PM1703MO-1A PM1703MO-1B PERSONAL COMBINED RADIATION DETECTOR/DOSIMETER. Operation Manual

Transcription

1 PM1703MO-1 PM1703MO-1A PM1703MO-1B PERSONAL COMBINED RADIATION DETECTOR/DOSIMETER Operation Manual

2 TABLE OF CONTENTS 1 DESCRIPTION AND OPERATION Application Delivery kit Specifications Description Design Battery Battery charger OPERATION Pre-operation General Safety precautions Battery installation Functional check Operation Turning the instrument ON/OFF Low battery indication Operation modes Search mode. Detection and location of gamma sources DER measurement mode DE measurement mode Setup Communication with computer Alarm thresholds Dose rate alarm thresholds Dose alarm threshold Permanent memory of the instrument MAINTENANCE TROUBLESHOOTING CALIBRATION TEST PROCEDURE (REFERENCE) STORAGE AND SHIPPING WARRANTY ANNEX A - Typical energy response of the instrument in search mode ANNEX B - Typical instrument anisotropy

3 Thank you for purchasing a Polimaster Personal Combined Radiation Detector/Dosimeter. Before operating this unit, please review this manual thoroughly and use the instrument for its intended application. When in use, don't keep the instrument in immediate proximity to radio emitting sources, such as cell phones, to avoid false alarms. Avoid mechanical shocks and damages, corrosive media, organic solvents, open fire, submerging the instrument into water and other unfavorable effects. Observe the radioactive materials handling and radiation safety standards and regulations in case of detection of radiation sources/emissions. 3

4 1 DESCRIPTION AND OPERATION 1.1 Application 1) Personal Combined Radiation Detector/Dosimeter PM1703MO-1 PM1703MO-1A PM1703MO-1B (hereinafter referred to as the instrument ) is designed to measure ambient dose equivalent rate (DER) * (10) of gamma and X-ray (photon) radiation, ambient dose equivalent (DE) Н * (10), to search for (detect and locate) radioactive materials and alerting the user with audible, visual and vibration alarms. The instrument is available in three versions: - PM1703MO-1 - PM1703MO-1A differs from the PM1703MO-1 by additional USB interface for communication with a personal computer (PC) - PM1703MO-1B differs from the PM1703MO-1 by additional Bluetooth radio channel for communication with a Pocket PC (PPC) or PC. The instrument is intended for use by customs and border guards, personnel of nuclear power plants, isotope laboratories, first responders, firefighters, military, police, etc. All operations history is stored in the instrument s permanent memory, protecting the data even when the battery is removed. The stored data can be transferred to a personal computer via infrared interface (all models), Bluetooth (РМ1703МО-1B) and USB interface (РМ1703МО-1A). 1 Some changes may be introduced in the instrument electrical circuit, design and software that do not influence the specifications and, therefore, may be not specified in this manual. 4

5 1.2 Delivery Kit The instrument s delivery kit is shown in Table 1. Table 1 Description Quantity, pcs. PM1703MO-1 PM1703MO-1A PM1703MO-1B PM1703MO-1 Personal Combined Radiation Detector/Dosimeter PM1703MO-1A Personal Combined Radiation Detector/Dosimeter PM1703MO-1B Personal Combined Radiation Detector/Dosimeter Battery (Alkaline) 1.5 V, min ma/h, AA (LR6) 1) Cable USB Operation manual Package Accessories: - software 1 CD 2 CD 2 CD - flash Card with software for Pocket PC charger 2) holster 2) infra red adapter 2) ) or rechargeable battery Ni-MH (Nickel Metal Hydride) 1.2 V, not less than 2000 ma/h, AA (R6) on customer request. Other batteries with similar parameters are allowed 2) optional items 5

6 1.3 Specifications Detector DER indication range DER measurement range Maximum permissible intrinsic relative error of DER measurement in measurement range CsI (Tl) scintillator Geiger-Muller tube 0.01 µsv/h Sv/h 0.1 µsv/h Sv/h ( 20 K 1 H K2 H ) %, where - DER value, msv/h K 1 coefficient msv/h K 2 coefficient (msv/h) µsv Sv 0.1 µsv Sv DE indication range DE measurement range Maximum permissible intrinsic relative error of DE measurement in measurement range 20 % Sensitivity in search mode, not less: - PM1703MO cps/(µsv/h) for 241 Am 85 cps/(µsv/h) for 137 Сs - PM1703MO-1A, PM1703MO-1B 200 cps/(µsv/h) for 241 Am 100 cps/(µsv/h) for 137 Сs Energy range in DER measurement mode Energy response in DER measurement mode relative to MeV ( 137 Cs) Energy range in Search mode (Typical energy response in search mode is shown in Annex A) Typical instrument anisotropy MeV 30 % MeV see Annex B Response (time to alarm) when the radiation intensity at the instrument s reference point is increased by 0.5 μsv/h in a period of not more than 0.5 seconds using 241 Am, 137 Сs, 60 Сo gamma sources (at n-coefficient set to a value corresponding to mean time to false alarm > 10 hours and ambient background level of not more than 0.25 µsv/h), not more than 2 s Response (time to alarm) when the radiation intensity at the instrument s reference point is increased gradually by 0.5 μsv/h using a 137 Сs gamma source at a speed of not more than 0.5 m/s (at n-coefficient set to a value corresponding to mean time to false alarm > 10 hours and ambient background level of not more than 0.25 µsv/h), not more than 2 s Response time (display indication of new dose rate with a relative error of ±20 %) following an increase in radiation field by 1 µsv/h in a period of not more than 0.5 seconds produced by a 137 Cs source, not more than 4 s Detection of gamma radiation sources with 0.95 probability at the n-coefficient set to a value corresponding to mean time to false alarm > 10 hour and ambient background level of not more than 0.1 µsv/h according to Table 2 6

