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GR-100 User's Manual Revision 1.2

5.0 Technical specifications

5.0 Technical specifications

5.1 Gamma detector and analog processor

Detector:

Cesium-Iodide Thallium Doped Crystal [CsI(Tl)] 0.3 cu ins ( 5 cm3 ) Volume,

0.5" Dia x 1.5” Long (13 mm Dia x 38 mm Long) with an integral bi-alkali PMT

Energy Range:

From 40 keV

Sensitivity:

15 cps per 1 MBq at 1 m distance using Cs-137

Number of Channels: 5 Channels plus Total Count

Maximum Count Rate: 9 999 cps

Modes of Measurement:

Monitoring, Searching, Long Counting

]

5.2 Neutron detector and analog processor

Detector:

Lithium-Iodide Solid State Detector

Sensitivity:

1 cps per 0.01 mg 252 Cf (about 20 000n/s) at 0.25 m Distance, Aaverage

Background 0.05 cps

Number of Channels: 1 Channel

Modes of Measurement:

Monitoring, Searching, Long Counting

5.3 Monitoring

Sample Time:

1 s

Gamma Alarm Level: Selectable 3.0 – 10.0 times the Background Standard Deviation,

Automatic Background Correction

Neutron Alarm Level: Selectable 3 – 10 counts per 6 sec Counting Period

Audio Alert :

Buzzer: OFF, ON.

Visual Alert :

Yellow LED for Gamma Alarm, Red LED for Neutron Alarm

Vibrator: ON,

OFF

SAIC/Exploranium – Proprietary

Page 32

Revision Date:

November 2004

Содержание GR-100

Страница 1: ...GR 100 Personal Radiation Monitor User s Manual Revision 1 2 Software Version 1V81 November 2004 Part Number 32014 1 ...

Страница 2: ...LORANIUM ACCEPTS THAT IT IS THE RIGHT OF SUCH USERS TO BE PRIVY TO THIS INFORMATION HOWEVER THIS DOCUMENTATION IS PROVIDED SOLELY FOR THE BENEFIT OF OWNERS OF THE GR 100 SYSTEM AND DISSEMINATION OF THE DETAILED TECHNICAL INFORMATION PROVIDED MAY BE CONSIDERED AS LEGALLY CONTRAVENING THE NORMAL SUPPLIER CUSTOMER RELATIONSHIP UNAUTHORIZED RELEASE OF DETAILED TECHNICAL INFORMATION TO A THIRD PARTY WI...

Страница 3: ... Parameters 11 3 3 Setting DATE TIME 12 3 4 Long Count Mode 13 3 5 Return to Monitoring Mode 13 3 6 Remote setup 14 3 7 Earphone 14 3 8 Battery charging 15 3 9 Belt mounting 16 3 10 Gamma alarm test 16 4 0 Monitor 100U PC software 17 4 1 Testing the GR 100 19 4 2 Setting up parameters 22 4 2 1 Vibrator 23 4 2 2 Buzzer 23 4 2 3 LCD 23 4 2 4 Dose Units 24 4 2 5 Discriminator 24 4 2 6 Alarm Threshold...

Страница 4: ...processor 32 5 3 Monitoring 32 5 4 Searching 33 5 5 Dosemeter 33 5 6 Clock Calendar 33 5 7 Data storage 33 5 8 Data output 34 5 9 Display 34 5 10 Power supply option 34 5 11 Connectors 35 5 12 Connectors 35 5 13 Environmental 35 5 14 Accessories 35 Appendix A Error messages 37 SAIC Exploranium Proprietary Page iv Revision Date November 2004 ...

Страница 5: ...ton operation and user friendly operator interface make it truly an ideal front line tool for a variety of users involved in detection and interception of radioactive and nuclear materials 1 2 System description Standard GR 100 Personal Radiation Monitor system consists of GR 100 Personal Radiation Monitor Unit Two AA Alkaline Batteries Earphone With Volume Control Belt Mounted Carrying pouch PC I...

