PM-1703M Gamma Radiation Paging Device
Contents
1. which allows efficient detection of nuclear materials When the PM1703M operates at temperatures below 15 the LCD normal operation can not be guaranteed In this case the audio and or vibration alarm devices only should be used to detect radiation sources When the normal conditions with temperatures higher than 15 are restored the LCD will resume its normal operation The PM1703M is provided with a clip and may be fasten to the belt The clip may be removed using a screwdriver see Fig 2 A carrying case is also available as an option THI P 412114 004 01 Fig 2 The PM1703M with a removable clip THI P 412114 004 01 Detection of gamma sources When detecting gamma radiation sources the instrument should be held so that the audio alarm device is directed onto the scanned object When detecting gamma radiation sources under conditions when the audible signals produced by the instrument are not heard for example are damped by noise the vibration alarm device should be used The efficiency of detecting gamma radiation sources is the higher the closer is the unit to the scanned object article person container vehicle etc and the smaller is the velocity of its movement along the object It should be remembered that both a sensitivity of the instrument and a rate of false alarms depend not only on the preset coefficient n for more details see section Theory of Operation but also on the back2. CsI TI scintillator with a photodiode a plate of amplifier shaper The scintillator photodiode assembly transforms gamma quanta to electric pulses that come to the input of the amplifier shaper The amplifier shaper converts electric signals coming from the photodiode output to quasi Gauss pulses that come at the input of the processing block The processing block consists of processor module non volatile memory module LCD module control buttons IR transceiver power supply module The processor module is based on a 16 bit RISC processor and performs testing of the instrument every time as it is turned ON mathematical processing of data obtained control over all the operation modes output of the data processing results to the LCD control over the operation of the audio and vibration alarm devices battery voltage control A non volatile memory module is designed to store the PM1703M operation history that involves current values of the count rate in data storage intervals cases when the alarm threshold is exceeded cases of background updating time when the unit is turned ON OFF THI P 412114 004 01 Detector Processing Vibration alarm device Power supply module Fig 3 Block diagram of the PM1703M 20 THI P 412114 004 01 The non volatile memory of the unit stores the following parameters the number of an unit information
3. ON OFF Press and release the MODE button once again The LCD will display 2 The figure 2 indicates the vibration alarm device and on shows that the vibration alarm device is ON Press the LIGHT button to change the status of the vibration alarm device ON OFF The unit will exit from this mode if the MODE button is pressed or automatically if no button is pressed for 6 seconds THI P 412114 004 01 6 2 Communication with PC In addition to parameters mentioned above the PM1703M has the next factory settings by default e password 1 e data storage interval 60 min e count time in the background updating mode 36 s e count time in the search mode 2 s An application program should be used to configure your PM1703M according to your requirements and site regulations An application program PM1703 M EXE is supplied on the installation CD together with an IR adapter available as an option Minimum requirements to a computer and its software PC 486 66 MHz 8 Mb RAM Windows 95 98 2000 small font 2 Mb free on the hard disk and an adequate space available to install the database 800X600 resolution of a monitor Connect the cable of an IR adapter to a communication port of the personal computer The PM1703M may be switched to this PC communication mode by pressing the LIGHT button To load the application program run the program SETUP EXE and follow the instructions User s Man
4. about the audio or vibration alarm devices turning ON OFF the preset value of the coefficient n the current time and date the preset successive intervals in that the current count rate values are stored in the non volatile memory of the instrument count time in the background updating mode count time in the search mode The LCD module is designed to display the information about the self test the unit operation modes and registered values The LCD module also contains a control circuit of the luminescent backlight which is turned ON OFF under the control of the processor module and is done by the LIFHT button The IR transceiver is designed to make possible an exchange of information of the PM1703M with PC The power supply module is a built in power source including a battery and voltage transformers and electronic switches that are controlled by the processor module and supply the necessary voltage to the instrument blocks The audio alarm device is designed to produce audible sound in the se f test and search modes In the search mode a rate at which audible tone repeats will increase when the unit comes nearer to a gamma radiation source The vibration alarm device is designed to produce signals that the operator senses as vibrations inside the case of the unit when the se f test mode is completed or when the alarm threshold is exceeded in the search mode In the search mode a rate of pulsation will increase when the unit