7 PM1703MO-1A, PM1703MO-1B: Detection of gamma radiation sources with 0.95 probability at the n-coefficient set to a value corresponding to mean time to false alarm > 1 hour and ambient background level of not more than 0.25 µsv/h according to Table 3 Rate of false alarms in search mode: - at n-coefficient = at n-coefficient = 5.3 Background calibration Type of alarm Communication with PC (reading data from storage, setting parameters) - all models - additional reading of data from storage, identification of isotopes with PC or PPC: PM1703MO-1A PM1703MO-1B Power requirements Battery life (at average ambient background 0.3 µsv/h, LCD backlight, audible and vibration alarms 5 min/24 hours) Battery life at continuous communication with PC via mean time to false alarm > 1 h mean time to false alarm > 10 h - automatic upon power on - auto calibration after background variations and change of n-coefficient - user initiated as needed by pressing a button - audible - vibration - light infra red USB interface Bluetooth radio channel AA (LR6) battery (Alkaline) 1.5 V, min ma/h or rechargeable battery AA (R6) (Ni-MH (Nickel Metal Hydride)) 1,5 V, min ma/h 1000 h Bluetooth (PM1703MO-1B) Data collection Environmental: - temperature range 28 h 2000 data points -30 to +50 С (LCD indication from -20 to +50 С) up to 98 % at 35 C 84 to kpa IP65 - relative humidity - pressure Ingress protection Drop test 0.7 m onto concrete Dimensions: PM1703MO-1 72 x 32 x 87 mm (2 13/16 " x 1 ¼" x 3 7/16 ") PM1703MO-1A PM1703MO-1B 75 x 35 x 98 mm (2 15/16 " x 1 3/8 " x 3 7/8 ") Weight, including battery, max.: 250 g 7

8 Table 2 Parameter 241 Am Source 137 Cs Activity of gamma source, MBq 30 % Average velocity (source/instrument), m/s Source-to-detector surface distance, m Table 3 Parameter 133 Ba Source 137 Cs Activity of gamma source, kbq (µci) 55.0 (1.5) (2.7) 50.0 (1.35) Velocity (source/instrument), m/s Source-to-detector surface distance, m Co 60 Co 8

9 1.4 Description Design The body of the instrument is made of a shockproof plastic protected against water jets and dust. The instrument, its functional parts, detectors, their effective centers and direction of calibration are shown in Figure 1. The LCD screen may display any of the following information: - Dose Equivalent Rate (DER); - Dose Equivalent (DЕ); - n-coefficient, which determines the alarm threshold in the Search mode (also called alarm multiplier ); - messages: "tst" testing, "P Х,Х"- firmware version, "CAL" - calibration, "OL" overload, "off" the instrument is off, "bat" battery status, "to" temperature overload, etc. - audible alarm sign (if audible alarm is enabled) - vibration alarm sign (if vibration alarm is enabled) - Bluetooth sign (if Bluetooth is enabled) - blinking h (history) symbol (in the Search and DER measurement modes) - indicates that there has been DER alarm activation and information about it hasn t been uploaded to a computer - blinking R (respond) symbol indicates that the Search mode is currently on - - indicates critical low battery. An analogue bar in the lower area of the LCD display indicates the time left until self-tests or background calibration are completed. In the Search mode, DER measurement mode and DE measurement mode the analogue scale segments represent the dynamics of radiation environment change. The instrument is provided with a detachable clip (item 9, Figure 1) allowing the user to affix the instrument to a waist belt for hand-free operation. The clip can be removed as shown in Figure 2 a). Draw aside the spring from the latch using a screwdriver and carefully move the clip towards the face panel. Install the clip as shown in Figure 2 b). Put the clip on the bracket and move until it latches. The instrument can come complete with an optional protective holster made of synthetic material which also can be worn on a belt. It s recommended to remove the clip while using the holster. 9

10 1 MODE button - used for switching the instrument ON; switching between operation modes; background update (calibration); changing parameters in Setup mode. 2 - LIGHT button used for switching on the backlight; switching on the indication of the battery power level; enabling communication with a PC; changing parameters in Setup mode, switching the instrument OFF. 3 - infra red (IR) window 4 - red light-emitting-diode (LED) alarm 5 liquid crystal display (LCD) 6 audible alarm 7 battery 8 battery compartment lid 9 clip 10 USB connector closed with a plastic plug and marked. Figure 1 10

