Mirion Technologies GEM-5 User Manual

Gamma exit contamination monitor

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GEM-5

Gamma Exit

Contamination Monitor

User's Manual

MAN-GEM5 Rev.01

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Page 1 GEM-5 Gamma Exit Contamination Monitor User’s Manual MAN-GEM5 Rev.01...
Page 2 Copyright 2017, Mirion Technologies (Canberra CA) Ltd. All rights reserved. The material in this document, including all information, pictures, graphics and text, is the property of Mirion Technologies (Canberra CA) Ltd. and is protected by Canadian copyright laws and international copyright conventions.
Page 3: Table Of Contents
Ctrl+F10 – Factory Setup Menu ....................17 F1 – Model Selection ......................18 F2 – Operation Configuration................... 22 F3 – Badge Configuration ....................25 F4 – Access Configuration ....................28 F6 – Access Level Settings ....................37 Gem-5 User’s Manual...
Page 4 F1 – Place in Krypton Mode Service ..................100 F2 – Test Menu .......................... 100 F3 – Setup Menu ........................101 F1 – Common Values ......................103 F2 – Wait Timeouts ....................... 106 F3 – Detection Zones ......................111 Gem-5 User’s Manual...
Page 5 F11 – Alarm Test Instructions ..................193 6. Diagnostics/Maintenance ............194 Using Test Screens ........................194 F2 – Test Menu ........................... 196 F1 – Rate Meter ........................197 F2 – HVPS Meter ........................200 F3 – Counter Test ........................201 Gem-5 User’s Manual...
Page 6 F5 – Contamination Check Results Printout ................. 259 F6 – Calibration Source List Printout ..................265 F7 – All Setup Values Printout ....................267 F8 – Calibration Check Results Printout ................268 A. Algorithms .................. 270 Probability Theory ........................270 Gem-5 User’s Manual...
Page 7 Voice Files ..........................304 Creating Wave Files ........................307 C. Special Information ..............309 Alarm Test vs. Occupant Alarm ....................309 Case 1 ............................. 309 Case 2 ............................. 310 Initial Setup ..........................310 Self Shielding ......................... 310 Gem-5 User’s Manual...
Page 8 Typical Efficiencies ....................... 325 Detector Types ........................326 Mechanical ..........................326 Handling ..........................326 Cabinet........................... 326 Dimensions ..........................326 Weights ..........................326 Electronics ..........................326 Computer ..........................326 Display Screen ........................327 Environmental ..........................327 Pollution Degree ........................327 Gem-5 User’s Manual...
Page 9 Gamma Detector Digital Board (SCN 816102) .............. 342 Gamma Detector Analog Board (SCN 816107) ............. 343 Sensor Boards ..........................344 Four-Relay Sensor Board (SCN 816540)................344 Serial Bus Terminator Board (SCN 816546)................349 Sensors ............................349 Approach Sensor ........................350 Gem-5 User’s Manual...
Page 10 Barrier Arms Option ........................371 Installation ..........................371 Adjustment/Maintenance ....................... 371 DC Motor Controller for Access Control Options ..............371 Inputs and Outputs ......................... 372 Switches..........................373 Overview ........................373 LED Functionality ......................374 Operation ..........................374 Overview ........................374 viii Gem-5 User’s Manual...
Page 11 Barrier Arms ..........................379 Spare Parts for up to Five Years Operation ................379 O. Block Diagrams – Standard Models ......... 380 GEM-5 General Arrangement ....................381 GEM-5 Serial ..........................383 P. Block Diagrams – With Options ..........385 GEM-5W93 General Arrangement .................... 387 GEM-5W100 General Arrangement ..................
Page 12 How to Use WebRemote ......................409 WebRemote Layout and Controls ..................410 Index ....................417 Gem-5 User’s Manual...
Page 13: Preface
Preface All Mirion Technologies (Canberra CA) Ltd. contamination monitors are based on similar detectors, sensors, counting and control electronics and computer hardware. Most changes in the modular hardware have evolved from technological enhancements, which were then incorporated into all newly manufactured monitors.
Page 14 Chapter 7, Retrieving Information. Chapter 6, Diagnostics/Maintenance, gives help on maintaining the unit by discussing the Test menus and how to handle Faults by troubleshooting. Chapter 7, Retrieving Information, describes how to obtain useful information and data from the monitor. Gem-5 User’s Manual...
Page 15 This includes such information as the number and location of detectors and sensors, detailed descriptions of the Mirion Technologies (Canberra CA) Ltd. proprietary electronic boards, along with instructions for installation and routine maintenance.
Page 16 Product complies with appropriate current EU directives. Product complies with appropriate current FCC UL/CSA 61010-1 directives. Mechanical Safety: Caution - risk of injury due to moving parts. Personal Safety: Protective gear is required. Environmental Safety: Caution surfaces hot/cold. Manufacturer's Address Gem-5 User’s Manual...
Page 17: Introduction
1. Introduction Thank you for ordering the Mirion Technologies (Canberra CA) Ltd. GEM™-5 Gamma Exit Monitor. The GEM-5 gamma exit monitor provides power plants and nuclear facilities the very latest gamma detection capability to monitor pedestrians leaving areas of potential radioactive contamination. Operation of the monitor is straightforward and reliability is assured with both audible and visual aids to support monitoring activities.
Page 18 A bootable Setup USB Flash Memory Stick is exclusively used as the Bootable Flash Memory device. Obtain the serial number of the unit in question and contact your local Mirion Technologies (Canberra CA) Ltd.Service affiliate for more information. Gem-5 User’s Manual...
Page 19: Features
Features Features Use the following list and table to understand the features of the GEM-5 Gamma Exit Monitor: • “Best in Industry” sensitivity • Eight identical large plastic scintillators − Three per side − One top/bottom • 25 mm (1 in.) lead shielding •...
Page 20: Safety First
The monitor should also be disconnected from the facility’s AC supply. CAUTION: Mirion Technologies (Canberra CA) Ltd. recommends that a safety ladder be used every time access to any roof-mounted AC cords, plugs and sockets is required...
Page 21: Over-Current Protection
Over-current Protection Specific Information for GEM-5 Starting from 2015 GEM-5 monitors are equipped with the over-current protection fuses built into the IEC320 power entry module (2 x 4A). On older units no over- current protection was provided. In this case it must be provided by the customer's power distribution system.
Page 22: Installation - First Use Of System
Care should also be taken in elevated background conditions to ensure that appropriate Self Shielding Factors are applied during alarm testing. GEM-5 units are normally placed at the facility exit location in areas that are typically at natural background radiation levels (to maximize throughput and sensitivity), but can operate in higher exposure rate environments.
Page 23: Installation
The lead ingots are painted to make them non-toxic. However, the use of gloves is recommended as a further precaution. For the standard single layer of lead that comes with the GEM-5, a total of 27 lead ingots (SCN 816034) are installed behind the gamma scintillation detectors on both the front and back walls of the unit.
Page 24 If ordered, the optional bottom and top ingot bricks (nine in each of two possible layers) can be installed anytime (SCN 816087 GEM-5 Top Pan/Extra Lead Kit, SCN 7062330 GEM-5 Bottom Extra Lead Kit respectively). Figure 3 Slide lower lead ingots through center slot (left) and remaining ingots through the upper slot to complete the installation (right).
Page 25: Ramps
(three each side) supplied. Use the leveling bolts to ensure that the ramps are level (Figure 5). Carefully replace the floor pan. Figure 4 GEM-5 Floor pan in place (left) and floor pan removed (right). Figure 5 GEM-5 Ramp (left) and Ramp Installation (right)
Page 26: Relocation
Chapter 2 Installation - First Use of System Relocation Mirion Technologies (Canberra CA) Ltd. Contamination Monitors are designed to operate in a fixed location, but can be quickly relocated as requirements change. WARNING: Do not move the monitor without first shutting...
Page 27: Display Screen
Review of Hardware Figure 6 GEM-5 Computer Access Door Display Screen The video display is a high resolution (1024 x 768) ~233.9 mm (10.4 in.) color LCD display screen, integrated in top of unit (secondary or remote display kits are optionally available for entry side).
Page 28: Electrical Connections
Connection on page 12, Relay Connections on page 12, I/O Connections on page 12. AC Electrical Mains Connection On GEM-5 models, the customer’s incoming power is connected to a standard 3 prong IEC 320 power inlet connector, which is located on the top panel. The connector has a built in 2 x4A fuses (starting from 2015) and EMI filter.
Page 29 Carrier Board, which in turn supplies +12 VDC power to the Detector and Sensor Boards and +3.3 VDC power to the LCD panel. • A stationary Mirion Technologies (Canberra CA) Ltd. logo appears while the software initializes. When the initializing sequence is complete, the audio circuits should sound a "fanfare"...
Page 30 Test menus and how to handle Faults by troubleshooting. Where applicable (e.g. not possible with any detector in a GEM-5 except for the bottom detector since it is the only one which is easily accessible), visually check the Detector Board for randomly flashing LEDs, which indicate that the board and detector is functioning.
Page 31: Model Selection And Configuration
It also loads the detector errors history file d_status.df, which restores previously known detector errors. To show that the program is running a stationary Mirion Technologies (Canberra CA) Ltd. logo is displayed centered on screen until the “Please Wait” (F3 - Setup, F11 - Instructions, F8 - Messages, Please Wait setting) message is shown.
Page 32 F3 – Setup, F6 – Operation Voice & Screen: set Voice Choice, set Default Language (operation screens). d. F3 – Setup, F7 – Data Log: set Data Log File Type (“ANSI” or “UNICODE”), set Clean & Contaminated Results. Gem-5 User’s Manual...
Page 33: Ctrl+F10 - Factory Setup Menu
Access Levels to different personnel via passwords. On some screens, Ctrl-F10 will reveal settings which are used in other models. Gem-5 User’s Manual...
Page 34: F1 - Model Selection
If this file is not found on startup, then the program immediately displays the F1 - Model Selection screen to permit selection of the model. Pressing Ctrl+F10 when the main Service Menu is displayed also brings up the Model Selection screen. Gem-5 User’s Manual...
Page 35 “YES” and the Level 2 or 3 Password is set in the F6 – Access Level Settings screen. F6 (Ctrl+F6) loads default settings for the model currently selected. Ctrl+F7 restores settings, including Model, to values in effect when the screen was opened. Figure 9 Model Selection Screen Gem-5 User’s Manual...
Page 36 Chapter 2 Installation - First Use of System Line Items Model: Select the from the full range of Mirion Technologies (Canberra CA) Ltd. contamination monitors. NOTE: If the Model is changed all setup settings, including high voltage settings, background collection, and detector efficiency calibrations, are reset to factory default values for the selected model upon exiting this screen.
Page 37 The F4 – Access Configuration screen provides settings to map sensor terminal blocks to access control functions. Monitor Width ## cm: This is the portal opening width or inner width of a GEM-5. Range is 61 cm to 122 cm, (24” to 48”) default is (standard) 61 cm (24”). When set greater than 61 then “W##”...
Page 38: F2 - Operation Configuration
The Operation Configuration screen is model dependent. See Appendices for an explanation of these settings (if applicable). Figure 10 Operation Configuration Screen See the table below for comprehensive information. Table 2 Operation Sensor Configuration for GEM-5 Function Inputs Approach 1...
Page 39 “key”. It can be assigned one of the spare inputs. When Display Last Contaminated terminal is active, the slowly drifting Mirion Technologies (Canberra CA) Ltd.logo screen or Ready screen will show the last contaminated screen (already being automatically saved as a BMP for CRemote).
Page 40 Wait Lamp: This indicates that the occupant is to wait in the monitor during the Monitoring cycle for GEM-5 in one-step mode (cannot be chosen if Clean is set to this). Contaminated: This indicates that the occupant is contaminated.
Page 41: F3 - Badge Configuration
“253 ID 3 Auxiliary Sensor Board ASSY: D216696 SCN:816696” is the optional board for Argos-3, Argos-5 and GEM-5 Serial Bus models and is available only if Auxiliary Sensor Board Enabled is set to “YES” on the Model Selection screen (on page 18).
Page 42 The voice file SCAN.WAV (“Please scan your badge”) is played when the first body position sensor is triggered and REMEMBER.WAV (“Don’t forget your badge”) is played after monitoring is complete. [Scan Badge (COM1)] or [Scan Badge (COM3)] are serial communications badges set to 9600,8,N,1. Gem-5 User’s Manual...
Page 43 Range is 1 to 19, default 1. For “Scan Badge (Keyboard A scan with fewer leading digits (0 to Minimum Leading Digits Interface)” and “Enter ID 9) than this setting is rejected. (Keyboard Interface)” Badge Types. Range is 1 to 19, default 0. Gem-5 User’s Manual...
Page 44: F4 - Access Configuration
The term “Barrier” is used as a generic designation for doors and barrier arms. • If both Hot side and Cold side barriers are present then only one is allowed to be open at a time during normal operation. Gem-5 User’s Manual...
Page 45 “253 ID 3 Auxiliary Sensor Board ASSY: D216696 SCN:816696” is the optional board for Argos-3, Argos-5 and GEM-5 Serial Bus models and is available only if Auxiliary Sensor Board Enabled is set to “YES” on the Model Selection screen (on page 18).
Page 46 Hot and Cold side barrier closed signals are active and one or more of the position or occupied sensors are active. This occupied condition is cleared when either Hot or Cold barrier closed signal goes inactive and all the position and occupied sensors go inactive. Gem-5 User’s Manual...
Page 47 In addition, if Access Scanner – Input or Access Key – Input is assigned a terminal then it must be activated prior to monitoring even if it is not used to open the Hot Side barrier. Gem-5 User’s Manual...
Page 48 On Contaminated and Go Back screens the Hot Side barrier is opened and then Remove Badge is requested until it is removed. This setting applies when Hot Side Access Scanner – Input is set to “Badge Configuration”. This, in turn, requires Gem-5 User’s Manual...
Page 49 Fault. The sets an Out of Service Fault. Security Key – Input: Input intended for security person to open both barriers (same effect as Supervisor Security Access). This can also be used as an Emergency switch input. Gem-5 User’s Manual...
Page 50 Cold Side Security Key Open: Open a Cold Side Barrier when the Cold Side Security Key – Input is active. Cold Side to Hot Contaminated Open: Default is [Cold Side] to match previous behavior. Available when Cold to Hot is set to [Monitor]. Gem-5 User’s Manual...
Page 51 Reset – Output “None” “253 : TB06 OUT 6” “TB17 Spare 4 Latched” “253 : TB19 IN 9” Closed – Input “None” “253 : TB11 IN 10” Opened – Input Fault – Input “None” “253 : TB20 IN 11” Gem-5 User’s Manual...
Page 52 Open Specific Information for Barrier Arms A GEM-5 with Barrier Arms installed on both Hot and Cold sides can use the approach sensors to open the barrier arms. See Figure 13 or example settings (noting in particular the Cold to Hot, Access Scanner - Input and Open Barrier settings for both Hot and Cold Sides).
Page 53: F6 - Access Level Settings
Level 1 (return to service) access enables F1 – Place in Normal Service, F4 – Faults, F8 – Maintenance Log and F9 – Recent Event Log on the Service Menu. These are minimum screens required to return the monitor to service as shown in Figure 15. Gem-5 User’s Manual...
Page 54 Printout Menu, F8 – Maintenance Log and F9 – Recent Event Log. These are the screens required to set HV, establish the background, calibrate the detectors, and print the calibration results as shown in Figure 16. Figure 16 Typical Level 2 Access Service Menu Gem-5 User’s Manual...
Page 55 Version 7.08 or later, if Password Usage was “SERVICE” or “SETUP” then Password is copied to Level 1 Password, Level 2 Password and Level 3 Password. Enable Access Level Control is also set to “YES”. Gem-5 User’s Manual...
Page 56: F7 - Dosimeter Reader Configuration
Chapter 2 Installation - First Use of System F7 – Dosimeter Reader Configuration In older versions, the items in this screen were located in the F3 - Badge Configuration screen. Its settings are kept in the DOSIMETR.DF file. Figure 18 Dosimeter Reader Configuration Screen Gem-5 User’s Manual...