5. comes nearer to a gamma radiation source It allows a secret search for gamma radiation sources and is good in situations when sound tones are damped by noise The audio or vibration alarm devices can be turned ON OFF using software in the PC communication mode or manually using the buttons if the set mode is enabled The PM1703M operates in the following modes e self test mode e search mode e background updating mode e dose rate mode 21 TUT P 412114 004 01 e set mode e PC communication mode Self test mode The PM1703M will go into this mode immediately after it is turned ON and the LCD will display the message test The following tests are performed LCD test detector block test processor test non volatile memory test alarm device test The time left until the self test completion is indicated in the relative units on the analog scale shown in decreasing a number of indicated segments After the self tests are completed the audio or vibration alarms will be activated for approximately 1 second and the unit will go into the background updating mode Background updating mode The unit will automatically go into this mode when the se f test mode is completed and the LCD will display the message CAL calibration In the background updating mode the analysis of the gamma radiation background value is performed The processor counts pulses coming from the detector block and the analog scale indica
6. tests are completed a number of segments decreases until they completely disappear time left until the background updating is completed a number of segments increases until the scale is completely filled relative value of the count rate excess over the calculated threshold in the case of alarm 6 battery discharge warning sign is indicated when the battery voltage drops below 1 1 V 7 RADIATION sign it is indicated when the instrument alarms 8 coefficient of variation in percent 9 unit of measurement S counts per second cps in the search mode uSv h in the dose rate mode 3 4 Overview of the operation modes The PM1703M operates in the following modes self test mode background updating mode search mode dose rate mode set mode PC communication mode e The instrument will go into the self test mode immediately after it is turned ON and the LCD displays test Time left until the self test completion is indicated in the relative units on the analog scale with a number of segments decreasing e After the self tests are completed the audio and or vibration alarms are activated for approximately 1 second the instrument will automatically go into the background updating mode and the LCD will display CAL calibration In this mode the instrument measures the background and calculates the threshold A time since the background updating began is indicated in the relative units on the anal
7. to the manufacturer The LCD displays the battery discharge warning sign Exhausted battery Replace the section 9 3 battery 28 THI P 412114 004 01 11 STORAGE AND SHIPPING 11 1 Shipping Ratemeters in package may be shipped by any kinds of transport at the air temperature from 50 C to 50 C Ratemeters in package should be fastened in a vehicle They must be arranged and fastened in transport so as to ensure their stable position and to avoid possibility of shocks against each other and the walls of a vehicle as well When carried by see ratemeters in package should be placed in hermetic plastic bags with silicagel When carried by air the ratemeters in package should be placed in hermetic compartments 11 2 Storage Ratemeters are to be stored in the manufacture s package at the air temperature from 15 C to 50 C and humidity up to 95 96 at a temperature of 35 C The storage time should not exceed the lifetime of the ratemeter that is 8 years Ratemeters without package are to be stored at the air temperature from 10 C to 35 C and humidity of 80 96 at a temperature of 25 C The storage place should be free of dust vapors of strong chemicals that may cause corrosion 29 THI P 412114 004 01 12 WARRANTY The manufacturer warrants this ratemeter to meet specifications provided that the user observes the guidelines of the ratemeter operation shipping and storage des
8. to the scanned object unchanged The unit will automatically perform the background updating and then the gamma radiation source locating may be continued If necessary this 14 TUT P 412114 004 01 procedure may be repeated several times until a gamma radiation source is located Dose rate indication Press and release the MODE button to switch to the dose rate mode The LCD will display a dose rate uSv h at Cs on the upper scale and a coefficient of variation 96 at 0 95 confidence level on the low scale If during the device operation in the dose rate mode a value of the dose rate exceeds approx 70 uSv h the LCD will display OL While in the dose rate mode the alarm signals are disabled They are automatically enabled after returning to the search mode The PM1703M is calibrated at collimated Cs radiation only Thus its readings in the dose rate mode may differ from readings of energy compensated dosimeters this is not considered to be due to the improper operation of the PM1703M THI P 412114 004 01 6 ADDITIONAL OPERATING INSTRUCTIONS TO THE ADVANCED USER 6 1 Parameters setting The instrument is supplied with the preset parameters and the modes e dose rate mode enabled e set mode enabled e coefficient n 5 e audio alarm device ON e vibration alarm device ON Thus the user may see dose rate values and change the coefficient n value and status of alarm devices using the button