11 a) b) Figure 2 11

12 1.4.2 Battery The instrument is powered by an Alkaline battery, 1.5 V min 2000 ma/h, AA (LR6) size supplied with the instrument. It is allowed to use a rechargeable battery NiMH (Nickel Metal Hydride), 1.2 V min 2000 ma/h, AA (R6) size Battery Charger The battery charger is available as an option. WARNING! USE THE BATTERY CHARGER ONLY WHEN RECHARGEABLE BATTERY RECOMMENDED BY THE MANUFACTURER IS INSTALLED. ATTEMPTING TO CHARGE NON-RECHARGEABLE BATTERIES MAY CAUSE DAMAGE TO THE INSTRUMENT! The battery charger is combined with the instrument holder and is designed for charging the battery installed in the instrument. Install the charger on the dash panel of an automobile or any other horizontal surface. There are four 3.5-mm dia. holes to fix the charger. To protect the instrument from sun thermal effect, the charger can be equipped with an optional protective screen. Place the instrument in the holder and fix with its clip as described below (see Figure 3). Depending on the battery charger version, it may be connected to a standard automobile cigarette lighter socket 12 V or domestic supply network: Figure 3 - install the holder on the automobile s dash panel (or other surface) and fasten it with four screws (not included in the delivery package) - Move the instrument clip down by pressing on it - Install the instrument to the holder and release the clip, ensure that the clip claw is firmly fixed in the holder - If the power is available and the charger is properly connected to the vehicle power supply or domestic supply network, the green LED will be activated on the charger s back side - If the instrument is properly installed in the holder, the battery sign will be activated on the LCD until the battery completely charges. 12

13 2 OPERATION CAUTION! WHEN THE INSTRUMENT OPERATES AT TEMPERATURES BELOW minus 20 o C, THE LCD IS NOT FAIL-PROOF. RELY ONLY ON THE AUDIBLE OR VIBRATION ALARM WHEN DETECTING RADIATION SOURCES. THE LCD RESUMES ITS NORMAL OPERATION WHEN TEMPERATURE CONDITIONS ARE ABOVE -20 o C. When the temperature inside the instrument exceeds the upper limit, the message to will be displayed. The instrument functionality will be restored after it cools down. In this case it is recommended to re-calibrate instrument. 2.1 Pre-Operation General Check the instrument s delivery kit according to paragraph 1.2 and its functionality according to paragraph Remove the instrument from its package Before operating the instrument, review this operation manual thoroughly and retain it for the future references Safety Precautions The instrument is a safe product provided it is used for its intended application and according to the operating manual. The instrument is powered by a 1.5 V battery. There are no live parts with dangerous voltage and current accessible under normal operation. RF electromagnetic fields, electrostatic fields, equivalent and maximum level of sound and level of local vibration comply with safety requirements. Observe the radioactive materials handling and radiation safety standards and regulations during adjustment, repair, maintenance and calibration of the instrument, if radioactive sources are used or detected Battery Installation The instrument is packaged without a battery installed. To install the battery, unscrew cover 8 of the battery compartment (as shown in Figure 1) unit with a coin or screwdriver. Once opened, insert a single AA battery loading the positive (+) end first. Reinstall the cover and tighten it. Once the battery has been installed, the instrument will turn on automatically Functional Check The instrument must correctly go through the self-tests, background calibration and enter the operation mode (2.1.1) and other modes (2.2.3). 2.2 Operation Turning the Instrument ON/OFF Once the battery has been installed, the instrument will turn ON automatically. To turn the instrument ON in the process of operation (if it was turned off by control buttons) it is necessary to press the Mode button. All display segments and alarms (audible, LED and vibration) will be activated for approximately 1 second and the instrument will 13

14 than perform its self-test procedures. The display will indicate for few seconds the firmware version (for example, Р-1.7):, then bat message, flashing icon and the analogue scale, which represents remaining battery power:, then tst message and the analogue with decreasing segments which countdown the test time:. After self-tests are completed the instrument goes into the background calibration mode, in which LCD indicates CAL and the analog scale is being filled up:. During calibration the instrument measures radiation background and calculates the detection alarm threshold using the n-coefficient values (see ). When the background calibration is finished, the instrument goes into the Dose rate measurement mode and is ready for operation. When the instrument is turned ON, it continuously monitors radiation environment, measures DER and DE. To turn the instrument OFF, press and hold the LIGHT button for 6-7 seconds until the LCD screen displays the flashing OFF message. Confirm switching instrument off by pressing the MODE button. The instrument is switched off if the LCD displays OFF message Low Battery Indication The instrument automatically monitors the battery voltage. When the battery voltage drops below critical value (approx V), the instrument LCD will indicate a blinking battery sign and signals will be produced (audible, light and/or vibration). This means that non-rechargeable battery must be replaced (or rechargeable battery must be charged). The instrument will work up to 8 hours after the appearance of the critical low battery warning (at a normal background radiation level). By pressing the MODE button the user can switch off the critical low battery warning for about 30 minutes. At the same time the alarm thresholds will remain turned on. To check the battery power level in any operation mode, press and hold the LIGHT button, the bat message and the remaining battery power in relative units on the analogue scale will be displayed. The instrument automatically detects battery type. If non-rechargeable battery is detected, the bat message will blink; if rechargeable battery is detected, the bat message will be still. 14