Page 57 Model Selection and Configuration Table 7 Dosimeter Configuration information Setting Choice Description Mirion Technologies (Canberra CA) Ltd. Dosicard “DOSICARD” Dosimeter Reader Type “LDM 2000” MPGi (Mirion Technologies) LDM 2000 Pass-By Data Exchange Dosimeter Reader “LMF” Saphymo LMF Dosimeter Reader “LDM 61”...
Page 58 Wait After DBR Complete settings. For DBR – DOSICARD details see DBR Flow Chart 704 060228.pdf (available from Mirion Technologies (Canberra CA) Ltd.upon request). Also, note that this does not check for terminals that are assigned to more than one function.
Page 59 Measurement in Progress” remains high for duration of CLEAN screen. − Exception for LMF is The Notify Measurement in Progress is set low 125 ms after start of CLEAN screen and is left low for remainder of sequence. Gem-5 User’s Manual...
Page 60 DBR Complete, and DBR Incomplete are also used. • F3 – Setup, F11 – Instructions, F5 – Contaminated, Remove Dosimeter, and F3 – Go Back, Remove Dosimeter, are also used when prompting for dosimeter to be removed. Gem-5 User’s Manual...
Page 61: F9 - Database Settings
(and to make it more readable). • Maximum Size of DB_INFO.LOG is in bytes. Oldest entries are removed when this size is exceeded. Default is 2,000,000 bytes. Gem-5 User’s Manual...
Page 62: F10 - Methodology Configuration
F10 – Methodology Configuration The Methodology Configuration screen allows the user to select the methodology option. Figure 20 Traditional Methodology Configuration Screen Line Items Methodology: “Traditional” (default) or “Bayesian”. Refer to Supplementary Bayesian Methodology User's Manual for more information. Gem-5 User’s Manual...
Page 63 (detection probability) 1-β : Range is [0] to [100] %. Default is [97.725] % (equivalent to Traditional K Beta default of [2.0]). (confidence interval probability) 1-γ: Range is [0] to [100] %. Default is [97.725]%. Note that this affects Confidence Interval Upper Limit (Ān(ul)) used for the Clean/Contaminated decision. Gem-5 User’s Manual...
Page 64: Principle Of Operation
Chapter 3 Principle of Operation 3. Principle of Operation This section describes the operation of the Mirion Technologies (Canberra CA) Ltd. Contamination Monitors, including considerations of alarm set points and background radiation. Each monitor is a self-contained PC-based system with the ability to maintain monitoring operation while performing self-diagnostics at the electronic board level.
Page 65: Normal Service
Normal Service In Normal Service the contamination monitors provide monitoring of personnel within the parameters established previously using the various Service Menu screens. Normal Service for GEM-5 monitors comprises the following basic operating modes: 1. Background Initialization; 2. Background Collection;...
Page 66 The monitor continuously checks for proper operation of all components and can report operational status to a remote computer loaded with the optional CRemote software over a LAN communication network. It can also transfer results data to a file or a printer (if connected). Gem-5 User’s Manual...
Page 67 Normal Service Figure 22 Logic Flow Diagram Showing the Complete Monitoring Cycle Gem-5 User’s Manual...
Page 68: Background Initialization/Collection Mode
During Background Update mode the monitor displays a screen-saver that shows a slowly drifting Mirion Technologies (Canberra CA) Ltd. logo as shown below.
Page 69: Ready Mode
(for example, it is using the default value) then no calibration date is shown. Gem-5 User’s Manual...
Page 70: Position Mode
Conditional Service (see F4 – Faults screen). POSITION Mode Note: In One-Step and Walk-Through modes, the GEM-5 does not check for body position (other than the Occupied sensor) so the unit goes directly to Monitor mode after the badge scan, if applicable.
Page 71: Monitor Mode
When all body position sensors are activated, the unit goes to Monitor mode. There is only one body position sensor on the GEM-5, i.e. the Body sensor. Figure 25 Audible and Visual Position Information is Given to the Occupant If the occupant fails to trigger all body position sensors within the Maximum Not In Position Time (default is 30 s) set in the F2 –...
Page 72 At the completion of the Position 2 monitoring cycle, the decision for contaminated or clean is given, as described above. Figure 26 Countdown is Both Audible and Visual Gem-5 User’s Manual...
Page 73 D:\MonitorProgram\DATALOG\ directory. This report provides all the data necessary to manually analyze and verify the results. These Results files are stored for a period established in the F6 – Printout screen and then they are erased. Gem-5 User’s Manual...
Page 74: Clean Mode
See F3 – Setup, F8 – Printout for the appropriate Auto Save Occupant Check Results setting. If the High Count Time Fault on the F4 – Out of Service Causes screen on page 141 is triggered, it will appear on this screen as appropriate. Gem-5 User’s Manual...
Page 75: Contaminated Mode
High Alarm Activity (or High Alarm Emission Rate) value has been exceeded (see the F2 – (Zone) Settings screen and the High Contamination Alarm (or High Emission Rate Alarm) has been enabled (see F1 – Common Values). Gem-5 User’s Manual...
Page 76 Operation Configuration – Resume Contaminated setting. (Also shown when Wait for Read Dosimeter is shown) • For LDM61 the Contaminated Screen displays F3 – Setup, F11 – Instructions, F5 – Contaminated – Wait for Read Dosimeter while dosimeter is being read. Gem-5 User’s Manual...
Page 77 CRemote instead of all available RESULT…TXT & BMP files. If the High Count Time Fault on the F4 – Out of Service Causes screen on page 141 is triggered, it will appear on this screen as appropriate. Gem-5 User’s Manual...
Page 78: Out Of Service Mode
“Settings Changed” and “Exit Program”. One line is appended to the Service Data Log for each service event. When the file reaches its maximum size, the oldest data is deleted. The Service Data Log can be enabled in the F7 – Data Log screen. Gem-5 User’s Manual...
Page 79: Monitor Out Of Service
Initializing Background screen, with # s) on bottom line of the screen, until there is enough time in the average (see High Count Time Fault on the F4 – Out of Service Causes screen). Gem-5 User’s Manual...
Page 80: High Background Out Of Service
Figure 31 High Background Out of Service Screen If set to “AUTO” recovery mode then the monitor returns to service when the fault is no longer detected. Otherwise background collection continues same as Monitor Out of Service. Gem-5 User’s Manual...
Page 81: Excessive Background Out Of Service
The detector contamination check is skipped if Detector Contaminated is set to “NO” in the F4 – Out of Service Causes screen. Gem-5 User’s Manual...
Page 82: Krypton Mode
F3 – Setup Menu, F1 – Common Values screen the monitor can be placed in either F1 – Normal Service or Shift+F1 – Krypton Mode Service from the Service Menu depending on the background conditions. In Krypton Mode Service (“High Background”): • The Alpha channels are monitored using their normal settings. Gem-5 User’s Manual...
Page 83 History and adds a “Suggest Normal Service” event to the Service Data Log. The Self Shield Factor set in the F2 – (Zone) Settings screen used for any occupant clean/contaminated monitoring decision is recorded in the F5 – Contamination Check Results Printout file. Gem-5 User’s Manual...
Page 84 Chapter 3 Principle of Operation Figure 34 The Krypton Mode High Background Out of Service Screen Figure 35 The Krypton Mode Normal Background Out of Service Screen Gem-5 User’s Manual...
Page 85: Alarm Test
“Verification Test (detector count rate trend)” used to confirm that each detector continues to give the same net rate as previously measured. Each GEM-5 monitor includes an Alarm Test facility for quick verification that the system alarms at the release limit setting. A small key (SCN 503413) is inserted into...
Page 86 High Alarm Activity (or High Alarm Emission Rate) value has been exceeded and the High Contamination Alarm (or High Emission Rate Alarm) has been enabled (see F1 – Common Values). Figure 36 Alarm Test Countdown Figure 37 Alarm Test Contaminated Gem-5 User’s Manual...
Page 87 “worst case”. This requires that the Alarm Test Type be set to “Coverage Test” in the F7 – Alarm Test Settings on page 133. And/or (gamma) Item(s), Gamma Body, (Gamma) Shoe, and/or (Gamma) Head Gem-5 User’s Manual...
Page 88: Unit Setup
Chapter 4 Unit Setup 4. Unit Setup Most of the parameters to be set up in the software are discussed in the chapters Parameters Definition on page 93, Diagnostics/Maintenance on page 194 or Retrieving Information on page 236. However, the menu items needed to initially set up the monitor are discussed in this chapter.
Page 89 Gamma scintillation detectors as well as tests appropriate self shield factors for various operating modes. In the case of various gate and barrier options, the F3 – Test Auxiliary Sensor Board and F7 – Barrier Exerciser choices appear. Figure 40 Additional Test Menu Showing Special Tests Gem-5 User’s Manual...
Page 90: F9 - Plateau Plot
Chapter 4 Unit Setup F9 – Plateau Plot The Plateau Plot screen (Figure 41) allows graphing the counrate of individual detectors as the function of detector high voltage; the resulting graph is traditionally called Plateu Plot. In addition to generating a plateau plot, this screen may also be used to adjust the high voltage for individual detectors that later is applied to in normal operation.
Page 91 “Beta Discriminator” is not used for this detector (set to 0) d. 4 row “Alpha Discriminator” is not used for this detector (set to 0) e. 5 row has Gamma Discriminator f. 6 row has Dwell Time g. 7 row has Maximum HV (supported by board) Gem-5 User’s Manual...
Page 92 Chapter 4 Unit Setup h. 8 row “Board ID” has board ID number i. 9 and 10 rows have data column labels j. 11 row to end has plateau plot data (HV set & read and Gamma Count Rate) Line Items High Voltage: Sets the high voltage for normal operation.
Page 93 At higher biases, a point is reached where multiple pulsing occurs due to high PMT noise. Beyond this point, the count rate rapidly escalates. CAUTION: Do not over bias the detector as PMT could be damaged by excessive current. Gem-5 User’s Manual...
Page 94: Hv Setting For Gamma Scintillation Detectors
Chapter 4 Unit Setup HV Setting for Gamma Scintillation Detectors The default high voltage for gamma scintillation detectors is 650 V; this ensures some counts from the detector but does not guarantee optimum performance. Higher voltages result in higher PMT gain. The typical operating voltage is usually between 500V and 1000V.
Page 95 DISC3_01.CSV. These CSV files can be opened by any spreadsheet program such as Microsoft Excel. Some useful hints for viewing CSV files using Excel are provided in the appendix, Viewing Datalog Files with Excel, on page 303. Gem-5 User’s Manual...
Page 96 Chapter 4 Unit Setup The DISC#_###.CSV files containing the Discriminator Plot data contains the following: a. 1 row “Discriminator Plot”, Collect Time b. 2 row has channel number, 3 column for Gamma description c. 3 row “Detector”, detector number d. 4 row has High Voltage and ULD e.
Page 97 Maximum Rate and Scale Type settings for any detectors in Conditional Service are still changeable so that one may use these to possibly correct a fault that might have taken the detector Out of Service in the first place. Gem-5 User’s Manual...
Page 98: F1 - Optimize Gamma Hv
Chapter 4 Unit Setup Plot Data Collect and Dwell Time: Respective times are shown underneath the plot. Board ID: Shows the type of Detector Board being examined for that zone. Discriminator Voltage and Count Rate and DAC (value): Respective times are shown underneath the plot.
Page 99 2. Press F2 = Collect All Gamma Detectors (this will collect background on all detectors in the unit). 3. Wait for collection to finish, ~8.3 minutes at default settings. 4. Press F10 = Show Next Graph to view Source Data screen. Gem-5 User’s Manual...
Page 100 Chapter 4 Unit Setup Figure 44 The Optimize Gamma HV Screen, Source Data 5. Select the Source that will be used during the procedure. Use the + and - keys to scan through the list of available sources (the list may be edited see: F9 – Edit Calibration Source List on page 137).
Page 101 (relatively stable level of countrate where further increase of HV will not realize in significant increase of countrate). 12. Press F10 – Show Next Graph to view Efficiency graph. Figure 46 The Optimize Gamma HV Screen, Efficiency Gem-5 User’s Manual...
Page 102 Chapter 4 Unit Setup 13. Press F10 – Show Next Graph to View Monitor Count Time. Figure 47 The Optimize Gamma HV Screen, Monitor Time 14. Confirm that voltage selected in step 11 corresponds to minimum count time. 15. Repeat steps 10 to 14, for each Gamma detector. Results are put into a CSV file in the D:\MonitorProgram\Datalog directory, in a file with file name OptimizeGammaHV##.CSV where ## is the detector or zone number.
Page 103 Status area shows: “Discriminator XXXX V” “ULD XXXX V”. “Source Used <source data>”. These indicate the conditions under which the data was acquired. • When collecting HV for PMT based detectors a count rate going ≥ Maximum Rate does not stop collection. Gem-5 User’s Manual...
Page 104: Calibration Requirements For Contamination Monitors
Chapter 4 Unit Setup Calibration Requirements for Contamination Monitors GEM-5 monitors are manufactured to strict tolerances. In addition, all units are calibrated at the factory for normal background conditions. Although the GEM-5 monitor will work reasonably well with the factory calibration settings, it is...
Page 105: Calibrate Process
F8 – Discriminator Plot screen (on page 78). Gem-5 User’s Manual...
Page 106 Chapter 4 Unit Setup − Set High Voltage Levels – The factory default high voltage for Gamma detectors is 650 V but this is not necessarily the “optimum” voltage setting. The settings should be reviewed and adjusted if required using the F1 –...
Page 107 Time” or “Zero Counts” faults due to the efficiency being out of range. Intent is for these zones to be recalibrated before leaving the Calibration screen. This can be further automated using Shift+F1 = Auto Calibration Collection. Gem-5 User’s Manual...
Page 108: Factory Default Calibration
If it is not possible to perform a full calibration as described above, it may be acceptable, though not recommended, to use factory default efficiencies since all Mirion Technologies (Canberra CA) Ltd. detectors respond within a statistically tight range of efficiency values. Factory Defaults are based on a large sampling of detectors calibrated against sources traceable to NIST.
Page 109: Parameters Definition
Mirion Technologies (Canberra CA) Ltd. Service affiliate. The USB or PS/2 type keyboard port is normally only accessed by a key lock and thus is not accessible to unauthorized personnel who do not have the appropriate key.
Page 110 Chapter 5 Parameters Definition The Service Menu Structure table displays the full Service Menu structure. Use the Table of Contents at the beginning of this manual as appropriate to locate the explanation of each menu item. Table 8 Service Menu Structure Service Menu Submenu A Submenu B...
Page 111 F7 – System Status (Access Level 2) F6 – Printout Menu (Access Level 2) F1 – Monitor History (Access Level 2) F2 – Service History (Access Level 2) F3 – Calibration (Access Level 2) F4 – Calibration Data (Access Level 2) Gem-5 User’s Manual...
Page 112 Chapter 5 Parameters Definition Table 8 Service Menu Structure Service Menu Submenu A Submenu B F5 – Contamination Check Results (Access Level 2) F6 – Calibration Source List (Access Level 2) F7 – All Setup Values (Access Level 2) F8 – Calibration Check Results (Access Level 2) F7 –...
Page 113: F1 - Place In Normal Service
Out of Service “High Count Time” fault will occur immediately. For additional information refer to refer to F3 – Setup, F3 – Detection Zones, F1 – Zone Configuration, Allow Bkg Reset set to “Yes” (Initalize background) starting on page 113. Gem-5 User’s Manual...
Page 114 Chapter 5 Parameters Definition Figure 48 Initializing the Detectors (Ramping High Voltage, etc.) Figure 49 Background Collection to Prepare System. If a fault is detected, the monitor enters Monitor Out of Service mode (on page 63). If the monitor completes background initialization and goes into normal service, then all components can be assumed to be functioning properly.
Page 115: F1 - Place In Conditional Service
F1 – Place in Conditional Service Note: GEM-5 models have at least one (and Optionally, two) layer(s) of lead surrounding the detectors, which helps reduce the ambient background, however, personnel moving around the monitors can contribute to fluctuations in background (a rule of thumb used in these situations is that one person can provide the shielding of roughly 25 mm or 1”...
Page 116: F1 - Place In No Database Conditional Service
Chapter 5 Parameters Definition If the Monitor is restarted in this condition the Service Menu with only the greyed out “F1 Place in…Service” and reason is shown. Press Esc to go through password level to see the other options on the Service Menu (refer to Access Level Settings on page 37).