9. ALARMING RATEMETER PM 1703 M OPERATING MANUAL 412114 004 01 THI P 412114 004 01 EU UE KONFORMIT TSERKL RUNG DECLARATION OF CONFORMITY DECLARATION DE CONFORMITE No 4 _ We Wir Nous POLIMASTER Ltd 112 Bogdanovich str 220040 Minsk Belarus declare under our sole responsibility that the product erkl ren in alleiniger Verantwortung da das Produkt d clarons sous notre seule responsabilit que le produit Alarming Ratemeter PM1703M to which this declaration relates is in conformity with the following standard s or other normative document s auf das sich diese Erklarung bezieht mit der den folgenden Norm en oder normativen Dokument en bereinstimmt auquel se r f re cette declaration est conforme la aux norme s ou autre s document s normative s EN 55022 1998 following the provisions of Directive s den Bestimmungen der Richtlinie n conform ment aux dispositions de s Directive s B C 89 336 EEC The tests for compliance with stated above standards have been conducted at Les preuves de conformit aux normes ci dessus cit s ont t faits par Die Pr fung
10. FICATIONS Type of detector CsI TI scintillator Sensitivity at Cs 137 appr 100 cps uSv h Detection of sources Meets the ITRAP requirements Energy range 0 06 3 0 MeV Measurement range of dose equivalent rate at collimated Cs 137 radiation Indication range 0 1 50 nSv h 0 01 70 pSv h Accuracy of dose rate measurements at collimated Cs 137 radiation t 30 Measurement time 0 25 s Count time by default inthe background mode 36s inthe search mode 2s Range of coefficient n used to calculate threshold from 1 to 9 9 step 0 1 Alarm types audio tone and or vibration Power requirements one PANASONIC POWER LINE AA LR6 battery Battery lifetime 800 hours Communication with PC through IR interface Number of readings stored in non volatile memory 900 Environmental temperature range 30 C to 50 C humidity up to 95 at 35 C Water tightness IP65 Drop test 0 7 m on concrete surface Dimensions without clip 87 72 35 mm Weight including the battery 180 g more details about the ITRAP program are available in the ARCS web site at the address http www arcs ac at G or in the POLIMASTER web site at the address http www polimaster com en support docs another non rechargeable battery or a rechargeable battery may be used AA size 1 1 1 6V However battery lifetime and or range of operat
11. Nc K x Tc 3 where Nc is the total number of pulses during count time Tc count time K detector sensitivity is set by the manufacturer during its adjustment in the process of production or when the detector unit is changed While indicating the dose rate the value of the coefficient of variation in percent is displayed on the LCD low scale Set mode While in the set mode the user may perform the following operations to check the preset value of the coefficient n a number of meansquare deviations or to set the new one a range of the coefficient n settings is from 1 to 9 9 in a step of 0 1 to check the current status of the audio and vibration alarm devices or to change it to turn ON or OFF if changing is enabled in the PC communication mode The unit will go into this mode after the button 1 is pressed and fixed for more than 4 s The PC communication mode was described in the section Additional operating instruction to the advanced user 24 THI P 412114 004 01 8 PERFORMANCE EVALUATION The evaluation of the instrument performance includes checking at collimated Cs 137 radiation the dose rate range and accuracy of dose rate measurements the instrument sensitivity This evaluation is performed under the normal conditions stated below Influenced quantity Range of values Temperature 20 C 5 C Atmospheric pressure 101 3 kPa 5 5 kPa 15 3 kPa Relative hu
12. TING 28 11 STORAGE AND SHIPPING sisssscsscescesosocasssseesevesvesecsesessenasdecssoveensee 29 12 WARRANTY oiii oium n rp caress 30 13 ACCEPTANCE CERTIFICATI E eese eee eee een aetas eene sete ee 31 14 WARRANTY CERTIFICATE cssicssssscesesssasssenscaccosssssassssbouesosessosens 32 ATTACHMENT Energy response of the PM1703M eee eene eee nennen nenne 33 THI P 412114 004 01 1 APPLICATION and FEATURES e The alarming ratemeter PM 1703M is designed to search to detect and to locate gamma emitting radioactive sources It may be also used to measure dose rate of collimated Cs 137 gamma radiation e The ratemeter operation history is stored in its non volatile memory and may be transferred to a personal computer through an IR interface e The instrument may be used both indoor and outdoor by various users whose professional duties involve detection and location of radiation sources ONew pager type design OMeets the ITRAP requirements OEasy to use OConfiguration via PC ODose rate indication OShock resistant plastic case OReference to the background OLight weight THI P 412114 004 01 2 PRECAUTIONS Before using this instrument please read this operating manual carefully Take special care to follow the safety instructions listed below e The PM1703M is water resistant but care should be taken to avoid an immersion into water e As with any sensitive electronic ins