15 N O T E - USED NON-RECHARGEABLE BATTERY WITH VOLTAGE LOWER THAN NOMINAL MAY NOT BE RECOGNIZED CORRECTLY. THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY MALFUNCTIONS CAUSED BY INCORRECT BATTERY USE Operation Modes - Self-tests - Background calibration - Search mode - Dose rate (DER) measurement mode - Dose (DE) measurement mode - Setup - Communication with computer Use the MODE button to switch between the main modes: Search DER DE Bluetooth (on/off) Search mode. Detection and Location of Gamma Radiation Sources In the Search mode the instrument displays the current DER value in Sv/h, msv/h, Sv/h and an R (Respond) symbol is blinking which indicates that the Search mode is on. The scale and the units of measurement are changed automatically. In the Search mode the instrument detects and locates sources of photon radiation in the DER range from 0.01 Sv/h to 0.1 msv/h (for 137 Cs). If the value of the dose rate exceeds the upper limit of this range, the LCD screen will display the overload message -OL-. In this case the user should switch to the DER mode to retain control over the radiation environment. ATTENTION! AFTER THE INSTRUMENT IS EXPOSED TO A DOSE RATE HIGHER THAN 0.1 SV/H, IT MAY PRODUCE ALARMS ( CHIRPS ) FOR SOME TIME EVEN AFTER THE RADIATION BACKGROUND RETURNS TO THE NORMAL CONDITION. THE DURATION DEPENDS ON THE RATE AND LENGTH OF THE EXPOSURE AND ATTRIBUTED TO PHYSICAL PROCESSES IN THE CSI DETECTOR AFTER THE EXPOSURE. The instrument automatically compares the average count rate from the detector with the alarm threshold value (the value calculated based on the background radiation measured during calibration and the n-coefficient set by the user). If the threshold value is exceeded, the instrument triggers an alarm. The n-coefficient changes the search alarm threshold (minimum detection level): the smaller is the value of n-coefficient, the smaller is the threshold value and the more sensitive is the instrument to changes in background radiation. However, this also increases the probability of false alarms (false positives). The n-coefficient is set by the user in the Setup mode if this function is enabled in the PC communication mode (the manufacturer preset n-coefficient value is 5.3). The value of n-coefficient can be set in the range of 1.0 to 9.9 through every

16 To update the background radiation levels, press and hold down the Mode button for more than 2 seconds until the message CAL appears in the display. The instrument is able to perform background update (calibration) automatically. This feature provides more convenient instrument usage and decreases the probability of false alarms when the radiation background is changed slowly and there are no alarm signals. The auto-calibration function can be enabled/disabled in the PC communication mode. The instrument is highly sensitive to radiation level variations. It can give alarm signals if, for example, it is moved from the outside (street where the radiation background is normally lower than in a room) to a building where there are materials including natural radioactive isotopes (K, Th, Ra, U), which produce a higher natural radiation background. These materials mostly include: concrete and similar materials containing sand, natural stone (especially granite), ceramic tile, glass, etc. In case the alarm is actuated, automatic calibration is not performed, therefore it is recommended that the user re-calibrate the instrument manually to accommodate the new background. You can also change the n-coefficient to alter the sensitivity threshold. When the background radiation decreases (when the instrument is moved from a higher level of background radiation to a lower one) the instrument will be re-calibrated automatically (if auto-calibration is enabled). This increases the instrument s sensitivity and is very useful. Detection of gamma radiation sources When searching for radiation sources hold the instrument with its side without clip directed towards the scanned object. For greater efficiency, scan the object (baggage, people, container, vehicle, etc.) closely and slowly. Use the light or vibration alarm when audible alarms are hard to hear or may not be advisable due to security considerations. Bear in mind that sensitivity of the instrument and false alarm rate are dependent on: - preset n-coefficient, and - background level during calibration used by the instrument to calculate the search alarm threshold. Auto-calibration function of the instrument automatically adjusts/calibrates to slow changes in the ambient radiation level and update background approximately every ten minutes with a decreasing ambient background level or in slightly longer periods of time with an increasing ambient background level. However, the instrument will automatically recalibrate itself only if there are no alarms or abrupt background changes over the algorithm-defined periods of time. False alarms Occasionally, the instrument may produce random signals, called false alarms. The number of false alarms depends on many factors including changes in the ambient background radiation level as well as changes to the system setup. Mean time to false alarm under normal conditions, if there are no mechanical impacts, is specified in technical specifications. Such alarms (light, audible and/or vibration) are irregular and can, therefore, be easily distinguished from true alarm signals produced by the gamma radiation sources which tend to have continuous repetition rate or increase as the instrument moves closer to a radiation source. Location of gamma radiation sources As the instrument moves closer to a radiation source, the frequency alarm signals increases, thus enabling the user to determine the direction toward the source location. 16