Page 117: F3 - Setup Menu
The Setup Menu functions are as follows. Function Keys All Setup menu screens have a common “look and feel”. The active function keys are shown in the top right-hand corner with a brief description of the effect if the key is pressed. Gem-5 User’s Manual...
Page 118 Chapter 5 Parameters Definition The arrow keys are used to move around the screen, selecting the line item for change. The +, -, Ctrl +, Ctrl -, and Ctrl+E keys are used to change the value of the selected item. When entering characters for a text entry (blue boxes), the last character typed may be deleted using the Backspace key.
Page 119: F1 - Common Values
Note: The following characters * \ | : " . < > / and ? cannot be used in the Monitor ID and Location ID fields because they may be used as folder names by CRemote. Gem-5 User’s Manual...
Page 120 Chapter 5 Parameters Definition In addition the “,” (comma) character cannot be used in these fields since it would affect the number of columns when imported into a spreadsheet or database (Monitor ID, Location ID, and Serial Number are combined and placed in the first column of all Datalog CSV files).
Page 121 Background Change notifications are cancelled. Third, if a High Background condition is detected on one or more zones then all Background Change notifications are cancelled. Numeric Notation: Choices are “Engineering” (default) and “Scientific”. See Table 24 on page 318 for examples. Gem-5 User’s Manual...
Page 122: F2 - Wait Timeouts
Configuration) Background Average Period then the monitor will not be able to leave the Initialize background screen. Measurement Collect Time: Range is 0.125 s to 99 s. Default is 0.125s for GEM-5 in walkthrough mode, otherwise its 0.5 s. This determines how often the...
Page 123 Default is 0.25 s while in the “Walkthrough” mode and “0.5 s” while in the “One-Step” mode. Otherwise its 1 s without barriers and 0 s with barriers. The short time allows the GEM-5 to be immediately available for the next person to monitor.
Page 124 Chapter 5 Parameters Definition During Occupied Sensor Hold Time While Positioning: The occupant is assumed to be present in the monitor this is to give the occupant time to position or turn around (where applicable) without triggering the “Monitoring not complete, please re-monitor!”...
Page 125 If continuous monitoring causes this time to be exceeded, then Ready mode and Position mode are pre-empted to permit “Initialize Background” to be performed. A person already monitoring in Monitoring mode is allowed to finish. Range 60 s to 3600 s, default 900 s (15 minutes). Gem-5 User’s Manual...
Page 126 This will trigger the Go Back / Remove Badge sequence if badge is inserted instead of attempting to close Hot side barrier and return to background collecting (slowly drifting Mirion Technologies (Canberra CA) Ltd. logo screen (see F4 – Access Configuration, Contaminated Go Back Option on page 28).
Page 127: F3 - Detection Zones
On screens where Zone(s) can be selected the zone number is displayed in the top right corner. For detector zones, the description that appears on Monitor Zone Status and various printouts is shown to the left of the zone number. Gem-5 User’s Manual...
Page 128 (release alarm level) and calibration source ID, as well as the high, excessive, and low background count alarm rates. On the GEM-5, all detectors belong to one group, i.e. the Gamma Body group.
Page 129: F1 - Zone Configuration
When a setting is set to “Individual” it is expected that Alarm configuration will be performed using the (Zone) Settings screen, hence no discrepancies exist. Figure 54 The Setup Zone Configuration Screen Gem-5 User’s Manual...
Page 130 Chapter 5 Parameters Definition Line Items Detector Section Alarm sets the role of individual detector sections (singles) during monitoring. The choices are identical to those for sum zone alarm. If using the “Yes” choice causes a large increase in count time review the zone information on the F6 –...
Page 131 Maximum due to a low T term is an Initializing Background forced. “No” setting prevents background over K Delta value from resetting the Background Average. It also hides F4 = Show/Hide ±K∆ on the Background History and Background Trend screens. Gem-5 User’s Manual...
Page 132: F2 - (Zone) Settings
Chapter 5 Parameters Definition Bkg Reset Level +/- (K Delta): This statistical term determines the change to the background count rate that will cause the background algorithm to discard the running average-smoothed background value and move immediately to a new higher or lower value when a step change in rate has occurred.
Page 133 F6 = Set Factory Default: loads the default value for the selected item. Ctrl+F6 = Set All Factory Defaults: loads default values for all line items on the current screen. Affects currently selected zone and channel (Alpha, Beta, and Gamma) only. Gem-5 User’s Manual...
Page 134 Chapter 5 Parameters Definition Ctrl+F7 = Recall Previous Settings: reloads the settings in effect when the screen was opened. Affects currently selected zone and channel (Alpha, Beta, and Gamma) only. Ctrl+Home, Home, PgDn, PgUp, End, and Ctrl+End: these keys select the first, first in the group, next, previous, last in the group, or last zone, respectively.
Page 135 127 but applies to the selected zone only. This allows the source that is intended to be used for alarm testing to be specified. It is optional for Alarm Test Type settings of “Alarm Test” and “Coverage Test” but is required for “Verification Test”. Gem-5 User’s Manual...
Page 136 Chapter 5 Parameters Definition Alarm Test Source Dimension/Date: This is the same item as described in the F5 – Group Settings screen on page 127 but applies to the selected zone only. This item is used to convert Alarm Test Source activity values expressed in Bq/cm² (or dpm/cm²...
Page 137: F3 - Calibration
Calibration Gamma Detector/ Sum Zone Pair screen (Figure 56). Efficiency calibrations for individual detector sections (singles) and for sum zones performed using this screen. Please refer to Calibrate on page 89 for the detector calibration procedure. Figure 56 Detector/Zone Calibration Screen Gem-5 User’s Manual...
Page 138 Chapter 5 Parameters Definition There is an individual calibration screen for each zone, including singles, pairs, triples, etc. The title shows the zone use (foot, body, head etc.) as well as, in the case of sum zones, the detector sections that make up the zone currently selected. Its location is indicated on the inset layout diagram by hatch marking.
Page 139 Source Used shows blank, the seven remaining line items are set to zero, and the text for the Calibration line item changes to “Factory Default Efficiency” (single detector section) or “Derived Efficiency” (sum zone). No Date and Time is indicated in this case. Gem-5 User’s Manual...
Page 140 Chapter 5 Parameters Definition F8 = Do Calibration Check: This is used to periodically check a particular zone. Place a source in the normal position by the detector and press F8. One can then compare to the actual calibration currently assigned to that zone. Shift+F8 = Auto Calibration Check: follows the same principle as Shift+F1 = Auto Calibration Collection above.
Page 141 (i.e. shielding) some of the background radiation. Only in rare circumstances would this setting be changed from the factory default (1.0). See Footnote 13 on page 215 for the special case for gamma detectors. Gem-5 User’s Manual...
Page 142 Chapter 5 Parameters Definition Current Bkg Time/Rate: The rate is the background average rate that will be used to calculate the net count rate during calibration. It can be updated by pressing F2. The Bkg Time is the averaging time used to calculate the Bkg Rate; it indicates the quality of the background average and should be near the Background Average Period (default is 300 seconds) set in the F2 –...
Page 143: Shift+F3 - Calibration Settings
Selecting Shift-F3 from the F3 – Detection Zones menu brings up the Calibration Settings screen (Figure 57) to support automatic calibration count time calculations and the automatic calibration sequence. The calibration count time calculation uses Equation 5 on page 136 for Verification Check count time calculation. Gem-5 User’s Manual...
Page 144 Chapter 5 Parameters Definition Figure 57 The Calibration Settings Screen Count Time Calculation Settings Count Time Minimum/Maximum: These items set the allowable range for the counting time during a calibration collection, as described in the Calibration screen. The defaults are 1 s (Minimum) and 120 s (Maximum). The activity for the selected calibration source is multiplied by the previous zone efficiency to determine the Expected Count Rate.
Page 145: F5 - Group Settings
F2 – (Zone) Settings screen, or the F3 – Calibration screen. Conversely, values set in this screen and transferred to all zones in the group will override any values set previously in the F2 – (Zone) Settings screen, or the F3 – Calibration screen. Gem-5 User’s Manual...
Page 146 Chapter 5 Parameters Definition Function keys F1 through F11 (with the exception of F6 and F7 which are already in use and active) become active and their function is shown on the screen only when the corresponding value specified for the group (i.e. on this screen) is different from the current value in effect for at least one of the individual zones in the group.
Page 147: Shift+F5 - Global Settings
Note this is actually applied to Calibration Process setting. Calibration Distance: This is not available on this screen since the Calibration Distances for the GEM-5 need to be individually set per detector on F3 –Calibration screen on page 121. Shift+F5 – Global Settings The Global Settings screen (Figure 59) settings are applied to Group Settings and in the case of Calibration Source, to Optimize Gamma HV settings.
Page 148 Chapter 5 Parameters Definition When individual setting is different from global setting one or more of the following appear: F1 = Alarm Activity or F1 = Alarm Emission Rate F1 = Cold Alarm Activity or F1 = Cold Alarm Emission Rate F11 = High Alarm Activity or F11 = High Alarm Emission Rate F3 = Alarm Test Source F9 = Calibration Source...
Page 149: F7 - Alarm Test Settings
F7 – Alarm Test Settings There are three types: “Alarm Test”, “Coverage Test” and “Verification Test”. Figure 60 Alarm Test Settings Screen - Alarm Test (Detector Only) Figure 61 Alarm Test Settings Screen - Coverage Test (Detector & Sum Zones) Gem-5 User’s Manual...
Page 150 Chapter 5 Parameters Definition Figure 62 Alarm Test Settings Screen - Verification Test (Detector Count Rate Trend) Alarm Test Type: As also described in Alarm Test on page 69. Alarm Test (detector only) This is used to test detector zones only and is the default …Alarm Test Type. It is intended to check that all detectors alarm with the Alarm Test Source chosen in the F2 –...
Page 151 = Source Activity (Bq) V = Visible Area of Source (in fraction form, nominally 1 or 100%) The statistical error of the background corrected activity for the check source is set equal to Allowed Range of the known source activity: Gem-5 User’s Manual...
Page 152 Chapter 5 Parameters Definition Equation 3 Statistical error of the background corrected activity σ σ ⋅ ⋅ ß ε Where: = Confidence (nominally 1.96 or 95%) ß E = Allowed Range (in fraction form, nominally 0.2 or 20%) σ = error in source + background σ...
Page 153: F9 - Edit Calibration Source List
CALIB.INI file is shipped with each unit to use as a template. Prior to being of any practical value, it would have to be modified for the actual sources in use at the facility using an ASCII text editor such as Windows Notepad. Following editing, Gem-5 User’s Manual...
Page 154 Chapter 5 Parameters Definition the file properties should be changed to Read Only so that a program re-installation or upgrade will not overwrite it. The CALIB.INI source list is used only when the control program cannot find the CALIBSRC.DF file, or when CALIB.INI is loaded using the Ctrl+F6 key. See example below: ;CALIB.INI factory default initialization file for calib source list ;s/n,isotope,1/2life(Yr),Activity(Bq),Date(YY,MM,DD),Xcm,Ycm,Type,Emission/s...
Page 155 The value of 0 for either dimension is a special case that forces the source area visible to 100%. On exiting this screen (Esc) or switching to a different source (PgDn or PgUp) the larger dimension is forced into the Gem-5 User’s Manual...
Page 156 Chapter 5 Parameters Definition Length (first) dimension. This corresponds to the way the detector dimensions are stored (see F3 - Calibration screen). Certificate Year/Month/Day: The date of the original source calibration as recorded on the source certificate. By selecting a year < 1900 these line items are blanked, resulting in a calibration that does not correct for source decay.
Page 157: F4 - Out Of Service Causes
The line items that appear on the screen will reflect the configurable options applicable to the particular model. Items greyed out are only available when applicable to the model or option as set in the Ctrl+F10 – Factory Setup Menu screens. Gem-5 User’s Manual...
Page 158 Chapter 5 Parameters Definition Figure 64 The Out of Service Causes Screen Fixed Line Items [Yes] The following conditions always cause an Out of Service condition. It is possible, however, to return a unit to service with (detector) Board Fault(s) by putting those detectors in “Determining Faults”, as explained on page 223.
Page 159 : The choices are “YES”, “NO”, and “AUTO” (default). During background updates, the count rate is checked against the Excessive Background Rate set in the (Zone) Settings screen on page 116. This condition could result from exceedingly high background levels, electronic noise in the preamplifier, incorrect Gem-5 User’s Manual...
Page 160 Chapter 5 Parameters Definition discriminator adjustment, or contamination by a radioactive particle. Setting this item to AUTO allows the monitor to return to service automatically if the background subsequently drops below the alarm setting. Refer to High Background Rate Settings and Strategy on page 279 for a full discussion of this and related items.
Page 161 Due for Recalibration: The choices are “YES”, “NO” (default) and “WARN”. A “YES” setting will take the unit out of service if the recalibration date/time has passed (see below). The “Calibrated” date for all detection zones should be reviewed Gem-5 User’s Manual...
Page 162 Chapter 5 Parameters Definition using the F3 – Calibration screen on page 121 and calibrated if necessary, following which the Due For Recalibration date/time on this screen should be reset to the next scheduled time. A setting of “WARN” leaves the unit in service and the Due For Recalibration instruction is displayed during Alarm Tests.
Page 163 Wait for Auto Barrier Reset time (as set in the F2 – Wait Timeouts screen on page 106) then initiates a reset sequence, then waits for Closed or Opened signal as well as Not Fault signal before clearing the barrier’s faults and returning to service. Gem-5 User’s Manual...
Page 164: F5 - Configuration
Chapter 5 Parameters Definition Cold Side Barrier Failed To Close: Choices are “AUTO” (default) or “YES”. If “AUTO” then fault is auto reset when Cold Side Closed terminal becomes active or if its a Motor Control fault and Wait for Auto Barrier Reset has elapsed. This is a timeout fault.
Page 165 Countdown screen does not draw digits when count time is less than 1 s. • Body position sensors are ignored once monitoring commences; counting will finish and give a clean or contaminated decision even if the occupant has left. Gem-5 User’s Manual...
Page 166 Chapter 5 Parameters Definition This item is forced to Two-Step if Two Step Only is set to “YES” on the F1 – Model Selection screen. The contamination level at which the monitor can be set to accurately alarm is different for each of these modes. If the operating mode (Monitor Steps) is changed then the alarm release level and self shielding factor settings on the F2 –...
Page 167: F6 - Operation Voice & Screen
Instructions for the creation of alternative voice (WAV) files are included in Creating Wave Files on page 307. The sound effect files, such as BEEP.WAV, are located in the Sounds directory D:\MonitorProgram\SOUNDS. There should be no need to change these files. A “NO/NC” = “Normally Open/Normally Closed” Gem-5 User’s Manual...
Page 168 Chapter 5 Parameters Definition listing of the standard sound files is provided in the appendix, Operating Files and Directory Structure, on page 304. The voice instruction files, such as CLEAN.WAV, are located in the voice directories "D:\MonitorProgram\VOICE#" where # is 1 to 8, thus providing for alternative voice or language selections, as discussed below.
Page 169 Voice Choice: Voice Choice (1 to 8) is used to select the directory (VOICE#) for voice files. This setting can be used in conjunction with the Operation Instruction Menu to provide Operation screens in different languages, as discussed above. This Gem-5 User’s Manual...
Page 170 Chapter 5 Parameters Definition item can be changed on this screen only if Voice Select (next item) is “Fixed”. The system validates D:\MonitorProgram\VOICE# folders by checking that the D:\MonitorProgram\VOICE# folder exists and contains at least one WAV file. If no file exists in that particular folder, that Voice Choice # is not shown as a selection choice.
Page 171: F7 - Data Log
These datalog files may be analyzed off-line by transferring them to a network server over a LAN connection or by copying them to a USB compatible memory device. Refer to the F9 – Data Transfer (Network) Setup on page 174 for details. Gem-5 User’s Manual...
Page 172 Chapter 5 Parameters Definition Figure 68 The Data Log Screen Data files are stored on the hard drive in the directory D:\MonitorProgram\DATALOG. The file format is normally Comma Separated Value (CSV), which is suitable for spreadsheets such as Excel, Lotus, etc. Some useful hints for viewing Data Log files using Excel are provided in Viewing Datalog Files with Excel on page 303.
