Polimaster BDG1-PM1403 Operation Manual Download Page 38

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Appendix A

(reference)

Standard dependence of the upper limit of the measuring range of DER of gamma radiation energy

Eγ scintillation detection channel



100

120

500

1000

1500

2000

2500

3000

3500

Energy gamma radiation Е

, keV

Figure A.1

Summary of Contents for BDG1-PM1403

Page 1: ...GAMMA RADIATION DETECTION UNIT BDG1 1403 OPERATION MANUAL...

Page 2: ...DG1 14 6 1 Switch BDG1 On Off 14 6 2 Operability control BDG1 16 6 3 Connect BDG1 to PC 16 6 4 BDG1 operation 17 6 4 1Photon radiation DER measurement mode 17 6 4 2Scintillation spectrum registration...

Page 3: ...examination as well as other necessary information for correct instrument operation and full utilization of its capabilities BDG1 is documented as follows according to state standard of manufacturer c...

Page 4: ...de isotope compositions measure DER of gamma radiation search of ionization sources so that to prevent unauthorized transfer of radioactive sources and materials Instrument is as well used by speciali...

Page 5: ...bar 1 1 Clamp 1 1 Handle 1 1 Cable 2 1 5 m 1 1 Cable 2 2 0 25 m 1 1 Cable 3 1 Certificate 1 Data storage Software Operation Manual2 1 1 Packaging 3 1 1 Supplied by user request by separate order 2 Ve...

Page 6: ...ceeded discontinuous signal 3 5 Threshold level setting discreteness unit of least significant indicated bit Setting range of DER thresholds from 0 01 to 100 Sv h 3 6 Energies range of registered phot...

Page 7: ...han 0 25 Sv h detects standard radioactive sources SS and alternative gamma sources according to Table 3 1 1 with probability more than 0 5 Table 3 1 1 Source type Parameter name 133 Ba 137 Cs 60 Co G...

Page 8: ...BDG1 is resistant to radiofrequency electromagnetic fields test level 4 30 V m within frequencies range 80 1000 Hz from 800 to 960 Hz and from 1 4 to 2 5 GHz when there is electromagnetic emission of...

Page 9: ...ze no more than 290x70 3 35 Reliability values mean time between failures no less than 20000 hours mean life time no less than 10 years mean recovery time no more than 60 min Manufacturer guarantees i...

Page 10: ...eral BDG1 construction Front panel bears 1 LED yellow BDG1 testing mode indication green BDG1 calibration mode indication 2 Sound audio alarm for sound alarms when set thresholds levels are exceeded 3...

Page 11: ...the BDG1 geometrical effective center 2 4 2 Handle Telescopic extension bar BDG1 is equipped with a handle Figure 4 1 to enable convenient operation and a telescopic extension bar to enable access to...

Page 12: ...cessing of measurement results rapid adaptation to radiation intensity changes measurement time is inversely proportional to the radiation intensity Data communication channel enables information exch...

Page 13: ...d mechanical injuries corrosive substances organic solvents open fire sources 5 2 BDG1 power BDG1 is powered from BDOI or PC USB POWER LED on the BDG1 front panel starts blinking Figure 4 1 position 4...

Page 14: ...ront panel of BDG1 Figure 4 1 position 1 1 emits sound audio alarm when set DER DE thresholds are exceeded 2 ALARM LED for alarming 3 BAT LED for On Off state indication or BDOI charging 4 GPS receive...

Page 15: ...of the MENU 4 MODE BACK OK open the list of BDOI operation modes Exit or return to the previous operation mode or option Directional pad keys 5 UP 6 DOWN vertical cursor scrolling along menu options...

Page 16: ...1 switches off when the cable is disconnected from it or after BDOI is switched off To switch BDOI off press key ON OFF and wait till the BDOI switches off 6 2 Operability control BDG1 Switch on BDG1...

Page 17: ...beginning Filling of the scale means the end of the calibration At the end of the calibration BDG1 enters the search mode of photon radiation sources 1 2 Figure 6 4 6 4 1 Photon radiation DER measurem...

