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GR-130 miniSPEC

1. SPECTRUM 10 STORED IN MEMORY To store data in memory highlight STORE SPECTRUM and AVAILABLE SPACE LONG DOWN Figure 13 appears FOR 112 SPECTRA Note that the GR 130 can store up to 122 complete 256 channel LONG PRESS DOWN spectra in memory The display shows that the spectra just TO CONTINUE stored is 10 and there is space in memory for another 112 spectra Figure 13 Exploranium GR 130 Users Manual page 20 Note that the memory is capable of storing DOSE data SURVEY data and SPECTRAL data simultaneously Thus the available space is computed based on the data already in memory 4 6 4 2 START MEAS This option allows the user to take another spectrum sample without having to go back to the Main Menu and selecting ANALYSIS again Assuming stabilization has not timed out Figure 10 appears when START MEAS is selected and data accumulation begins again 4 6 4 3 SEE SPECTRUM This display shows the spectrum of the last sample analyzed as in Fig 14 same as Fig 10 but repeated here for ease of explanation ANALYSIS bo The display shows a full 256 channel Spectrum over a selected 13 01 116 MEAS range either 0 1 5 or 0 3 MeV specified during SETUP Normally the system is set to the 0 1 5 MeV as most users are primarily interested in the artificial isotopes However if required the full 0 3 MeV spectral range is available see SETUP in Section 4 9 2 4 4 6 4 3 1 Figure 14 CURSOR The Cursor can be mo
2. 5 5 2 POWER REQUIREMENTS Battery voltage 3 V Power usage OPERATION NORMAL WITH BACKLIGHT Measurement 0 65 W 1 2 W Main menu and all setting menus 0 35 W 0 7 W 5 5 3 POWER SUPPLY OPTIONS A Internal Rechargeable Battery Type 2 D cells 1 25 V NiCd Operation time Typically 15 hours of operation at 25 C no backlight 4 AH NiCd Charging External constant current float charger overnight charging full charge indication by LED B Internal Battery Type 2 D cells alkaline Battery Life Typically 25 hours of operation at 25 C no backlight with Alkaline EVEREADY 1250 C External Type 3 VDC 0 5 A external power supply internal battery must be removed Voltage Range From 2 to 5 VDC 5 5 4 CONNECTORS Charger Ext Power Supply 2 5 mm power circular jack on the center pin Mating connector 2 5 mm power circular plug Serial Channel 3 5 mm stereo jack Mating connector 3 5 mm stereo plug 5 5 5 PHYSICAL Dimensions L 9 25 235 mm W 4 5 110 mm H 3 9 100 mm 6 75 170 mm including handle Weight 1 9kg 4 4lbs without battery 2 4kg 5 5 lbs including battery Exploranium GR 130 Users Manual page 44 5 5 6 ENVIRONMENTAL Operating Temperature Range 10 to 50 C Storage Temperature Range 20 to 60 C Protection Weather proof dust and water sealed no immersing Non condensing Relative Humidity Less than 90 at 40 C Vibration 0 5G max 10 300 Hz
3. NOTE The Audio response is NOT affected by this time selection as it is updated at a fixed 20 times second rate 4 9 1 3 CHART RANGE This sets the maximum vertical chart scale in counts for the chart recorder display Selections are 100 200 500 1K 2K 5K 10K 20K 50K and AUTO Some users prefer to have a fixed display so they can judge relative changes in the data while chart recording They can select the desired range from the above selections NOTE If a fixed full scale value is set and exceeded the message OVF overflow will appear on the display to advise users that the upper limit of the chart recorder display has been exceeded However if in a random search most users prefer the AUTO mode as it permits the maximum visual appearance of the chart recorder The AUTO mode automatically changes the vertical scaling to optimize the chart recorder screen display For example if the current chart scale is 500 counts and the radiation level is exceeded by 60 of the current scale the vertical scale changes to the next highest value in this case to 1K or 1000 counts If the number of counts exceeds 65535 the chart record scale will remain at 64K If the radiation level decreases the vertical scale will remain its current level say 2K until the peak that caused the scale change disappears from the chart record 60 samples of data are displayed at one time Exploranium GR 130 Users Manua
4. case of the Dose Survey data it is the number of data blocks every time you start stop in the Survey Dose mode you create a new data file and this data file has it s own header date time etc that is displayed later Checksum Error During data transfer every byte sent to the PC is counted and after transfer an automatic check is made to ensure that every byte transmitted from the 130 was received by the PC Sometimes during data transfer a small data glitch can occur that can cause a loss of data If only a single byte is lost usually no real data errors occur but if many bytes are lost then data can become corrupted To ensure minimum problems if a Checksum Error is seen then the data transfer operation should be repeated using a new data File Name If the same error occurs again inspect the data if all looks OK then ignore the error if the data looks corrupted then it must be assumed that some problems are occurring in the GR130 memory In this case see manual Section 4 10 4 for more information 3 2 Load Data File for Processing This permits the user to load a new stored data file for analysis If this option is selected the user must select the required data file from the directory then select Open to load the file Note that the data file name selected is shown on the upper right of the display Exploranium GR 130 Users Manual page 51 3 3 Select Background Spectrum This permits a BACKGROUND spectrum to be
5. Selectable R Sv Gy Meas range Sodium lodide only 1 uR h 5 mR h System may overload at the higher level at a different rate depending on the isotope Approximate maximum levels are 2mR h for Am 241 and 5 mR h for Cs 137 Meas Range Optional G M tube 1 uR h 1R h 10nSv h 10mSv h system will overload at 3R h Precision Nal 2 in range 100 keV 3 0 MeV 10 in range 60 keV 100 keV Output Memory or PC 5 4 MISCELLANEOUS 5 4 1 CLOCK CALENDAR Type Built in 24 hour clock 4 year calendar including leap year Full battery backup 10 year retention time Precision 3 s day at 25 deg C 30 s day over full operating temperature range 5 4 2 DATA STORAGE Type 128 kB CMOS SRAM memory with Li battery back up Capacity 16 360 samples including time date SURVEY and DOSE mode 122 spectra ANALYSIS mode 256 channels including time date Data Retention Time Typically 10 years limited by Li battery life Stored Data Retrieval Via serial channel to a computer Exploranium GR 130 Users Manual page 43 5 4 3 DATA OUTPUT Type Serial channel RS 232C 1 start bit 8 data bits no parity 1 stop bit Baud Rate 9600 Bd Format Binary see Appendix C 5 5 GENERAL DATA 5 5 1 DISPLAY Type WTSTN Wide Temperature Super Twist Nematic graphics LCD 128 x 128 pixels LED backlight Viewing area 67 x 67 mm Contrast Digitally adjustable in 20 steps by joystick in selection menu
6. XYZ directions 1 h Shock 3G 10 mS XYZ directions 1 time each RFI EMI Emission Complies with FCC rules 47 CFR Part 15 for class A Full CE Certification 5 6 ACCESSORIES Standard GR 130 Unit 110VAC Charger Adapter for battery charging Vinyl carrying case 3 5 disks with SpecView Windows software RS 232 cable for PC connection Reference Source Cesium 137 0 25 Ci Operating Manual Padded compartmentalized carrying case Optional 220 VAC Charger Adapter for battery charging DOCKING STATION for automatic charging and PC connection 2uCi Cs source if permitted by local regulations High sensitivity GM tube to extend Dose range to 1R h BGO detector for special applications 130M software for Medical applications French or German software versions available Exploranium GR 130 Users Manual page 45 APPENDIX A ERROR and DISPLAY MESSAGES A 1 ERROR CODES 1 SLAVE ERROR SWITCH OFF Fatal Error lost communication with slave processor this indicates a serious internal data processing error impossible to continue Contact Exploranium 2 MEMORY ERROR Fatal Error data memory test failed Memory unstable impossible to continue 3 NO SURVEY COUNTS Temporary Error indicates that the countrate is below a certain minimum for a particular sample automatically erased if next sample is OK 4 GAIN ERROR SYSTEM UNUSABLE CONSULT MANUAL Not necessarily a fatal e
7. manual section 4 5 3 shows the peaks for Cs 137 Correct peaks for the 130M are 750keV chn 220 and 3MeV chn 55 Exploranium GR 130 Users Manual page 64 APPENDIX G GR 130G GEOPHYSICAL version details This appendix describes operational differences between the standard GR 130 system covered in the Operating Manual and the GR 130G system specifically optimized for geophysical applications Most of the main manual covers both instruments but the following section details the differences A GENERAL The GR 130G is an excellent reconnaissance tool for geological applications In addition to functioning as a scintillometer in the SURVEY MODE it will provide an indication of the ground concentrations of K U and Th using the ASSAY MODE The crystal detector volume that is the current industry standard for portable spectrometers is the 21 in 0 35 L Nal detector as used with the Exploranium model GR 320 The GR 130 unit is available with either a Sodium Iodide or a BGO detector The following comparison is a guide to the performance of the GR 130G units using the GR 320 as a comparison and shows why the BGO version is preferred for Geophysical applications Typical Ground Concentrations 2 K 2 ppm eU and 8 ppm eTh Sample Interval 120 seconds GR 320 GR 130G Nal GR 130G BGO Crystal Volume 21 in 0 35 L 4 5 in 0 07 L 4 5 in 0 07 L Relative Efficienc
8. spectrum in memory SPECTRA 1 Note that each time a SAMPLES 16181 new set of dose or survey data is saved to memory a new or header is also saved which requires storage space SPECTRA 121 equivalent to 5 samples Figure 21 Therefore SAMPLES 45 may indicate storage of 1 header with 40 samples or 2 headers with 35 samples etc SPACE AVAILABLE This indicates available space for additional sample or spectral data Here there is memory available for 16181 sets of DOSE SURVEY data or 121 complete 256 channel spectra or some combination thereof 4 8 1 1 MEMORY SPACE The DOSE and the SURVEY data are stored in an identical format header information distinguishes between them and both data types have identical size formats For all data storage the header is written to memory first and then each data sample is recorded separately The header is 30 bytes in size and each sample is 4 bytes Thus a 10 sample record contains Header 30 bytes 10xSample 4 40 bytes TOTAL 70 bytes Therefore the amount of memory space occupied by data is a function of how many samples are recorded The system automatically computes available space based on this information but considers the presence of only one set of header information and the rest being data If the user takes separate sets of readings i e more than one header the number of samples required to fill the data memory will be less than that calculated by the GR 130 due to the memory
9. 128 channel mode is selected an enhanced display is shown in which the cursor moves visually one pixel per click left or right This is because only 128 channels half the spectrum are displayed at any time to permit a high visual resolution Cursor Contents This shows the number of counts accumulated at the channel where the cursor is currently positioned This displays the number of the ROI Region of Interest selected When the ROI is zero 0 the Total counts in the entire spectrum are displayed ROI 1 2 and 3 are selected in the SETUP menu Different ROIs can be selected by moving the cursor If the cursor is at any channel in the selected ROI range the ROI data is selected Thus if ROI 1 is set for channels 50 60 and the cursor is at channel 50 or 51 52 the display will indicate ROI 1 Counts This displays the actual counts in the selected ROI and is the sum of all the individual channel counts Thus if ROI 1 represents channels 50 60 this data would be the sum of all counts between channel 50 and 60 inclusive Displays the preset Sample Time in seconds Sample time is selected in SETUP mode Displays the incrementing time of the current measurement in seconds Note that this parameter may be displayed as LT or CT LT shows that LIVE TIME mode was selected in the SETUP menu In this mode the system clock is extended to automatically correct for the system Dead Time Thus if in a 1 second 1000mS time increment the
10. Dead Time was 3 mS the 1 second sampling period would actually require 1 003 seconds 1003mS seconds to complete This compensates for the counts lost during dead time LT is the default setting Exploranium GR 130 Users Manual page 19 CT shows that CLOCK TIME was selected in the SETUP menu Clock time means that the sample time is fixed and dead time is not corrected for In this case a 1 second sample period requires 1 second to complete and no additional sampling time is added to account for the counts lost during dead time See Section 4 10 2 3 for more details on Dead Time correction When the preset Sample Time is complete the data accumulation terminates and Figure 12 appears 4 6 2 AUTO POWER OFF At the end of the preset sample period the display normally goes to Fig 12 However if the sample period terminated and there is no user action for 2 5 minutes the system will automatically power off to conserve battery life If the user powers ON again the system will automatically go to Fig 12 with the spectrum still In memory so the user can continue with the analysis options 4 6 3 DATA OVERFLOW Due to the nature of the Nal detector and signal processing hardware within the GR 130 saturation occurs when radiation levels become very high During analysis if the number of counts in any one channel looks like it will exceed 65535 counts the sample period is terminated and a special message occurs on the display see Fi
11. Full Exploranium GR 130 Users Manual page 48 APPENDIX B SpecView SOFTWARE A special program SpecView is supplied for basic data analysis This program running under Windows 9x or 2000 permits data importing data display data output and a variety of printer options for chart data display 1 0 GENERAL Version 3 1 is the current release of this software Note that the software is NOT INTENDED AS A COMPLETE PROCESSING SYSTEM FOR THESE DATA It IS INTENDED as a quick look capability with a reasonable number of data enhancement capabilities The software s ability to output the data in a spreadsheet format will permit users to develop customized data processing using spreadsheets or Graphical Information System GIS packages SpecView was developed by Exploranium using National Instruments LabVIEW software development system 2 0 INSTALLATION System installation is a 2 step process a SpecView 1 disk install from Windows Desktop using RUN Insert Disk into the disk drive In Windows select RUN then BROWSE to locate Disk A then select the Setup file click OPEN to load this file then OK to activate it follow screen prompts to complete the installation once installation is complete the program will ask for installation of the Run Time Engine see below b RUN TIME ENGINE 2 disks the SpecView program is written in LabView code and requires various support programs to run correctly Insert Disk 1 of 2 in
12. MEMORY PUSH BUTTON DOWN Users Are Warned That Erased Data Cannot Be Recovered THREE TIMES TO CANCEL PUSH BUTTON UP Figure 23 4 8 4 SPEC SCAN This selection lets the user inspect and re analyze spectra previously stored in memory o LONG DOWN shows Fig 24 SPECTRUM H 1 YY MM DD HH MM SS Figure 24 The user must CLICK LEFT RIGHT to select the required spectrum The spectrum number is the same one used as a label during the spectrum store The Date Time of the recorded spectra are also provided for reference Exploranium GR 130 Users Manual page 30 Once a spectrum is selected then LONG DOWN activates this feature and the selected spectrum is displayed as in Fig 25 The displayed data is described in section 4 6 4 3 13 01 116 MEAS The ROIs selected in SETUP see 4 9 3 are highlighted on the spectrum display Figure 25 A LONG DOWN takes you to the ANALYSIS M menu as shown in Figure 26 4 8 4 1 ANALYSIS M This menu is similar to the ANALYSIS selection menu described in Section 4 6 but the STORE SPECTRUM capability is eliminated to ensure that the user does not store this spectrum again SPEC SCAN permits selection of another spectrum from memory The other selections permit peak Analysis Nuclide Identification etc as described in Section 4 6 4 MAIN MENU returns to the Main Menu 4 9 SETUP This sub menu shown in Figure 27 is used to set the GR 130 s operational parameters A sel
13. Meter which displays both Instantaneous Dose and Accumulated Dose in the selected units R REM A unit of Dose equivalent Gy GRAY SI unit of Absorbed Dose Sv SIEVERT SI unit of Ambient Dose Equivalent H 10 See Section 4 7 for more details Selecting this menu item will show the status and options for the internal data memory The data memory provides storage for approximately 120 sets of spectra data 3 10 See Sections 4 9 and 4 10 for details for the SETUP and MAINTENANCE menus Exploranium GR 130 Users Manual page 10 4 0 OPERATION DETAILED The GR 130 is equipped with a rubber covered button on the joystick handle hereafter referred to as the BUTTON Under normal conditions the BUTTON may be moved UP toward the OFF position DOWN toward the ON position LEFT or RIGHT A SHORT activation or CLICK of the button defined as CLICK DOWN or CLICK UP will scroll up and down through the Menu options highlighting the current selection Once the desired menu item is highlighted holding the button in the ON position for 1 second referred to as LONG DOWN will activate this item In some of the Maintenance options CLICK LEFT or CLICK RIGHT is used to change the selections or change screen contrast Holding the button in the left or right position will activate the Auto Repeat function which enables the user to scroll through the available settings within a setup item 4 1 1 BATTERIES The GR 130 operates