13. cribed in the operating manual The warranty period is 18 months since the date of sale The warranty storage period is 6 months since the date of the ratemeter acceptance by the quality control department officer Warranty and after warranty repairs are carried out by the manufacturer or by a company authorized by the manufacturer Warranty does not cover ratemeters which warranty period is expired if the ratemeter was purchased by the user within the limits of the warranty storage period Which were subjected to the user s service the evidence of opening the device with mechanical damages if the requirements of operation and storage were not satisfied Without an operating manual The warranty period is prolonged for a period of warranty repair Warranty does not cover batteries The battery replacement is not considered as the warranty repair 30 THI P 412114 004 01 13 ACCEPTANCE CERTIFICATE The alarming ratemeter PM 1703 M type 412114 004 serial number is manufactured to meet the requirements of State Standards and the design specifications and accepted for operation Head of Quality Control Department stamp place signature name 31 THI P 412114 004 01 14 WARRANTY CERTIFICATE The alarming ratemeter PM 1703 M type 412114 004 serial number 29 is manufactured Manufacturer POLIMASTER Ltd OFFICE Production Department Telephone 375 17 217 70 80 Telepho
14. e device involves preventive treatment battery replacement and regular check up of the ratemeter operation as described in the section 5 1 9 2 The preventive treatment involves external examination of the device dust removing and deactivation in the case of the radioactive contamination Deactivation of the case is done with a tissue impregnated with ethyl alcohol 9 3 To replace a battery e turn the unit OFF e remove a lid 10 Fig 1 ofthe battery compartment using a screwdriver or coin e remove an exhausted battery and insert the new one into the compartment observing the polarity symbols of the battery should be faced inwards of the unit e close the battery compartment with the lid When the battery is replaced the LCD will display all segments and the unit will go into the se f test mode see section 5 1 27 10 TROUBLESHOOTING THI P 412114 004 01 Problem Possible cause Solution In any mode the LCD 1 Detector block failure Send the unit to the displays 00 2 Processing block failure manufacturer In any mode the LCD displays OL Detector block failure 2 Processing block failure 3 A gamma radiation source close to the unit 1 2 Send the unit to the manufacturer 3 Remove the source The audio and or vibration alarm devices are not operating 1 Alarming devices are turned OFF 2 The device devices are not operative 1 Turn the devices ON 2 Send the unit
15. en f r die Konformit t den obengenannten Normen wurden von ARC Seibersdorf research GmbH Minsk February 2002 A A Antonovski Managing Director a d 9123083772 THI P 412114 004 01 CONTENTS 1 APPLICATION and FEATURES 4 2 PRECAUTIONS 5 3 GENERAL DESCRIPTION cccccccsscccccccccesccccsccccescsees 6 SD Introducoh ss sisser ako EO 6 3 2 Delivery KIC uiii tu eue ETE EE AUREAS AE AEE E E Gere Tin 6 3 3 Overview of control buttons and display 7 3 4 Overview of the operation modes 8 d SPECIFICATIONS ER 11 5 OPERATING INSTRUCTIONS TO THE 12 5 1 The unit operation check up 14 eeeee 12 5 2 Searching gamma radiation sources 12 6 ADDITIONAL OPERATING INSTRUCTIONS TO THE ADVANCED USERS 16 6 1 wicluirgsEl2tiirdee 16 6 2 Communication with PC ii ssssiuscsscsascctesnusciedoiasvdsostsacessccvedsnatestadsosass 17 7 DESIGN AND THEORY OF 19 8 PERFORMANCE EVALUATION e eere eene eene neenon see tnato 25 9 MAINTENANCE 27 10 TROUBLESHOO
16. entional true of the dose rate of 12 0 uSv h and 40 0 uSv h The results of checking are considered to be satisfactory if the relative error of indication is in the range from 30 to 30 96 8 2 The check up of the instrument sensitivity Turn the instrument ON turn the audio and vibration alarm devices OFF section 6 1 When the instrument is in the search mode and the value of a variation coefficient becomes less than 5 read the three count rate values of the background in cps Ny in 5 10 seconds Calculate the average background value Ny Place the instrument into the dosimetric verification unit so that the instrument side with the audio alarm device is directed to a source and the conventional true value of the dose rate at the geometrical center of the detector 0 8 wSv h and irradiate the instrument When the value of a variation coefficient becomes less than 5 read the three count rate values in cps in 5 10 seconds and calculate the average value N w Calculate the instrument sensitivity S Nay Hi Repeat the above procedures for the conventional true of the dose rate of 3 0 uSv h and 12 0 n Sv h The results of checking are considered to be satisfactory if the sensitivity is no less than 75 cps uSv h Note At a higher temperate the instrument sensitivity may be by 40 less than the sensitivity at a normal conditions 26 THI P 412114 004 01 9 MAINTENANCE 9 1 Maintenance of th