17 When the light, audible and/or vibration alarm signal frequency reaches the maximum value, pinpointing the source more closely is impossible without updating the background. During the background calibration it is important to keep the instrument in the same place if possible. Once the background calibration is completed, the user may then continue to search for the radiation source. This procedure may be repeated as many times as necessary until the gamma radiation source is located DER Measurement Mode In this mode the instrument LCD displays the current dose rate value in Sv/h, msv/h, Sv/h. The scale and units of measurement are changed automatically. The dose rate indication range is from 0.01 Sv/h to 9.99 Sv/h. If the value of the dose rate exceeds the instrument s upper limit (9.99 Sv/h), the LCD screen will display the overload message OL DE Measurement Mode In this mode the instrument LCD displays the value of the accumulated dose in Sv, msv, Sv. The scale and units of measurement are changed automatically. The dose indication range is from 0 Sv to 9.99 Sv. At the same time the analogue scale is filled. The number of displayed scale segments corresponds to the accumulated dose relative to the preset dose threshold level. If the value of the accumulated dose exceeds the instrument s upper limit (9.99 Sv), the LCD screen will display the overload message OL. To reset the accumulated dose value and start a new accumulation it is necessary to connect the instrument to a PC and use the Software or the control buttons, if this function is enabled in PC communication mode (see ). To reset the accumulated dose, press and hold down the Mode button until the message appears in the display. The dose indication mode is displayed on the LCD screen for 6-8 seconds, after that the instrument automatically switches to the Search mode Setup The instrument is supplied with the settings as shown in Table 4. Table 4 Factory (default) settings * ON /OFF Search mode (display is µsv/h) DER measurement mode (display in µsv/h, msv/h, Sv/h) DE measurement mode (display in µsv, msv, Sv) Auto calibration Possibility to change the n-coefficient by control buttons 17

18 Possibility to enable/disable alarm types by control buttons Audible alarm Vibration alarm LED (light) alarm DER data logging interval 60 minutes n-coefficient 5.3 * - The factory settings can be changed before shipment on customer request Using the instrument front panel buttons it is possible to adjust (change) several parameters of the instrument: - n-coefficient (setup range 1.0 to 9.9 with increment of 0.1) - enable or disable the Audible alarm on reaching the alarm threshold - enable or disable the Vibration alarm on reaching the alarm threshold. To enter the Setup Menu from the DER measurement mode or the Search mode, press and hold down the Mode button for more than 5 seconds. The CAL message will be displayed first. Continue to hold the Mode button down until the screen displays the value of n-coefficient:. Press the Mode button to go to parameters in the following succession: n-coefficient audible on/off vibration on/off temperature inside ( о C). Setting the n-coefficient To set (or change) the n-coefficient value press and hold down the Mode button for more than 5 seconds. The CAL message will be displayed first, then the n-coefficient value. To enter the n- coefficient adjustment menu press the Light button, the figures will start blinking. Then press the Mode button to increase the coefficient value, or the Light button to decrease it: 18

19 Six seconds after the last adjustment of the n-coefficient value the instrument automatically performs calibration to calculate the new alarm threshold based on the new n-coefficient. Enabling/disabling the audible and vibration alarms To adjust it, make sure the instrument is in any of the operation modes, then press the Mode button and hold it for more than 5 seconds. CAL message will be displayed first, then the value of the n- coefficient. Press the Mode button once again to enter the audible alarm adjustment menu: the On (or Off) message and a blinking loudspeaker sign : To change the setting press the Light button, i.e. switch on or off the audible alarm. To enter the vibration alarm adjustment menu press the Mode button once again. The LCD will display the On (or Off) message and a blinking vibration sign. Use the Light button to switch on or off the vibration alarm. Then press the Mode button and LCD will display the temperature inside the instrument. ATTENTION! DON T USE THE BUILT-IN TEMPERATURE FOR ENVIRONMENTAL TEMPERATURE MEASUREMENTS. In the Setup mode if you don t press the Mode button within six seconds the instrument automatically goes to the CAL calibration mode Communication with Computer ATTENTION! THIS IS ADVANCED MODE FOR ADMINISTRATOR USERS WITH PASSWORD-PROTECTED ACCESS. The manufacturer preset password: 1. The instrument has an internal clock which is responsible for keeping track of date and time. If the battery is removed or allowed to go dead, the clock will no longer function. To verify the clock, the instrument can be synchronized with PC using the PM1703MO1 Data Processing Software. The following instructions will walk through setting of the clock: To synchronize the time between the instrument and PC, simply connect the instrument to the PC via IrDA. Start the Polimaster software for the instrument. Read the history of the instrument and the time will automatically be synchronized after reading the history or reading the settings. After that the event history will be saved with time and data stamps referred to local PC time. If it is impossible to sync time after a battery replacement, for example there is no access to the PC, change the battery and resume 19