14. display data is updated every second and this numeric display always shows Ai If the sample period is 5 seconds the current count rate is updated every 5 seconds and this mark counts out the current state of the period 1 2 3 4 5 1 2 3 4 5 etc 100 This is the vertical scale of the chart recorder 100cps and can be set to Manual or Auto mode in the SETUP menu as described below CHART RECORDER The data in the box at the bottom of Figure 5 shows the last 60 samples of data in a chart recorder format Therefore at a one second data rate 60 seconds of data are displayed OR at a five second data rate 300 seconds of data are displayed The first sample is highlighted for emphasis The Chart Record is updated at the end of every sample period STOP LONG DOWN will stop data recording and the MEAS message will be replaced with STOP i This terminates measurement and allows the user to view the chart record if required LONG DOWN will return to the MAIN MENU Additional display messages ALARM When the audio meter is set to OFF selected in the SETUP menu an audio ALARM functions If the Audio ALARM LEVEL is set to a preset value and the radiation field exceeds this value an audio beep will be heard and the word ALARM will be shown on the display next to TIME OVF If a fixed vertical scale has been set for the CHART RANGE selected in SETUP mode and the current countrate exceeds this level the label
15. procedure about once a month and let the batteries discharge overnight The next day connect the battery charger and charge for at least 6 hours If this procedure is followed the battery life will be significantly increased 4 10 3 REMOTE Remote mode is used for the uploading of libraries see Appendix B To prevent inadvertent activation of this mode the mode can only be enabled if the external PC is connected and a special code is transmitted from the PC as in Appendix B There is a 60 second Timeout on the Remote mode Once selected the external PC must connect within this time period or an audio beep occurs and the Remote mode is terminated Once the PC has connected then this Timeout is cancelled and the GR 130 auto Power OFF feature is suspended to ensure that the unit stays active as long as the PC is connected When the PC program exits it automatically cancels the Remote mode and returns the system to normal operation 4 10 4 DEFAULT nder certain conditions the user may want to revert the system to e ESE the original factory set parameters If this mode is activated Figure 33 is displayed DEFAULT LOADED NOTE Under special conditions computers can act erratically PUSH BUTTON DOWN usually caused by a transient affecting the computers CPU while THREE TIMES writing to RAM If this happens system performance may be erratic as system parameters can be incorrectly overwritten TO CANCEL PUSH BUTTON UP Figure 33
16. range from 1uR h to 1R h 10nSv h to 10mSv h Exploranium GR 130 Users Manual page 25 NOTES Es In either case software version 3V15 limits the maximum Dose rate to 3R h as above this level the user has a serious Exposure problem and the instrument can suffer permanent damage to sensitive components PMT tube if prolonged exposure above this level occurs If older units are returned for Calibration a special software version is used for Type A tubes to ensure that correct Calibration occurs Only Type B tubes are available in the future unless the user specifies an extended Dose range requirement in which case the older Type A tubes can be installed AT EXTRA COST The G M data exhibits the usual 20 errors over the full spectrum energy range unlike the much more accurate Sodium Iodide Dose Rate The changeover point from the Sodium Iodide detector to the GM tube is a function of incident photon energy It therefore occurs at different dose rates for different radio nuclides Note that the Sodium Iodide detector is located immediately behind the front face of the instrument In older GR 130 units the G M tube was located approximately 10cms behind the front face In most cases this is not a problem especially for Cesium 137 Dose measurements However for the lower energy isotopes the geometry can cause Dose measurement errors In newer units this problem has been overcome by moving the G M tube to a point just behind
17. represents approximately 12 keV NOTE This selection affects the ANALYSIS mode only to improve analysis capability in the lower regions of the spectrum where narrower peaks require more precise analysis Selection of the DOSE mode automatically sets the system to 3 0 MeV to ensure that the DOSE is computed correctly by utilizing all the emission spectrum Similarly in SURVEY mode the 0 1 5 MeV range is automatically selected to give improved system sensitivity NOTE MEDICAL USERS GR 130M units described in Appendix F In this model the 1 5 and 3 0MeV ranges are replaced by 750keV and 3 0MeV ranges to permit higher analysis accuracy for the lower peaks required for Medical isotope analysis 4 9 2 5 AUDIO Selectable ON or OFF ON With this selection the system will beep to advise the user that the sample has ended OFF With this selection there is no audio warning to advise the user that the sampling period has ended 4 9 2 6 SAMPLING Selections are SINGLE REP MEM REP PC SINGLE In this mode a single spectral accumulation is performed for the preselected sample time and the system then returns to the ANALYSIS Menu Figure 9 so the user can select data analysis or data display as required This is the default operating mode REP MEM Selecting this mode results in automatic data recording where each spectrum measured is stored in system memory at the end of sample A new sample begins at the preselected repetit
18. the Dose changes abruptly then it takes 10 seconds for the full value to be seen on the display so there is a delay in response OFF this cancels the average method and data is displayed as per the selected SAMPLE RATE 4 9 4 4 SAMPLE TIME not shown if AVERAGE is ON as detailed above Selections are 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 This sets the actual update time in seconds of the DOSE measurement If a 5 second sample time is selected when the DOSE mode is started the display is blank for 5 seconds and then displays the current reading This display will then stay constant for another 5 seconds and then the new value will be seen NOTE If AVERAGE ON then SAMPLE TIME is replaced by AVER TIME as in this mode the unit updates at the basic 1 second mode but the averaging reduces the statistical variations Exploranium GR 130 Users Manual page 38 4 9 4 5 CORRECTION Selections are 0 5 10 15 20 5 10 15 20 This feature permits users to change the Dose Calibration to suit local standards The system should correctly be set for 0 However if a local calibration shows that the system is reading 10 high then adjusting this parameter to 10 will correct the data to achieve local calibration NOTE Users should leave this setting at 0 if at all possible as careful calibration has shown that this is the correct value and many calibration facilities may be inaccurate at the lower Dose levels
19. the front face of the instrument thus the tube is not masked in any way so the Dose Rate for lower energies is significantly more accurate Older G M mount systems can be upgraded if required please contact Exploranium if this is a requirement Manual section 4 7 2 warns users that below 100keV the G M tube used for high dose levels is not very effective If low energy sources such as Am 241 are used then often the Nal detector will saturate and the G M tube being very insensitive to such peaks will probably give essentially no data so the actual reported Dose rate would be incorrect To minimize these problems some new tests and messages have been added to the system Nal DETECTOR OVERLOAD s displayed when the Nal detector is effectively saturated If the MEAS no GM is also displayed then the Dose is clearly incorrect as there is no real Nal data and no GM data so the Dose display goes blank as a warning GM DETECTOR Overload displayed when the GM is saturated obviously at this point the Nal is also saturated so the Dose display goes blank as a warning Users should be reminded that the GM tube is mounted approx 5cms behind the Nal detector so Dose measurements from the GM tube for sources close to the face have some inaccuracies See section 4 7 6 Calibration for more details 4 7 3 DOSE MODE RECORDING DATA The data displayed during the time that the DOSE mode is active can be recorded in data memory or to a PC
20. to correct the data for the lost sampling time as shown in the following example ST 100 000 secs LT 91 373 secs Channel 128 1850 counts after the 100 secs sample 18 5 counts sec The REAL value for Channel 128 1850 91 373 20 25 counts sec As can be clearly seen LIVE TIME correction is essential for proper data analysis To make data analysis simpler the user has 2 options on how to correct this effect by as follows LIVE This setting enables an automatic correction method and this correction essentially increases the sample time by the Dead Time to account for all the pulses that would have been lost because the electronics were too busy to process the incoming pulse If LIVE mode is selected the preset sample period is AUTOMATICALLY extended by the Dead Time so the final data is automatically Dead Time corrected Thus if you set a 100 second sample period and there is a 10 Dead Time then the actual sample period will be approximately 110 seconds thus all the lost time has been compensated for and the data represents a true 100 second sample The selection of LIVE mode is an advantage to users who want automatic operation to minimize data processing In low count areas extending the sample period also gives slightly more accurate data The main drawback to this mode of operation is that the actual duration of the sample is variable CLOCK In this mode the preset sample time is the actual sample t
21. used in the GR 130 4 9 4 6 ALARM LEVEL This sets the DOSE Alarm Level Once set if the Dose exceeds this level the audio will alarm to warn the user Note that this setting changes depending on the units selected as follows R OFF 10 20 50 100 200 500 1000 2000 5000 uR h Sv OFF 0 10 0 20 0 50 1 0 2 0 5 0 10 20 50 uSv h E Gy OFF 0 10 0 20 0 50 1 0 2 0 5 0 10 20 50 uGy h 4 9 5 CAL CLOCK This selection permits the user to set the correct Date Time for their location The stored data is Date Time stamped so it is important that these values are set correctly The Date Time features are Y2K compliant including leap year In setting the clock a LEFT or RIGHT click selects the data to be changed and UP or DOWN click changes the data In the SECONDS position clicking UP zeros the seconds if the number of seconds were above 30 when the reset occurred then the minutes will also be incremented automatically 4 9 6 BATTERY This function allows the user to select the type of the batteries in use either ALKALINE or NiCd rechargeable The selection of the proper battery type is important as it changes the range of the Battery Icon used to show battery status and sets the correct voltage cut off level for maximum battery operation The shaded area of the battery icon indicates the remaining charge The battery icon range is as follows Alkaline 2 0 to 3 0V Nickel Cadmium 2 2 2 5 V Operating the unit when th
22. with two rechargeable NiCd OR two alkaline D cell batteries Always be sure that BOTH batteries are the same type Do not mix Alkaline and NiCd batteries The NiCd batteries can be recharged without removing them from the GR 130 by plugging in the supplied charger through the port provided behind the battery backdoor DO NOT ATTEMPT TO CHARGE ALKALINE BATTERIES THIS WILL SERIOUSLY DAMAGE THE UNIT After changing battery types always go to the Setup Menu and specify the type of battery being used See Section 4 9 6 for further details If cycling problems arise with the NiCd rechargeable batteries they can be fully discharged using the NiCd COND function in the Maintenance Menu See Section 4 10 2 for further details NOTE SYSTEM DESIGN GIVES THE USER BATTERY STATUS INFORMATION and an AUDIO WARNING OF IMMINENT BATTERY FAILURE HOWEVER RECHARGEABLE BATTERIES GIVE VERY LITTLE WARNING OF AN END OF CHARGE CONDITION IT IS RECOMMENDED THAT USERS CARRY A SPARE SET OF ALKALINE BATTERIES IN CASE THE RECHARGEABLE BATTERIES FAIL DURING OPERATION 4 1 2 LOADING BATTERIES To load batteries remove the battery backdoor at the rear of the instrument by applying a 1 4 turn to the door handle Insert two D cell batteries alkaline or NiCad with the to the small brass ring and the to the spring The fabric strip should be placed BEHIND the batteries to aid in their removal Ensure that both batteries are firmly seated then re attach the doo
23. yellow tube in the hole in the yellow boot at the end of the GR 130 Figure 7 with the source label facing the instrument LONG DOWN to begin stabilization Figure 8 will appear showing a progress clock TIMEOUT 0 1 2 3 etc until correct Stabilization is achieved this process usually hdl takes less than 60 seconds a n STABILIZATION Occasionally a message COMPUTING replaces the TIMEOUT IN PROGRESS message on the display This advises users that analysis is still in progress TIMEOUT 1 2 3 Figure 8 When system stabilization is complete data appears similar to that shown in Figure 9 The information is interpreted as follows as STABILIZATION OK advises the user that the procedure was successful STABILIZATION OK PEAK 109 8 ch shows that the Cesium peak after correction was PEAK 109 8 ch set at Channel 109 8 FWHM 7 2 GAIN 96 NOTE 1 5MeV peak ch 110 1 0ch 3 0MeV peak ch 55 0 5ch 1 5 or 3 0 MeV mode is selected in SETUP REMOVE Cs SOURCE LONG PRESS DOWN GR130M 0 75MeV peak ch 220 1 5ch Figure 9 A peak channel outside this range indicates incorrect stabilization or system error FWHM 7 2 This is the Full Width Half Maximum Resolution of the detector and is a measure of the quality of the detector Refer to the supplied System Calibration Sheet which defines the actual FWHM of the unit after manufacturing This value should remain relatively constant 0
24. 0 memory is full the message MF memory full will be displayed at the top of the screen and the GR 130 will beep 3 times Although the unit will continue to display the message DOSE gt MEM no additional data will be saved to memory until the current data is erased Stored data can be downloaded to an external PC via the data transfer cable provided with the unit using the supplied SpecView software See Appendix B for more details It is critical that the GR 130 be turned OFF before connecting the unit to the data transfer cable If the unit remains ON any shock or power surge arising from the connection may corrupt data in memory To record data to a PC the user should select Output to PC in the Setup Dose Meter menu The user should then start SpecView on their PC and follow the instructions found in Section 4 4 1 Survey Mode Data Recording to start a file and log data To view this data after logging is terminated left click View Dose Data The use of SpecView is explained in more detail in Appendix B 4 7 4 DOSE RANGE In the Dose Meter mode the GR 130 automatically selects the 0 3 0 MeV spectral range with a lower signal threshold of approximately 40 keV See Section 4 9 2 4 for further details 4 7 5 DOSE CORRECTION The DOSE calibration has been carried out under carefully controlled conditions at 3 National Laboratories Canada Austria and Czech Republic In each case lengthy technical discussions had
25. 10 23 unsigned char unit dose meter mode R G S 24 27 unsigned long geiger GM tube accumulated dose 28 29 unsigned int Ser serial of the instrument 30 31 unsigned int Ver software version 301 3V02 32 unsigned int modification C Customs G Geological 33 47 unsigned char spare 15 bytes spare C 2 SPECTRUM Byte data type name comments 48 51 unsigned int Itime live time in mSec channels 1 2 52 557 unsigned int spec spectrum channel channels 3 255 558 559 unsigned int cosmic cosmic channel channel 256 560 unsigned char CHSUM check sum C 3 DOSE Byte data type name comments 48 4 n 47 float n dose n dose measurement results 4 n 48 unsigned char CHSUM checksum C 4 SURVEY Byte data type name comments 48 4 n 47 unsigned long SURVEY n SURVEY measurement results 4 n 48 unsigned char CHSUM checksum Exploranium GR 130 Users Manual page 58 C 5 PARAMETERS Byte data type name comments 1 unsigned char contrast actual contrast 22 42 2 3 unsigned int stime preset time for Analysis in seconds 4 unsigned char meas_mode 0 LIVE 1 CLOCK 5 unsigned char arange Coarse Gain range 0 1 5MeV 1 3MeV 6 unsigned char aaudio audio O OFF 1 ON 7 unsigned char am_mode sampling mode O single 1 to MEM 2 to PC 8 unsigned char disp _ mode no of chns in display window 0 256 1 128 9 10 unsigned int rep_time repeat time in seconds 11 unsigned char roi_od 0 0 roi 1 start channel 1 5MeV 12
26. 5 if the detector is functioning normally If the FWHM changes by more than 1 under normal operation this indicates that the detector is slowly failing Any value above 10 shows that a serious problem has developed and the system needs repair immediately Exploranium GR 130 Users Manual page 17 4 6 4 6 1 GAIN 96 This is the result of the automatic system gain adjustment The GR 130 has 256 automatic gain adjustment steps In the factory at room temperature 22 C 72 F this gain is set to approximately 125 actual value shown on System Calibration Sheet As the temperature changes and component aging occurs the gain is automatically corrected during the Stabilization period to correct for any system drift and to keep the system correctly tuned A gain value between 50 and 200 indicates that automatic system control is within control limits If the value of GAIN falls outside this recommended range please contact Exploranium If the gain is too low a special GAIN ERROR MESSAGE will be shown as a warning to the user of possible system malfunction See Appendix A for further details A LONG DOWN returns to the Main Menu ANALYSIS This mode enables detailed spectral analysis and permits spectrum display peak identification and nuclide identification NOTE IT IS IMPERATIVE THAT STABILIZATION IS CARRIED OUT PRIOR TO ANALYSIS OR THE RESULTANT DATA MAY BE INACCURATE A SPECIAL STAB TIMEOUT MESSAGE Figure 6 ALERTS