Страница 6: ...he Radiation alarm is displayed via one digit LED display on the top of the unit This display is clearly visible when unit is worn on a belt An Alarm is also indicated with an audio beeper and a vibrator An earphone with volume control is provided for operation in noisy environments It connects to an audio jack located at the bottom of the unit under a rubber protection cap This cap also conceals ...

Страница 7: ...itor Accessories The following figure shows the GR 100 accessories Belt mounted carrying pouch 0 25 Micro Currie Cesium137 Test Source CD With GR 100 Monitor Software PC interface cable Earphone with Volume Control SAIC Exploranium Proprietary Page 3 Revision Date November 2004 ...

Страница 8: ...tment being sure to place the bottom of the battery on the spring and the top to the brass terminal Seat the battery firmly in place above the removal strap then clip the battery cover in place NOTE All measured data is stored in non volatile memory and they remain in the memory even if the battery is removed after the correct power down sequence CAUTION If you remove the battery while the GR 100 ...

Страница 9: ... be displayed if the remaining capacity of the battery is less than about 5 10 It is possible to continue using the unit for a few hours but it is recommended to change or charge battery soon NOTE To save remaining battery power the backlighting cannot be activated when LOW BATTERY is displayed If you continue using the unit and the battery becomes completely discharged the following screen is dis...

Страница 10: ...TCH OFF 1 2 5 Updating the Background screen After initial start up the system must accumulate a radiation background level to assess the local background Be sure to do this while at a sufficient distance from possible radiation sources The display shows a 5 second countdown 5 4 3 2 1 during this process 12 57 UPDATING BACKGROUND 4 At the end of this period the local background is stored in memory...

Страница 11: ...ut it is calculated from the signal measured during the last 10 seconds Current Dose Rate can be measured in three different units Gy hr Grays per hour units are used mostly in Europe for radiation Dose Rate measurements R hr Roentgens per hour units of exposure to radiation are used mostly in North America Sv hr Sievert per hour units are used for equivalent Dose Rate when the person s health ris...

Страница 12: ...rs in which case the updating is suspended until the alarm is cancelled and Monitoring mode is restarted It is strongly recommended that you step back from the source before switching to Monitor mode to make sure the background is truly reflective of only the local radiation level and not the anomalous level due to the detected source Also note that once the alarm threshold is set using this techn...

Страница 13: ... mode will return the unit to the MONITOR mode If no action is taken in SEARCH mode for 15 minutes the unit will return to the monitoring mode automatically 2 8 3 Search Response The following response is obtained in the SEARCH mode As the unit approaches radioactive material the COUNT display 234 above increases to show that the radiation intensity is increasing If any neutron radiation is presen...

Страница 14: ......

Страница 15: ...ng LONG COUNT enables measurement over an extended period of time MONITOR returns back to the monitoring mode 3 1 Search Mode While in the monitor MON display press LONG until you see SEARCH Release the button when the search screen is displayed Subsequent LONG press will select the search mode the following screen will be shown briefly and then the full SEARCH screen will be displayed SEARCH SELE...

Страница 16: ...minated during switching ON procedure in case of ALARM during SEARCH mode operation and 10 seconds after any button activation During backlighting the battery drain is increased about 10 times Normally it decreases the battery life 2 or 3 times according to the ratio between MONITOR and SEARCH mode In the rare occasions that this feature is actually required it can be temporarily enabled as descri...

Страница 17: ...ow 28620 2 indicates the total number of counts per the total counting time period for the respective gamma and neutron detector The second data row 31 0 00 indicates the count rate with the respective gamma and neutron detector The third data row 901 sec indicates the total counting time period in seconds The SHORT press resumes the standard monitoring mode again 3 5 Return to Monitoring Mode If ...

Страница 18: ... lifting the rubber cover The earphone jack is located under the rubber cover on the left hand side The right hand side is fixed to avoid the loss of the cover When connected it automatically disables the internal audio beeper NOTE The BUZZER must be enabled for this function to work When the earphone is unplugged the unit automatically reverts to internal audio functions Figure Earphone Connectio...

Страница 19: ...R 100 if the battery is not correctly placed in the battery compartment While charging the battery the yellow LED is ON continuously to indicate charging is in progress and the LCD displays the following screen CHARGING ON TIME 0 min 1 40V 221mA The charging time in minutes is displayed in the middle row the voltage on the batteries and the charging current is shown in the bottom row Normal batter...

