro alarms rate will increase as the dosimeter is being moved closer to GRS When limiting frequency is reached the dosimeter will emit continuous audio alarm At single pressing of LIGHT SET button the frequency of audio light and vibro alarms can be decreased that improves dosimeter s detection power when it ge
31. r Power supply element PANASONIC POWER LINE LR6 AA or Power supply element Energizer L91BP 2 AA Operating manual oo o 1 1 1 SE D AK SS ee 1 1 P Supplied by customer request by separate order Used within the temperature range of minus 20 plus 60 Usage of other batteries with similar parameters is allowed Used within the temperature range of minus 20 plus 60 Usage of other batteries with similar arameters is allowed Methods of calibration are included Supplied on agreement with a customer buyer 1 3 Specifications 1 Operating mode 2 DER measurement range a A for PM1621 PM1621M for PM1621A PM1621MA DER indication sub ranges DER analogue scale seven segments in a logarithmic gauge Maximum permissible intrinsic relative error of DER measurement DE measurement range Maximum permissible intrinsic relative error of DE measurement DE indication range Indication sub ranges Discreteness of DE accumulation time indication measurement of photon radiation DER measurement of photon radiation DE indication of settings search for PM1621M PM1621MA indication of partial and critical battery discharge audio and additionally for PM1621M PM1621MA light and vibro alarm activation when DE or DER thresholds are exceeded indication of the dosimeter s number blind dosimeter PC dat
32. se visit www polimaster com 1 4 Design and theory of operation 1 4 1 The dosimeter comprises the following main blocks and modules radiation detector microprocessor LCD secondary power supply IR transceiver non volatile memory The block diagram of the dosimeter is shown in Figure 1 1 Alarm Backlight Control audible vibro driver buttons and light Radiation LCD detector Microprocessor DAC of temperature compensaton High voltage power supply IR Secondary power supply transceiver Battery Quartz 1 5 V RAM generator Figure 1 1 Block diagram of the dosimeter A Geiger Muller tube with a filter for spatial energy formation of sensitivity which converts photon radiation quanta to electric pulses is used as a radiation detector The detector has a high voltage power supply The microprocessor controls the dosimeter s operating modes backlight driver audible alarm driver infrared communication channel LCD non volatile memory high voltage power supply of the detector operates the control buttons performs all the necessary calculations self diagnostics The dosimeters operating algorithm ensures continuity of the measurement process statistical processing of the measurement results a prompt adaptation to the variation of level of the photon radiation dose rate setting the time of measurement in inverse dependence on the dose rate and effective output of the informat
33. the DE value displayed at the end of the period In the DE mode the indication figure 1 2 display 3 and 4 of values of time remaining for staying at the working place depending on the current measured DER and DE values is possible Calculation of time is performed relative to the second preset DE threshold the function may be switched on at the DE measurement mode configuration 2 4 5 Settings mode Auxiliary mode of settings figure 2 4 is meant for verification and or setting of the threshold DE DER values DE and DE accumulation time reset Attention To enter the set mode press and hold for about 5 s the LIGHT SET button and the parameter to be set will be flashing To choose the parameter press and release the LIGHT SET button To change the set parameter rapidly press and hold the MODE button for exact setting press and release the MODE button The dosimeter will exit the set mode by pressing and holding the LIHGT SET button or automatically in approximately 90 s Inputting the DER DE threshold levels into the memory This procedure can be performed in the DER DE measurement mode as well as in the mode of data transmission to PC DER DE thresholds are inputted during DER DE measurement on the LCD Enter the settings mode by pressing and holding the LIHGT SET button figure 2 4 Input successively the first and then the second threshold levels Exit the set mode In the mode of data transmissio
34. ts closer to GRS Another pressing the LIGHT SET button resets the frequency of audio light and vibro alarms to initial state When second DER threshold level is exceeded dosimeter emits frequent discontinuous audio light and vibro alarms When doing localization of GRS place the dosimeter so that dosimeter s effective center attachment C figure C 1 faces the tested object Hold the dosimeter at the distance of the tested object no more than 10 cm Move the dosimeter alongside the tested object no faster than 10 cm s 2 4 9 Indication mode of audio alarm state PM1621M PM1621MA In the indication mode of audio alarm state figure 2 2 the dosimeter enables following functions audio alarm on off indication when audio alarm is on off adjust audio alarm sound pressure figure 2 5 indicate sound pressure level as analogous scale and digitally from 1 to 4 Level 1 one line corresponds to minimum sound level and level 4 four lines corresponds to maximum sound level 2 4 10 Indication mode of vibro alarm state PM1621M PM1621MA In the indication mode of vibro alarm state Figure 2 2 the dosimeter enables following functions vibro alarm on off indication when vibro alarm is on off 2 4 11 Partial or critical battery discharge indication mode The dosimeter controls battery discharge once in 10 minutes In case of the battery partial discharge approximately lt 1 1 V the LCD will indicate the flashing sym
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