20 operation without issue. However the internal clock will be lagging behind approximately the duration of time there is no battery power to the instrument. The instrument performs data exchange with a PC with OS WINDOWS via infra red communication at a distance up to 0.2 meters. The PM1703МO-1A has additional communication with PC via USB interface, and the PM1703МO-1B via Bluetooth radio channel. The following functions can be performed in the mode of communication with PC: - downloading information from the instrument s memory: instrument ID, date and time the instrument is switched on and off; - date and time of each self-testing and self-test report; - dose rate values in preset data logging intervals; - date, time and value of dose rate alarms; - date, time and value of dose; - date, time and dose rate value of each background calibration; - enabling/disabling audible and/or vibration alarm; - checking or changing the n-coefficient value (in the range from 1 to 9.9 in 0.1 steps); - checking and automatic correction of current time and date; - setting the logging intervals in which dose rate values are stored in instrument s memory; - enabling/disabling the control buttons to switch on/off audible and vibration alarm; - setting dose rate alarm threshold levels; - setting dose alarm threshold levels; - resetting accumulated dose; - enabling/disabling the control buttons to resetting accumulated dose; - switching the instrument off Communication with computer via infra red and PM1703MO-1A via USB interface For infra red communication use a personal computer with IrDA or infra red adapter, for communication via USB interface use a PC with USB port and USB cable supplied with the instrument and the user software supplied on CD. Minimum requirements to a computer and its software: - Intel Pentium or similar processor Mb RAM - Windows 2000, NT, XP, Vista (small font in Windows settings) - 20 Mb free on HDD and an adequate space for the database - 800x600 resolution of a monitor - IrDA - database compatible with Microsoft Office Access. Install the Software supplied on CD on your personal computer in order to be able to communicate with the instrument. Run a program. For more information about the user software please see the text document installed together with the user software. In communication via USB interface the instruments PM1703MO-1A allow to transfer the acquired scintillation spectra for radionuclide identification to PC. For this purpose it is included in a delivery kit of PM1703MO-1A a special PoliIdentify Software Laptop/Desktop Edition on a separate CD. The detailed information on the software installing and its operation is described in the text document that is installed with the programm. 20

21 To initialize the infra red communication, place the instrument cm away from the infrared adapter (IrDA) and press the Light button. The instrument will enter the data exchange mode the message Ir will appear on the LCD screen: For communication with computer via USB interface connect the instrument with the computer using a USB cable. N o t e - As soon as the instrument s operation history is transferred to computer, the instrument is turned off automatically (the LCD displays OFF ) Communication via Bluetooth (PM1703MO-1B) The instrument can perform Bluetooth wireless communication with a PC with built-in or external compatible Bluetooth and transfer history of operation and parameters stored in its permanent memory, as well as the acquired scintillation spectra for radionuclide identification. The user software for operation of the instrument via Bluetooth and its description are included in the delivery kit: - for PC on CD; - for PPC on memory card. Press the Mode button in the Dose measurement mode to enter the Bluetooth communication on/off menu. The LCD will display a blinking sign and message OFF, i.e. Bluetooth is off. Press the Light button to switch on (off) the Bluetooth. When Bluetooth is on, the LCD displays message on. The instrument starts searching (blinking sign Bluetooth is on) and automatically establishes communication with an available pocket PC. On request PIN N o t e - The PM1703MO-1B with activated Bluetooth may occasionally automatically restart if low battery is used. This is caused by increased power consumption by Bluetooth. The battery should be replaced. It is also recommended to replace the battery if the instrument is expected to be used for a long time with activated Bluetooth, audible and vibration alarms in places where the dose rate exceeds the natural radiation background Alarm Thresholds The instrument can produce warning signals when the following thresholds are exceeded: - Dose rate (two threshold levels); - Dose (one threshold level). When a preset threshold level is reached, the instrument immediately produces a warning signal, notifying the user about a dangerous radiation level. The audible, vibration and visual signals are different for each of the three thresholds. Exceeding the threshold values is also indicated by an analogue scale on the LCD. Use the PM1703MO-1 Data Processing Software to change the instrument threshold values. When several thresholds are exceeded simultaneously, the Dose threshold has the highest priority, then goes the Dose rate threshold. The search threshold has the lowest priority Dose Rate Alarm Thresholds The value range of Dose rate thresholds I and II correspond to the instrument dose rate measurement range (0.1 Sv/h 9.99 Sv/h). 21