17. ground value which the instrument stored while in the background updating mode As the changes of the natural background level may be significant it is recommended to perform the background updating just before inspection Press and fix the MODE button when the unit is turned ON and the unit will automatically perform the background updating according to its new level It should be noted that false signals sound or pulsation are not regular and therefore may be easily distinguished from alarm signals produced by the existing gamma radiation source as far as their rate is constant or increases when the unit moves closer to a gamma radiation source Locating gamma radiation sources When the gamma radiation source is detected by the PM1703M or a stationary system the gamma radiation source is to be located To locate the gamma radiation source the instrument should be held at a distance no more than 10 cm from the scanned object The velocity of movement along the scanned object should not be more than 10 cm per second As the PM1703M moves closer to a gamma radiation source the rate at which the audio tone or pulsation repeat will increase When the maximum rate is achieved a continuous audio alarm sounds but the rate of pulsation if the vibration alarm device is turned ON will not change In this case further locating of gamma radiation source is not possible without background updating Press the MODE button trying to keep a distance
18. ing temperatures may differ from the stated above THI P 412114 004 01 S OPERATING INSTRUCTIONS TO THE USER 5 1 The unit operation check up Turn the PM1703M ON by pressing and realizing the MODE button If the PM1703M is operative and the battery voltage is normal the unit will go through a series of self tests with all segments signs and indicators displayed on the LCD Then the LCD will display test and the analog scale with a number of segments decreasing in time After the self tests are completed the alarm will be activated and the unit will go into the background updating mode The LCD will display CAL and the analog scale with a number of segments increasing in time After the analysis of the gamma radiation background has been completed the LCD will display for one second a value of the count rate and the unit will go into the search mode The PM1703M is ready for operation If the battery voltage drops below 1 1 V the LCD will indicate the battery discharge warning sign The battery needs to be replaced see section Maintenance S 2 Searching for gamma radiation sources Refer to you site regulations and Operating Procedures prior to search operation The following may serve as a general guide The PM1703M is intended firstly for efficient searching detection and location of gamma radiation sources It is not energy compensated and so it has a high sensitivity at low energies 60 300 keV see Appendix
19. midity 60 20 30 Gamma radiation background no more than 20 uSv h In process of evaluation your site regulations for work with radioactive materials and other radiation sources as well as the Standards of radiation safety should be followed The dosimetric verification unit with the source of Cs is to be used for checking The equipment should be verified and the source should be certified 8 1 The checking up of the dose rate range and accuracy of dose rate measurements Place the instrument into the dosimetric verification unit so that the instrument side with the audio alarm device is directed to a source and the conventional true value of the dose rate at the geometrical center of the detector 0 8uSv h but do not irradiate the instrument Turn the instrument ON turn the audio and vibration alarm devices OFF section 6 1 Press and release the MODE button to switch to the dose rate mode When the value of a variation coefficient becomes less than 5 read the three background values 5 10 seconds Calculate the average background value Hy 3 Irradiate the instrument When the value of a variation coefficient becomes less than 5 read the three dose rate values in 5 10 seconds and calculate the average dose rate value Hay Calculate the relative error of indication I H4 100 25 THI P 412114 004 01 Repeat the above procedures for the conv
20. ne 375 17 263 72 Fax 375 17 217 70 81 Tel Fax 375 17 263 81 88 E mail polimaster polimaster com plant polimaster com Address 112 M Bogdanovich str 51Staroborisovsky Minsk Minsk 220040 Republic of Belarus 220141 Republic of Belarus Date of sale Seller signature Seller stamp The warranty after warranty repair is made ec gt gt The warranty period is prolonged till ec 73 Manufacturer s officer signature Manufacturer s stamp 32 Sensitivity cps uSv h 700 600 500 400 300 200 100 THI P 412114 004 01 ATTACHMENT Energy response of the PM1703M 100 1000 E keV Typical energy response of the PM1703M 10000 33