27. AYS the system is calibrated to the AIR KERMA RATE for Dose in GRAYS R a conversion factor is used GRAYS R x 114 NUREC ICRU 47 Sv 5V15 is directly calibrated in Ambient Dose Equivalent H 10 older versions used a conversion factor GRAYS SV x 1 14 LOW ENERGY Accurate Dose measurements in the Energy region below 100keV is always a problem as at these energies the mechanical instrument coverings significantly reduce actual Dose values 5V15 includes a significantly improved Calibration accuracy for Dose below 100keV 4 8 DATA MEMORY Selecting DATA MEMORY from the Main Menu will produce the menu Za shown in Figure 20 This menu permits inspection and manipulation of the system s internal data memory STATUS DUMP ERASE SPEC SCAN MAIN MENU Figure 20 Exploranium GR 130 Users Manual page 28 4 8 1 STATUS Selecting STATUS shows the current state of the data memory The GR 130 can store data from the 3 operational modes SURVEY DOSE and ANALYSIS in different formats Each set of data is tagged with a special header that identifies the type of data The DOSE and SURVEY data are classified as SAMPLES and ae ae ANALYSIS data are classified as SPECTRA A sample display is STORED shown in Figure 21 SAMPLES STORED This indicates the current status of data storage Here SPECTRA there are currently 45 samples of Survey or Dose data in SPACE AVAILABLE memory SAMPLES 45 and one complete 256 channel
28. Data Header The O buttons step through a the spectra and display each SpecMiewTesti Red Spectrum Laa Linear Scale Main Menu Background OFF La spectra in BLUE The selected spectra number is displayed as a number in this location and also on the X axis below the chart af anes ORI 6 100 200 300 400 500 600 00 800 900 1000 1100 1200 1300 1400 15001568 y The Vertical data is auto scaled There is a UP DOWN arrow on the left that can be used to scale the display Energy ke Exploranium GR 130 Users Manual page 52 The X Y scales can also be manually adjusted by clicking on them erasing the current value and typing in a replacement value then pressing ENTER to accept this new value Note any manual scaling automatically reverts to auto scale when the next spectra is selected The data scaling uses exponent values for higher levels to simplify the data display The Horzt scale in keV is scaled using an internal Quadratic function for Channel keV conversion derived from the actual system calibration data The spectra are normally displayed on a vertical Linear scale but clicking the LINEAR SCALE button changes it to LOG SCALE and the spectra are displayed on a Log scale The user can also click drag the BLUE triangle below the X scale to quickly select the required spectrum number The RED triangle on this scale can also be used to select another spectrum for display in
29. Exploranium GR 130 Users Manual page 62 APPENDIX E NUCLIDE LIBRARIES In Appendix B the SpecView program describes how to select a custom library and how to upload this library The available library selections are contained in an ASCII file that is installed with the SpecView program called NUCLIDE DEF a LISTING of NUCLIDE DEF file included with SpecView Am 241 Eu 154 Mn 54 Tc 99m Ba 133 F 18 Mo 99 Th 232 Bi 207 Fe 59 Na 22 TI 201 Cd 109 Ga 67 Na 24 U 233 Ce 139 I 123 Np 237 U 235 Co 57 I 125 Pd 103 U235 8 Co 58 I 129 Pu 239 Xe 133 Co 60 I 131 Ra 226 Y 88 Cr 51 In 111 Se 75 Y 90m Cs 137 Ir 192 Sm 153 DEP U K 40 Sn 113 Eu 152 Kr 85 Sr 85 NOTE Users are advised that library selection is a complex problem Sodium Iodide detectors have limited Resolution thus many peaks may coincide and make accurate identification difficult To minimize these problems Exploranium suggest the following rules for Library creation a Select the MINIMUM number of isotopes possible to suit the users application If too many isotopes are selected then peak interaction and inaccurate Identification may result b Select the required isotopes carefully as described below Cc Once the new library is uploaded into the GR 130 the user should TEST it carefully to ensure that correct operation in the users environment is achieved NOTE If faulty identification occurs please contact Exploranium Jens Hovgaard or Irian Komar and provide a list of is
30. GR 130 miniSPEC USER MANUAL PART 87010 Rev 15 1 July 1 2001 Software Version 5V15 or higher Exploranium GR 130 Users Manual page 2 EXPLORANIUM RADIATION DETECTION SYSTEMS GR 130 miniSPEC Portable Gamma Ray Spectrometer USER Manual Software Version 5V15 Table of Contents 1 0 GENERAL SYSTEM DESCRIPTIONS acia AR 4 1 1 GR 130 DIFFERENT MODELS usina ido cds 4 12 SOFTWARE RELEASES Sorrir di 4 2 0 SYSTEM DESCRIPTION amp FEATURES c oocmooccoocconocoonncnnnnanrnnronnrrnnrnnnnnn ren nrnnn enana nnana 5 2 1 OPERATION AL MODES 0 ia a A A di 5 2 2 SYSTEM PEA TOUR ES 00 iio ON di tele 5 SO QUICKSTART Roa cacao arcade 8 4 0 OPERATION DETAILED coo ceteuensrdessdeediusdsensdewsnsteaienicinss 10 4 1 POW ER roo e ARO 10 4 1 1 BATTERIES aca aa Ae aE e A EA 10 4 1 2 LOADING BATTERIES Son 10 4 1 3 POWER ON aiii 11 4 1 4 BACKLIGHT ON voivodato wna ea 11 4 1 5 POWER OFF MANUAL ica add a 11 4 1 6 POWER OEE AUTOMATIE 05 ARA 11 4 1 7 LOW BATTERY WARNINGS sido camarera ainia delas dae zada 11 4 2 DISPLAY CONTRAS Tai a o dada 12 4 3 MAIN MENU cari dd clued dia 12 Hd SURVEY ao E E alba 13 4 4 1 SURVEY MODE DATA RECORDING coooccccconnncononnnaccnnnnnnnrononnnannnnnnnanznnns 14 4 4 2 SURVEY RANGE cortina so it o 15 4 5 7 STABILIZATION GENERAL iaa rn aa id 15 4 5 1 STABILIZATION TIMEOU Tonic id dni dc 15 4 5 3 STABILIZATION PROCEDURE sucia a 16 46r ANALYSIS aia ca ada lirica 17 4 6 1 STAR
31. GS oc 45 47 FWHM ResolutiOn ccoocccccccococononanonaninans 16 21 23 40 41 GM TUDE uN 4 15 23 26 Geophysical usage oocccooccccncononnnnnnnnnonnnnnnnos 4 64 Latest Features isinsi ie ainei 68 69 LiVe TIME iaa dci 18 41 56 Medical usage uri 4 35 44 63 MEMO orarin airea a laa 9 4 19 25 28 Nickel Cadmium batteries 6 28 39 Nuclide Identification ccsccsecseeeeeeeeeeeees 5 17 19 22 23 47 Nuclide Library accesorios 22 23 38 54 55 Peak A alySiSran iaaii eneninda 21 23 47 RO Sa ade 18 20 36 o than tees een ee eee See ce cannes 4 7 23 48 SOCIUM lOGIdG ecos 4 5 13 15 23 26 Spectrum aruia aariaa tgi 17 21 SpecSca fa aa anai anaana aaa aaan Eaa 29 Specificati NS voir a 40 PEC I Wi idia tia dia 48 A A 15 16
32. M ANALYZER ANALYSIS MODE Meas time 10 20 30 100 200 300 600 1200 1800 3600 5400 seconds Meas mode Clock time or Live time selectable Energy range Selectable GR 130 25 keV 1 5 MeV or 50 keV 3 0 MeV GR 130M 25 keV 750keV or 50 keV 3 0 MeV Audio Alert OFF ON Modes of measurement Single Repeat gt Mem Repeat gt PC Repetition time 1 10 20 30 60 120 minutes of Energy Windows ROI 2 pairs of 3 ROI s for 1 5 and 3 0 MeV 1 to 6 can be highlighted on the display ROI Setting Range 0 Fixed 2 254 ch total input count 1 3 Set anywhere in the spectrum by the user Peak Evaluation Peak position computation 0 1 channel precision FWHM computation 0 1 precision Gross Net area computation Energy Calibration Precisely converts channels to energy Exploranium GR 130 Users Manual page 42 5 3 3 DIGITAL SPECTRUM STABILIZER STABILIZATION MODE Procedure Uses photo peak of Cesium 137 for spectrum stabilization by automatic gain control Stabilization peak setting depending on mode selected GR 130 0 3MeV Channel 55 GR 130 0 1 5MeV Channel 110 GR 130M 0 750keV Channel 220 Confidence Level Set to 1 024 cps Peak Precision for Cs 137 0 750keV 1 5ch 0 1 5MeV 1 0ch 0 3MeV 0 5ch 5 3 4 DOSEMETER Sample time 1 2 3 10 20 30 605 Energy range 50 keV 3 0 MeV set by the spectrometer Meas units
33. M TUBE to extend the dynamic range in the survey mode and for measuring high dose rate DOCKING STATION OPTION A DOCKING STATION is optionally available for the GR 130 This device is a cradle that the GR 130 unit sites in The cradle is connected to the AC connection has an internal radioactive source and may be connected to a PC 3 fingers on the base of the GR 130 connect to mating 3 fingers on the Docking Station to provide charging and data connections without opening the rear access data door Some users find that the Docking Station internal source makes it easier to control sources as the normal source supplied is small and may be misplaced Please contact Exploranium if this option is of interest Exploranium GR 130 Users Manual page 8 3 0 QUICK START 3 1 3 2 3 3 This section offers a simplified guide to system operation A more complete description is available in Section 4 LOAD BATTERIES To load batteries open the battery door at the rear of the instrument by applying a turn to the door handle and remove the battery door Insert two D cell batteries alkaline or NiCad with the to the small brass ring and the to the spring The fabric strip should be behind the batteries Ensure that both batteries are firmly seated then re attach the door BUTTON OPERATION The joystick button mounted on the handle is the only control on the instrument Basic button actions are as follows CLICK UP DO
34. OVF will appear on the display The chart recorder will not show any data exceeding the selected scale however the correct countrate will be displayed numerically Due to the properties of the Sodium Iodide Nal detector and the signal processing hardware within the GR 130 the saturation point of the survey meter occurs when the scintillometer count exceeds 65535 counts per second If the radiation level exceeds this value the screen will continue to display gt 65535cps however this data is not valid as this value will remain constant even though the radiation field may be increasing Note that a display of 65535cps indicates that the GR 130 is in a very high radiation field and the user is advised not to remain in this area without protective equipment A full description of SURVEY parameter selection is covered in Section 4 9 1 Exploranium GR 130 Users Manual page 14 MAGNETIC INTERFERENCE In common with all other high sensitivity instruments the GR 130 uses a high sensitivity Photo Multiplier Tube PMT This device is used to amplify the signals from the detector to the processing electronics This device is interfered with if the local Magnetic filed is very high due to the presence of a very powerful magnet or electro magnet This super strong magnet field if large enough will collapse the PMT signal resulting in serious signal loss Users are warned to be aware of this affect SURVEY MODE DATA RECORDING The data dis
35. Once in this mode follow the displayed directions At each CLICK DOWN the display shows LOAD LOAD After the third click a fF Figure 34 appears DEFAULTS HAVE BEEN LOADED USER MUST RESET PARAMETERS TO SUIT THE APPLICATION LONG PRESS DOWN TO CONTINUE Figure 34 This display shows that the factory DEFAULTS have been loaded The user should note that this procedure ERASES SYSTEM and DATA MEMORY and any special parameter settings will have to be re selected as specified on the display All stored data is erased Exploranium GR 130 Users Manual page 40 5 0 SPECIFICATIONS 5 1 DETECTOR AND ANALOG PROCESSOR Detector Sodium Iodide Thallium NaI TD 4 0 cu ins 65 cm volume detector 1 5 diam 2 2 long 38 mm dia x 57mm long with an integral bi alkali PMT Resolution Better than 9 0 FWHM for Cesium 137 at 662 keV Reference source External Cesium 137 9 KBq approx 0 25FCi Housing Internal thermal protection and shock mounting Shaping Semi Gaussian 2FS time constant Pole zero cancellation Internally adjustable Base line restorer Active Fine Gain Digitally controlled 50 in 256 steps 5 2 ANALOG TO DIGITAL CONVERTER Type Buffered high speed high linearity 8 FS Successive Approximation ADC of channels 256 channel Ch 1 2 Time of measurement Ch 3 255 Spectral data Ch 256 Upper level discriminator Total conversion time including memory cycle Consta
36. PC RESPONSE Click UPLOAD LIBRARY on the PC Various messages will be seen After a few seconds the GR 130 display will return to the MAIN MENU and the PC will display a data box saying Transfer OK Click OK on the PC to terminate the Library upload program Power the GR 130 to OFF and remove the cable to complete the process To ensure that the upload was successful Power the GR 130 ON Select MAINTENANCE Select LIBRARY Click LONG DOWN The display should show the name of the current library name e g USER Library and the list of the Library isotopes The new library is now installed in the GR 130 and it will stay permanently in the GR 130 s memory until A new library is installed DEFAULT parameters are loaded in which case the default library is loaded The RAM battery fails in which case an Error message is displayed on the GR 130 Also see Appendix E NUCLIDE LIBRARY for more information Exploranium GR 130 Users Manual page 56 3 8 Save Spectrum to Spreadsheet also Survey Dose These utilities permit the saving of the data with a selectable filename in a Spreadsheet format as a COMMA DELIMITED text file CSV file Users can then export and save these files then import them into a spreadsheet etc as required for specialized display processing requirements Once the Save specuumite sureadsheet button is clicked the user must select the directory to store the data in
37. RED so that 2 spectra can be directly compared Clicking the BACKGROUND box from OFF to ON at the top right will bring the selected BACKGROUND spectrum onto the display in BLACK thus 3 spectra can be compared at the same time The upper right of the display shows the different color of the spectra in a data box Clicking on the BLUE RED or BLACK lines with the mouse gives the user a large selection of display enhancements to help assess the data Cursor irc to enable some of the cursor capabilities Position the cursor anywhere in the spectral box area and Right Click Select SHOW Select Cursor Display A special series of boxes will appear on the upper right of the screen as shown in Fig B3 Left click on box E to make the cursor system alive Left click on box F and select Cursor Style Point Style and Color as reqd A B C D E F G A lt gt ps Y es JC y Figure B3 Cursor Icons Left click on box G and select Snap to Point and left click on this to lock the cursor to the graph Move the mouse until the cursor intersects either the vertical or horizontal black cursor line appears Then hold the left mouse button down and drag the cursor The cursor will now follow the spectrum and display the X axis Energy in box C and the Y axis Counts in box D The cursor arrows in box A can also be used to increment the cursor The user can experiment with these options to s
38. RLOAD occurs at a different Dose level depending on the isotope Overload is approximately 2mR h for Am 241 and 6 5mR h for Cesium 137 GR 130 UNITS WITH OPTIONAL GM TUBE once the Nal detector is overloaded the optional GM tube data is automatically used for DOSE measurements instead In this case the Overload condition of the Sodium Iodide detector is unimportant for Total Dose computations as the G M data is used at this point to compute Dose to retain accuracy See 4 7 2 for more details of the GM operation High Dose Data using the optional G M tube For units fitted with the optional G M tube the upper limit of Dose can be extended to higher Dose levels In the original GR 130 system a high range GM tube was used that extended Dose 99 56 MEAS measurements to 10R h However this tube gave less accuracy in G M 18 6 uR h the lower Dose regions To most users of the high sensitivity GR 130 system the higher Dose levels are less important but data accuracy is important For this reason all current GR 130 units are equipped with a different GM tube that offers a better range of performance The different GM tubes are noted on the instrument TETAS TRON Q227 base using coding as follows 14 3 mR GM marking only type A tube GM and A marking type A tube Figure 11 GM and B marking type B tube Type A this gives a Dose range from 1uR h to 10R h 10nSv h to 100mSv h Type B this gives a
39. THE USER IF STABILIZATION IS RECOMMENDED STARTING ANALYSIS The average user should observe some simple operating PS a procedures to get best results from the instrument Exploranium 116 MEAS recommends the following procedure SEARCH for the source in the SURVEY mode as this has maximum sensitivity If a source of radiation is found then use the SURVEY mode to estimate its approx geographic boundaries by observing the count rate or audio Position the detector facing the approximate center of the area of radiation Move the unit away or toward the source until the counts in the SURVEY mode are approximately 1000 cps Figure 10 Highlight ANALYSIS in the Main Menu and use a LONG DOWN to select The GR 130 immediately begins to acquire a spectrum with the display appearing as shown in Figure 10 a Battery status icon 13 01 Current time from the internal clock 116 Number of spectra already stored in memory not including the one currently being collected If the current spectrum is stored in memory when accumulation is complete it would be stored as Spectrum 117 MEAS Label to show that accumulation is in progress Exploranium GR 130 Users Manual page 18 Data box DT VS CA Below the header information a rectangular section of the display will show the accumulating gamma ray spectrum in graphical form System Dead Time This number shows how busy the internal gam
40. TING ANALYSIS ia AA AA sudan 17 4 6 2 AUTO POWER O Esa A A ad RS 19 4 6 3 DATA OVERFLOW tala o IIA 19 4 6 4 ANALYSIS DISDIAY cuasi ia alo dd RO an 19 4 7 DOSE METER a oia 23 4 7 1 BASIC OPERA ION ar aa aa tah consid ess aa a a aa 23 4 7 2 High Dose Data using the optional G M tube ooccoooocccccnnnnccnnnnnnnnnnnnnnnos 24 4 7 3 DOSE MODE RECORDING DATA Grasa asi ida 25 4 7 4 DOSES RANGE aa da 26 4 7 5 DOSE CORRECTION asocian iaa 26 4 7 6 CALIBRATION and DOSE UN Si renskctitaweh o ia 26 Exploranium GR 130 Users Manual page 3 4 8 DATA MEMORY ssaica a raid 27 4 8 1 STATUS tandil 28 4 8 2 DOM Prairie a a a E a aAa a Kaaa eNEAN 29 4 8 3 ERASE A E cdta dt pivtbonkenseuge tii 29 4 8 4 SPEC SCAN section A NE Mite OOOO 29 4 9 SE UP A NS 30 4 9 1 SURVEY aria A E 31 4 9 2 ANA Sia aio ads 32 4 9 3 ROT a ad 36 4 9 4 DOSE METER anios deco 36 4 9 5 CAE UO GI A E E E A E 38 4 9 6 DATTER Corra a ca 38 ALO MAINTENANCE Extraido 38 AOL EIBRARY dead 38 4 10 2 NiCd COND Nickel Cadmium CONDITIONING 0onncnnncnnnnonincnnncnnnnananannnannnnn 39 410 3 REMOTE ura AA eaten 39 FLOW DER AUIS series etesmeeavaneteen tenia qe paiwtinscaiimnedvouawonilCaiubbkiamnn tiga titenee use waNit tints 39 5 0 SPECIFICATIONS cccccccseccssseccscesccsercccsecenscensccnsecoucecnceseconsecnscessccusecouacescuesesenseesnaesoces 40 5 1 DETECTOR AND ANALOG PROCESSOR cuicos an 40 5 2 ANALOG TO DIGITAL CONVERTER wisissitssitedsis