Page 173 Alternatively, in Excel 2003 (not available in Excel 2007) set Number, Category, Date, Locale (location) to “International (ISO)” and choose the date as shown in Figure 70. Column D will now show all available Time Date information. Gem-5 User’s Manual...
Page 174 Chapter 5 Parameters Definition Figure 71 Selecting the Locale Table 9 Datalog files Maintained by the Control Program Name Description Default ALARMTST[*][*] Alarm Test Log “File” .CSV SERVICE.CSV Service Data Log “File” M_EVENT[*][*] .CSV Event Totals Data Log “File” BKGND[*][*] .CSV Background Trend Data Log “File (Sum Only)”...
Page 175 Columns Wizard (which requires similar choices). One can also try setting Separator Type [Tab]. Figure 72 Excel Text Import Wizard settings – Step 1 of 3 Figure 73 Excel Text Import Wizard settings – Step 2 of 3 Gem-5 User’s Manual...
Page 176 Chapter 5 Parameters Definition Separator Type: Choice of “Tab” or “Comma” (default). Applied to new files only. For existing files, the first row is examined and the separator found is applied to rows being appended. Using “Tab” when Data Log File Type is UNICODE, it results in files, which are easier import into Excel without needing the Text Import Wizard (Excel defaults the separator type to [Tab] for UNICODE files).
Page 177 F6 – Monitor Zone Status screen. If a zone number is not applicable for the configuration then that column is skipped in the data log. Contaminated [Print], [None] are saved to RESULT YYYYMMDDHHMMSS DL C.TXT file. Verification Test trend [Print], [None] are saved to RESULT YYYYMMDDHHMMSS DL ?.TXT file. Gem-5 User’s Manual...
Page 178: Alarm Test Data Log
Chapter 5 Parameters Definition Alarm Test Data Log The Alarm Test Data Log (filename ALARMTST[*][*].CSV) records when alarm tests were performed and which zones were tested successfully (i.e. alarmed). The test is started when the Alarm Test key switch is switched from “NORMAL” to “ALARM TEST”...
Page 179 +12V Fault NO,YES √ √ √ Badge Reader NO,YES,AUTO The monitor can be placed in service for 1 day from the time the fault is cleared without regenerating this particular fault in order to perform the alarm test. Gem-5 User’s Manual...
Page 180: Events Data Log
Chapter 5 Parameters Definition Table 10 Faults logged by SERVICE.CSV file Fault logged in Manual Out of Service Auto Clear SERVICE.CSV Clear Causes √ √ AUTO,YES Suggest Krypton Mode Service √ √ Suggest Normal Service AUTO,YES √ √ √ Cold Side Barrier Fault AUTO,YES √...
Page 181: Background Trend Data Log
Gamma Bkg (Average Rate cps) • s (Gamma Bkg Time) • Var (Gamma Bkg Variance) • Var Ratio (Gamma Bkg Variance Ratio) • N (Gamma Background N) • Detectors (Gamma Detectors) • cm² (Monitor Gamma Detector Total Area) Gem-5 User’s Manual...
Page 182: Contaminated Results Data Log
Chapter 5 Parameters Definition • Rate Units Note that Gamma is sum of all gamma detectors. The Background Trend Data Log is set to “File (All Zones)”, the Background Trend Data Log (filename bkgnd.csv) provides a history of background count rates for each zone.
Page 183: Clean & Contaminated Results Data Log
The data column headings include Gamma Bkg 1, Gamma Bkg 2, etc. Each subsequent row of data contains the measured background collect time (sec) followed by the total counts for each detector (there are no sum zones logged in this Gem-5 User’s Manual...
Page 184: Calibration Trend Log
Chapter 5 Parameters Definition file) during the background collect time. The (s) column can be used to check whether the background collect time is as expected (default is 5.0 s), based on the time set in the F2 – Wait Timeouts screen. Additional columns shown in the data log raw_bkg.csv file are Carrier board readings “+5V”, “+12V”, “-12V”, “°C”;...
Page 185: F8 - Printout
Note that this setting is also used for the following files: • RECENT.LOG (type of existing file will override setting) • MAINTAIN.LOG (type of existing file will override setting) Gem-5 User’s Manual...
Page 186 Chapter 5 Parameters Definition • DISC*.CSV (F2 – Test, F8 – Discriminator Plot data) • PLAT*.CSV (F2 – Test, F9 – Plateau Plot data) • RESULT*.CSV (Verification Test Result data) • CALIB*CAL.CSV (Calibration Result data) • CALIB*CHK.CSV (Calibration Check Result data) •...
Page 187 The details of the file contents are as follows: • row, “Calibration Results” or “Calibration Check Results”, 2 row blank, row Mirion Technologies (Canberra CA) Ltd. model version, 4 blank, 5 row Monitor ID, Location ID, Serial Number, 6 row blank, 7...
Page 188 Chapter 5 Parameters Definition • column Net Rate • column Bkg Time • column Bkg Rate • column Self Shield • column Gross Rate • column Live Seconds • column Distance • column HV • column DV • column ULD (if applicable) Weight? •...
Page 189 Alarm Test Source ID • column Alarm Test Source Activity • column Efficiency • column Expected Count Rate for alarm test source • column Lower Limit Count Rate • column Upper Limit Count Rate • column Background (Average) Count Rate Gem-5 User’s Manual...
Page 190: F9 - Data Transfer (Network) Setup
Chapter 5 Parameters Definition • column Time in Background Average Count Rate • column Self Shield Factor applied • column Test count (1=initial test, 2-5 = retests) • column True (measured) Time • column Live Time • column (measured) Count •...
Page 191 CRemote application to receive status information and data files from multiple units. These applications may be purchased from Mirion Technologies (Canberra CA) Ltd. Refer to the CRemote manual for additional details.
Page 192 Chapter 5 Parameters Definition As an alternative to the central computer for data collection, data files can be transferred instead to a mapped network drive at a preset time every day (when “Send Data Log, Method, Mapped Drive – Daily is chosen) or at the next opportunity (when “Send Data Log, Method Mapped Drive –...
Page 193 “Mapped Drive – Daily” to enable file transfer to a network drive on a daily basis. “Mapped Drive – Next Opportunity” should be used if a Data Log file that is to be sent is changed then it will be done at the next background update. Gem-5 User’s Manual...
Page 194 Chapter 5 Parameters Definition When “TCP/IP (UDP packets)” is selected as the Method, status updates are sent to the central history computer at the same regular intervals (Period) set for Send Status above. The following additional items are displayed for configuration: IP Address: Specifies the IP Address of the machine running CRemote.
Page 195 When the Send Data Log Method is set to either “TCP/IP (UDP packets)”, “Mapped Drive – Daily” or “Mapped Drive – Next Opportunity”, the screen expands to enable transfer settings for individual Data Log files (*.csv), Discriminator and Plateau Plot Gem-5 User’s Manual...
Page 196 The contamination monitor maintains up to nine Data Log (*.CSV) files as configured in the F7 – Data Log screen. Only seven of these apply to the GEM-5. LOG files: Choices are “No”, “Move” and “Copy” (default). Select “Copy” to copy the Log files (MAINTAIN.LOG , RECENT.LOG and ERROR.LOG) from the...
Page 197: F11 - (Operation) Instruction Menu
Service (F7). There is an additional Messages (F8) screen for text that overlays other operation screens. In addition, Banners (F10) and Alarm Test (F11) may be available. UNICODE European accented characters can be entered using Alt- numeric keystroke combinations as per (see that section for other character types). Gem-5 User’s Manual...
Page 198 Chapter 5 Parameters Definition Figure 78 The Operation Instruction Menu Screen Press the appropriate function key to access the individual Instruction screens. The text for each Operation screen (e.g. CLEAN) is stored in the corresponding INST*.DF file (e.g. INSTCLEA.DF) located in the D:\MonitorProgram\SETTINGS directory.
Page 199: F1 - Ready Instructions
Figure 79 The Ready Instructions Screen. Line Items Request Access appears for use when Ctrl+F10 Factory Setup, F4 – Access Configuration screen on page 28, Hot Side, Access Key and/or Access Scanner are assigned a terminal. Gem-5 User’s Manual...
Page 200: Shift+F1 - Background Instructions
Chapter 5 Parameters Definition Shift+F1 – Background Instructions This is intended so that the background collection screen can show instructions instead of just the scrolling logo as people walk up to the monitor. Figure 80 The Background Instructions Screen Settings for screen displayed while background is collected. By default, this is a scrolling logo on a black screen.
Page 201: F2 - Position Instructions
(and corresponding WAV files) change from “Stand in center” to “Face up against wall opposite display” and “Place your back to wall facing display”. Display Side and Sensor Side help identify the side relative to the LCD Display (and the Body-In Sensor side if filled in). Gem-5 User’s Manual...
Page 202: F3 - Go Back Instructions
Chapter 5 Parameters Definition F3 – Go Back Instructions This exists in the event that the reason for “Go Back” mode can be shown. The reasons are “Position Timeout’, “Background Change”, “Manual Stop”, or “Dosimeter Reader Fault”. An Out of Service Fault can also cause an aborted measurement.
Page 203: F4 - Clean Instructions
The following fields are displayed if the Dosimeter Reader Enabled is set to “Yes” on the Ctrl+F10 Factory Setup, F7 – Dosimeter Reader Configuration screen (on page 40). Insert Dosimeter Wait for Read DosimeterRemove Dosimeter Read Dosimeter Complete Read Dosimeter Incomplete Read Dosimeter Complete Dosimeter Reader Unavailable Gem-5 User’s Manual...
Page 204: F5 - Contaminated Instructions
Chapter 5 Parameters Definition F5 – Contaminated Instructions The fields on this screen are used to inform the occupant being monitored how to proceed if they are considered “Contaminated”. Figure 84 The Contaminated Instructions setup screen. Line Items High Contamination: The default text is “* High Contamination”. See High Contamination Alarm setting in the F1 –...
Page 205: F6 - Turn Instructions
F3 – Setup Menu F6 – Turn Instructions The Turn Instructions does not apply while operating in “One-Step” or “Walk- Through” modes. Figure 85 The Turn Instructions Screen Gem-5 User’s Manual...
Page 206: F7 - Out Of Service Instructions
Chapter 5 Parameters Definition F7 – Out of Service Instructions The fields on this screen are used to inform the operator how to proceed if monitor becomes “Out of Service”. Figure 86 The Out of Service Instructions Screen − − Excessive Bkg Out of Service Instruction: see F4 Out of Service Causes Background Update Timeout on page 141.
Page 207: F8 - Messages Instructions
Ctrl+F10 – Factory Setup, F9 – Database Settings screen. File Maintenance: The default is “File Maintenance”. It is shown at bottom of Background screen when F3 – Setup, F8 – Printout are being processed for Keep…Days (see F8 - Printout on page 169). Gem-5 User’s Manual...
Page 208: F10 - Banner(S) Instructions
Chapter 5 Parameters Definition F10 – Banner(s) Instructions The settings on this screen are used to enter the text displayed various banners used throughout the operation screens. Figure 88 The Banner Instructions Screen Line Items Normal Service, Default blank. Shown as banner at top of Ready, Position, Turn, Clean and Contaminated screens when in Normal Service.
Page 209: F11 - Alarm Test Instructions
Limit Exceeded reason is not set to ignore (see F1 – Common Values screen on page 103 and F7 – Alarm Test Settings screen on page 133). Decision Threshold setting is setting is shown when the Ctrl+F10 Factory Setup, F10 – Methodology Configuration – Methodology is set to “Bayesian” (on page 46). Gem-5 User’s Manual...
Page 210: Diagnostics/Maintenance
F4 – Faults screen, are designed to aid the technician performing diagnostic work. The F6 - Printout, F7 – All Setup Values Printout on page 267 is also useful (especially if one would like to involve your local Mirion Technologies (Canberra CA) Ltd. technical support affiliate). Simply e-mail the SETUP.TXT file for diagnostics purposes.
Page 211 F3 – Counter Test d. F4 – Amplifier Pulse Test e. F6 – Sensor Board Tests f. F7 – Timer Tests g. F10 – Detector Board ID h. F11 – Carrier Board Tests i. F12 – Background Trend Graph Gem-5 User’s Manual...
Page 212: F2 - Test Menu
Chapter 6 Diagnostics/Maintenance 2. Shift+F2 – Additional Tests Menu (see Figure 40 on page 73): a. F1 – Optimize Gamma HV b. F2 – Optimize Self Shield Factors 3. F4 – Faults 4. F8 – Maintenance Log 5. F9 – Recent Event Log F2 –...
Page 213: F1 - Rate Meter
(scintillation detector). This should be verified with a high voltage check (F2 – HVPS Meter on page 200) and a calibration or alarm test of the detector. Gem-5 User’s Manual...
Page 214 Chapter 6 Diagnostics/Maintenance The F1 – Rate Meter screen displays the detector number in the left-hand column, with the gross count and count rates in the adjacent columns. The count rates are also represented on a bar graph that employs a log scale. The initial log scale is from 1 cps to 100 cps.
Page 215 − column 2 is live time (s). − column 3 is Beta Counter (Channel 1) counts. − column 4 is Beta Counter rate (cps or cpm) (empty for GEM-5). − column 5 is Alpha Counter (Channel 2) counts (empty for GEM-5).
Page 216: F2 - Hvps Meter
Chapter 6 Diagnostics/Maintenance F2 – HVPS Meter The HVPS Meter screen (Figure 91) tests the HVPS, which is built into each Detector Board and supplies high voltage to its associated detector. HV settings for normal − operation are F1 Optimize Gamma HV procedure (on page 82) or on the −...
Page 217: F3 - Counter Test
The Error column shows zeros if the digital counting circuits are operating properly. The total number of pulses sent and the elapsed run time for the current test are shown at the top of the screen. Gem-5 User’s Manual...
Page 218: F4 - Amplifier Pulse Test
Chapter 6 Diagnostics/Maintenance To prevent an inappropriately large error being reported if the counter wraps around to zero (counts > 2 -1), the number of pulses sent is compared with the counts read and with (counts read + 2 ) at each update; only the smaller of these errors is used. The test requires approximately 5 minutes completing all 16 million counts (10 µs approximately per pulse plus screen update time) unless the test is terminated early.
Page 219 1 as grey “n/a”). In addition, Start Counter Test, Pulse Amplitude and Discriminator settings are hidden if no detectors use them for a given counter. Counters not available for a given board are show as “n/a”. Gem-5 User’s Manual...
Page 220: Specific Information For Bench Test Models Only
Chapter 6 Diagnostics/Maintenance Line Items Pulse Amplitude: Range is between 0 V - 2.5 V Discriminator: (Lower Level Discriminator; LLD) Range is between 0 V - 0.5 V ULD: (Upper Level Discriminator) Range is between 0 V - 5 V (default is 5 V). For further information on ULD and Discriminator, see F8 - Discriminator Plot on page 78.
Page 221: F6 - Sensor Board Tests
Each sensor/switch indication should turn green (= ON) when the associated device is activated, in sync with the corresponding red LED on the Sensor Board. The LEDs on the Sensor Board are generally more Gem-5 User’s Manual...
Page 222 1 to 8. Language indicates the Voice currently selected by the switch. Note: In general, only the sensors/relays, which are actually in used in a GEM-5, are displayed to test here. One can use CTRL+F10 to see others, however, this may be confusing since several other Mirion Technologies (Canberra CA) Ltd.
Page 223: F7 - Timer Tests
To prevent an inappropriately large error being reported if the counter wraps around to zero [counts > (2 -1)], the number of pulses sent is compared with the counts read and with [counts read + 2 ] at each update; only the smaller of these errors is used. Gem-5 User’s Manual...
Page 224: F10 - Detector Board Id
Chapter 6 Diagnostics/Maintenance Timer Accuracy Test: This test compares the Windows system timers and the Carrier Board timers. These timers are all crystal controlled. All clocks should agree within a few tenths of a second over several minutes. The Update Count item is the number of times the timer display was refreshed during the test.
Page 225: F11 - Carrier Board Tests
F2 – Test Menu Figure 96 The Detector Board ID Screen The detectors expected for the pertinent model (e.g. #1 to #8 for a GEM-5) are shown in white and all others are shown in grey. The first column (Det#) is the detector number queried, while the second column (Read) contains the number read back from the Detector Board.