21. og scale with a number of segments increasing The user may update the background value whenever it is necessary Press and fix the MODE button for approx 2 3 seconds The LCD will display CAL and the background updating will restart TUT P 412114 004 01 e When the background accumulation and necessary calculations including threshold are completed the PM1703M will automatically go into the search mode In this mode the instrument automatically compares the current pulse count to the threshold and alarms when the threshold value is exceeded In the search mode the LCD displays the current average count rate in counts per second e While the PM1703M is in this mode the user may search detect and locate the radioactive sources To evaluate the intensity of a radiation source or background press and release the MODE button and the instrument goes to the dose rate mode The LCD will display dose rate in uS h The unit may be switched between the search and dose rate modes at any time by pressing and releasing the MODE button The PM1703M goes into the set mode by pressing and fixing the MODE button for more than 4 seconds While in the set mode the user may check the preset value of the coefficient n or set the new value and may also check the current status ON or OFF of the audio and vibration alarm devices or to change it The set and or dose rate modes may be disabled using an application program installed in your pers
22. on The LCD will display CAL and the background accumulation will restart Search mode In the search mode the processor will count pulses coming from the detector block in 0 25 s periods and store in memory a sum of pulses for the count time A number of pulses for the last recent period is added to the sum every 0 25 s and the oldest count is discarded Therefore a number of pulses N stored in the processor memory is updated every 0 25 s The current value of N is compared to the alarm threshold P every 0 25 s If the current value of the pulse count exceeds the threshold value i e N gt P then the audio and or vibration alarm will be produced and the LCD will display the radiation danger sign The rate at which audio tone repeats will increase when an excess of over P becomes more important i e when the ratemeter comes closer to a gamma radiation source When the audio alarm device is turned ON the audible signals are produced When the vibration alarm device is turned ON the mechanical vibration is produced the device case vibrates In the search mode the LCD will indicate the current average count rate in counts per second Dose rate mode While in the dose rate mode the PM1703M indicates the dose equivalent rate DER of photon radiation H 10 at Cs in collimated radiation The LCD will display the dose rate value DR in p Sv h which is calculated according to formula 23 TUT P 412114 004 01 DR
23. onal computer e The PM1703M may be switched to the PC communication mode by pressing the LIGHT button see section 2 3 While in this mode it is possible to make the necessary configuration of your PM1703M and to transfer the history of the unit operation stored in its non volatile memory to PC For more details please refer to the section Additional operating instructions to the advanced user The PM1703M is equipped with an automatic low battery detection circuit If the voltage drops below 1 1 V the battery discharge warning sign will be displayed in the LCD lower left corner In this case the battery needs to be replaced see section Battery replacement The detector block operation is also checked If the count rate is higher than the factory preset high limit the LCD will display OL OverLoad To turn the instrument ON press the MODE button To turn the unit OFF press the LIGHT button While the backlight is ON press and fix the MODE button until the LCD displays OFF THI P 412114 004 01 11 1 MODE button 7 RADIATION symbol 2 LIGHT button 8 variation coefficient 96 3 window of IR transceiver 9 unit of measurement 4 liquid crystal display LCD 10 lid of battery compartment 5 analog scale 11 battery 6 battery discharge warning symbol 12 outlet of audio alarm device Fig 1 The alarming ratemeter PM 1703M General view THI P 412114 004 01 4 SPECI
24. s However other settings may be changed using an application program only see section Communication with PC To change a coefficient n value enter the set mode by pressing the MODE button and fixing it for more than 4 seconds The LCD will display CAL and then the preset value of the coefficient n To activate changing the coefficient n value press and release the LIGHT button for 3 more seconds The preset coefficient n value will flashing indicating that this value may be changed If the button 2 is not pressed for 3 seconds the unit will automatically go into the background updating mode LCD will display CAL While digits are flashing a repeated pressing the MODE button will decrease the value of the coefficient n by 0 1 and a repeated pressing the LIGHT button will increase it by 0 1 Hold the buttons down to change the numbers rapidly The unit will automatically go to the background updating mode in 6 seconds after the last pressing of any button To change the current status ON OFF of either audio or vibration alarm device enter the set mode by pressing the MODE button and fixing it for more than 4 seconds The LCD will display CAL and then the preset value of the coefficient n Press and release the MODE button again The LCD will display 1 on The figure 1 indicates the audio alarm device and shows that the audio alarm device is ON Press the LIGHT button to change the status of the audio alarm device