41. WN a SHORT up to 0 4 sec push CLICK of the button UP toward the OFF position or DOWN toward the ON position is used to scroll through the system menus LONG DOWN holding the button DOWN toward the ON position for about one second from here on denoted LONG DOWN is used to activate the selection highlighted on the display CLICK LEFT RIGHT used in some menus to change parameters and in the selection menus to change screen contrast If the button is held to the left or right the Auto Repeat feature is enabled which allows the user to scroll through the available settings within a setup item POWER ON a short CLICK DOWN switches the unit ON Note a VERY LONG DOWN 3 seconds at power ON will switch on the display backlighting See Section 4 1 4 for information on backlighting After 2 5 minutes of NO activity in any selection menu the system will automatically power OFF to conserve battery life This auto power off is disabled in the data collection modes of operation Note that this auto off feature is disabled in most of the Maintenance menus and Remote RS 232 connection to eliminate the disruption of system operation 3 4 CONTRAST In the various menu displays CLICK LEFT RIGHT changes the display contrast Clicking LEFT changes contrast to lighter Clicking RIGHT changes contrast to darker When extremes are reached an audio double beep is heard to advise the user that they are at the limit of adjustment NOTE Th
42. age 0 3MeV range Energy keV P A P B C 0 1 5Mev range Energy keV P 2 A P 2 B C The above data are typical data each GR 130 is individually calibrated and actual results are stored in the instrument These coefficients are read by the associated SpecView program to keep all scales correct Exploranium GR 130 Users Manual page 21 4 6 4 4 PEAK ANALYSIS Selecting the PEAK ANALYSIS mode results in an automatic analysis of the last recorded spectrum to identify peaks The results are displayed in ascending order sorted by energy level A sample display is shown in Figure 15 PPkeV Peak position in keV FWHM Full Width Half Maximum The computed FWHM of the ME E located peaks gives an idea of the quality of the peak To avoid incorrect results any computed peak with a Resolution above or below a certain level is suppressed from PpkeV FWHM AREA any analysis see section 4 6 4 5 b Thus sometimes the 665 74 2662 user may see a peak on the spectrum that PEAK ANALYSIS 913 59 3324 does not find AREA The net Area of the peak in counts sample period This value is a measure of the relative intensity of each of the peaks In high background areas the actual peak may be Figure 15 displayed on the Compton slope The displayed number for AREA draws a straight line across this slope to give a true picture of the actual peak count rate more The word more is d
43. aging O NO 1 YES 50 unsigned char daver_time average with 3 5 or 10 pts 51 52 unsigned int dalarm dose rate alarm level 53 56 float dos_constant exposure rate constant 57 char dos_correct dose rate correction factor 58 61 float gmxcal 0 G M calibration offset 62 65 float gmxcal 1 G M calibration linear 66 69 float gmxcal 2 G M calibration quad 70 73 float gmxcal 3 G M calibration cubic 74 unsigned char batype battery type Exploranium GR 130 Users Manual page 59 C 6 NUCLIDE LIBRARY Byte data type name comments 1 16 unsigned char lib_name library name 17 unsigned char delimiter must be NULL 18 unsigned char noexp of lines reqd for Nuclide Ident 19 unsigned char noline of primary lines for isotope ident in library 20 21 signed int line_1 energy of line in keV 22 23 signed int line_2 energy of line in keV 24 25 signed int line_3 energy of line in keV 26 27 signed int line_4 energy of line in keV 28 29 signed int line_5 energy of line in keV 30 36 unsigned char name nuclide name in ASCII 37 unsigned char delimiter must be NULL 17 20 n 1 1 unsigned char noline number of lines of nuclide in library max 5 17 20 n 1 40 unsigned char delimiter must be 0 17 20 n 1 41 unsigned char stop must be 255 integer values stored MSB first then LSB Exploranium GR 130 Users Manual page 60 APPENDIX D NiCd BATTERY CHARGER INSTRUCTION MANUAL NOTE The Battery Charger Provided With The GR 130 Is For Us
44. and Manual Rev 15 Software supports 2 separate Calibration Constants one for Nal and one for GM to improve Calibration accuracy DOSE now has separate calibration curves for Gy R and Sv to improve calibration accuracy and permit calibration for Air Absorbed Dose H 10 for Sv to be implemented Also Dose accuracy below 100keV improved for better calibration accuracy see section 4 9 4 2 Co 57 peak analysis improved New manual Rev 15 and new SpecView 3 1 SpecView has been updated with the latest NUCLIDE DEF file The manual has been updated to include all system changes Comment added re Magnetic Interference Section 4 4 130M software upgraded to 5V15 level 130G software upgraded to 5V15 level and Calibration capability for Dose measurements for BGO detectors or Nal incorporated Special software version for Aloka released Exploranium GR 130 Users Manual page 70 GR 130 MiniSPEC INDEX PLAIN aie cado ooo 13 32 38 41 ES tts n deat iia Aa iE 9 17 23 30 32 34 A a a a a a 10 14 31 32 35 38 Auto Power off ssssesssssssenrnernnnnnnenrerrnernne 19 39 Batte fy scnustoecscsacaaujececevereeveuwmlbeuoantenadcmnscey 6 10 12 38 39 Clock Real Time nunca 38 42 Cock PRIME eat 19 41 CON Tasa 12 CU tb 18 20 22 33 Data Record iia 13 14 26 35 Data FORMA iu aia 57 Displayen n aa i n 6 8 43 DOS Al 5 9 23 28 36 38 Dose UNItS ai a 26 27 Download data viraje ena 49 EPROM chandal nissan 66 67 Error COG
45. and a file name NOTE filename must be csv When Save is clicked the data I saved A typical example is shown below 1 01 07 07 10 51 57 cpm Live time s 2 00 2 01 07 07 10 52 07 cpm Live time s 3 00 0 0 0 0 0 0 0 0 60 60 180 420 240 1680 450 1360 This shows a 2 spectra file Ch 0 spec date time cpm basic info from the spectrum header Time Date and Live Time of the data Ch 1 spec channel 1 s be 0 Ch 2 Spec channel 2 first data point Etc the example only shows ch 1 8 Ch 254 spec channel 254 Ch 255 Cosmic count sample period ALL DATA ARE LIVE TIME CORRECTED and NORMALIZED to Counts minute Exploranium GR 130 Users Manual page 57 APPENDIX C DATA FORMAT C 1 HEADER 47 bytes Byte data type name comments 1 4 unsigned char synchro ZZZZ synchro frame 5 6 unsigned integer length total length of the record 7 unsigned char rectype type of record A spectrum D Dose S SURVEY 8 unsigned char year year in BCD 9 unsigned char month month in BCD 10 unsigned char day day in BCD 11 unsigned char hour hour in BCD 12 unsigned char minute minute in BCD 13 unsigned char second second in BCD 14 unsigned char volt battery volt 10 in BCD 15 16 unsigned int clock_time total clock time sec 17 unsigned char Cgain coarse gain 0 1 5MeV 1 3 0MeV 18 unsigned char Fgain fine gain 0 255 19 20 unsigned int Peak stab peak position in channels 10 21 22 unsigned int FW stab peak resolution
46. and edge of the display this display box shows the center filled in to indicate that the display is now covering the middle 128 channels Channel 65 192 If the cursor is again shifted beyond the right margin of the screen the rectangle will show the right half filled in to indicate that the upper 128 channels are displayed Channel 129 256 Y E CU a Channels 1 128 b Channels 65 192 c Channels 129 256 on display on display on display Figure 30 128 Channel Visual Indicator 256 Channel If this selection is made the displays shows the data from all 256 channels on the 128 point display by averaging adjacent channels Thus the average of channel 1 and 2 is displayed as the first pixel column and the average of channel 255 and 256 is shown on the 128th pixel column on the display Although the display is visually averaged so the user can see the full spectrum ina single display moving the cursor will still show the channel individual data Thus if the button is clicked left or right one click at a time the cursor on the display will move once for every 2 clicks but the individual data for each channel can be read from the information displayed below the graphical display box as described in Section 4 6 1 4 9 2 2 MEAS TIME Selections are 10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 1200 1800 3600 5400 This is the preset Sample Time in seconds for accumulating a spectrum in the Analysis mode T
47. ange also implemented to correct GM performance problems NOTE New software release 5V02 requires these mods to be installed for correct GM operation Non GM units can use the new software without any GM changes GM overload display implemented at 2mR h level 20uSv h STABILIZATION Timeout was 1 hour now changed to 4 hours many users complained of unnecessary repeat stabilization see Section 4 5 2 STABILIZATION parameters optimized see Section 4 5 3 results in faster stabilization times STABILIZATION display display simplified see section 4 5 3 Exploranium GR 130 Users Manual page 69 9 Z 5 Z 6 CONTRAST adjustment originally the Contrast of the display could be changed anytime by left right action of the joystick Many users complained of accidentally adjusting contrast while doing other things so this mode has been changed Now after power ON the user has 60 seconds to optimize the Contrast by left right action after this time adjustment is disabled See section 4 2 Release of 5V07 and Manual Rev 14 STABILIZATION DISPLAY changes was 199 198 197 now is 1 2 3 to make the display easier to read LANGUAGE SUPPORT software now available in French German and English manual only in English 130M Medical and 130G Geophysical units supported by Appendixes in the manual was loose sheets Implemented improved GM calibration for old GM tubes Release of 5V15
48. dicates that a G M tube is installed STABILIZATION GENERAL When any spectrometer is turned ON the internal electronic components exhibit some level of warmup drift with time which may be exacerbated by changes in the ambient temperature Sodium Iodide crystals typically exhibit a 15 change over the 10 to 50 C temperature range If uncorrected this drift could seriously affect data analysis For this reason the GR 130 incorporates a procedure called STABILIZATION to remove these effects Stabilization automatically fine tunes the system to adjust the internal system gain and align the spectrometer correctly Stabilization typically takes a few seconds as described below In very stable temperature conditions stabilization need only be repeated once daily However in a typical field environment where temperature fluctuation is common more frequent adjustment is required Stabilization is essential prior to using the Analysis or Dose Meter modes as inaccurate data may result without spectrum correction The stabilization process has an automatic timer that advises users when re stabilization is required In Survey mode stabilization is not essential as the data shown is relative not absolute STABILIZATION TIMEOUT To advise the user when system Stabilization is required a warning message is displayed when the elapsed time from the last Poe os stabilization exceeds 60 minutes The stabilization warning screen is shown in Fi
49. e amplitude relative intensity of the peak A straight line fit is used at the base of the peak to eliminate background effects and give a more correct idea of relative intensity this means that a peak listed in the library has NOT been identified by the peak analysis process See Appendix E for more information regarding Nuclide Identification Libraries b DEFAULT IDENTIFICATION LIBRARY A list of the nuclides currently in the DEFAULT identification library is given below Isotope Name 1 Am 241 Americium 2 Cs 137 Cesium 3 Co 60 Cobalt 4 Co 57 Cobalt 5 K 40 Potassium 6 Ir 192 Iridium 7 Ra 226 Radium 8 Th 232 Thorium GR 130M default library is different see Apepndoix F 2 c The GR 130 will display the nuclides identified when the peaks defined in the library match the found peaks within certain specified limits In the event that a spectrum is analyzed and peaks are found that do not match any defined library peak a label N I is used to identify these peaks If NO peaks are found the message NO NUCLIDES HAVE BEEN FOUND will be shown when nuclide identification is performed c NOTES c 1 The GR 130 internal library can be modified using the SpecView program see Appendix B and E for more information c 2 After NUCLIDE IDENT the user may go back to the SEE SPECTRUM function Now if the cursor is positioned at the top of a particular peak the name of the isotope will be shown at the top of t
50. e With NiCd D Cell Batteries ONLY Operating The Charger While Alkaline Batteries Are In Use May Cause Battery Leakage And May Seriously Damage The GR 130 Exploranium Is Not Responsible For Any Damage Caused By Improper Battery Charger Operation D1 Description The battery charger is designed to charge the two D cell NiCd batteries in the GR 130 Hand Held MiniSPECtrometer without removing them from the instrument The charging current is set to 500 mA Approximately 8 to 10 hours of charging is required to charge a fully discharged set of batteries When the batteries are charged to approximately 90 of their capacity the current is decreased to 100 mA D2 Operation To obtain the best operation from your NiCd batteries it is recommended that the battery be used until it is close to its fully discharged state This will prevent memory effect which occurs when NiCd batteries are repeatedly charged when they have been only partially discharged Long time storage is recommended in the discharged state at a temperature of 5 to 25 C and low humidity Charging Procedure 1 Turn the GR 130 OFF and open the battery door 2 Connect the charger connector to the GR 130 lower port marked 3VDC Connect the AC adapter to an AC power outlet power cable is about 1 m 3 3 feet long 3 The green LED should be on to indicate that there is a power connection The yellow LED indicates that the GR 130 is charging A red LED indicates t
51. e correction is important The standard way of dealing with Dead Time is to normalize the data to compensate for this sampling Dead Time by using the actual system LIVE TIME where LT Live Time ST Sample Time DT Dead Time Exploranium GR 130 Users Manual page 34 The system LIVE TIME is automatically accumulated by the GR 130 and stored as a data variable that is output on the data stream to permit data correction on external processing systems The displayed DEAD TIME is computed at a 1 sec rate for display purposes only by the simple formula DT ST LT ST 100 For example if a 100 second sample had a Live Time of 91 373 secs then ST SAMPLE TIME 100 000 sec LT LIVE TIME 91 373 sec Therefore DT 8 6 from the above formula The DEAD TIME is only computed for display purposes to advise the user in the ANALYSIS mode of the approximate intensity As mentioned previously for best data analysis Dead Time below 20 are advised as above this level the local radiation field is so intense that scattering may cause data analysis problems Since the radiation falls off as the inverse square moving a few feet away from a hot source will reduce the DT thus giving better data analysis AND reducing the users exposure To give an idea of Dead Time 10 Dead Time a DOSE Rate for Cs 137 of approx 0 5mR h a countrate of approx 5000cps in the SURVEY mode The LIVE TIME data is what is important and it is used
52. e is sized to fit exactly in the hole at the end of the boot thus placing the source at the correct location for system stabilization VINYL CARRYING CASE The system is supplied with a soft vinyl carrying case with shoulder strap for easy transportation of the GR 130 An easy open zipper flap allows access to the instrument while providing additional weather protection The carry case also has an external pocket for carrying note books etc MANUAL This user manual is supplied with the instrument SHIPPING STORAGE CASE The GR 130 system is shipped to the customer in a rugged black polyurethane carrying case that is fully waterproof and highly shock resistant This case is intended for shipping and or storage purposes It is equipped with a pressure purge valve and is capable of withstanding air cargo shipping abuse while offering a high level of protection to the instrument On site most users carry the GR 130 in the vinyl carry case leaving the storage case back at the office However if the unit is to be transported under conditions where it could be bumped or dropped the shipping case is recommended and would prevent other luggage from damaging the instrument Even if the user does not intend to use the polyurethane storage case it should be kept in storage as Exploranium will only honor the full instrument warranty if the GR 130 is returned in this or a similar case HIGH DYNAMIC RANGE G M TUBE The GR 130 is equipped with a G
53. e mode was enabled 14 3 Total radiation accumulated from the time the dose meter was enabled in this case since 9 27 in the selected units ACCUMULATED DOSE The Dose Rate and Total Dose are updated based on the Sample Time selected in the SETUP menu The default value is 1 second SETUP can also be used to select an AVERAGE data display see 4 9 4 3 NOTE Unlike other Dose measuring instruments the Sodium iodide detector gives highly accurate Dose levels that are essentially flat across the entire Energy spectrum Calibration data shows less than 10 error across the entire spectrum 4 7 1 1 OVERLOAD a b 4 7 2 SODIUM IODIDE DETECTOR ONLY due to the nature of the Sodium Iodide Nal detector and the signal processing hardware within the GR 130 the system will overload if the Dead Time exceeds 70 At this high Dead Time the unit is no longer capable of accurately calculating Dose Rate and the warning OVERLOAD will be displayed This warning message is an indication that the GR 130 is in a high radiation field It is not recommended that the user remain in this area without protective equipment Once the Dose Rate goes into Overload the TOTAL DOSE accuracy is affected For safety reasons and as a warning that this has occurred the label OVLD is inserted above the TOTAL DOSE units and stays in place until the Dose mode is terminated This serves as a warning to the user that the Total Dose may be inaccurate NOTE OVE