22 The factory preset threshold values: First dose rate threshold 50 Sv/h. Alarms - the instrument produces a light (red LED), audible and/or vibration signals and LCD backlight is activated. The signals are single, of the same tone, constant and periodic with the same interval and duration of 1 s. Analogue scale filling the first five segments up to Δ segment represents the preset threshold value. For example: Second dose rate threshold 9.99 Sv/h. Alarms - the instrument produces a light (red LED), audio and/or vibration signals and LCD backlight is activated. The signals are of the same tone, alternating single and double ones with a constant duration and interval of 1 second. Analogue scale - filling the scale up to segment represents the preset threshold value. If the radiation background rises, the scale can be filled to the end. For example: Whenever information about exceeding a threshold value is stored in the instrument memory, the LCD screen indicates it by a blinking h (HISTORY) sign Dose Alarm Threshold The value range of the Dose threshold corresponds to the instrument dose indication range (0,1 Sv 9,99 Sv). The factory preset Dose alarm threshold 9.99 Sv. Alarms the instrument produces a light (red LED), audible and/or vibration signals and LCD backlight is activated. Triple signals of the same tone, constant with the same interval and duration of 1 c. Analogue scale filling the scale to the end. The preset threshold value corresponds to the last segment of the scale. For example: Permanent Memory of the Instrument The following data is automatically stored (and can be changed using the software) in the instrument s permanent memory, protecting the data even when the battery is removed: - instrument ID (serial number), date and time stamp each time the instrument is switched on/off; 22

23 - radiation background history in preset data logging intervals; - dose accumulation history; - date, time and values of each dose rate alarm and dose alarm; - date, time and dose rate value of each background calibration; - date, time each time audible and/or vibration alarm is enabled or disabled - date, time each time new n-coefficient is set - current time and date - dose rate data logging intervals - dose rate value each time alarm thresholds are exceeded - information if audible and vibration alarm can be enabled/disabled by control buttons - dose rate alarm threshold values - dose alarm threshold value. ATTENTION! WHENEVER INFORMATION ABOUT ALARM EVENTS IS STORED IN THE INSTRUMENT MEMORY, THE LCD SCREEN INDICATES IT BY A BLINKING H (HISTORY) SIGN. THIS SIGN DISAPPEARS AFTER THE INFORMATION IS READ FROM THE INSTRUMENT MEMORY USING THE PM1703MO-1 DATA PROCESSING SOFTWARE. 23

24 3 MAINTENANCE Maintenance of the instrument involves preventive treatment, battery replacement (see 2.1.3) and regular check up of the instrument. Routinely examine the instrument body, remove any dust, and decontaminate the instrument in situation of direct contact with radioactivity. Wipe the body with and an ethyl alcohol-saturated tissue to decontaminate the instrument. Do not use the instrument if the body of the instrument or LCD protective glass is damaged. 24

25 4 TROUBLESHOOTING 4.1 Troubleshooting is listed in Table 4. Table 4 Possible faults Possible reasons Troubleshooting The dosimeter won t turn on Symbol LCD is indicated on the For PM1703MO-1A and PM1703MO-1B: - indication of zero values in search and DER measurement modes; - OL indication at natural radiation background; - other faults No battery installed or it is placed incorrectly Battery discharge Microprocessor failure Replace the battery or place it observing the polarity Replace the battery Restart the microprocessor: remove the battery and then place it back, pressing continuously the backlight button. Release the button once the LCD indication appears All the other faults are eliminated by the manufacturer. 25

26 5 CALIBRATION TEST PROCEDURE (REFERENCE) 5.1 General This procedure describes the calibration procedure for the PM1701MO-1, PM1701MO-1A, PM1701MO-1B, PM1701MO-2 instruments. The calibration tests shall be performed by qualified calibration facilities. The instruments shall be calibrated during manufacture, after repair and periodically during operation and storage as required by national regulations. 5.2 For operations and measuring instruments refer to the Table below. Operation Paragraph Reference and auxiliary measuring instruments External examination Check-up Testing of , Dosimeter calibration assembly with a reference metrological source 137 Cs in compliance with ISO characteristics Certified uncertainty of the assembly not more than 5 % at 0.95 confidence probability Barometer. Least division 1 kpa. Measurement range from 60 to 120 kpa Thermometer. Least division 0.1 C. Measurement range from 10 to 30 C Hygrometer. Measurement range from 30 to 90 % , Stopwatch. Measurement range from 1 to 600 s Dosimeter. Intrinsic error 15 %. 5.3 Safety precautions During the calibration procedure observe the existing national standards for handling radioactive materials and other sources of ionizing radiation and radiation safety regulations, as well as on-site accident prevention instructions. 5.4 Test conditions: - ambient temperature (20 5) C; - relative air humidity 60 (+20; -30) %; - atmospheric pressure 101,3 (+5,4; -15,3) kpa; - background gamma radiation: not more than 0.20 Sv/h. 5.5 Preparation for calibration tests Prior to calibration, study this Operating Manual and prepare the instrument according to the Operating Manual. 5.6 Calibration procedure During the external examination check the instrument against the following requirements: - the instrument delivery kit shall comply with the operating manual; - the instrument must be marked with clear inscriptions; - the instrument must be free from pollution and mechanical damages that may affect operation of the instrument. 26