Page 226 Chapter 6 Diagnostics/Maintenance Figure 97 The Carrier Board Tests Screen To accommodate different Carrier Boards, which might have differing software requirements or default settings, these boards have computer readable board identification (ID). The second column displays the Board ID as reported by the board.
Page 227 A third column appears in the table beside the “ID” and “Read” columns called “Rev”. This should help discern different revisions of the Carrier Board. Contact the Mirion Technologies (Canberra CA) Ltd. Service affiliate for details. Function Keys F3 = Play SINE.WAV: Plays sound file SINE.WAV as a test of the on-board sound system.
Page 228: F12 - Background Trend Graph
Chapter 6 Diagnostics/Maintenance F12 – Background Trend Graph The Background Trend Graph screen (Figure 98) is a dynamic version of the F3 – Background History screen (on page 242). The only difference is that background updates are performed and displayed in real time on the F12 –...
Page 229: Shift+F2 - Additional Test Menu
Refer to line item Self Shield Factor on the F2 – (Zone) Settings screen (on page 116) for a further discussion on the use of self shield factors. Gem-5 User’s Manual...
Page 230 Chapter 6 Diagnostics/Maintenance • The screen title shows “Optimize Self Shield (Gamma)” when there are Gamma detectors . • HV is turned on while on this screen. Function Keys The following keys are used to control the test: F1 = Collect Unshielded (Background) F2 = Collect Shielded (Occupied) F3 = Stop Collection Ctrl + F1 = Clear Unshielded...
Page 231: Procedure
Procedure Perform the following procedure: 1. Remove all Sources and occupants. Figure 99 The Optimize Self Shield Screen (Step 1) For gamma detectors, the range is 0 to 1.5 (default 1.0). Gem-5 User’s Manual...
Page 232 Chapter 6 Diagnostics/Maintenance 2. Press F1 = Collect Unshielded. Unshielded Collection counts down remaining seconds. Figure 100 The Optimize Self Shield Screen (Step 2) 3. Wait for collection to finish, i.e. Unshielded Collection = final collection time stamp. Figure 101 The Optimize Self Shield Screen (Step 3)
Page 233 Unshielded Collection time. c. 3 row has the Shielded Collection time. d. Remainder of file contains columns for Zone, Unshielded Count Rate, Shielded Count Rate, Self Shield Factor. Note that only zones that support the Counter Type are present. Gem-5 User’s Manual...
Page 234: F3 - Test Auxiliary Sensor Board
Chapter 6 Diagnostics/Maintenance 7. Review results to confirm that the proposed Self Shield Factors are valid and not merely statistical aberrations. Zones that are geometrically similar should have very similar factors. See Footnote 13 on page 215 for the special case for gamma detectors.
Page 235: F7 - Barrier Exerciser
F6 = TB06 OUT 6 Cold Side Reset: toggles “ON” and “OFF”. F7 – Barrier Exerciser Use the Barrier Exerciser screen (Figure 104) to “exercise” any of the electric barriers installed on the entrance, exit, or both. Settings are kept in TST_BE.DF file. Gem-5 User’s Manual...
Page 236 Chapter 6 Diagnostics/Maintenance Figure 104 Barrier Exerciser Screen Selectable Line Items Cycles sets how many open close cycles should be done. Default is 1. Maximum is 1,000,000. It can be edited via the Ctrl+E = Edit function. Barrier Opened Time sets how long barrier is kept open before closing it again. Barrier Closed Time set how long barrier is kept closed before opening it again.
Page 237: F4 - Faults
Please refer to Determining Faults on page 223 for complete details on the use of this screen. Function Keys Note that keys F1, F3, and F5 are disabled if Conditional Service Allowed is set to 0 days (effectively not allowed) on the F4 – Out of Service Causes screen (on page 141). Gem-5 User’s Manual...
Page 238 Chapter 6 Diagnostics/Maintenance F1 = Place Detector / Sum Zone in Conditional Service: The intent of this feature is to allow a monitor to return to service with some detectors missing or failed while waiting for a replacement detector. A detection zone in Conditional Service is not considered when determining the Required Monitoring Time and is not used when making the Clean/ Contaminated decision during normal service.
Page 239: Determining Faults
YES on Blue: Fault and set to not take the unit out of service if faulted. YES on Red: Fault and set to take unit out of service if faulted. YES on Yellow: Masked Fault and set to take unit out of service (see F1 below). Gem-5 User’s Manual...
Page 240 Chapter 6 Diagnostics/Maintenance YES on Magenta: Fault, and set to WARN or AUTO for unit out of service if faulted. The fault status of all detectors in the unit is provided in the color-coded inset diagram on the right-hand side of the screen (see table below). The currently selected zone is identified by cross-hatching.
Page 241: Failure To Return To Service
This is where the cable problem or Detector Board short is located. The cable is likely pinched or the connector is shorted. Replace the defective cable, clean and/or reseat the connector, or replace/repair the Detector Board as required. Gem-5 User’s Manual...
Page 242 Chapter 6 Diagnostics/Maintenance If the replacement of the cable(s) does not solve the problem the Terminator Board may be missing, not plugged in correctly, or malfunctioning. The detectors at the beginning of the serial bus may be visible and working correctly, but more distant detectors from the computer would not work.
Page 243 Table 14 Status Area of Faults Screen Column 1 Column 2 Column 3 Carrier Board Database Cold side barrier Sensor Board DBR badge reader Hot side barrier Auxiliary UPS ON Sensor Board Suggest Krypton / Background update Normal mode timeout Security Supervisor Access Gem-5 User’s Manual...
Page 244: Troubleshooting Guide
Chapter 6 Diagnostics/Maintenance Table 14 Status Area of Faults Screen Column 1 Column 2 Column 3 Conditional Service Hot Side Security Key Access Alarm Test Due Cold Side Security Key Access Temperature Voltages +12 Volt Troubleshooting Guide Table 15 shows a system-troubleshooting guide. Table 15 Troubleshooting Guide Fault Error...
Page 245 • Replace Detector Board • Detector Board • Replace Detector HV Out of Range 2%Full Scale (DAC vs ADC) failure Board • HV overload • Disconnect PMT HV cable, if the fault disappears, replace PMT and/or HV divider Gem-5 User’s Manual...
Page 246 Chapter 6 Diagnostics/Maintenance Table 15 Troubleshooting Guide Fault Error Possible Causes • Check source of Live Time error 1. Extremely high count If LT = T – DT is < 0 then error rate extremely high count 2. Time counter failure rate;...
Page 247 Test Menu, F3 – Test Auxiliary Sensor Board and examine states of sensors. • Check polarity of wires to and from sensor(s) (if applicable). • Repair or replace sensor(s) as appropriate. • Check alignment of sensor transmitter and receiver Gem-5 User’s Manual...
Page 248 Chapter 6 Diagnostics/Maintenance Table 15 Troubleshooting Guide Fault Error Possible Causes • If set in software to Background Update Fault Door is left open Timeout longer than “AUTO” then “Maximum Time closing door will between Background automatically place Updates”. the monitor in service.
Page 249: F8 - Maintenance Log
Typed characters are inserted or overwritten at the cursor position, while the “Delete” key deletes the character under the cursor. The “Insert” key can be used to toggle between insert and overwrite modes. UNICODE European accented characters can Gem-5 User’s Manual...
Page 250: F9 - Recent Event Log
This log can also be viewed while the monitor is in service and the slowly drifting Mirion Technologies (Canberra CA) Ltd. logo screen (BACKGROUND Initialization/ Collection Mode on page 52). In this case, the F9 key toggles between the logo and...
Page 251 The In Service events are displayed in green. In Service events also indicate the type of Service (“Normal Service”, “Conditional Service” or “Krypton Mode Service”). In the case of occurrences of “Conditional Service” this will also apply if monitor is re-started with any zones detectors. Gem-5 User’s Manual...
Page 252: Retrieving Information
Chapter 7 Retrieving Information 7. Retrieving Information F5 – Information Menu The Information Menu, (Figure 108), provides access to several databases containing information related to monitoring results and performance. Its menu includes screens for displaying monitoring records and service records as well as graphical displays of the relationship between counting times, background count rates and alarm levels currently in effect for all detection zones.
Page 253 Position 1/ Position 2 Contaminated: the number of occupants who have a “Contaminated” result for monitoring in Position 1 and Position 2, respectively. Position 1(Monitor) Extended Count/ Position 2 (Recount) Extended Count: These counters display the number of times an extended count time was required to Gem-5 User’s Manual...
Page 254 Note: Position 2 normally only applieswhile operating in the Two-Step mode. For the GEM-5 (in One-Step or Walk-Through modes), Page 1 (overview) hides unused “Recount Clean”, “Recount Contaminated”, “Recount Extended Count”, and “Recount Abort”...
Page 255: F2 - Service History
“From...” the start date “To...” the current date and time. Note: All Faults with a non-zero value are shown even if then fault is not currently enabled. This information is kept in D:\Monitor Program\History\SERVE_HIST.DF. Gem-5 User’s Manual...
Page 256 Chapter 7 Retrieving Information Figure 111 Service History Screen (Page 1) Selected Report Items for Page 1 In Service: The number of times the monitor has been returned to service from the Service Menu, from an Alarm Test or from a control program restart (e.g. boot up). Out of Service: The number of times the monitor has detected a fault and automatically removed itself from service.
Page 257 Page 1. A detailed description of the failure causes (i.e. the column headings in) is provided elsewhere. The screen displays a maximum of 30 detector zones at a time (if applicable). If necessary, use the Page Up and Page Down keys to scroll up and down the list. Gem-5 User’s Manual...
Page 258: F3 - Background History
Chapter 7 Retrieving Information Figure 112 Service History Screen (page 2) Function Keys Ctrl+F4 = Clear History: At the discretion of your service support group, this history may be kept for the life of the unit or may be reset periodically using the Ctrl+F4 key, thus setting counters on both pages to zero and setting the “From...”...
Page 259 F1 to F8 keys as indicated at the bottom of the screen (the Keys displayed depend on the Methodology selected (see page 46)). This can result in less clutter and a faster refresh of the display if some items are not needed. Gem-5 User’s Manual...
Page 260 Chapter 7 Retrieving Information • Shift+Up arrow and Shift+Down Arrow control minimum value on vertical scale. • Space key auto scales and then toggles between auto vertical scale maximum value and both minimum and maximum values and is intended for higher gamma count rates.
Page 261 286 and reflects the current value of the yellow line on the graph. R defined in Background Rate Calculations on page 275 and reflects the current value of the brown line on the graph. T is defined on page 286. It indicates the quality of Gem-5 User’s Manual...
Page 262: F4 - Monitor Time Vs. Bkg Rate
Chapter 7 Retrieving Information the background average and should be near the Background Average Period (default is 300 seconds) set in the Wait Timeouts screen unless the background average has been recently initialized, for example due to a step change in background.
Page 263: Shift+F4 - Monitor Time Vs. Bkg Time
To access the Monitor Time vs. Background Time Sum Zone Screen, select the Shift+F4 - Monitor Time vs. Background Time menu item. The Graph Monitor Time − vs. Background Time aids in setting F1 Zone Configuration screen, Background Average Period. Gem-5 User’s Manual...
Page 264 Chapter 7 Retrieving Information Figure 115 The Monitor Time vs. Background Time Sum Zone Screen Note: CTRL+HOME brings up Dete ctor 1; CTRL + END brings up “All” (background) sum zone. The screen above is used to aid setting the Background Average Period. To determine the settings examine all zones to find maximum Background Average Period, such = ∞) shown that it is greater than the largest black circle (3 s more than T...
Page 265: F5 - Monitor Time Vs. Alarm Value
The assigned sequential Zone Number shown in small font at the top right of the screen is used consistently on service mode screens and printouts where information for individual zones is shown; this number is a convenient way of locating the zone of interest when switching between screens. Gem-5 User’s Manual...
Page 266: F6 - Monitor Zone Status
Chapter 7 Retrieving Information The text above the graph indicates the count times for the selected zone or detector. The sum zone will be the zone that is controlling the overall counting time for the monitor. The actual counting time used would be the time displayed for the Sum Zone All rounded up to the next highest integer number of seconds.
Page 267 (release limit), but not “Count Gamma Body In Two Steps”. The color of the font used in the data columns reflects whether Zone Alarm is set to NO (dark grey), CHECK (light grey), or YES (white) in the F2 – (Zone) Settings screen (on page 116). Gem-5 User’s Manual...
Page 268: F7 - System Status
Chapter 7 Retrieving Information F7 – System Status The System Status screen (Figure 118) displays the system parameters. Figure 118 The System Status Screen These values are also included (near end) of SETUP.TXT file (see F6 - Printout, F7 – All Setup Values Printout on page 267). •...
Page 269: F6 - Printout Menu
• Driver Version Windows 7: see Control Panel, Hardware and Sound, Device Manager, Mirion Technologies (Canberra CA) Ltd. CSB, CSB ISA Driver, Properties, Driver Windows XP: see My Computer, Properties, Hardware, Device Manager, Mirion Technologies (Canberra CA) Ltd. CSB, CSB ISA Driver, Properties, Driver.
Page 270 The Printout Menu reports include a two-line header. Line 1 contains the report title and the time it was created; Line 2 contains the Mirion Technologies (Canberra CA) Ltd. model number and software version, including compilation date; Line 3 records the Serial Number, Monitor ID and Location ID as entered in the Common Values screen.
Page 271: F1 - Monitor History Printout
DATALOG directory. In general, the F8 - Printout screen settings (on page 169) determine which check results files are saved and for how many days they are retained while the F9 - Data Transfer (Network) Setup screen settings (on page 174) determine which are transferred. Gem-5 User’s Manual...
Page 272: F2 - Service History Printout
Chapter 7 Retrieving Information F2 – Service History Printout The Service History printout contains exactly the same data as the F5 – Information Menu, F2 – Service History screen (on page 239). Both pages of screen text are combined on one printout, which includes the time period to which the data applies. The reported data are obtained from the file srv_hist.df.
Page 273: F3 - Calibration Printout
In general, the F8 - Printout screen settings (on page 169) determine which check results files are saved and for how many days they are retained while the F9 - Data Transfer (Network) Setup screen settings (on page 174) determine which are transferred. Gem-5 User’s Manual...
Page 274: F4 - Calibration Data Printout
Chapter 7 Retrieving Information F4 – Calibration Data Printout The Calibration Data Printout (Figure 123) complements the Calibration Printout described above. It provides: • High Voltage (HV) • Discriminator Voltage (DV) • Detector live time, • Gross count rate, • Background count rate and background averaging time, •...
Page 275: F5 - Contamination Check Results Printout
In general, the F8 - Printout screen settings (on page 169) determine which check results files are saved and for how many days they are retained while the F9 - Data Transfer (Network) Setup screen settings (on page 174) determine which are transferred. Gem-5 User’s Manual...
Page 276 Chapter 7 Retrieving Information Pressing F5 in F6 - Printout Menu displays the Contamination Check Results print preview screen for the most recent monitor cycle, whether “Clean” or “Contaminated”. The report has three sections per channel, labeled “Gamma Results” , “Gamma Alarm Test Point”, and “Gamma Statistics”.
Page 277 Alarm release limit, also called the alarm activity or alarm emission rate. High: High Activity; enabled when High Contamination Alarm in is set to “Enable (High Alarm Activity)” in the F1 – Common Values screen (on page 103). Gem-5 User’s Manual...
Page 278 Chapter 7 Retrieving Information Table 16 Column Label Description Term Description Eff: The zone efficiency. Result: The monitoring decision for the detection zone (“Clean”, “Contaminated”, “*Contam” or “Skipped”). Gamma Alarm Test Points Bkg (Rate) x Self Shield Factor Background averaging time for Bkg (Rate). ALS (Rate): “Alarm Level Setpoint”, defined in High:...
Page 279 Points on page 286. However, if conditions such as elevated background result in the Calculated (required) counting time for a zone exceeding the Maximum Monitor Time, then the UTP will be equal to the LLD for that zone. Gem-5 User’s Manual...
Page 280 Chapter 7 Retrieving Information The units used for reporting count rate, activity, and emission rate are included in the column headings. They are set in the F1 – Common Values screen. The third section of the printout, under the sub-heading Gamma Statistics, pertains to statistics related to the Gamma detectors.