54. e wrong battery type is selected will not harm the GR 130 but will result in an erroneous reading from the battery indicator and may limit the usable battery life USERS ARE REMINDED THAT IF ALKALINE BATTERIES ARE USED DO NOT ATTEMPT TO USE THE BATTERY CHARGER OR SERIOUS DAMAGE CAN RESULT MAIN MENU Exits back to the MAIN MENU 4 10 MAINTENANCE This sub menu See Figure 32 is used to select certain special tasks LONG DOWN will show the current library in use and will list all the isotopes in the library see section 4 6 4 5 b for reguklar 130 and Appendix F 2 c for the GR 130M LIBRARY NICD CONDITION REMOTE DEFAULT MAIN MENU A new library can be installed in the GR 130 See Appendix B and E Figure 32 Exploranium GR 130 Users Manual page 39 4 10 2 NiCd COND Nickel Cadmium CONDITIONING This feature is only enabled if NiCd batteries are selected in the SETUP menu If selected the display shows NiCd DISCHARGING 2 4V Nickel Cadmium batteries have the disadvantage in that they can develop a Memory Effect If the battery is repeatedly only partially discharged and then recharged again on a regular basis eventually the battery capacity is reduced and will not charge fully To overcome this effect and re establish the battery capacity the NiCd COND procedure gradually discharges the batteries to the 2 0 V lower operating point and automatically switches the unit OFF The user should activate this
55. ection is made in this menu by highlighting the appropriate menu item by a short CLICK UP or CLICK DOWN and LONG DOWN to select A parameter value is changed by CLICK LEFT or CLICK RIGHT SPEC SCAN START MEAS SEE SPECTRUM PEAK ANALYSIS NUCLIDE IDENT MAIN MENU Figure 26 SURVEY ANALYSIS ROI S DOSE METER CAL CLOCK BATTERY MAIN MENU Figure 27 Exploranium GR 130 Users Manual page 31 4 9 1 SURVEY Selecting SURVEY from the SETUP menu allows the user to set the SET UP 1 ES parameters for the SURVEY mode see Fig 28 OUTPUT TO OFF SAMPLE TIME 10s CHART RANGE 100 AUDIO METER OFF ALARM LEVEL 2000 Figure 28 4 9 1 1 OUTPUT TO Options are OFF PC or MEM OFF the SURVEY data is displayed on the screen but is not recorded into memory this is the default operating mode MEM the SURVEY data is to be stored in the GR 130 internal memory PC the SURVEY data is to be output in real time to an external PC via the RS 232 output port For further information on data format see Appendix C See Section 4 4 1 for information on using SpecView 4 9 1 2 SAMPLE TIME The SAMPLE TIME indicates the interval at which survey samples are taken Selections are 1 2 3 4 5 6 7 8 9 10 20 30 40 50 or 60 seconds Under most conditions a 5 second sample gives reasonable accuracy however a 1 second selection is advisable if the unit is being used in a continuous search mode and numeric data is required
56. ed into the appropriate connector at the rear of the instrument exposed when the battery door is removed For more information on battery charging see the Battery Charger Instruction Manual in Appendix D Exploranium GR 130 Users Manual page 7 j k m n o NOTE p q RS 232 OUTPUT An RS 232 port is provided at the rear of the unit behind the battery door marked COM The GR 130 is supplied with a customized cable that permits direct connection of this port to a PC This port can be used to download data memory from the GR 130 as well as providing complete REMOTE control for special applications Special user libraries can be uploaded into the GR 130 memory as well SYSTEM SUPPORT SOFTWARE Support software is provided with the GR 130 on the disks labeled SpecView This is a Windows based program and operates under Windows 95 or 98 The program is described in Appendix B and provides data downloading data display custom library uploading and some processing as well as ASCII downloading to produce the data in a format suitable for importing into various Spreadsheet programs TEST SOURCE The GR 130 is supplied with a 0 25 Ci Cesium 137 source does not require licensing to stabilize the GR 130 for Analysis and Dose Meter modes To prevent accidental loss of this small source and to ensure correct placement the test source is supplied in a cylindrical tube 1 long x 1 25 diam 25mm L x 30mm D The sourc
57. elect the ones best suited to their application Exploranium GR 130 Users Manual page 53 3 5 View Survey Data Chart 3 6 This selection shows a similar display to the Spectral data with the buttons selecting the separate data files The Header data at upper left permits the user to be sure they are using the right data set AVERAGE The AVERAGE button if Be Est Gree ow Heb clicked permits a selectable of data io points to be averaged to suppress statistical noise Note that if selected the actual data is displayed in a suppressed dida eee eae gray color leaving the filtered data clearly 2 Ga EES es visible al FILTERING The UP DOWN arrows set whe ji the average period from 1 n data points AUR ah Since this is a moving average the spatial w wN il h resolution is unchanged but amplitudes are aj i suppressed by the filtering process This is E E E clearly visible on the display X axis The selection box at the bottom right is selectable between seconds and Time seconds The X axis is shown in seconds mode which is the sample rate Time Shows the data in absolute Time units showing the Time that the data was collected Y axis Is in counts second and Vertical scaling is available from the UP DOWN buttons or manual scaling View Dose Data Chart Essentially the same as the Survey data display but using Dose data The Y Vertical scale is in selected units A mes ees which are d
58. endent as the calibration of the unit corrects for energy dependence effects Exploranium GR 130 Users Manual page 66 APPENDIX H EPROM REPLACEMENT PROCEDURE Caution EPROM replacement should be carried out on the bench and in a static free environment to avoid damage to electronics from static electricity PROCEDURE Carefully read the following and refer to the drawings on the next page before starting Disconnect battery charger cable and computer cable if plugged in Remove battery door and remove batteries from the unit Remove yellow boot from the unit Keeping unit vertical standing unit on the battery compartment side undo the four screws from the back of the unit Holding at the top edge of the black face plate and without pulling gently open unseat the top face plate black from the body of the unit Put unit flat on the back of the body NOTE The 2 connectors battery and RS232 that protrude through the outer metal case at the rear of the unit behind the battery door are what inhibits easy removal of the inner electronics assembly so in the following procedures the user should be aware that these must become free before the main electronics assembly can be removed Hold the case of the unit firmly with one hand then keeping the front black edge tilted slightly upwards hold the handle and push the body of the unit forward and up and away from the base ensuring that the connectors noted above are clea
59. ends on the spectral range 0 1 5 MeV or 0 3 0 MeV set in the SETUP ANALYSIS menu Section 4 9 2 4 above The display shows one of the following screens ROT s in RANGE 0 3 0MeV ROT s INRANGE 0 1 5MeV 1 FROM ch 50 60 1 FROM ch 100 120 2 FROM ch 89 100 2 FROM ch 178 200 3 FROM ch 102 113 3 FROM ch 204 226 This sets the ROTI s for ROI 1 Cesium 137 peak 662 keV ROI 2 Cobalt 60 peak 1173 keV ROI 3 Cobalt 60 peak 1332 keV DOSE METER This menu shown in Figure 31 sets the parameters for the DOSE A E meter mode 4 9 4 1 OUTPUT TO Options are OFF PC and MEM OUTPUT TO MEAS UNIT AVERAGE SAMPLE TIME CORRECTION ALARM LEVEL OFF In this mode no data storage is enabled PC In this mode DOSE data at the selected sample rate is output to an external PC NOTE that it is the users responsibility to arrange the correct PC connection Figure 31 The data output currently has no hand shake capability and contains no buffer capacity Therefore if the PC is not ready to receive data from the GR 130 the data will be lost See Appendix B for software support information MEM In this mode DOSE data at the selected sample rate is stored repetitively into data memory Exploranium GR 130 Users Manual page 37 4 9 4 2 MEAS UNIT This parameter selects the DOSE meter units as R Roentgen Sv Sievert or Gy Grays Once this primary selection has been made the GR 130 will disp
60. from any menu or option screen The software allows for any length of CLICK DOWN either a short normal or long press down to successfully dump all data stored in memory from the GR 130 to the user s PC in SpecView 2 1 From Section 4 9 1 4 Audio Meter AUTO is replaced with ON when operating the GR 130 Changes from Manual Revision 10 1 to Manual Revision 11 Nuclide library updated in SpecView SpecView updated to Release 1 37 Changes from Manual Revision 11 to Manual Revision 12 Section 3 7 note added re Customizing Libraries 4 6 4 3 1 note added re Calibration coefficients Section 4 6 4 5 b library simplified Section 4 7 2 note added re low energy isotope Dose problems on the G M tube SpecView version changed to 2 2 Notes added re Nuclide Library in Section 3 7 Section 4 7 2 5 3 4 corrected Dose ranges to match rest of manual max 10R h Corrected graphics error on Fig 14 was showing DT instead of EN Release of 5V02 software and Manual Revision 13 GR 130M addendum now included in the manual as Appendix F GR 130G addendum now included in the manual as Appendix G Section 1 1 1 2 added to the manual to advise users of the various GR 130 models and their differences New GM calibration implemented 2 versions of GM tube supported original unit designated Type A and new unit designated Model B The GM tube has also been relocated to improve energy performance Hardware ch
61. g 11 The spectrum accumulation is terminated to ensure that the full spectral shape is correct to permit Nuclide Identification The e f TERMINATED system actually looks ahead assuming the current count rate will BECAUSE OF stay approximately stable to predict the point that overflow will occur OVERFLOW and ensure that the analysis period is terminated before spectral shape is compromised Figure 11 4 6 4 ANALYSIS 1 Display This screen Figure 12 offers the user a variety of data processing options to analyze accumulated data in memory and to display the E EE results in various forms STORE SPECTRUM Note that the GR 130 learns from the users previous actions and START MEAS automatically selects the most probable requirement As an SEE SPECTRUM example if the user selects START MEAS and at the end of the DE Ee sample selects NUCLIDE IDENT from the ANALYSIS 1 Menu OUTPUT SPECTRUM shown in Figure 12 then the next time a reading is taken the MAIN MENU display selection will automatically highlight the NUCLIDE IDENT selection as it is most probable that the same sequence is being repeated Figure 12 4 6 4 1 STORE SPECTRUM This option stores the current most recently measured spectrum in the memory of the GR 130 assigns it a unique Sample Number and tags it with the date and time of measurement for easy RANADCI onl identification All data recorded in memory can be downloaded to an external computer
62. gure 6 This message is displayed only if Analysis or STAB TIMEOUT Dose Meter mode is selected Pressing the button UP will exceeded automatically move to the stabilization selection in the Main Menu STABILIZATION The stabilization timeout may be ignored by LONG DOWN at this recommended screen However this is not recommended and erroneous data may result Users are STRONGLY advised to carry out stabilization LONG PRESS DOWN before continuing This warning message can be ignored see TO CONTINUE comments below but it will be repeated each time either Analysis or OR UP TO EXIT Dose meter mode is selected to remind the user that erroneous data may result if stabilization is not carried out Figure 6 Exploranium GR 130 Users Manual page 16 4 5 3 STABILIZATION PROCEDURE The GR 130 is supplied with a low activity 0 25uCi Cesium 137 radioactive source This source meets proposed Canadian and pl already implemented European regulations for sources that do not require a license The European limit is 0 3uCi On request a 1 0 PUT Cs SOURCE or 2uCi source can be provided to USA where the regulatory limit is TO THE HEAD 9 9uCi The only advantage to the larger source is a reduction in OF THE GR 130 the time required to stabilize the GR 130 LONG PRESS DOWN To stabilize the GR 130 select STABILIZATION from the Main Menu TO CONTINUE and follow the displayed instructions shown in Figure 7 Insert the OR UP TO EXIT supplied Cesium Test Source
63. hat the charger is hooked up incorrectly 4 Once the green and yellow LED s only are lit leave the GR 130 in a dry place for 8 to 10 hours Charging is complete when the yellow LED goes OFF or flashes 5 Disconnect the battery charger from the GR 130 and AC outlet Replace the battery door on the GR 130 Operate the GR 130 as usual NOTES a When the batteries approach the fully charged state the charger switches to the trickle charge mode lower charging current and therefore there is no need to watch for the end of charging The unit can be left on trickle charge indefinitely b The capacity of new NiCd batteries is approximately 80 of nominal capacity Nominal capacity is reached after 3 to 4 chargings The lifetime of NiCd batteries is approximately 300 charging discharging cycles C Please note that NiCd cells self discharge at approximately 1 of capacity per day The NiCd batteries in a GR 130 kept in storage for about 3 months will be fully discharged Exploranium GR 130 Users Manual page 61 D3 LED Status Summary YELLOW CHARGER ACTION el STATUS OFF Charging o None a pa FLASHING charger or continue may be defective 6 8 A ceca ai position cable D4 Technical Specifications Input power requirement 110 VAC 50 60 Hz 230 VAC optional max 4 VA Operating temperature range 0 40 C Charging current 500 mA Trickle current 100 mA Change to trickle charging voltage 3 0 V
64. he display Any peak that cannot be identified from the nuclide library will show N I Not Identified Exploranium GR 130 Users Manual page 23 c 3 Sodium lodide crystals have an inherent resolution limitation Therefore a range of energy levels on either side of the peak must be accepted during peak analysis The range of acceptable energy levels for Nuclide Identification is given below lt 100 keV 15 of Peak 100 300 keV 4 of Peak 300 3000 keV 3 of Peak c 4 Ifthe user is unsure of what isotopes are in the library see Section 4 10 1 c 5 The NUCLIDE IDENTIFICATION process is actually a 3 stage process PEAK analysis is carried out on the spectrum to identify all peaks present All peaks with FWHM above and below certain limits are cancelled as probably doublets triplets etc FWHM imposed limits are BELOW 90keV no limits ABOVE 90keV 25 The remaining peaks are compared to the library for isotope identification 4 6 OUTPUT SPECTRUM Activating the OUTPUT SPECTRUM function permits the transfer of spectral data to PC via the data transfer cable provided with the unit The SpecView software program is used It is critical that the GR 130 be turned OFF before connecting the unit to the data transfer cable If the unit remains ON any shock or power surge arising from the connection may corrupt data in memory See Appendix B for further details MAIN MENU Exits back to the Main Menu 4 7 DOSE METER It is
65. he selection of this parameter is very important because a short sampling time may yield unreliable data in areas where the radiation count rate is very low However a long sample time is often impractical As a general rule a short sample time 20 or 30 seconds is sufficient when the radiation level of a nuclide to be identified is high When analyzing a very weak source a sample time of several minutes may be desirable Typically 60 seconds is a reasonable compromise 4 9 2 3 MEAS MODE Selections are LIVE CLOCK GENERAL COMMENTS regarding LIVE TIME and DEAD TIME When the spectrometer is acquiring data each incoming signal pulse from the detector takes a finite time to process convert from an analog amplitude indicative of energy level to the corresponding channel number in the spectrum The time taken to process each pulse is referred to as DEAD TIME and is usually expressed as a of the available time As an example see DT in Figure 10 If the incoming count rate is very high then the Dead Time will be very high As an example if Dead Time 50 then for every second of sample time the system is only available for 50 of the time 0 5 seconds to process new pulses so any incoming pulses encountered during signal processing will be lost Thus when accumulating data the system is LIVE only for a fraction of the time At very low count rates the Dead Time is relatively insignificant However at higher rates Dead Tim
66. identified Any other identifiable isotopes would also be listed Figure 16 N I Any located peaks that cannot be correlated to a specific isotope in the library are shown as N I Not Identified The SUM of all the N I peaks are shown on the display as shown in Figure 16 Since this list is in amplitude order if the SUM of the N I peaks is LESS than the other identified isotopes it will appear last on the list Exploranium GR 130 Users Manual page 22 FURTHER ANALYSIS If the user uses the cursor to highlight one of these identified isotopes for example Cs 137 then a LONG DOWN will show Fig 17 If an isotope was identified that has 2 distinctive peaks such as Cobalt 60 then the SUM of the peak areas of the 2 peaks will be shown in the Figure 16 display However in the Figure 17 display the individual peak areas will be shown These data are interpreted as nee EEN Cs 137 The name of the identified isotope from the library 1 1 The library specified that only 1 peak was necessary for identification for isotope analysis to be correct Cs 137 1 1 662 7 3 25003 These peaks were identified in the Peak Analysis 30 3 1 6891 procedure 662 Energy level of the identified peak in keV dis Ae re Te 7 3 FWHM of this peak The Full Width Half Maximum of Figure 17 a peak gives an idea of the quality of the peak for analysis 25003 Counts time period in the peak area and gives some idea of th