Страница 20: ...e the case There is space enough for the connector inside the case It is then easily possible to take out the GR 100 from the case and follow the display during SEARCHING without disconnecting the earphone 3 10 Gamma alarm test For fast and easy alarm test use the reference source included with the unit Run GR 100 in the monitor mode and move the reference source close to the back right hand side ...

Страница 21: ...the unit connect one side of the cable to the serial port at the back of your PC Note the serial port number 4 Pull the left hand side of the rubber cover on the bottom of the GR 100 to gain access to the connectors The right hand side of the rubber cover is affixed to the case to prevent accidental loss of the cover Connect the mini USB connector of the serial cable to the mating mini USB jack on...

Страница 22: ...een the PC and the unit may occur In this case the program displays an error message and stops the operation Close the program and restart it again after the GR 100 has been connected to the PC If the GR 100 unit is connected to the COM 1 port on the PC it will start communicating with the PC automatically If it is connected to a different port an error message will appear and you must do the foll...

Страница 23: ...reen labeled Tests During a test a button s label changes to STOP to enable interruption of the procedure The HW Tests screen has the following fields and controls White field upper left Shows the system messages for the provided operations Gray field upper right Shows the measured data in graphical form The color for this field turns yellow for gamma data and blue for neutron data Single Repeat A...

Страница 24: ...age V and the actual battery current mA for instance 12 10 00 1 35 210 DAC0 DAC1 Sets the discriminator channels for gamma DAC0 and neutron DAC1 The button next to it allows you to display the values in steps or mV This button also has a third option called saw tooth for special DAC0 DAC1 tests Counters Reads and displays the number of pulses in the gamma and neutron channels and the live time The...

Страница 25: ... LLD Spectrum or MCA Spectrum buttons 2 Click the Gamma Neutron button to select the status of the Gamma detector or the Neutron detector 3 Set the time of measurement 1 to 60 seconds for LLD or any time for MCA in the field Time sec The first method LLD is provided by moving the discrimination level It takes time but in some cases it can be very useful since the measurement is provided the same w...

Страница 26: ...e menu bar The Setting screen appears This screen has a frame containing a series of buttons and data fields for the User Settings and three separate buttons to the right of the frame for displaying and saving the selected sets of settings The unit comes with a set of standard parameters and settings loaded at the factory as default settings These settings are permanently stored in the memory and ...

Страница 27: ...button toggles between ON and OFF setting While the vibrator action increases the electrical current consumption by a factor of ten when it is running it has no effect on the battery life in the absence of alarms 4 2 2 Buzzer The ON OFF button in the Buzzer frame allows you to enable or disable the audio beeper indicating an alarm condition Clicking on the button toggles between ON and OFF setting...

Страница 28: ...ting The Neutron alarm threshold setting represents the number of neutrons detected in one count period 6 sec that the measured signal must exceed to trigger an alarm The neutron threshold is a fixed value unlike the gamma threshold that changes proportionally to changing background Using a fixed neutron threshold is possible because the background neutron count rate is very low and it is not vary...

Страница 29: ...retrieved from the unit The buttons below the white window enable you to read various type of data from the unit s memory display it in the window print a hard copy of the displayed data save the data to a selected folder in your PC and erase the data from the unit s memory The buttons contained within the ALARMS DIAGNOSTC frame are used to handle the alarm and diagnostic data and the buttons in t...

Страница 30: ...t to the PC The alarm data is displayed in the chronological order All alarms that have occurred since the last time the alarm memory was cleared are displayed The data will appear on the screen as shown bellow The alarm display has two sections the header information and the actual alarm data The header contains Two write and read memory location numbers Date Time Unit s Serial Number and Current...

Страница 31: ...at and can be viewed with a variety of editing word processing and spreadsheet programs It can be distributed by email A hard copy of the data can be obtained by setting the Print button to the ENABLED state and clicking on the Read Alarms button The data is printed in a columnar format with a header as shown above Printing and saving operations can be done simultaneously if both Print and Save to...