27 5.6.2 During check-up it is necessary to check operation of the instrument as described in the operating manual Testing of metrological performance Check the relative intrinsic error of DER *(10) measurement as follows: 1) switch on the instrument; 2) after completion of self-tests, enter the DER measurement mode; 3) place the instrument on the dosimetric calibration assembly so that the gamma detector faces a gamma radiation source and the normal through the detector geometric center coincides with the radiation flux axis (see Figure 1); 4) calculate the average DER of ambient gamma background with no radiation sources. For this purpose, within 600 seconds after entering the DER measurement mode take five readings of the ambient background at intervals of not less than 150 seconds and calculate the average background dose rate, by formula where 1 5 b н bi 5 Н, (1) i 1 bi the i-th reading of the instrument of the background, µsv/h; 5) create reference DER = 3.0 µsv/h in the point coinciding with geometrical center of the detector and irradiate the instrument; 6) in not less than 300 seconds after the beginning of irradiation take 5 readings of DER measurement at intervals of not less than 60 seconds and calculate the average DER value j by formula H j H ji (2) i 1 where ji the i-th reading of the instrument when measuring DER in check point; 7) repeat measurements for the points where reference DER is equal to 8.0; 80.0; 800 µsv/h; 8) create reference DER = 8.0 msv/h in the point coinciding with the detector geometric center; 9) irradiate the instrument; 10) in not less than 100 seconds after the beginning of irradiation take 5 readings of DER measurement at intervals of not less than 30 seconds and calculate the average DER value j by formula (2); 11) models PM1703MO-1, PM1703MO-1A, PM1703MO-1B: perform additional tests in points where reference DER is equal to 80; 800 msv/h and 8.00 Sv/h; 12) calculate relative error of measurement Q j, %, by formula Q j H j H H b oj Н oj 100 where оj reference DER at check point; j average DER value at check point; b average background DER at check point; 13) calculate confidence limits of relative intrinsic error of DER measurement, %, with 0.95 confidence probability, by formula 2 2 (4) 1,1 (Q o ) (Q jmax ) (3) 27

28 where Q o error (uncertainty) of the reference dosimetric assembly, %; Q jmax maximum relative measurement error Q j, %. 14) compare the confidence limit of relative intrinsic error calculated by formula (4) with the limits of relative intrinsic error acc : - for models PM1703MO-1, PM1703MO-1A, PM1703MO-1B calculated by formula acc. = (20+K 1 / +K 2 ) %, (5) where - DER value, msv/h; K 1 coefficient = msv/h; K 2 coefficient = (msv/h) -1 ; - for model PM1703MO-2: acc. = 30 %. The instrument passes the test if acc Test the relative intrinsic error of DE measurements for models PM1703MO-1, PM1703MO-1A, PM1703MO-1B as follows: 1) set the maximum values of DER threshold and DE threshold on the instrument and enter the DE measurement mode; 2) perform item , item 3); 3) read the initial DE value from the instrument; 4) using a reference gamma source 137 Cs, create DER equal to 0.08 msv/h at the point of geometric center of the detector and irradiate the instrument during the time period T equal to 60 minutes; 5) read the final DE value after completion of irradiation; 6) calculate the relative intrinsic relative error of DE measurement G j by formula where Gj H H oj T Н fj final value of DE, msv; Н ij initial value of DE, msv; oj reference DER value at check point, msv/h; Т irradiation time in hours; fj H ij H oj T, (6) 100 7) repeat measurements 1) - 6) for the points at reference DER equal to 8.0 msv/h and msv/h, at T = 120 minutes; 8) calculate the error confidence limit of error of the instrument under test for each measured point with 0.95 confidence probability, by formula 1.1 (G o ) 2 (G j ) 2, (7) where G o error of the reference dosimetric assembly, %; G j relative error of DE measurement, calculated by formula (6), %. Compare the confidence limit of relative intrinsic error calculated by formula (7) with the limits of relative intrinsic error acc. = 20 %. The instrument passes the test if acc.. 28

29 6 STORAGE AND SHIPPING The instruments must be stored in the manufacturer s package without batteries installed at the air temperature between -15 C to +50 C and humidity less than 95 % at +35 C. The shelf life does not exceed the average service life of the instrument 8 years. Instruments without its original packaging must be stored at 10 C to 35 C and humidity less than 80 % at 25 C. The storage place must be free of dust and/or vapors from strong chemicals and other substances that may cause corrosion. Instruments (switched off, in a package) may be shipped by any closed transport at air temperature from -50 C to +50 C. The packaged instruments must be placed and fastened in a vehicle to exclude shocks against each other and against walls of the vehicle. When carried by sea, instruments in package must be packaged in hermetic plastic bags with silica gel. When carried by air, instruments in package must be placed in hermetic compartments. 29

30 7 WARRANTY The manufacturer warrants this instrument to be free from defects in material and workmanship under normal use and service for a period of 18 months provided that the equipment has been used, transported and stored in a proper manner and not subjected to abuse. The warranty is void if the instrument is repaired or altered by others than those authorized by Polimaster. The warranty period is prolonged for a period of warranty repair. The warranty does not cover the batteries. The battery replacement is not considered as the warranty repair. 30

31 ANNEX A (reference) Typical Energy Response of the Instrument in Search Mode % kev

32 ANNEX B (reference) Typical instrument anisotropy Figure B.1 Rotation in horizontal plane Figure B.2 Rotation in vertical plane 32