67. ievetsaricedvestnaddanedsdenieesudasniateceieddasnatseniains 40 5 2 1 HIGH COUNT RATE SYSTEM PERFORMANCE sssssssssssssrnnnnnnnnnnnnnnnnnnnnnnnnnnnnrnnnns 40 5 3 DIGITAL PROCESSOR ita A Natera 41 5 3 2 SPECTRUM ANALYZER ANALYSIS MODE acota sido sidliia 41 5 3 3 DIGITAL SPECTRUM STABILIZER STABILIZATION MODE cccccccccccncncnnncnnnnnnnnnos 42 5 3 4 DOSEMETER csovioisia cion tc o 42 APPENDIX A ERROR and DISPLAY MESSAGES ommcccocooccconnnoonccnnconarcnnnn nan cnnn nana rrrnna nr rnnnaannos 45 APPENDIX B SpecView SOFTWARE 0 nee 48 APPENDIX C DATA FORMAT eee 57 APPENDIX D NiCd BATTERY CHARGER INSTRUCTION MANUAL sssssssssssssnnnnnnnnnnnnnnnnnnnnnnn 60 APPENDIX E NUCLIDE LIBRARIES cce eee 62 APPENDIX F GR 130M MEDICAL version details 0cseeeeee eee 63 APPENDIX G GR 130G GEOPHYSICAL version details 0seeeee 64 APPENDIX H EPROM REPLACEMENT PROCEDUREo ccoooccccooccoooocnncooronoarcnnnn cana r canon rnnnnannnnanos 66 APPENDIX Z CHANGES IN THIS MANUAL t tee 68 Exploranium GR 130 Users Manual page 4 EXPLORANIUM RADIATION DETECTION SYSTEMS GR 130 miniSPEC Surveying Gamma Ray Spectrometer Software Version 5V15 or higher 1 0 GENERAL SYSTEM DESCRIPTION The GR 130 miniSPEC represents a major breakthrough in the field of radiation monitoring offering the user not only the ability to search for and locate radioactive material but also to automatically ident
68. ify the radioactive nuclides present This capability in a fully portable hand held unit will permit its use in a wide variety of applications including 1 1 a b c d 1 2 Hazard identification and risk assessment Inspection of incoming and outgoing material for radioactive contamination Inspection of radioactive gauges for leaks Survey of waste sites for radioactive material Employee exposure rate and dose monitoring Radioactive source monitoring 7 Government inspection for material compliance Identification of unknown radioactive material Regulatory control of radioactive material Classification of radioactive material for a wide variety of users GR 130 DIFFERENT MODELS The GR 130 has evolved over time and some versions have slightly different hardware however the new release of software supports all versions GR 130 with no GM tube this unit is the standard unit and includes only a Sodium Iodide detector NaI offering SURVEY NUCLIDE IDENTIFICATION and DOSE measurements up to typically 2mR h 10uSv h GR 130 with GM tube all features the same as the Standard unit except the addition of a G M tube extends DOSE measurements to 1R h 1mSv h These units have GM on the serial number plate GR 130M see special Appendix F this is a special unit that offers Medical users special ranges for improved low energy performance and also a different library GR 130G Nal or BGO
69. ime and any Dead Time occurring must be corrected manually The data output includes the system Live Time so that correction is quite simple especially if using a spreadsheet program As an example the Exploranium SpecView program described in Appendix B provides the option to output the spectra to a spreadsheet In the process the data is automatically Live Time corrected and normalized to counts minute The CLOCK mode is used primarily when several analyses are being compared without time normalization and it is necessary to have the same sample time Exploranium GR 130 Users Manual page 35 NOTE USERS ARE REMINDED THAT IN THE LIVE MODE ACTUAL SAMPLE TIMES WILL BE MUCH SLOWER IN HIGH COUNT RATE AREAS IF ONLY NUCLIDE ID IS REQUIRED THEN USE OF CLOCK WILL ENSURE THAT THE PRESET SAMPLE TIME IS THE ACTUAL SAMPLE TIME 4 9 2 4 RANGE Selections are 1 5 3 0 MeV 750keV for GR 130M This selection sets the spectral range for data analysis Since most artificial isotopes such as Cesium Americium Iodine and Cobalt occur in the lower portion of the spectrum using the 1 5 MeV setting gives more accurate identification In this mode the primary isotopes NOT analyzed would be the upper peaks of RADIUM and THORIUM however there are enough lower peaks of Radium and Thorium to normally get a correct identification Note that at the 0 1 5 MeV range each channel represents approximately 6 keV At the 0 3 0 MeV range each channel
70. imperative that stabilization is carried out prior to using the dose meter mode otherwise data may be inaccurate A special stab timeout message Figure 6 alerts users if stabilization is recommended 4 7 1 BASIC OPERATION If the DOSE METER function is selected and the STAB TIMEOUT A ao 09 56 MEAS Nal 18 6 uR h warning does not appear the GR 130 begins recording radiation dose and Figure 18 appears In this mode the GR 130 computes displays data in terms of the Absolute Dose Rate displayed in one of three units R h Sv h or Gy h The desired units can be selected in the SETUP menu Additionally the display shows the Total Dose accumulated from the time the dose meter TOTAL FROM 09 27 was enabled 1 4 n 3 mR DOSE METER Shows the current mode 09 56 Shows the current time Figure 18 MEAS Shows that measurement is in progress Nal Shows that the Dose measurement is made with the Sodium Iodide detector Other displays are MEAS Nal normal operation at low Dose rates MEAS GM normal operation at High Dose rates when the Nal is saturated and the GM is providing all the Dose data Exploranium GR 130 Users Manual page 24 MEAS no GM when the Nal is saturated and the GM is supplying NO data either because it is in a low energy isotope field or even if the GM tube is defective 18 6 Current Dose Rate in uR h units You may also select Sv or Gy 09 27 The time that the Dos
71. in the Maintenance Menu that permits the user to load the original system default parameters This procedure is also used in the event that the system has data memory problems as the action also erases system RAM DEFAULT PARAMETERS HAVE BEEN LOADED USER MUST RESET PARAMETERS This indicates that Default parameters have been loaded and users are reminded that any special operating parameters previously set must be re selected as the system has replaced all parameters with the system default values STAB TIMEOUT exceeded STABILIZATION is recommended When Stabilization has been carried out a 60 minute timer starts If the user enters the ANALYSIS or DOSE METER modes more than 60 minutes after system Stabilization has been carried out this message will be displayed The user should carry out Stabilization to ensure that all dose and analysis data is valid WAIT FOR NEXT START at When data storage to memory is selected in the SETUP ANALYSIS mode the user must select the sample time interval The above message is displayed if the GR 130 is waiting for the sample time to elapse before the next sample begins Thus if a 1 minute sample is required every 5 minutes when the sample is complete the above message will be displayed in the 4 minute wait period until the next sample is scheduled to start LOW BATTERY Means that the system batteries need replacement or recharge Operation past this point is not recommended as the system will automatically s
72. ion time see below REP TIME If REP MEM mode is selected this new parameter appears This parameter sets the sample time Selections are 1 10 20 30 40 50 60 120 minutes The minimum selection depends on the selected MEAS TIME Exploranium GR 130 Users Manual page 36 4 9 4 For example if MEAS TIME 20 secs SAMPLING REP MEM REP TIME 1 min then a 20 second sample is taken and stored in memory and 40 seconds later 1 min 20 seconds a second sample is taken and stored in memory and the process is repeated until the memory is full or this mode is manually terminated REP PC This selection is similar to REP MEM except that the data is transferred directly to the RS 232 port and not to memory The utility program SpecView is provided to record the data externally See Appendix B for details on using SpecView ROIs This selection permits the setting of 3 ROI Regions of Interest for each measuring range A region of interest is a range of channels in the spectrum usually grouped around a peak of specific user interest Note that the range of channels in each ROI must be set with the convention that ROI 1 to be set at a lower portion of the spectrum than ROI 2 etc If the user tries to set ROI 1 higher than the channels set for ROI 2 the system software will change ROI 2 to always stay above ROI 1 The GR 130 has default values of ROIs specifically set for Cs 137 and the two Co 60 peaks Correct ROI channel selection dep
73. is feature is enabled only during the first 60 seconds after power on This 3 5 is to prevent inadvertent contrast adjustment during other system operation 60 seconds is normally long enough for adjusting contrast however if further adjustment is required switch the unit off then on again to obtain another 60 second adjustment period SURVEY Activate SURVEY mode by highlighting the item in the Main Menu and using a LONG DOWN to select The system display will show the current count rate in counts sec while the internal audio meter will give an audio response with the tone related to radiation intensity See 4 4 for more information Exploranium GR 130 Users Manual page 9 3 6 3 7 3 8 3 9 STABILIZATION Stabilization should be carried out before DOSE or ANALYSIS mode selection Select STABILIZATION from the Main Menu and complete the procedure by following the screen prompts This procedure requires the user to place the Cesium 137 Test Source Supplied against the face of the unit with the source label facing the instrument See Section 4 5 for more details ANALYSIS Selecting ANALYSIS from the Main Menu begins a spectral reading for a pre set duration At the end of the sample period a menu permits viewing the spectrum peak analysis Nuclide Identification storing the spectrum for later analysis and output of the spectrum to a PC DOSE METER DATA MEMORY Selection of this mode starts the Dose
74. isplayed at the bottom of the screen when more peaks have been identified than can be displayed on one screen A short CLICK DOWN will show the next screen with a continued display of computed peaks If more is not shown then all identified peaks are displayed and LONG DOWN returns you to the ANALYSIS 1 menu NOTE After the Peak Analysis display the user may go back to the Display Spectrum function where the peaks found during analysis will now be highlighted If the cursor is positioned at the top of any of these peaks the display will show the identified peak energy level in keV at the top of the display This feature is very useful for the experienced user to identify nuclides by their emitted energy The identified energy level in keV will typically be within 20 keV of the actual nuclide emission energy depending on system calibration and assuming the unit was properly stabilized 4 6 4 5 NUCLIDE IDENT When the NUCLIDE IDENT function is selected the GR 130 carries C out a fully automatic analysis of the last spectrum accumulated During this procedure peaks in the spectrum are identified by comparison of their energy level to those in an internal nuclide library The GR 130 then displays a list of all nuclides identified in Peak Area amplitude sequence so the most active peaks will be shown at the top of the list A sample output is shown in Figure 16 Cs 137 31893 N I 17241 RETURN Cs 137 This shows that Cs 137 was
75. isplayed in the Header The Dose Data data is automatically scaled at 10 000 thus a data set with values up to 10 000 nSv h will be displayed in the vertical scale as their actual values however a value above 10 000 nSv h will be scaled to uSv h with the new units updated in the header 4 CASpecView gr1 30ctst 4 l Main menu C Average 2 Points r 120 ma PA A V A A j s0 VAY A Na A Hi VYY A APY AM MAMAS eo y Y UY y y WJ y O RTT TT EEATT ELETEN TD 10 15 20 25 30 235 40 45 50 55 60 65 70 75 80 86 91 Seconds Exploranium GR 130 Users Manual page 54 3 7 Select Nuclide Libra This selection permits users to customize a library name this library then upload this library to the GR 130 memory to be used for Nuclide Identification When this item is selected the display will show the currently available libraries in the data box Select a library to upload to the GR130 Select Library Directory C SpecView Library Nuclear Options Default lib RETURN a CURRENT LIBRARY usually Default lib b CUSTOMIZE LIBRARY Click this box and a new screen Custom _lib vi appears The LEFT box is the l new user library and the RIGHT Nuclear Options box is the available selections To create a new library the user should proceed as follows Exploranium GR 130 Users Manual page 55 b Click on the LIBRARY TITLE and select a new na
76. l indicate the Filename and a new menu item flashing red will appear at the bottom of the display Press when finished input Exploranium GR 130 Users Manual page 50 Note that SIZE is shown as O at the upper right of the display This is the size of the file but since data transfer has not been initiated yet so it is zero In the GR 130 DATA MEMORY Menu select DUMP and follow the GR 130 display instructions to dump data to the PC press Button down As the data starts to transfer the SIZE number at the top right of the menu window starts to change When it stops the SIZE is the data file size in bytes as stored on disk When transfer is complete click the lower box Press when finished input to terminate the transfer function Note this is deliberately not automatic as the same software is used to transfer data in real time using the GR 130 Data gt PC capability In this case the user needs the ability to manually terminate the file When prosewnentinicnealinpur is clicked the data indicators are updated Thus if a file was transferred that had 16 spectra 7 Survey and 3 Dose date files the display would show Before data transfer View Spectral Data 0 View Survey data Chart 0 View Dose Data Chart 0 After data transfer View Spectral Data 16 View Survey Data Chart 7 View Dose Data Chart 3 Note that in the case of the Spectral data this number is the number of spectra in the file In the
77. l page 32 The vertical scale changes back according to the 30 rule that is the scale decreases such that the highest value appearing in the chart record is 30 of the maximum vertical scale In the above example the radiation level may drop to 105 counts at which time the vertical scale returns to 500 4 9 1 4 AUDIO METER This selection is used to determine the mode of operation of the Audio meter system AUDIO METER options are ON 50 100 150 200 250 OFF ON In this mode the variable radiation level digital data displayed on the screen will also give a variable tone audio which directly follows the radiation level Thus a sudden increase in radiation level will give a corresponding increase in audio pitch This is a very important feature of the SURVEY mode as it permits a very sensitive eyes free search tool The data is sampled at a 20Hz 50mSec rate with an optimized filter to give a quick audio response as radiation increases If this mode is selected then when the SURVEY mode is started the first 3 samples are averaged and a 2 Standard Deviations Audio Alarm Threshold set above this average value This stays as the permanent Audio Threshold until the mode is de selected and re started This method is suitable for most applications as it automatically averages Background levels to define a reasonable threshold above background 50 250 These selections permit a fixed count rate audio threshold to be selected rathe
78. lay the dose with the appropriate sub units e g FR nSv etc Note that the system changes to the higher units at the 30 point thus 100uR h is displayed as 100 uR h 200uR h is displayed as 200 uR h 300uR h is displayed as 0 3 mR h This unit switch method applies to all units and has been selected as the most user friendly method of scaling UNITS The user may select either R Sv or Gy Dose units GRAYS the system is calibrated to the AIR KERMA RATE for Dose in GRAYS R a conversion factor is used GRAYS R x114 NUREC ICRU 47 Sv 5V15 is directly calibrated in Ambient Dose Equivalent H 10 older versions used a conversion factor GRAYS SV x 1 14 4 9 4 3 AVERAGE Selections are ON OFF ON This selects the Average mode where the digital displayed data is UPDATED at a 1 sec rate but the data is the running average over the period set in the AVER TIME parameter AVER TIME 3 5 10 This selects the averaging period used Most users will find a 5 sec average a reasonable selection but the other values should suit most users requirements NOTE If an AVER TIME of 10 seconds is selected then the displayed data will update at a 1 sec rate but after 10 seconds the display will be showing the 10 second running average The ADVANTAGE of the averaging method is that short term fluctuations are suppressed so the displayed data is more steady The DISADVANTAGE of averaging is that on the 10 sec selection if
79. ma ray pulse processing electronics are Although the system will automatically compensate for Dead Time a high value over 20 suggests that the user is in a relatively high radiation field check DOSE METER Section 4 7 for hazard level Vertical scale of the accumulating spectrum The Vertical Scale is automatically changed such that the maximum peak of the display is within the vertical chart scale The Vertical Scale can be set to a fixed value by clicking UP or DOWN to the desired scale Channel Address This is the channel number at the cursor position see below The GR 130 is a 256 channel spectrometer therefore the number will be between 1 and 256 Cursor The cursor is a vertical display bar which appears as a position marker on the spectrum CC RI CO ST LT display It can be moved left or right by CLICK LEFT or CLICK RIGHT The cursor is moved to display selected channel data or selected ROI data The horizontal display has 128 pixels display points to display the spectrum If the full 256 channel display is selected in the SETUP menu see Section 4 10 2 each click left or right will move the cursor one channel as seen on the numeric data However the cursor will only visibly move one pixel on the display for every two clicks of the button This is the method for displaying the full 256 channel on a 128 pixel display That is two channels are summed for each line on the graphic display If the
80. me e g USER Library Note that this selection name is limited to 16 characters as the title name selected is written on the GR130 display Then click on an isotope in the right box should now be highlighted that you want to add to the library e g Cr 51 Now click the ADD button and the Cr 51 selection will appear in the left box Remove items from the left box by clicking on it e g K 40 should now be highlighted Now click on the REMOVE button and the K 40 selection is removed from the left box Repeat this process until the new library is complete Click SAVE LIBRARY Now double click on the LIBRARY folder icon so the Save box shows Library Now enter a filename at the File name location e g USER lib Be sure to type the lib file extension Now click the SAVE button The display goes back to the first library menu and the new library is shown in the left hand box together with the previous libraries e g Default lib UPLOAD LIBRARY TO THE GR 130 Select the appropriate library in the left box Click should be highlighted Inspect the library details shown on the right to be sure that this IS the library you want to upload to the GR 130 Ensure that the GR 130 is ON and the cable is connected from the GR130 COM port to the PC RS 232 port On the GR 130 perform the following Select MAINTENANCE from the MAIN MENU Select REMOTE gt The GR 130 display should say WAITING FOR