Page 18: ...rement mode menu enables following functions Figure 6 5 Clear Statistic start of the count rate and DER measurement Save To History save the history to the BDOI memory Sound On Off audible alarm on of...

Page 19: ...e relative value of the measured count rates Figure 6 7 1 2 3 Figure 6 7 Pink scale Figure 6 7 1 means that average count rate of gamma channel is low Low Count Rate less than 200 cps Low gamma channe...

Page 20: ...ar materials medical industrial natural View Library view the radionuclides library Set Absorber To obtain more reliable results of the radionuclide composition identification it is necessary to enter...

Page 21: ...display the identification result in the upper LCD area If gamma channel load is less or more than stated one then the instrument will take more time to identify During spectrum accumulation the lower...

Page 22: ...ously measured DER values in Sv h mSv h Sv h or R h mR h R h Figure 6 11 1 1 2 Figure 6 11 Count rate current value is compared with the threshold calculated in the calibration mode If the count rate...

Page 23: ...To localize RS place BDG1 near the tested object at a distance of no more than 10 cm Move the instrument alongside the object no faster than 10 m s The closer RS is the faster the signals repetition r...

Page 24: ...Figure 10 12 5 FWHM First point Width at half height of first calibration point in keV Recommended initial value is 38 0 for 122 keV energy Energy First point First calibration point energy Recommend...

Page 25: ...25 1 2 3 4 5 6 Figure 6 12...

Page 26: ...ty and reliable operation during its long service life Preventive maintenance includes external examination dust removal and deactivation if radioactive dust gets on BDG1 To deactivate BDG1 wipe it wi...

Page 27: ...DE LED doesn t light when BDG1 is connected to BDOI or PC Cable is faulty BDOI or PC is switched off Replace the cable Switch BDOI or PC on 2 Sound alarm doesn t work Sound is OFF Detector is faulty S...

Page 28: ...ton radiation DER permissible intrinsic relative error 9 8 3 1 9 8 3 3 9 8 3 5 Yes Yes Yes Yes Yes Yes estimation of the neutron radiation DER permissible intrinsic relative error 9 8 3 7 Yes Yes esti...

Page 29: ...reference sources calibration no more than 4 9 8 3 2 9 8 3 4 9 8 3 2 9 8 3 4 Thermometer Scale interval 1 0 Measurement range 10 40 9 6 1 9 6 1 Barometer Scale interval 1 0 kPa Measurement range 60 12...

Page 30: ...rnal examination must prove that instrument meets following requirements delivery kit corresponds to Operation Manual requirements there is a note in the Operation Manual about primary verification or...

Page 31: ...l center of the detector is marked by sign on instrument s surface Switch BDOI on 4 at set statistical error value of less than 10 take five DER measurement readings at an interval of at least 60 s wh...

Page 32: ...e MENU button and record accumulated spectrum into BDOI memory under the selected number as specified in Operation Manual chapter 11 11 5 send accumulated spectrum to PC according to the chapter 11 11...

Page 33: ...ation mode according to the chapter 11 1 5 of the Operation Manual 3 place gamma sources 137 Cs and 57 104 105 Bq from the reference spectrometric gamma sources set of OSGI 3 type at such a distance f...

Page 34: ...switch BDOI on switch DE measurement mode on and set maximal DE thresholds value 2 place BDG2 on the verification assembly so that geometrical center of the detector coincides with the reference point...

Page 35: ...ent error Qj using the Formula oj oj ijB j H H H Q 9 13 6 calculate permissible limits of intrinsic relative measurement error at confidence probability 0 95 using the Formula 2 max 2 max 2 3 j j o s...

Page 36: ...insic relative error add calculated using the Formula 20 A add 9 19 where coefficient equal to 10 min 1 cm 2 measured value of radiation flux 9 8 3 9 Calculate intrinsic relative measurement error of...

Page 37: ...at confidence probability 0 95 using Formula 9 18 Verification results are considered positive if values of confidence limits of intrinsic relative measurement error of radiation flux density of BDAB...

Page 38: ...ard dependence of the upper limit of the measuring range of DER of gamma radiation energy E scintillation detection channel 0 20 40 60 80 100 120 0 500 1000 1500 2000 2500 3000 3500 Energy gamma radia...

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