Страница 32: ...der identical to the alarms header and eight data columns below the header The columns represent from left to right Date Time Battery Voltage Battery Current Battery Type Battery Icon Status ICA Battery Capacity Status and Diagnostic Event Code as shown below 03 10 31 20 57 16 1 27 21 1 12 255 P Battery Type ICA 0 255 Event Code Battery Icon 0 12 Battery Current mA Battery Voltage V Time Date 03 1...

Страница 33: ...he data is obtained by setting the Print button to the ENABLED state and clicking on the Read Diagnostic button The data is printed in a columnar format with a header as shown above 4 3 3 Accumulated Dose Data Retrieval The procedures for retrieving printing saving and erasing the accumulated dose data are identical to those used for the alarm data as described previously Clicking on the Read Dose...

Страница 34: ...apacity Status and Dose Code as shown below The total gamma dose accumulated during the measured period of time is always shown in nSv regardless which units were selected in the GR 100 prior to starting the measurement 03 10 31 20 29 47 575 1264 1 27 255 D Accumulation Time Period sec Battery Voltage V Dose Code ICA 0 255 Accumulated Dose nSv nGy nR Time Date 03 10 31 20 34 10 111 234 1 27 255 D ...

Страница 35: ...le to identify the file in the data directory Clicking on the Clear Dose button deletes the dose records from the GR 100 memory You should be careful not to erase the dose data until you verified that it was saved correctly under the desired file name The data can be downloaded from the unit and saved repeatedly until it is finally erased If the file name is incorrect or other errors were made you...

Страница 36: ...arching Long Counting 5 2 Neutron detector and analog processor Detector Lithium Iodide Solid State Detector Sensitivity 1 cps per 0 01 mg 252 Cf about 20 000n s at 0 25 m Distance Aaverage Background 0 05 cps Number of Channels 1 Channel Modes of Measurement Monitoring Searching Long Counting 5 3 Monitoring Sample Time 1 s Gamma Alarm Level Selectable 3 0 10 0 times the Background Standard Deviat...

Страница 37: ...ectable R Sv Gy Measurement Range 10 µR h 10 mR h 0 01 100 mSv h Dose Accuracy 50 5 6 Clock Calendar Type Built in 24 hour clock 4 year calendar including leap year 1 minute battery backup then reset Precision 3 s day at 25 deg C 30 s day over full operating temperature range 5 7 Data storage Type 8 kB CMOS Nonvolatile Memory Capacity 256 Alarm Events including time date 256 Dose Data Records Stor...

Страница 38: ... Nickel Metal Hydride or 1 2 V Ni Cd Nickel Cadmium Operation Time Typically 200 hours of monitoring at 25 oC no backlight with 2 0 Ah Ni MH 120 hours of monitoring at 25 oC no backlight with 1 1 Ah Ni Cd Charging Inside GR 100 via external 12 VDC Constant Current Float Charger Overnight charging charging status and full charge indicated on display External power adapter 12 VDC from 9 to 15 VDC Pr...

Страница 39: ... Weight 0 19 kg 0 42 lbs including battery 5 13 Environmental Operating Temperature Range 15 oC to 50 oC Storage Temperature Range 20 oC to 60 oC Protection Splash proof dust proof no immersing Non condensing Relative Humidity Less than 90 at 35oC RFI EMI Emission CE and FCC rules 47 CFR Part 15 for class A compliant 5 14 Accessories Standard Two AA Alkaline Batteries CD ROM with Monitor100U Remot...

Страница 40: ...ptional 110 VAC 12 VDC Power Adapter for battery charging 220 VAC optional with cable Reference Source Cesium 137 0 25 µCi Rechargeable Nickel Cadmium Battery Rechargeable Nickel Metal Hydride Battery SAIC Exploranium Proprietary Page 36 Revision Date November 2004 ...

Страница 41: ...nnel has a low gain Continue with the measurement Return to the nearest service center for repair High counts Unit is in high radiation area when the background is being updated Gamma channel is noisy Go to an area without any radiation sources Return to the nearest service center for repair Battery overloaded Wrong battery Short circuit in the unit Change battery Return to the nearest service cen...

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