81. nt 15 FS per pulse Integral non linearity Max 0 3 full scale over top 98 of range Differential non linearity Max 3 full scale over top 98 of range Lower threshold Internally adjustable Upper threshold Fixed to Ch 256 all pulses above this level are Cosmic and are accumulated and displayed in Channel 256 ADC Offset Internally adjustable Maximum Count per Channel 65 535 Dead Time Correction Automatic 0 1 precision 5 2 1 HIGH COUNT RATE SYSTEM PERFORMANCE Test Condition The following data are maximum measured differences between low input count rate approx 2 000 cps and high count rate 25 000 cps using Cesium 137 at 110 channel 662 keV Zero Drift Max 0 5 channel Gain Drift Max 2 0 channel FWHM degradation Max 0 5 Exploranium GR 130 Users Manual page 41 5 3 DIGITAL PROCESSOR 5 3 1 ONE CHANNEL ANALYZER SURVEY MODE Sample time 1 2 3 10 20 30 60 s Energy threshold 25 keV Sensitivity 80 cps per 1 MBq at 1 m distance using Cs137 Chart Range AUTO 100 200 500 1K 2K 5K 10K 20K 50K Audio Meter OFF ON 50 100 150 200 250 Alarm levels AUTO 100 200 250 300 350 400 450 500 600 700 800 900 1K 2K 5K 9K Audio meter 50 mS response linear from 40 to 2000 Hz Automatic background correction Maximum count rate 65 535 cps Display chart recorder 128 dots resolution 60 samples Data Output OFF Memory or PC 5 3 2 SPECTRU
82. nternal DATA MEMORY is full as described above users should return to MAIN MENU LONG DOWN select Data Memory contents and dump the memory to an external PC When data transfer is complete erase the memory and then additional logging to memory can occur Stored data can be retrieved from the GR 130 and downloaded to an external PC by connecting the GR 130 to a computer via the data transfer cable provided and using Exploranium s SpecView data transfer and display utility which is also supplied It is recommended that the GR 130 be turned OFF before connecting the unit to the data transfer cable to avoid any potential instrument damage due to electronic transients To log data directly to a PC the user should start Exploranium s SpecView program Left click Start GR 130 RS 232 Serial Input A dialog box will appear requesting a file name Enter a name and left click Save Be sure the GR 130 is OFF and connect the GR 130 to COM Port 1 on the computer via the supplied data transfer cable Turn the GR 130 on and start Survey Each sample taken during the measurement will be transferred to the PC When measurement is finished the user should stop the Survey mode on the GR 130 Left click Press when finished Input The data may now be viewed by left clicking View Survey Data Chart Be sure to stop the GR 130 first See Appendix B for more information on SpecView Exploranium GR 130 Users Man
83. otopes required and the interaction problems being experienced Exploranium can usually rearrange the library to take account of some complex internal rules to optimize the library for the users actual application Exploranium GR 130 Users Manual page 63 APPENDIX F GR 130M MEDICAL version details This appendix describes operational differences between the standard GR 130 system covered in the Operating Manual and the GR 130M system specifically optimized for low energy spectral analysis applications 1 a b HARDWARE In order to optimize system performance for the low energy range where Medical isotopes occur the normal 0 1 5MeV range has been modified to 0 750keV to optimize low energy peaks thus GR 130M selection is 750keV and 3 0MeV unlike the normal GR 130 that gives the user the choice of 0 1 5MeV and 0 3MeV SOFTWARE In the following items manual references are made to the relevant section changes SETUP ANALYSIS manual section 4 9 2 4 RANGE now selectable as 750keV and 3 0MeV was 1 5MeV and 3 0MeV ONLY USE THE 750keV range for Medical Isotope testing as the library is optimized for this range DEFAULT LIBRARY manual section 4 6 4 5 b shows standard library There is a different standard library for the GR 130M optimized for Medical applications as follows Ga 67 1 131 In 111 Ir 192 TI 201 Co 57 Cr 51 Cs 137 I 123 Pd 103 Tc 99m Stabilization peak
84. page 12 4 2 4 3 Exploranium recommends that it is a sensible precaution to carry a spare set of ALKALINE batteries in the system pouch to act as a backup This ensures that battery failure does not prevent data acquisition when required For convenience most users tend to use the NiCd rechargeable batteries To provide some level of warning of imminent battery life if the batteries fall below a certain level then a 3 beep audio occurs and the Battery ICON changes to the message LOW The user has between 2 and 10 minutes of measuring time left in the battery at this time When there is no longer enough power to allow measuring the GR 130 turns off LOW Full Charge Y Charge Low Battery Warning Figure 3 Battery Icons DISPLAY CONTRAST When the unit is first turned ON the user may use the joystick to adjust the Display Contrast to suit themselves Clicking LEFT changes contrast to lighter clicking RIGHT changes contrast to darker The control is limited to 10 steps in either direction and when extremes are reached an audio double beep is heard to advise the user that they are at the limit of adjustment Note that the user set display contrast will be retained even when the unit is powered OFF NOTE This feature is enabled only during the first 60 seconds after power on This is to prevent inadvertent contrast adjustment during other system operations 60 seconds is normally long enough for adjusting contrast however if f
85. played during the SURVEY mode can be recorded in memory OR to a PC Recording to memory is implemented by selecting OUTPUT to MEM in the SETUP SURVEY menu When this mode is selected and the SURVEY mode is started the data is logged into memory at the selected Sample Rate The message SURVEY gt MEM will be displayed at the top of the screen during the survey to indicate that the data is being saved to memory Data recording is terminated when the memory is full or the mode is stopped LONG DOWN Every time the SURVEY mode is stopped then started again a new header is written so the data can be retrieved later with the appropriate time information Remember that all survey data will be loaded into memory until the data recording option is disabled in SETUP mode The data memory can record approximately 16 000 readings at the selected data rate Thus ata one sample per second data rate the memory will hold 4 5 hours of data Once the GR 130 memory is full the message MF memory full will be displayed at the top of the screen and the user gets a 3 beep audio warning and the SURVEY gt MEM label is removed The user should be aware that at the beginning of each new survey a header is stored in memory This header uses memory space equivalent to 5 survey samples Therefore if a large number of separate survey samples are stored in memory slightly less memory is available for samples than if the survey was taken in one complete set When the i
86. r Exploranium GR 130 Users Manual page 11 4 1 3 POWER ON To switch the unit on CLICK DOWN momentarily to the position marked ON When the display shows Figure 1 release the joystick EXPLORANIUM and an audio tone will be heard At this time an automatic self test procedure is started for the unit to extensively check all basic functions If any errors are detected they are displayed see Appendix A If no errors are found the display will change to the start up screen shown in Figure 4 after a f few seconds Version 5V15 Serial 9508 GR 130 Figure 1 4 1 4 BACKLIGHT ON A backlighting option is built into the GR 130 such that the display may be viewed in low light conditions Backlighting can be enabled only during the POWER ON procedure To enable the BACKLIGHT be sure that the unit is OFF then CLICK DOWN to the position marked ON and hold the button in this position After about 3 seconds the display will be illuminated after which the button may be released The BACKLIGHT will remain active until the unit is powered OFF The GR 130 has a built in battery saving feature such that the backlighting will not turn ON if the battery voltage is below 2 2 V This low voltage indicates that there is little battery life left Disabling the backlighting feature allows the user to use the remaining battery life optimally Note that to turn off the BACKLIGHT the unit must be switched OFF and switched ON normally Users sho
87. r NOTE The electronics assembly should come out EASILY if any obstruction is noted check the connectors are free If the frame is difficult to remove then the data transfer plug is not free from the plate DO NOT PULL hard on the face plate or the plug may be damaged Jiggle the handle while tilting the front end up to free the plug from the frame Put frame on the side so that the CPU board ASSY 87020 and EPROM are on the top Remove the existing EPROM from the socket using a thin flat head screwdriver by sliding the screwdriver edge between the socket and the EPROM and lifting the front edge Slide the screwdriver further towards the opposite edge and lift it out of the socket Insert the new EPROM into the socket without missing any pins AND with pin 1 of the chip towards the face plate and label markings facing the same direction as the other devices markings Put the unit back together following instructions in reverse order Exploranium GR 130 Users Manual page 67 If you have difficulties with the replacement call IRIAN KOMAR at 905 670 7071 Exploranium GR 130 Users Manual page 68 APPENDIX Z CHANGES IN THIS MANUAL Z 1 1 Z 2 NS N Ww ADO Bow NS Z 4 Changes from 4V02 to 4V03 Version 4V03 ensures that the GR 130 powers down after 2 5 minutes of idle use
88. r than the automatic selection as above Once this threshold is exceeded then the audio gives a variable tone following the variable radiation level OFF This selection switches the audio meter OFF and enables the ALARM LEVEL selection ALARM LEVEL OFF 100 200 300 400 500 1000 2000 3000 4000 5000 6000 7000 8000 9000 This selects a specified ALARM THRESHOLD LEVEL When this threshold is exceeded a FIXED FREQUENCY audio tone will be heard and the word ALARM will appear in the display 4 9 2 ANALYSIS This selection gives a new menu to set the parameters for the ANALYSIS mode of operation as shown in Figure 29 SET UP 2 fi DISP MODE 128 CH MEAS TIME 10s MEAS MODE LIVE RANGE 3 0 MeV AUDIO OFF SAMPLING SINGLE Figure 29 4 9 2 1 DISP MODE options are 128 256 The GR 130 is a 256 channel spectrometer however the display has only 128 pixels along the horizontal axis for this reason a special display technique is used as discussed below Exploranium GR 130 Users Manual page 33 128 Channel If this selection is made the ANALYSIS display will automatically show the first 128 channels Channel 1 128 of the standard 256 channel spectrum Note that a special rectangular box appears on the center top of the display with the left part filled in This is a visual indicator that the first half left half of the 256 channel spectrum is being displayed currently on the screen Ifthe cursor is moved beyond the right h
89. requirement for the extra headers Therefore the available memory display data should be used only as a guide The ANALYSIS mode records data in a much larger format as each reading is a full 256 channel spectrum Therefore a significantly lower number of Spectra than Dose or Survey samples can be stored in memory Exploranium GR 130 Users Manual page 29 4 8 2 DUMP Selecting DUMP allows the user to transfer stored Survey Dose and Spectral data to an external PC via the data transfer cable DATA oOo provided with the GR 130 and the supplied PC software It is critical that the GR 130 be turned OFF before connecting the unit to the data transfer cable If the unit remains ON any shock or TO DUMP MEMORY power surge arising from the connection may corrupt data in PUSH BUTTON DOWN memory TO CANCEL Selecting DUMP will produce the display shown in Figure 22 PUSH BUTTON UP When the appropriate PC software is operating data may be transferred by CLICK DOWN Pushing the button up will cancel this function See Appendix B for more details Figure 22 If the data transfer does not start repeat the CLICK DOWN making sure that the button is released quickly 4 8 3 ERASE Selecting this function produces the display shown in Figure 23 0 TS a Pressing the button down three times erases the data memory completely The first two times the button is pressed the word CLEAR should appear at the bottom of the display TO ERASE
90. rror as it may indicate that the wrong isotope has been used for system stabilization Check that the correct source and procedure is used and repeat Stabilization If the error occurs during Stabilization and the correct isotope and procedure is used then this error message indicates that automatic system gain correction is not possible This usually means there is a problem with the detector The system is totally UNUSABLE in the ANALYSIS or DOSE METER modes as calibration is probably seriously affected However it is possible that the detector can still be used for a short period of time in the SURVEY mode where calibration is not essential Regardless of whether the GR 130 functions in survey mode the unit should be serviced as soon as possible 40 255 REMOTE only Special series of error messages only available when system is in the REMOTE mode See Section D A 2 DISPLAY MESSAGES SERIAL Displays the Serial Number of the instrument on startup Version e g 4V03 Displays software version on start up STABILIZATION in PROGRESS Indicates that the system is carrying out Stabilization to automatically adjust system gain for optimum performance REMOVE Cs SOURCE Indicates that system Stabilization has been completed and the test source can now be removed and replaced in its carrying compartment CANNOT FIND Cs 137 Indicates that the automatic stabilization process cannot locate the specified Cesium 137 peak This can be ca
91. see special Appendix G this model is specially designed for Geophysical users The unit uses either the normal GR 130 Sodium Iodide Nal or optionally a Bismuth Germanate BGO detector for higher sensitivity SOFTWARE RELEASES Latest software release with details of system changes and improvements are detailed in Appendix Z Exploranium GR 130 Users Manual page 5 2 0 SYSTEM DESCRIPTION amp FEATURES 2 1 A B c 2 2 a b c d OPERATIONAL MODES The GR 130 may be operated in 3 Primary Modes SURVEY mode In survey mode the GR 130 acts as a scintillometer or Survey Meter displaying the current COUNT RATE in counts sec A variable tone AUDIO will indicate radiation intensity with an automatic audio meter or user adjusted alarm level A chart record of the last 60 data points is displayed on the screen during the survey Survey mode is typically used to search for radioactive material or to carry out Total Count grid surveys DOSE METER mode This mode displays the current DOSE RATE in selectable units and quantities as well as ACCUMULATED DOSE from the time the mode was enabled The dose meter is used to determine the relative hazard level and to assess handling requirements of a radioactive material Dose surveys of an area can also be carried out in this mode NUCLIDE IDENTIFICATION ANALYSIS mode In analysis mode the GR 130 accumulates spectral data from a sample and analyses the spectr
92. selected to be used as a Reference spectrum for spectrum comparisons etc The display describes the various capabilities gt SumSpec vi Zj The Background Spectrum option will average all of the selected spectra from the current file 1 Input the spectra you intend on using for the Background either via the SERIAL PORT or FILE INPUT If you have not input any spectra you must CANCEL and use an input function first 2 Select the range of spectra desired by their sequential record number 3 The background will be saved to a file BG DEF inside your installation directory and will remain until you overwrite or delete it Select Spectra ve to a File EN EN EM From Total Select All Spectra all from a File 4C SpecView cox3 This file can be created selected as follows RECALL from FILE Permits selection of a previously stored file from disk Select All Spectra Takes ALL the spectra in the current file and averages them to create an average spectra if this is required as a BACKGROUND reference From To This permits the user to select a batch of files or 1 file from the current data file and average them as a reference BACKGROUND spectrum Save as Background Once selected as above pressing this GREEN button enters the selected file as a BACKGROUND reference 3 4 View Spectral Data This displays the selected File Edit Operate Windows Help spectra and certain data EXPLORANIUM GR130 from its
93. t is provided with the unit This boot is custom molded from a compressive material and once installed provides a high level of protection from accidents With the boot in place the unit s basic rugged design is further improved enabling the unit to withstand accidental drops or knocks against hard material The boot also provides an advantage when the unit is placed on wet or muddy ground by keeping the unit clean and free from dirt Note that this boot adds slightly to the system weight and is easily removed if required however Exploranium recommends using the unit with the boot in place whenever possible BATTERIES The GR 130 is supplied with a set of two D cell Nickel Cadmium rechargeable batteries that provide up to 15 hours of system operation when fully charged ALKALINE batteries may also be used in the GR 130 and provide up to 25 hours of operation Users are reminded NOT to plug in the battery charger while ALKALINE batteries are being used as this will result in system damage and battery leakage See Section 4 1 1 for details BATTERY CHARGER A battery charger with AC DC power source is supplied with the unit Three styles are currently available with different input plugs to suit International use These models are p North American style 110V 60Hz q European style 230V 50 Hz r Australian type 220V 60Hz Special variations available on request for different applications The battery charger is plugg