Page 281: F6 - Calibration Source List Printout
If the certificate activity or certificate emission rate is entered as zero in the Calibration Source List, then that item is not included in the report. It will show backscatter, self absorption and source activity if present for a given source. Gem-5 User’s Manual...
Page 282 Chapter 7 Retrieving Information Activity values are differentiated from Emission Rate values by the units shown (e.g. Bq or α/s, ß/s or γ/s). Source activity and emission rate values can be derived or certificate based, as explained under F9 – Edit Calibration Source List on page 137. On the printout, source values include (ratio x units) to indicated they are derived, otherwise they are certificate values.
Page 283: F7 - All Setup Values Printout
The SETUP.TXT file skips the Shift+F2 – Additional Test section if it is not being used. An example All Setup Values Printout Preview screen is shown Figure 126 on page 268. For example, [Shift+F2 Additional Tests] [F1 Optimize HV] has [Typical] sections for [Gamma] as well as differences from typical. Gem-5 User’s Manual...
Page 284: F8 - Calibration Check Results Printout
Chapter 7 Retrieving Information Figure 126 The All Setup Values Printout Preview screen F8 – Calibration Check Results Printout The Calibration Check Results Printout is produced in two ways: 1. It is either produced by pressing F8 – Calibration Check Results from the F6 –...
Page 285 Gamma calibration check dates are scanned and shown at top of Gamma table as “Oldest Calibration Check” and “Newest Calibration Check”. If no zones were checked then “Not Checked’ is shown instead. Figure 127 The Calibration Check Results Printout Screen Gem-5 User’s Manual...
Page 286: Algorithms
Appendix A Algorithms A. Algorithms Probability Theory Counting Statistics Confidence Levels Radioactive decay is a randomly occurring event and must be described in statistical terms. Any count of radiation emitted is subject to statistical fluctuation due to the random nature of radioactive decay and due to the half-life of the radionuclide. The sampling distribution of a series of random radioactive events can be described as a Binomial distribution where the outcome of an event can be described as success or failure.
Page 287 − π σ tailed µ σ − : Two-tailed distribution Figure 128 µ In a special case when and using the substituition in Equation 11, the two- σ tailed probability can be written in the following form: Gem-5 User’s Manual...
Page 288 Appendix A Algorithms Equation 12 Two-Tailed Probability at x   ∫ ∫ − − −   erfc (12) − π π σ tailed   − … where erfc is the complementary error function defined in Equation 13: Equation 13 Complimentary Error Function ∞...
Page 289 Poisson distribution with means between 5.0 and 8.0. The one-tailed method showed higher than expected FAR. The same data using two-tailed intervals yielded the expected result. The addition of white noise did not affect the observations. Gem-5 User’s Manual...
Page 290: K Alpha - False Alarm Due To Background Rate
Appendix A Algorithms In counting statistics, one commonly uses a k factor to describe the desired confidence level (probability). By substituting a given k factor value for Equation 15 on page 273 for one-tailed distribution and in Equation 12 on page page 272 for two-tailed distribution, one can compute the onfidence levels.
Page 291: K Beta - Positive Alarm Due To Contamination
K Delta. For the default K Delta value of 4.0 (for the Beta/Gamma Channels) one would expect that only 1 in 16 thousand (1:16,000) background events would fall outside the defined interval. Background Rate Background Rate Calculations Gem-5 User’s Manual...
Page 292 Appendix A Algorithms When unit placed into service, a number of background collections (default is 5) are performed for each detector (and each detector section for Beta and Alpha/Beta detectors that have three independent counting sections) before the unit is ready for personnel monitoring.
Page 293: Background Variance Ratio
Note on derivation: In a Poisson distribution, the average number of counts per σ background interval, , should equal the variance in ; i.e., . Since it is the rates that are being calculated, the original terms can be expressed as rates, i.e., × σ = σ t × Gem-5 User’s Manual...
Page 294: Background Rate Reset
Appendix A Algorithms σ × Dividing through by yields: , and hence the variance ratio is zero. Thus the closer the Variance Ratio is to zero the closer the average is to a Poisson distribution. Values larger than one imply that a noise source such as low gas flow, electronic noise, or a fluctuating background, is affecting the background rate.
Page 295: High Background Rate Settings And Strategy
The choice of which action to take is specified in the F4 – Out of Service Causes screen (on page 141). The actual High Background Rate alarm (action) levels are specified in the F5 – Group Settings screen or in the F2 – (Zone) Settings screen. Gem-5 User’s Manual...
Page 296 Background Rate settings. Figure 130 shows the relationship between the different background levels and the confidence of alarm. Figure 130 Automatic Background Capability for Mirion Technologies (Canberra CA) Ltd. Monitors There are clearly many choices for handling high background rates using the settings in the F3 –...
Page 297 Figure 131 Information Display Under Elevated Background Rate Conditions; Clean At the higher set rate (Excessive Bkg Rate), the monitor will go Out of Service and display the following screen. Gem-5 User’s Manual...
Page 298: Low Background Rate Setting And Strategy
Appendix A Algorithms Figure 132 The Excessive Background Out of Service Screen 3. If the monitor location periodically experiences high background conditions due to the presence of Krypton or other radioactive gas, consider enabling Krypton Mode on both the F1 – Model Selection screen and the F1 – Common Values screen.
Page 299 Maximum Monitor Time (this affects the High Count Time fault decision) F3 – Setup Menu, F4 – Out of Service Causes • Low Bkg Rate • Zero Counts • Excessive Bkg Rate • High Bkg Rate • High Count Time Gem-5 User’s Manual...
Page 300: Measurement Variance Ratio Setting And Strategy (Background Change Tracking)
Appendix A Algorithms Note that the general intentions for the choices of “NO”, “YES”, “AUTO” and “WARN” (where applicable) are as follows: “NO”: Ignore fault. “YES”: Always take monitor Out of Service. “AUTO”: Take monitor Out of Service, but attempt to return to Service if fault condition clears.
Page 301: Alarm Settings And Strategy
The main consideration in determining the optimum counting time is the potential for error caused by statistical fluctuations in the measured count rates. Appropriate calculations are performed to obtain accurate clean/contaminated decisions within reliability parameters set in the F1 – Zone Configuration screen. Gem-5 User’s Manual...
Page 302: Alarm Trip Points
Appendix A Algorithms The net count rate for an occupant is obtained by subtracting the current effective background average from the measured gross count rate: Equation 24 Net Rate − × (24) Rate Gross Rate Background Rate Self Shield Factor The greatest component of statistical error is usually in the gross count rate due to the relatively short counting time;...
Page 303 Extend Count If Contaminated is enabled. When Extend Count If Contaminated is enabled, then the UTP is the higher of LLD and CTP. A net rate between ATP and CTP will extend the count time by the Gem-5 User’s Manual...
Page 304 Appendix A Algorithms Extend Count Time set in the F2 – Wait Timeouts screen. Following the extended count, the UTP reverts to the higher of LLD and ATP calculated for the total (normal plus extended) counting time, which is higher than the corresponding values at the end of the initial count time, because the error term is smaller.
Page 305: Counting Time Strategy
Ready, Position, etc.), as shown in Figure 131 on page 281 to indicate that the unit is operating with reduced alarm sensitivity, that is to say, the monitor is more likely to indicate a Clean result for contamination close to the alarm release limit. There may Gem-5 User’s Manual...
Page 306: Background False Alarm Rate (Far)
Appendix A Algorithms only be 1 or 2 detection zones at the LLD, while the remaining zones may be still at the ATP, i.e. providing full alarm sensitivity in those regions. Equation 30 Count Time with T term   ×...
Page 307: Confidence Of Alarm
− Expected efficiencies for Cs-137 are in the range 8-10% (default = 4%). 2. Efficiencies for the Sum Zones are calculated as per following formulas (E is the efficiency of the n detector calibrated as described above): Gem-5 User’s Manual...
Page 308 Appendix A Algorithms a. Pairs: − Pair 0: E = 0.79 * E + 0.85 * E − Pair 1: E = 0.65 * E + 0.65 * E − Pair 2: E = 0.65 * E + 0.65 * E −...
Page 309 Efficiency Calculation (and Derived Efficiencies) Figure 135 GEM-5 Efficienciy Map Gem-5 User’s Manual...
Page 310: Operating Files And Directory Structure
Appendix B Operating Files and Directory Structure B. Operating Files and Directory Structure Basic Structure In the standard package, the main program executable and associated Dynamic Link Library (DLL) files are stored in the D:\MonitorProgram\ folder. • MONITOR.exe • LOAD_DF.dll •...
Page 311: Custom Files
\CUSTOM\DLC_BEGIN4.TXT • \CUSTOM\DLC_BEGIN5.TXT • \CUSTOM\DLC_BEGIN6.TXT • \CUSTOM\DLC_BEGIN7.TXT • \CUSTOM\DLC_BEGIN8.TXT • \CUSTOM\DLC_BEGIN9.TXT • \CUSTOM\DLC_END.TXT • \CUSTOM\DLC_END0.TXT • \CUSTOM\DLC_END1.TXT • \CUSTOM\DLC_END2.TXT • \CUSTOM\DLC_END3.TXT • \CUSTOM\DLC_END4.TXT • \CUSTOM\DLC_END5.TXT • \CUSTOM\DLC_END6.TXT • \CUSTOM\DLC_END7.TXT • \CUSTOM\DLC_END8.TXT • \CUSTOM\DLC_END9.TXT • \CUSTOM\DLR_BEGIN.TXT • \CUSTOM\DLR_BEGIN0.TXT Gem-5 User’s Manual...
Page 312 Appendix B Operating Files and Directory Structure • \CUSTOM\DLR_BEGIN1.TXT • \CUSTOM\DLR_BEGIN2.TXT • \CUSTOM\DLR_BEGIN3.TXT • \CUSTOM\DLR_BEGIN4.TXT • \CUSTOM\DLR_BEGIN5.TXT • \CUSTOM\DLR_BEGIN6.TXT • \CUSTOM\DLR_BEGIN7.TXT • \CUSTOM\DLR_BEGIN8.TXT • \CUSTOM\DLR_BEGIN9.TXT • \CUSTOM\DLR_END.TXT • \CUSTOM\DLR_END0.TXT • \CUSTOM\DLR_END1.TXT • \CUSTOM\DLR_END2.TXT • \CUSTOM\DLR_END3.TXT • \CUSTOM\DLR_END4.TXT • \CUSTOM\DLR_END5.TXT • \CUSTOM\DLR_END6.TXT •...
Page 313: Driver Files
This includes the monitor ID, location ID, and serial number, the units for count rate and activity displays confidence limits for alarms and false alarms, and switches that affect counting strategy for the whole system, such as Zone Alarm. Gem-5 User’s Manual...
Page 314 Appendix B Operating Files and Directory Structure timeout.df The timeout.df file contains the settings for the F2 – Wait Timeouts screen. z_value.df The z_value.df file contains the detection zone parameter operation settings, as set in the F1 – Zone Configuration screen. These settings include the Zone Alarm and confidence (sigma) values that can be applied to all detection zones.
Page 315: Test Menu
These settings are accessed through the F4 – Amplifier Pulse Test screen. testrate.df The testrate.df file contains the dwell setting for the rate meter test. This setting is accessed through the F1 – Rate Meter screen. Gem-5 User’s Manual...
Page 316: Additional Test Menu
Appendix B Operating Files and Directory Structure testhvps.df The testhvps.df file contains the dwell setting for the HVPS meter test. This setting is accessed through the F2 – HVPS Meter screen. testsen.df The testsen.df file contains the dwell setting for the Sensor Board test. This setting is accessed through the F6 –...
Page 317: Factory Setup Menu
This data is viewed through the F1 – Monitor History screen, which also permits clearing the file and starting a new data set. The information can be printed using the F6 – Printout Menu. Gem-5 User’s Manual...
Page 318: Temporary Files
Appendix B Operating Files and Directory Structure srv_hist.df The Service History database (srv_hist.df file) contains a service record of the monitor over a set time. This database maintains a summary of overall service history, including out-of-service times, Alarm Tests, and Service Menu usage as well as a summary of detector faults for each detector individually.
Page 319: Viewing Datalog Files With Excel
Double click the separator bar between column B and column C to auto size width of column B. Resize other columns as necessary. Excel 2003 and older only support 256 columns whereas Excel 2007 can handle 16,384 columns. Gem-5 User’s Manual...
Page 320: Sound Files
Table 20 Sound Files are Located in the D:\MonitorProgram\SOUNDS Directory FILE CONTENTS \SOUNDS\BEEP.WAV Clock Tick for Count Down and Print Screen \SOUNDS\FSKALARM.WAV Frisker Alarm Sound (not needed for GEM-5) \SOUNDS\SANI.WAV Boot-up Fanfare \SOUNDS\SINE.WAV Test Master Volume on Carrier Board Tests Voice Files Table 21 lists the contents of the D:\MonitorProgram\VOICE# directory.
Page 321 Not normally supplied M_CONTAM.WAV Not normally supplied MOVEIN.WAV “Lean Closer” (1 position) MOVEIN2.WAV “Lean Back” position if applicable) NEXT.WAV “Next” OBJECT_I.WAV "Insert Object” OBJECT_O.WAV "Remove Object” OPENDOOR.WAV “Please Open Door” P_G5BAK.WAV “Please Place Your Back To Wall Facing Display” Gem-5 User’s Manual...
Page 322 Appendix B Operating Files and Directory Structure Table 21 Voice Files Can Be Customized for Choice of Language FILE CONTENTS P_G5CTR.WAV “Stand In Center” P_G5FWD.WAV “Please Face Up Against Wall Opposite Display” P_HDFT.WAV “Please Position Your Hands And Feet” POS_BAK.WAV “Please Place Your Back To The Detectors And Position Your Hands And Feet”...
Page 323: Creating Wave Files
\SOUNDS or \VOICE# directory. WAV files should be 30 seconds or less in length. The format for the WAV files is as follows (with settings currently used by Mirion Technologies (Canberra CA) Ltd. in Bold): Table 22 WAV File Settings...
Page 324 Appendix B Operating Files and Directory Structure Output as MONO, 16 kHz, 16 Bit. This makes the smallest WAV files that sound good in the monitors. To record a file start the recording in software, enunciate the message, stop recording. Set view to fit to window, use the cursor and a cut function to delete the non-message part before and after the message.
Page 325: Special Information
5. After doing an Alarm Test mode sequence with unexpected clean results, look in D:\MonitorProgram\DATALOG for RESULT yyyymmddhhmmss AT_.TXT files. Examine these files looking at the detectors that were expected to alarm to see why they did not (Skip flag, low gross rate, high background rate, etc.). Gem-5 User’s Manual...
Page 326: Case 2
Appendix C Special Information Case 2 Monitor Passes Alarm Test but Does Not Alarm for Occupant. 1. Check F3 – Setup, F3 – Detection Zones, F2 – Settings Self Shield Factor – Occupied. a. F2 – Test, F12 – Background Trend can assist in determining if self shielding is a problem.
Page 327: F7 - Demonstration Display Menu
F7 - Out of Service, and then adding additional overlays by toggling the space bar (to overlay High Background, Detector Contaminated, etc.), a variety of F11 – Operation Instruction Menu settings can be viewed. Gem-5 User’s Manual...
Page 328: F1 - Ready
Appendix C Special Information F1 – Ready For the READY screen, “High Count Time” message is one of the Space Key alternate screen. Last Calibration Time and Carrier board temperature are shown in lower right status area. Shift+F1 – Background Shift+F1 –...
Page 329: F7 - Out Of Service
The technique used is an internal state machine that simulates sensor inputs with specific sequence and delays. Also, note that in Demonstration mode, Calibration causes the system to calibrate to factory default efficiency. Gem-5 User’s Manual...
Page 330 Appendix C Special Information Also folders “DATALOG (Demonstration)”, “HISTORY (Demonstration)” and “SETTINGS (Demonstration)” are used to save settings and results as "%TMP%\DATALOG (Demonstration)", “%TMP%\HISTORY (Demonstration)", and “%TMP%\SETTINGS (Demonstration). If command line “/CSBID2” is also used then folders “%TMP%\DATALOG (Demonstration Id2)”, “%TMP%\HISTORY (Demonstration Id2)”...