25. tes in the relative units the time since the beginning of the background updating mode shown in increasing a number of indicated segments The scale completely filled with segments indicates that the background updating is completed Later on when the operator makes the unit to update the background the background count time will automatically decrease with increasing the background level The processor calculates the average count rate N during the background count time and the threshold value P P N T tn o 1 with 2 where count time in the search mode o meansquare deviation of the value calculated using the equation 2 22 412114 004 01 for Poisson distribution of pulses n number of meansquare deviations coefficient n The coefficient n changes the threshold value according to equation 1 It is obvious that the ower is the coefficient n the ower 1s the threshold value the higher is the unit sensitivity in the search mode However in this case a probability of false alarms will increase When the background accumulation is completed the unit will display for several seconds the average count rate in counts per second during the background accumulation calculate and store in memory the value of quantities which are necessary for further operations and will automatically go into the search mode To update the background value press and fix for more than 2 s the MODE butt
26. trument the PM1703M should not be subjected to severe mechanical shock e Clean the PM1703M with a soft lightly wetted cloth Do not use benzene or any other strong chemicals e In searching for radiation sources your site regulations for work with radioactive materials and other radiation sources as well as the Standards of radiation safety should be followed Some changes may be introduced in the instrument electrical scheme construction design and software that do not influence the specifications and therefore may be not specified in this manual THI P 412114 004 01 3 GENERAL DESCRIPTION 3 1 Introduction The PM1703M is an easy to use instrument with two buttons only To operate with PM1703M the user does not need to be an expert in nuclear physics or radiation protection After been switched ON the instrument woks automatically and alarms when finds a radiation source gamma emitting isotopes However to make proper settings of the instrument parameters to transmit data from the instrument memory to PC and especially to interpret the data obtained the user should have some knowledge of radiation and a procedure of searching for radioactive sources Accordingly the present manuals has two sections Operating instructions to the user and Additional operating instructions to the advanced user 3 2 Delivery kit Standard kit Item Type Quantity Alarming ratemeter PM 1703 M 412114 004 Batter
27. ual for the program PM 1703 M interface describes how to run the application program Using this application program it is possible to register the unit to the specific user to store the time when the unit was received and returned to read the information from the unit memory including the history of its operation number of the unit time of its turning ON OFF current values of the count rate in the data storage intervals preset by the user value of the coefficient n count time in the search mode and in the background updating mode time and readings of the unit when the threshold was exceeded 17 412114 004 01 to enter password to open a menu of parameters to set the operation parameters of the instrument e to check and correct if necessary the current time and date e to turn ON or OFF the audio and or vibration alarm device e to set the data storage intervals in which the current count rate value is stored in the non volatile memory of the unit e to check the present or to set the new values of the count time e to enable disable the set mode operation using the buttons e to enable disable the dose rate mode 18 TUT P 412114 004 01 7 DESIGN AND THEORY OF OPERATION The block diagram of the PM1703M is shown in Fig 3 The instrument consists of detector block processing block audio alarm device vibration alarm device The detector block consists of
28. y PANASONIC POWER LINE AA LR6 or similar Operating manual 412114 004 Package for shipping 305641 031 Options available on order IR adapter 426434 010 including CD with software and package Carrying Case 735231 027 412114 004 01 3 3 Overview of control buttons and display BUTTONS The PM1703M has two control buttons that are located at the top panel of the instrument Fig 1 These buttons perform different functions depending on the mode used In general the button main functions are 1 MODE button is used to turn the unit ON to select the operation mode background updating mode dose rate mode set mode 2 LIGHT button is used to turn the LCD backlight ON to initiate IR communication with PC In the set mode the button functions are 1 MODE button is used to select a set parameter coefficient n or turning ON OFF the audio and or vibration alarm devices to decrease the coefficient n value in steps of 0 1 2 LIGHT button is used to activate changing the coefficient n to increase the coefficient n value in steps of 0 1 to change the audio and vibration alarm devices ON or OFF DISPLAY 4 the liquid crystal display LCD indicates count rate value dose rate value coefficient n value messages test CAL OL ON OFF 5 the analog scale of 19 segments indicates TUT P 412114 004 01 time left until self
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