94. to be carried out with the Calibration staff to develop a protocol to Calibrate this low Dose instrument The GR 130 is a highly specialized instrument that requires some user input to achieve correct performance In some cases the results from local Calibration labs may be different from the factory calibrated GR 130 instruments Since officially certified labs may use different calibration techniques The GR 130 incorporates a special DOSE CORRECTION mode to permit users who are experiencing local calibration errors to correct the data to achieve the required local certification See SETUP DOSE METER in section 4 9 4 4 7 6 CALIBRATION and DOSE UNITS The GR 130 has a Sodium Iodide detector and a GM tube For practical reasons since the Sodium lIodide detector is the primary Dose measurement device the Calibration Reference point is defined as the center of that detector as shown in the figure below Thus all system Calibrations use this Reference Point Since the actual GM tube position is closer to the front of the detector normally it s Dose levels would be in error but this is compensated for in System Calibration NOTE a homogenous Dose Calibration field is assumed this means that for sources VERY CLOSE to the detector system geometry effects may give Dose errors Exploranium GR 130 Users Manual page 27 e acid Central GR 130 CALIBRATION Reference Point UNITS The user may select either R Sv or Gy Dose units GR
95. to the disk drive follow screen prompts to complete the installation reboot the computer as instructed at the end NOTE Once this Engine is installed then future upgrades of SpecView will not require Run Time Engine reinstallation If the Run Time Engine is already installed press Cancel when asked to load it Exploranium GR 130 Users Manual page 49 3 0 OPERATION Run the program by setting up an icon on the Desktop When started the following display is seen i QUIT Select Background Spectrum Com Port 1 GR 130 SpecView version 3 1 EXPLORANIUM RADIATION DETECTION SYSTEMS MENU ITEMS 1 3 Start GR130 RS 232 serial input This selection is used to download data stored in a GR 130 instrument into the memory of the PC for analysis display etc connect the COM port of the GR130 to the PC RS 232 input port using the supplied cable On the SpecView display select the correct Com port 1 9 usually 1 If the wrong selection is made an error display will appear Error 37 occurred at Com port please select another port Possible reasons LabVIEW Device not found If the Com port is OK no error message will appear so data input can proceed Select Start GR130 RS 232 serial input with the mouse and click Enter a user selected file name in the File Name box and select the appropriate directory to store the data Click Save The display wil
96. ual page 15 4 4 2 SURVEY RANGE 4 5 In SURVEY mode the GR 130 automatically selects the 0 1 5 MeV spectral range thus setting a lower signal threshold of 25 keV This low signal threshold significantly improves the GR 130 sensitivity The SURVEY mode is primarily used for searching for radioactive material therefore high sensitivity is a prime requirement Because the signal from a radioactive source falls off sharply with distance i e doubling the distance from a source reduces system sensitivity by FOUR times maximum sensitivity is required to detect radioactive sources buried under other non radioactive material As discussed in the previous section the survey data is only valid for radiation levels which produce a countrate below 65535 cps Above this level the GR 130 hardware becomes saturated and will continue to display gt 65535 cps regardless of how much higher the radiation level rises See Section 4 9 2 4 for more information NOTE The GR 130 has a special HIGH DYNAMIC RANGE option in which a small G M tube can be optionally added to increase the system dynamic range for DOSE measurements see Section 4 7 2 for more details The addition of the G M tube may be requested from Exploranium and the instrument returned to the factory for installation If you are uncertain whether your GR 130 contains a G M tube simply look at the serial number label on the bottom of the instrument A GM printed after the serial number in
97. uld be aware that enabling the backlighting feature reduces battery life by an estimated 50 4 1 5 POWER OFF MANUAL To power the unit OFF CLICK UP and hold for 3 seconds The display will show Figure 2 with the seconds counting down 3 2 1 After this countdown the unit powers OFF At any time during the countdown releasing the button will cancel the power OFF 4 1 6 POWER OFF AUTOMATIC If the unit is left in any menu position for approx 2 5 minutes it will automatically turn off This feature is automatically disabled when in data recording mode i e DOSE SURVEY or ANALYSIS when in some Maintenance modes and during REMOTE operation Figure 2 TURNING OFF 3 2 1 4 1 7 LOW BATTERY WARNINGS The Battery ICON at the top right of the display is intended to provide the user with an idea of the current battery status Unfortunately rechargeable NiCd batteries exhibit a very flat discharge curve This means that for a very long period the battery voltage is almost constant and then it will suddenly discharge very rapidly at the end of battery charge This battery characteristic means that it is not possible to display an accurate battery life indication If ALKALINE batteries are used they have a relatively prolonged discharge curve so the battery ICON in this mode is more accurate For these technical reasons most users rely on an overnight charge to fill the batteries up prior to use Exploranium GR 130 Users Manual
98. um in terms of emitted energy level and net count contribution The nuclides responsible for producing the spectrum are identified by comparison to a nuclide library and presented in tabular form This essential information can then be used to determine risk assessment SYSTEM FEATURES INSTRUMENT BODY The instrument body consists of 2 primary parts the lower case and top panel The lower case is deep formed aluminum that provides a strong basic structure The top panel is specially formed ABS plastic that minimizes weight while maintaining the ruggedness of the unit The combination of the two parts provides a high degree of system strength suitable for field operations where mechanical abuse may be unavoidable DETECTOR The 4 5 cu in 0 07L Sodium Iodide Nal Tl detector assembly is specially designed for rugged environments The Nal crystal is enclosed in a specially molded rubber sleeve to give a high degree of mechanical protection against shock and is fully enclosed within the instrument body HANDLE The handle is a custom designed molded rubber part with a carefully designed diameter and special indentations for fingers The rubber type was selected to give a good balance between strength and comfort JOYSTICK BUTTON The GR 130 has only one operating control the joystick The unit is operated using the rubber covered button on the joystick handle hereafter referred to as the BUTTON The BUTTON is a specially designed switch
99. unsigned char roi_od O 1 roi 2 start channel 1 5MeV 13 unsigned char roi_od 0 2 roi 3 start channel 1 5MeV 14 unsigned char roi_od 0 3 roi 0 start channel 1 5MeV 15 unsigned char roi_od 1 0 roi 1 start channel 3MeV 16 unsigned char roi_od 1 1 roi 2 start channel 3MeV 17 unsigned char roi_od 1 2 roi 3 start channel 3MeV 18 unsigned char roi_od 1 3 roi 0 start channel 3MeV 19 unsigned char roi_od 0 0 roi 1 start channel 1 5MeV 20 unsigned char roi_od O 1 roi 2 start channel 1 5MeV 21 unsigned char roi_od 0 2 roi 3 start channel 1 5MeV 22 unsigned char roi_od 0 3 roi 0 start channel 1 5MeV 23 unsigned char roi_od 1 0 roi 1 start channel 3MeV 24 unsigned char roi_od 1 1 roi 2 start channel 3MeV 25 unsigned char roi_od 1 2 roi 3 start channel 3MeV 26 unsigned char roi_od 1 3 roi 0 start channel 3MeV 27 30 float ecal 0 energy calibration offset 31 34 float ecal 1 energy calibration slope 35 38 float ecal 2 energy calibration quadratic 39 unsigned char sutime survey sampling time in seconds 40 41 unsigned int srange survey chart scale max value 42 unsigned char saudio audio meter O ON 1 OFF 43 unsigned char sm_mode survey output O OFF 1 MEM 2 PC 44 45 unsigned int salev survey audio alarm mode 46 unsigned char dotime Dose integrating time in secs 47 unsigned char dunit Dose unit 48 unsigned char dm_mode Dose output O OFF 1 PC 2 MEM 49 unsigned char daver display aver
100. urther adjustment is required switch the unit off then on again to obtain another 60 second adjustment period MAIN MENU After the initial start up screen the GR 130 Main Menu appears as shown in Figure 4 The user may scroll through the menu items by a short CLICK UP or CLICK DOWN Areverse highlighting shows the i SURVEY current menu item selected STABILIZATION ANALYSIS A convenient feature of the GR 130 is that when the unit is powered DOSE METER ON the highlighted selection automatically goes to the mode that was DATA MEMORY last used Thus if the user frequently uses SURVEY mode at power SET UP ON SURVEY will automatically be highlighted and a simple click will MAINTENANCE activate this feature Menu items are selected by highlighting the desired item and using a LONG DOWN to activate Figure 4 Exploranium GR 130 Users Manual page 13 4 4 SURVEY Once the word SURVEY is highlighted a LONG DOWN will activate RUI gt 7s the mode The survey mode display is shown in Figure 5 y pay 9 15 12 MEAS SURVEY Shows that the system is in the SURVEY mode 54 cps el Isthe Battery Icon showing battery status 15 12 Current time from system internal clock MEAS means unit is measuring STOP means it is not measuring Figure 5 54cps Is the current count rate in counts per second cps updated every sample period 1 Indicates the sample period If the sample period is set to 1 second the
101. used by many things including wrong source used no source used source placed too far away from detector etc Refer to Section 4 5 3 on stabilization for the correct procedure Exploranium GR 130 Users Manual page 46 STABILIZATION WAS INTERRUPTED Button action interrupted the Stabilization process Restart the procedure by selecting Stabilization from the Main Menu PRESS BUTTON DOWN Press the joystick button briefly towards the ON position as indicated on the handle label This is referred to as CLICK DOWN LONG PRESS DOWN TO CONTINUE Press the button towards the ON position for a longer period of time 1 second the program will then move to the next display UP TO CONTINUE This gives the option of moving the button to the UP position towards the OFF label on the handle to NOT activate the next feature This action usually bypasses a selected feature and terminates the option CONTROL IS CHANGED TO THE REMOTE MODE A special software sequence has been initiated from a remote PC via the RS 232 port and now the unit is responding only to commands from the remote PC See Section D REMOTE CONTROL ALREADY ACTIVE The action carried out from the remote PC is unnecessary as the system has already been placed in the REMOTE mode LOAD DEFAULTS PUSH DOWN TO LOAD or UP TO LEAVE If the button is pressed DOWN then Default parameter are loaded if the button is pressed UP then this action is bypassed There is a special selection
102. using SpecView Recording to memory is implemented by selecting OUTPUT to MEM in the SETUP DOSE METER menu If this mode is set the measured dose data is logged into memory at the selected sample rate The top of the screen will display the message DOSE gt MEM to indicate that the current data is being stored in memory Accumulation is terminated when the memory is full or the measurement is stopped LONG DOWN Note that only the Dose Rate data is stored in memory and not the total accumulated dose Exploranium GR 130 Users Manual page 26 When saving Dose data to memory it is critical that the user stops the Dose meter with a LONG DOWN and uses a LONG DOWN to return to the main menu when the survey is complete Incorrect termination of dose meter mode may result in data being lost or corrupted The user should be aware that any time the dose meter mode is stopped incorrectly batteries removed loss of power etc the data being stored at the time of termination may be corrupt If this occurs it is recommended that the dose survey be repeated to ensure valid data is recorded The GR 130 has sufficient memory to store approximately 16 000 readings at the selected sample rate Thus at a 1 second sample rate the unit will hold 4 5 hours of data Recall that the same memory is also used for Survey and Spectral data so that storage of this information will result in less space available for the storage of dose data Once the GR 13
103. ved across the spectrum by CLICK RIGHT and CLICK LEFT holding the button LEFT or RIGHT will automatically scan at an increasingly fast rate The cursor position is shown in CHANNELS and in ENERGY LEVEL keV CLICK UP and CLICK DOWN may be used to change the vertical scale of the display for more detailed analysis of the spectral display The data displayed below the spectrum is identical to that described in Section 4 6 1 and is repeated below in simplified form NOTE NOTE 13 01 Time of Day HH MM 116 of spectra stored in memory if this spectrum is stored it would be 117 EN 267 Energy Level of the cursor position in keV note that this display position shows DT Dead Time during sampling vs 10K Vertical Scale of the display 10 000 cts sec CA 117 Cursor position Channel 117 cc 140 Total Counts at cursor channel location 140 cts RI 0 Cursor is located in ROI 0 co 1381 Total counts in the selected ROI in sample sample period LT 50 Run Time 50 secs could be CT as described above ST 50 Sample Time 50 seconds The GR 130 system has a built in conversion utility for keV to channel number conversion used to produce the EN data Each unit is INDIVIDUALLY calibrated to ensure maximum accuracy typical values shown below This conversion is a quadratic function and is used as follows A Quad function 0 00567 B Linear function 12 0102 C Offset function 11 798 P measured channel number Us
104. witch off once the battery voltage drops below a set point Exploranium GR 130 Users Manual page 47 NO PEAKS This message is displayed if no peaks are identified during Peak Analysis in the ANALYSIS mode This indicates that Nuclide Identification cannot be carried out Repeating the analysis with a longer sample rate can improve count statistics and may permit recognition of a small radiation source above the statistical noise level OVERLOAD OVF OVLD MF This message indicates that the signal processing capabilities of the GR 130 have been overloaded In some cases operation will be terminated however if operation is not terminated the data obtained at the time of system overload is questionable and should be used with discretion This message in analysis shows that during spectrum data accumulation one or more data channels overflowed The maximum counts channel is 65500 cts and if this level is exceed the warning message OVF shows on the display and the channels amplitude is frozen at this maximum level This message only means that the overflowed channels are a problem and the rest of the spectra is still useable In Survey Mode this message means that the selected range for the chart recorder has been exceeded This message appears above the units in Total Dose and means that at some time since entering the Dose mode the Dose Rate went into overload so the accuracy of the Total Dose cannot be ensured Memory
105. with four actions forward back left right The BUTTON can also be pressed inward however there is no function for this action All system functions are controlled by the BUTTON The BUTTON and use of menu driven functions makes the GR 130 very easy to operate and avoids the necessity of memorizing complex sequences of action Exploranium GR 130 Users Manual page 6 e f g h DISPLAY An LCD was selected for the GR 130 to permit a full range of alphanumeric and graphic display capabilities This LCD gives excellent contrast in high light conditions but is not easily visible in low light conditions To solve this problem the system has a backlighting function which provides excellent visibility in a low light environment The display contrast may also be manually adjusted depending on ambient light conditions BACK DOOR The GR 130 has a back door that is removable by a turn of the integrated catch handle The door may be removed to allow access to the battery compartment to change batteries and the I O connectors as required NOTE Use of the DOCKING STATION usually means that access to these I O connections is rarely used The door is gasketed to provide a high degree of water protection when in place Rear View with Battery Door Removed COM RS 232 Communication Connector COM 3VDC Battery Charging Connector AY avoc BOOT A yellow boo
106. y 100 20 67 Accumulation Time 1 5 1 5 for Equiv Accuracy 1 min 5 min 1 5 min Normalized Std 1 2 25 1 22 Error System Weight 17 Ibs 7 7 kg 5 3 Ibs 2 4 kg 5 8 Ibs 2 6 kg Note Significant improvement can be achieved by taking longer samples Exploranium GR 130 Users Manual page 65 B DETAILS MAIN MENU El 1 MAIN MENU The ANALYSIS function used in the standard 130 has been SURVEY replaced by the ASSAY function required in Geophysical STABILIZATION applications ASSAY DOSE METER So the Main Menu for the 130G shows DATA MEMORY SET UP MAINTENANCE 2 ASSAY If ASSAY is selected this figure appears and continues until the aes end of sample is reached 13 01 116 MEAS ASSAY RESULTS At the end of the sample the data display changes to show the data results As the figure shows the display shows the data results in ppm ppm cpm for eU and eTh and for K 0 2 332 Each unit is calibrated on Exploranium Test Pads so the data 0 1 71 results are presented in the computed Assay form K U 4 9 71 Th 1 2 10 LONG PRESS DOWN TO CONTINUE 3 SETUP mode The only difference from the normal 130 unit in this menu is that the RANGE selection is locked at 3MeV and not selectable This 3MeV range is necessary for Geophysical usage and matches the system Calibration data 4 DOSE METER This function is fully enabled and is fully calibrated Note that the Dose is energy indep

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