Page 331 On the Initializing Background screen a “Please Leave” message may result. To recover, press F5 until a grey F5 shows and wait for slowly drifting Mirion Technologies (Canberra CA) Ltd. logo screen before selecting F5-3. An alternative is to set F3 – Setup, F2 – Wait Timeouts – Initialize Background: Update to less than 3 if F5-3 is to be selected on the Initializing Background screen.
Page 332: Simulator Mode
Appendix C Special Information Simulator Mode A simulator, which is similar to a regular monitor but contains no detectors or detector boards, is used for training. A pushbutton switch connected to the” Latch 2 In” sensor board input is used to request a Contaminated result. The word “Simulator”...
Page 333: Isotope Library
Co-57 0.744136 Th-228 1.912 Co-60 5.2714 Th-230 75,380 Cs-137 30.07 Tl-204 3.78 Fe-55 2.73 U-235 703,800,000 I-125 0.162637 U-238 4,768,800,000 I-129 15,700,000 W-185 0.2056 Mn-54 0.854556 Y-88 0.291998 Na-22 2.6088 Values shown are courtesy of PCNUDAT (http://www.nndc.bnl.gov/nndcscr/pc_prog/) Gem-5 User’s Manual...
Page 334: Further Information
Appendix E Further Information E. Further Information Numeric Notation This refers to the choices shown in the F3 – Setup, F1 – Common Values – Numeric Notation (on page 103); with “Engineering” as a default. “Scientific” is the second choice. See Table 24 for examples: Table 24 Numeric Notation Examples Engineering ≥...
Page 335: Special Character Codes
Alt+152 ÿ Alt+167 º Alt+133 à Alt+143 Å Alt+153 Ö Alt + 248 ° Alt+134 å Alt+144 É Alt+154 Ü Alt+135 ç Alt+145 æ Alt+160 á Alt+136 ê Alt+146 Æ Alt+161 í Alt+137 ë Alt+147 ô Alt+162 ó Gem-5 User’s Manual...
Page 336: Support For Non-Us Keyboards
Appendix E Further Information Note: A more general solution is to use the Character Map application in Windows. Go to Start | All Programs | Accessories | System Tools | Character Map and select the character required. See the bottom right hand side of the windows for the key combination as per the example in Figure 137.
Page 337 Task Bar Language option | Settings | Key Settings | Change Key Sequence and uncheck Switch Keyboard Layouts and Switch Input Languages. Refer to Figure 138 to Figure 141. Figure 138 Non-US Keyboard Windows Settings - Part 1 Figure 139 Non-US Keyboard Windows Settings - Part 2 Gem-5 User’s Manual...
Page 338 Appendix E Further Information Figure 140 Non-US Keyboard Windows Settings - Part 3 Figure 141 Non-US Keyboard Windows Settings - Part 4...
Page 339: Specifications - Standard Models
Specifications – Options appendix on page 329. The GEM-5 is the flagship model in Mirion Technologies (Canberra CA) Ltd.’s line of Gamma Exit Monitors. It provides power plants and nuclear facilities gamma detection capability to monitor pedestrians leaving areas of potential radioactive contamination.
Page 340: Operating Modes
Appendix F Specifications – Standard Models GEM-5W93, Gamma Exit Monitor, 1"Pb, 93cm inner width − same as standard GEM-5 (serial bus) except with inner width modified to 93 cm (36.6 in.) GEM-5W100, Gamma Exit Monitor, 1"Pb, 1 m inner width −...
Page 341: Occupant Specifications
Typical 4π efficiencies at different source/detector distances measured with a 60Co and then with a 137Cs radioactive point source placed in the center of the detector are specified in Table 26. Table 26 GEM-5 Efficiencies Side/Head Detector Foot Detector Radioactive...
Page 342: Detector Types
Appendix F Specifications – Standard Models Detector Types Table 27 GEM-5 Detectors Scintillator Detectors Scintillator (SCN 815436) Quantity Type Scintillation, Gamma Mechanical Handling • There are four leveling feet available. Cabinet Steel construction with rugged powder-coat finish for almost all surfaces other than the stainless steel base provides for ease of decontamination and minimum maintenance.
Page 343: Display Screen
220 V AC/50 Hz/1.0 A or 110 V AC/60 Hz/2.0 A mains 3 m (~10 ft) IEC standard cable (supplied; other cables are available; specify any special cable requirements; contact local Mirion Technologies (Canberra CA) Ltd. affiliate) Power Consumption •...
Page 344: Sensors
Appendix F Specifications – Standard Models Sensors The GEM-5 uses a combination of sensors to detect user movement and positioning on the monitor as shown in (the number of sensors used is indicated in brackets): Table 28 Sensors used in GEM-5...
Page 345: Specifications - Options
Units include reader and pertinent mounting hardware. Mirion Technologies (Canberra CA) Ltd. recommends sending a sample of customer’s ID card to factory to ensure compatibility. These ID Readers can be used with Sirius, GEM-5 and Cronos monitors. Facility uses: •...
Page 346: Magnetic Card Reader
Local Database Support Option The Local Database Support Option (SOFT-LDB) serves as a data repository for the Monitor program running on a supported Mirion Technologies (Canberra CA) Ltd. Contamination Monitor. It is based on Microsoft SQL 2014 Express Edition with Advanced Services (Version 129.00.30422000.8).
Page 347: Models
Local Database Support Option Note: Custom reports can be ordered from Mirion Technologies (Canberra CA) Ltd.. Contact your local Mirion Technologies (Canberra CA) Ltd. Service affiliate for details. Database tables can be made available by Mirion Technologies (Canberra CA) Ltd. for direct access to the SQL database. Contact your local Mirion Technologies (Canberra CA) Ltd.
Page 348: Source Calibration Fixture Options
SCN 816140 GEM-5 Calibration Fixture 1. Source holder only; source not included. 2. Fits standard 61 cm (24 in.) width GEM-5 only. 3. Spring-loaded expansion bars fit between the GEM-5 walls to hold source in place. Figure 144 GEM-5 Calibration Fixture...
Page 349: Exit Control
This is a motorized plastic/acrylic arm available for the entrance or the exit side (or both) of the monitor. CAUTION: Mirion Technologies (Canberra CA) Ltd. has made every attempt to reduce the number of places that may be deemed a so-called â€œpinch-pointâ€. However, there are some unobvious that could not be eliminated.
Page 350: Doors
Doors Electric Swing Door for GEM-5 Figure 146 Possible “pinch-point” location for the Electric Barrier Arm SCN 816115 GEM-5 Electric Auto Swing Door; Exit Only IPCAM212 Camera Factory installed network Camera Kit For GEM-5 (SCN 7062269). Figure 147 IPCAM212 for GEM-5...
Page 351: Entrance/Exit Ramps
• Other widths available up to 100 cm to match wider systems Layer of Lead Kit For Sides GEM5-2Pb 2nd Layer of 25 mm (1 in.) Lead Shielding for GEM-5 • Includes 54 lead ingot bricks for sides of GEM-5.
Page 352: Component Details - Standard Models
Note that no model uses all sensors. See the appendix, Specifications – Standard Models, on page 324 for details. The Frisker is available as an option on Argos-AB and Sirius-AB models. Sirius/GEM-5/Cronos does not use LED Boards. The GEM-5 is the only model with a “WAIT” annunciator.
Page 353: Detectors
The Mirion Technologies (Canberra CA) Ltd. large area gamma detectors used on the Argos-3/-5AB Zeus and the GEM-5 monitors (they are identical) are based on 2 in. thick plastic scintillators. Each detector is approximately 58.4 cm (23 in.) by 38.1 cm (15 in.) with a 22.9 cm (9 in.) by 5.1 cm (2.0 in.) cutout for the PMT and...
Page 354 Appendix H Component Details – Standard Models Table 29 System Board Address Designations Board Board Designation Address Carrier Board 1-55 Detectors 56-249 Not in use 250-254 Sensor Boards To accommodate future new board versions that might have differing software requirements, carrier boards have a computer readable model identification (Id). The Carrier Board model number can be determined from the Id displayed on the Carrier Board Test screen, which is accessed from the Test Menu, or from the markings stamped on the board, as shown in Table 30.
Page 355: Detector Boards
0.5 V for the discriminator in gamma counting circuits. The high-voltage power supply provides regulated positive voltage under software control. The actual value of the high voltage is measured and used to detect high voltage failures and for display purposes. Gem-5 User’s Manual...
Page 356: Board Settings
Appendix H Component Details – Standard Models The Detector Board communicates with the Carrier Board through the proprietary Detector Serial Interface bus via a 16-conductor ribbon cable. To avoid voltage losses across the long cable, the Detector Board generates regulated +1.5V, +3.3V and ±5 V power from the +12V serial bus power lines.
Page 357 Detector Boards Table 33 DIP Switch SW1 settings for Detector # Switch Setting (SW1-x) Detector # …and so on… Gem-5 User’s Manual...
Page 358: Gamma Detector Board (Scn 816112)
Note: When an external LED/Detector ID Board is used to set the detector number, all switches of SW1 should be in OFF position. This does not apply to the GEM-5 monitor, which does not use LED/Detector ID boards. Gamma Detector Board (SCN 816112) The Gamma Detector Board Assembly includes: •...
Page 359: Gamma Detector Analog Board (Scn 816107)
Analog Board and all control and feedback signals between Analog and Digital Boards; • J2: signal input connector (signal from the PMT HV Divider Board); • J3: HV output connector (HV to the PMT HV Divider Board). Gem-5 User’s Manual...
Page 360: Sensor Boards
Appendix H Component Details – Standard Models Sensor Boards The Sensor Board is connected to the 16-conductor Detector Serial Interface cable. It contains input connections for several sensors and switches, and outputs for annunciators (Fault, Ready, Wait, etc.) and relays. CAUTION: Remove power before (dis)connecting cables to or from the Sensor Board.
Page 361 SW1. Refer to Table 44 on page 353. The Sensor Board connectors TB9 to TB26 provide connection points for the various system sensors and switches. The function of each terminal block is described on the silkscreen. Refer to Table 45 on page 354. Gem-5 User’s Manual...
Page 362 Appendix H Component Details – Standard Models Table 37 Language Switch Selection Pin Functions SW6-2 IN1 (TB26-2) IN2 (TB26-3) IN3 (TB26-4) DESCRIPTION Pushbutton Shorting IN1 to GND advances to next available language Language #1 Language #2 Language #3 Language #4 Language #5 Language #6 Language #7...
Page 363 +12 V POWER HAND SENSOR 1 INPUT HAND 2 (TB20) GROUND +12 V +12 V POWER HAND SENSOR 2 INPUT FOOT 1 (TB11) GROUND (Cronos: Front Door +12 V +12 V POWER Sensor “Closed”) FOOT SENSOR 1 INPUT Gem-5 User’s Manual...
Page 364 Appendix H Component Details – Standard Models FOOT 2 (TB21) GROUND (Cronos: Rear Door +12 V +12 V POWER Sensor “Closed”) FOOT SENSOR 2 INPUT TOE (TB12) GROUND +12 V +12 V POWER TOE SENSOR INPUT HEAD (TB22) GROUND +12 V +12 V POWER HEAD SENSOR INPUT BODY (TB13)
Page 365: Serial Bus Terminator Board (Scn 816546)
Detect personnel in monitor Transmit/Receive across frame at mid- height Body-In Photoelectric GEM-5 Head Detect body close to body detector array – the IR bkg detector side opposite to Liquid Crystal Display (LCD) suppression panel near Screen head detector Gem-5 User’s Manual...
Page 366: Approach Sensor
2 to 2.5 m (6 to 8 feet). The effective range of the sensor can be controlled by adjusting the angle of the mounting bracket on the roof. Since the GEM-5 monitors are bidirectional, i.e. they can be entered from either side, there are two approach sensors on those units.
Page 367: Body-In Sensors
The body sensor is used on whole body monitors to determine when the user is positioned close enough to the body detectors. This sensor is a photoelectric IR background suppression type for the GEM-5. Additional information about sensors is provided in Sensor Setup starting on page 364.
Page 368: Component Details - Options
Component Details – Options This Appendix describes the instrumentation and control components of the Options available for Gem-5 contamination monitors. The components, which are standard with GEM-5 contamination monitors, are described in the appendix Component Details – Standard Models on page 352.
Page 369 Relay 5 NORMALLY (TB5) DE-ENERGIZED SW2-2 Relay 6 NORMALLY ENERGIZED NORMALLY (TB6) DE-ENERGIZED LED indicator on the board is ON when associated signal is active. LED indicator on the board is ON when associated signal is active. Gem-5 User’s Manual...
Page 370 Appendix I Component Details – Options Table 45 Sensors/Switches Terminal Blocks Pin Assignments LABEL PIN # SIGNAL DESCRIPTION IN 1 (TB15) GROUND +12 V +12 V POWER IN 1 INPUT IN 2 (TB7) GROUND +12 V +12 V POWER IN 2 INPUT IN 3 (TB16) GROUND +12 V...
Page 371 IN 13 INPUT IN 14 (TB13) GROUND +12 V +12 V POWER IN 14 INPUT IN 15 (TB22) GROUND +12 V +12 V POWER IN 15 INPUT IN 16 (TB14) GROUND +12 V +12 V POWER IN 16 INPUT Gem-5 User’s Manual...
Page 372: Routine & Preventative Maintenance - Standard Models
J. Routine & Preventative Maintenance – Standard Models Each Mirion Technologies (Canberra CA) Ltd. contamination monitor is self- diagnosing and will identify faults such as failed high voltage, failed detector, failed detector board, etc. The Service Menu and F2 – Test Menu described in the...
Page 373: Decontamination
When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth. General Daily Cleaning For the GEM-5, a daily cleaning of the floor pan and a periodic cleaning/decontamination of the inner and outer surfaces will insure long-term trouble-free operation. Cleaning frequency requirement depends on the local conditions and number of monitoring cycles abd should be adjusted accordingly.
Page 374: Testing For Alarms
Alarm Test key switch and switch from NORMAL to ALARM TEST. The switch is located on the outside frame on the GEM-5 (e.g. see photo in Figure 6 on page 11). The key cannot be removed in the ALARM TEST position. The monitor will begin counting down to a Clean/Contaminated decision.
Page 375: Replacing A Damaged Detector
For extra precautions, remove AC power by unplugging the monitor from the external AC power source. Figure 150 Open Door to Access Detectors GEM-5. Gem-5 User’s Manual...
Page 376: Scintillation Detectors
Removal Preparatory Work Remove the floor pan to access the foot detector on the GEM-5 (remove two screws on each side of the floor pan). Unscrew the fasteners and remove the flat metal panel to access the vertical detectors. The overhead detector is accessed from the roof by unscrewing the fasteners and removing the flat metal panel from the top of the unit.
Page 377 (refer to Figure 153 for location of fasteners). Unplug the two cables connecting the board to the photomultiplier tube (Figure 154). Figure 153 Removing the Gamma Board Figure 154 Unplugging the Cables from the Gamma Board Gem-5 User’s Manual...
Page 378 Appendix J Routine & Preventative Maintenance – Standard Models Remove Detector Assembly from Monitor Unscrew the six fasteners (three on each side) that attach the detector frame to the monitor. The detector assembly can then be removed from the unit and placed on a workbench.
Page 379: Replacing A Damaged Photomultiplier Tube
Slide the assembly out of its housing, as shown in Figure 155 below (bottom). Remove the photomultiplier tube from its socket and replace it with the new tube. Figure 155 The photomultiplier tube housing (top) and removal (bottom). Gem-5 User’s Manual...
Page 380: Sensor Setup
Appendix J Routine & Preventative Maintenance – Standard Models Reinsert the assembly into the housing. Some resistance from the spring loaded mount will be felt when the front of the tube makes contact with the optical coupler inside the housing. Lock into place using the screws removed earlier. Finally, use black opaque tape, such as 3M Super 88, to replace any tape removed or disturbed during disassembly.
Page 381: Photoelectric Sensors
It is factory-preset and should not normally require adjusting. Operation Selector: Some units have an operation selector to select Light-On or Dark-On operation. If present, this should be set to L for Light-On operation. Gem-5 User’s Manual...
Page 382: Background Suppression Infrared Photo Sensor
Appendix J Routine & Preventative Maintenance – Standard Models Background Suppression Infrared Photo Sensor This device is used as a foot, hand, and body sensor on different models (refer to Table 41 on page 349). It is a one-piece combined transmitter-receiver type. Sensitivity is set at the factory for the application and can be adjusted if required.
Page 383: Computer Box
Computer Box The monitor is equipped with a custom designed computer box (currently used is Mirion Technologies (Canberra CA) Ltd. PN 7079642) which houses the Carrier Board (CANBERRA PN 7078120), the computer CPU board (third party) with Microsoft Windows 7 (or XP if required by a special order) Embedded, and the low voltage power supply (see Figure 159 below).
Page 384: Computer Windows 7 (Or Xp) Embedded Operating System
Appendix J Routine & Preventative Maintenance – Standard Models Computer Windows 7 (or XP) Embedded Operating System The monitor’s computer contains the Microsoft Windows 7 Embedded operating system. The embedded version of Windows 7 differs from the desktop version in that it is built specifically for this computer and only contains components necessary for the monitor's operation and maintenance.
Page 385: Solid State Drive Maintenance
"Monitor" hard disk partition. See instruction sheet as discussed in Reinstalling or Updating Monitor Software on page 370. Obtain the serial number of the unit in question and contact your local Mirion Technologies (Canberra CA) Ltd. Service affiliate for more information.
Page 386: Reinstalling Or Updating Monitor Software
Updating Monitor Software To update the software to the latest version, order a new “Monitor Software Installation Kit” (SCN 814358) from Mirion Technologies (Canberra CA) Ltd. and follow the steps shown in (SCN) 7070025 SOFT-MON-SERIAL Monitor Software Installation Instructions that comes with the new kit. One may also obtain the update via various other means (possibly via the Internet etc.).
Page 387: Preventative Maintenance - Options
The DC motor controller (Figure 160) is designed to operate a sliding door or a barrier. On the GEM-5 only the Barrier Option is available (see Table 46). The only difference between the two variants is the firmware of the controller.
Page 388: Inputs And Outputs
Appendix K Preventative Maintenance – Options Figure 160 Picture of the DC Motor Control Board (SCN 816701) Inputs and Outputs Refer to Figure 160 above. • J13: Position limit switch input; labeled LIMIT1. • J12: Position limit switch input; labeled LIMIT2. •...
Page 389: Switches
The position of SW4 should be set in such a way that, activation of the associated input causes respective LEDs D18, D45, and D1 to go ON (in practice it depends on type of switches/sensors connected to the inputs). Gem-5 User’s Manual...
Page 390: Led Functionality
Appendix K Preventative Maintenance – Options LED Functionality • D18 red; ON when limit switch 1 is activated. • D45 ON when limit switch 2 is activated. • D1 lit when optical beam is activated. • D2 red; ON when closed position is activated. •...
Page 391: Description Of The Normal Operation Phase
4. The fuses used on the board are auto reset type and.. they will automatically reset after an overload condition is removed. Technical characteristics Barrier Arms Option The total movement for barrier is ¼ rotation (90 deg) that is 2 ½ rotation of the motor shaft. Gem-5 User’s Manual...
Page 392: Detectors & Preamplifiers - Standard Models
Contamination Detector Detector Preamplifier Monitor Model Model SCN Preamplifier Type Model(s) (ass’y) SCN in Software Gamma PMT ass'y (incl. PMT, HV Divider Board, “GEM-5” 816002 Gamma Det. 816550 816061 Housing, Cables & Connectors to hook up to Gamma Det. Board)
Page 393: Spare Parts Lists - Standard Odels
Board) 816112 Gamma Board Assembly Embedded Computer Serial (Complete) for GEM-5 (pre-installed with the applicable Microsoft Embedded Operating System Image only). For Windows XP, Please 7079642 contact Mirion Technologies (Canberra CA) Ltd.Customer Service.
Page 394: Spare Parts As Needed
(OMRON A22K-2M-20) 7067485 SPARE KEYS, CAM-LOCK LF 1332, KEY #92304 Cam- needed lock/Previous (Used with Cam-Lock, Round Head, SCN 7066550 (LOWE & FLETCHER #LF 1332-03-02 type 3), for GEM-5, computer access door…EARLIER BUILDS 7067609 SPARE KEYS , #304, (CBM'S needed...
Page 395: Spare Parts Lists - Options
5 units (or portion thereof). As an example, for 12 units use 3 times the quantities, for 21 units; use 5 times the quantities shown. The above assumes up to 5 years operation with no more than 400,000 cycles per year. Gem-5 User’s Manual...
Page 396: Block Diagrams - Standard Models
Appendix O Block Diagrams – Standard Models O. Block Diagrams – Standard Models The following standard block diagrams are included: • GEM-5 General Arrangement • GEM-5 Serial...
Page 397: Gem-5 General Arrangement
GEM-5 General Arrangement Gem-5 User’s Manual...
Page 398 Appendix O Block Diagrams – Standard Models Gem-5 User’s Manual...
Page 399: Gem-5 Serial
GEM-5 Serial Gem-5 User’s Manual...
Page 400 Appendix O Block Diagrams – Standard Models Gem-5 User’s Manual...
Page 401: Block Diagrams - With Options
Block Diagrams – With Options The following optional block diagrams are included: • GEM-5W93 General Arrangement • GEM-5W100 General Arrangement • GEM-5W80-W93-W100 Gem-5 User’s Manual...
Page 402 Appendix P Block Diagrams – With Options Notes...
Page 403: Gem-5W93 General Arrangement
GEM-5W93 General Arrangement Gem-5 User’s Manual...
Page 404 Appendix P Block Diagrams – With Options Gem-5 User’s Manual...
Page 405: Gem-5W100 General Arrangement
GEM-5W100 General Arrangement Gem-5 User’s Manual...
Page 406 Appendix P Block Diagrams – With Options Gem-5 User’s Manual...
Page 407: Gem-5W80-W93-W100
GEM-5W80-W93-W100 Gem-5 User’s Manual...
Page 408 Appendix P Block Diagrams – With Options Gem-5 User’s Manual...
Page 409: Webremote
WebRemote is accessible locally on the monitor or via PC or tablet web browser when a Mirion Technologies (Canberra CA) Ltd. contamination monitor is connected to a LAN or direct link. Note: The traditional Monitor interface is offered in parallel. It is operational and seamlessly activated with the use of a USB connected keyboard.
Page 410: Web Browser Connectivity And Status Monitoring
Mirion Technologies (Canberra CA) Ltd. Contamination Monitors are equipped with a LAN (local area network) port to add networking capability. This feature permits a tablet or PC web browser to connect to Mirion Technologies (Canberra CA) Ltd. Contamination Monitor running WebRemote. WebRemote is a web based user interface rendered locally or over the network by the web browser.
Page 411: Prerequisites
The upgrade touch screen kit version depends on the monitor model and existing display type currently installed in the unit. The table below details which part number needs to be ordered based on the current monitor type and configuration. Gem-5 User’s Manual...
Page 412 LCD/CCFL (201340, NEC NL10276BC20-04) Cronos-4 TOUCHSCR-KIT-CRNS4 Cronos-11 TOUCHSCR-KIT-CRNS11 GEM-5 TOUCHSCR-KIT-GEM-5 NOTE: On the reverse face of the currently installed LCD screen, is the existing display type identification as shown in the figure below. Figure 162: Identification of LCD Screen Gem-5 User’s Manual...
Page 413: Computer Model
For example, the System Status screen below identifies an XP Embedded Runtime Version 3. Therefore, in case of a GEM-5, the upgrade part# 7079642 is required (as per table above). The upgrade PC will have Windows 7 embedded Operating System, WebRemote, and Monitor 9.0 software included.
Page 414 DashBoard Software (SCN 7081908) • DashBoard Software Installation Instructions (SCN 7081910) For instructions on upgrading to Windows 7 embedded OS follow SCN 7080334. For instructions on updating the Monitor Software to version 9 (or above), refer to SCN 7070025. Gem-5 User’s Manual...
Page 415: Installation Of Webremote, Monitor 9.0 (Or Above) , And Dashboard
Installation of WebRemote, Monitor 9.0 (or above) , and DashBoard To install Mirion Technologies (Canberra CA) Ltd. WebRemote, Monitor 9.0 (or above), and/or DashBoard software, the system hardware and Operating system must be compatible. Ensure the prerequisites outlined in section Prerequisites on page 395 are met.
Page 416: Dashboard Status Monitoring
Host Monitors (HOST#1 and HOST#2). The figure below displays the typical DashBoard view. Note: Remote connection made via PC or tablet is described in section Remote Connection to WebRemote on page 400. Gem-5 User’s Manual...
Page 417 The WebRemote user interface launched from the Dashboard has an additional button Return To DashBoard in the upper right corner, as shown in the figure below. Selecting Return To Dashboard, from WebRemote will close the WebRemote interface, and open up the previous DashBoard screen. Gem-5 User’s Manual...
Page 418: Configuration Of Contamination Monitors
In the IP Address field, change it to the IP address of HOST#1 recorded in section Installation of WebRemote, Monitor 9.0 (or above), and DashBoard Software on page 399. For network configuration which has a second Host Monitor, (HOST#2), Change Method field, under Send Data Log , to [TCP/IP (UDP Packets)]. Gem-5 User’s Manual...
Page 419: Plan Your Network Connection
See the local IT administration for DHCP support and configuration. • A Static IP enables the contamination monitor to keep a permanent IP address • It is recommended to keep a list of the IP addresses of the contamination monitors Gem-5 User’s Manual...
Page 420: How To Assign A Static Ip
1. Type "network and sharing" into the Search box in the Start Menu and select Network and Sharing Centre when it comes up. Figure 168: Network and Sharing Center Search 2. When the Network and Sharing Centre opens, click on Change adapter settings. Figure 169: Change Adapter Settings Selection Gem-5 User’s Manual...
Page 421 3. Right-click on the Local Area Connection which represents your network adapter and select Properties. Figure 170: Adapter Properties 4. In the Local Area Connection Properties window highlight Internet Protocol Version 4 (TCP/IPv4) then click the Properties button. Figure 171: Local Area Connection Properties Window Gem-5 User’s Manual...
Page 422 6. Close out of the Local Area Connections Properties window. 7. To verify if the network adapter settings have been changed correctly, run “ipconfig” in the windows command prompt. Figure 173: Verification of IP Configuration Using "ipconfig" Gem-5 User’s Manual...
Page 423: Remote Connection To Webremote
2. Open a Web browser application on the remote tablet or PC such as Internet Explorer (version 10 and up), Mozilla Firefox, or Chrome. 3. In the browser address bar, type the following "ADDRESS/cwt/pages/default.aspx" (where ADDRESS is the IP address assigned to the contamination monitor) and press ENTER on the keyboard Gem-5 User’s Manual...
Page 424: Direct Link Access
Tablet/PC/. Use a LAN cable to make a connection between both USB to Ethernet adapters. 2. Ensure the devices are on the same LAN as described in How to Assign a Static IP on page 403. Gem-5 User’s Manual...
Page 425 If WebRemote has been started by monitor program then monitor checks every 2.5 s whether it has focus and if so returns it to WebRemote, • Also 10 s after Monitor program starts it reclaims focus (from task bar) if necessary Gem-5 User’s Manual...
Page 426 (2), System information (3) Live view of traditional Monitor Software (4). 1. The current Screen Name is displayed in the upper left corner of the screen (for the main screen, Mirion Technologies (Canberra CA) Ltd. Monitor is displayed). While logged in "current user: USER" is displayed, where 'USER' the Username during login.
Page 427 7. Fields requiring an input from the keyboard have a [ABC] label. Once this field is depressed, a virtual keyboard is prompted to allow user input. 8. A virtual keyboard automatically appears when necessary. To exit the keyboard, tap the [X] on the top right corner. Gem-5 User’s Manual...
Page 428 9. Undo action for the active field (the field currently selected). 10. Loads the default value for the active field. 11. Loads the defaults for all values of the current screen. 12. A drop down list is activated when field with an arrow [>] is selected. Gem-5 User’s Manual...
Page 429 15. The Discard & Return button discards any changes made on the current screen, and returns to the former screen. 16. The Save & Return button saves the changes made on the current screen, and returns to the former screen. Gem-5 User’s Manual...
Page 430 (alpha, beta, gamma if applicable); Type button selects zone type; Zone button selects the zone; First button goes to the first numbered zone; Last Button jumps to the last numbered zone; arrow buttons [<] [>] selects the preceding or following zone, respectively. Gem-5 User’s Manual...
Page 431 27. Selecting the button (27), after making changes to a value on the Zone Settings screen, applies the all values of the current screen to all zones of the current Channel/Type. To save these changes select Save & Return Button (16). Gem-5 User’s Manual...
Page 432 Appendix Q WebRemote Notes Gem-5 User’s Manual...
Page 433 Wait Timeouts 31, 33, 34, 42, 44, 50, 52, 54, 55, 57, 65, 69, 94, 106, 120, 123, 126, 143, 144, 147, 149, 168, 245, 247, 250, 276, 280, 282, 283, 284, 285, 288, 289, 298, 302, 315 Gem-5 User’s Manual...
Page 434 K Beta – Positive Alarm Due to Contamination 275 Isotope Library 137, 138, 140, 317 K Delta - Change in Background Rate 52, 275 Low Background Rate Setting and Strategy 17, 92, 107, Reports 143, 245, 282 Gem-5 User’s Manual...
Page 435 Faults 31, 33, 34, 37, 38, 53, 54, 56, 77, 81, 95, 99, WebRemote Layout and Controls 410 147, 162, 177, 194, 196, 197, 200, 203, 221, 223, WebRemote Overview 393 227, 283 Windows 7 Operating System 404 Gem-5 User’s Manual...
Page 436 11) Fixed Verification Test to properly shown detectors being counted and net count rate of previous detector on screen. This was inadvertently hidden when adding Not Available to Last contaminated screen (when no results are available). See Change 16. below. [A][S][G] [Argos][Sirius][GEM-5][Cronos][Test] 1 of 8...
Page 437 Changes for CANBERRA Health Physics Monitors VERSION 9.01 SOFTWARE (160524) General Improvements (160421) 1) Now supports WebRemote Version 2.0.0 [A][S][G][C] o Removed support for WebRemote Version 1.0. WebRemote is required to be updated to Version 2.0 for use with Monitor Version 9.01 o See WebRemote section below 2) Now supports SOFT-LDB Table Model version 4.0.
Page 438 Changes for CANBERRA Health Physics Monitors VERSION 9.01 SOFTWARE (160524) o Fixed issue with TPS-BG-579, TPS-BG-180, and TPS-AB-579 detector “Auto Balance” feature. Previously if HV was turned off (such as when leaving Optimize HV screen) and then turned on (such as In Normal Service or Calibration screen) before HV had ramped to zero Volts then the Auto Balance was done while HV was ramping down.
Page 439 Changes for CANBERRA Health Physics Monitors VERSION 9.01 SOFTWARE (160524) Screens 1. Service Menu  Revised F1 choices. . [A][S][G][C] One of following will be available as long as at least one zone is allowed to alarm  F1 - Place in Normal Service ...
Page 440 Measurement Process ± [ ] %  Fixed Calibration Distance [] cm to be available for Alt+3 Gamma on Argos and Sirius models. It’s not available for Cronos and GEM-5 model since distances are expected to [A][S] be different. 11. F3 - Setup, F3 - Detection Zones, Shift+F5 - Global Settings.
Page 441 Changes for CANBERRA Health Physics Monitors VERSION 9.01 SOFTWARE (160524) 13. F3 – Setup, F4 – Out of Service Causes.  [A][S] Added setting Krypton Rate [WARN] that is always [WARN] when enabled  [A][S] Removed connection to Krypton Mode from setting High Bkg Rate []. ...
Page 442 Changes for CANBERRA Health Physics Monitors VERSION 9.01 SOFTWARE (160524) 20. F5 – Information Menu, F2 – Service History [A][S][G][C]  Added "Auto Balance Done" tally  Added "File Maintenance" tally  Added "Database Maintenance" tally  Added "Local WebRemote" tally ...
Page 443 Changes for CANBERRA Health Physics Monitors VERSION 9.01 SOFTWARE (160524) 8) Added [Previous] and [Next] buttons to [Printouts] [Contamination Check Results] to match functionality of F6 – Printout, F5 - Contamination Check Results screen 9) Limits [Diagnostics] [Sensor Board] displayed Inputs and Outputs to those assigned (to match keyboard interface).

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