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IDM-200 User Manual 932540B 100 pct uncompressed for

1. 24 NOISE iether 13 baseline restore ies gti 13 DER DOE tees 16 lower level discriminator setting 17 Operating cautions 10 Power internal vs external 9 Power adaptor charger 10 est ai d tieu 9 SDIDDIBE ses ch dete debe 10 28 Shutdown for long periods storage 10 28 Specifications osse US 25 Stabilizer Setup Application 6 9 Troubleshooting 23 Zero stabilization 17 65 IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Intentionally blank AMETEK 66 ADVANCED MEASUREMENT TECHNOLOGY
2. IDM 200 HPGe Interchangeable Detector Module Hardware Manual Printed in U S A ORTEC Part No 932540 0314 Manual Revision B Advanced Measurement Technology Inc a k a ORTEC a subsidiary of AMETEK Inc WARRANTY ORTEC warrants that the items will be delivered free from defects in material or workmanship ORTEC makes no other watranties express or implied and specifically NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ORTEC s exclusive liability is limited to repairing or replacing at ORTEC s option items found by ORTEC to be defective in workmanship or materials within one year from the date of delivery ORTEC s liability on any claim of any kind including negligence loss or damages arising out of connected with or from the performance or breach thereof or from the manufacture sale delivery resale repair or use of any item or services covered by this agreement or purchase order shall in no case exceed the price allocable to the item or service furnished or any part thereof that gives rise to the claim In the event ORTEC fails to manufacture or deliver items called for in this agreement or purchase order ORTEC s exclusive liability and buyer s exclusive remedy shall be release of the buyer from the obligation to pay the purchase price In no event shall ORTEC be liable for special or consequential damages Quality Control Before being approved for shipment each ORTEC in
3. t a ege ek cunt 7 os sud cios Cah oy 28 shock tolerance 10 shutdown for long periods storage 10 28 seko saab e DESSEN 5 28 status readout in MAESTRO 20 Firmware version 18 60 Gain 17 IDM 200 tise et a a edd and 3 16 amplifier settings 13 14 battery replacement 5 ro aa n Cbar 5 external input status in MAESTRO 20 external mpuls ss cies ox eae aaia 5 28 features illustrated 4 firmware 35 THOME panel os elk toy as 3 high voltage on off monitor 18 long term storage storage 28 Monitor hardware status 19 On Off button 3 operating cautions 10 Soie 20 remote power 3 27 Rds ath aN 10 shock tolerance Loses ca o asad eed oy 10 Stabilizer Setup Application 6 9 stabilizer setupin MAESTRO 17 temperature and humidity specifications 10 Steht 15 2 31 Long term storage shutdown 28 MAESTRO MCB Properties setup 13 Monitor detector state of health 19 puo M ETT 20
4. RISE Responses SHAP RISE 0000000000003 2 SHOW SHUTDOWN Shows the type of HV shutdown selected Always SMART 1 for this unit Responses FSMI SMART 1 mode selected SHOW SHUT ACTUAL Returns the current status of the bias remote shutdown input signal This command is valid whether the bias supply is turned on or off Responses IT Shutdown is active supply is shut down or can t be turned On IF Shutdown is inactive supply is on or can be turned on SHOW SNUM Responds with a F record indicating the serial number of the IDM 200 Response F100 Serial number is 100 www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 5 7 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 SHOW_STATUS Returns system status information in the following format Mlllilililittttttttttaaaaahhhhhccc CR where represents the live time as returned by the SHOW LIVE command tttttttttt represents the true time for the current device as returned by the SHOW TRUE command aaaaa represents the active device mask as returned by the SHOW ACTIVE DEVICES command and hhhhh represents the hardware status which is an ASCII representation of a 16 bit decimal number with the following bit definitions Bit 0 LSB Bias supply polarity O positive 1 negative Bit 1 B
5. www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 3 7 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 alphanumeric character strings rather than numerical values Items in the command prototype that are surrounded by square brackets are optional items and are not always required The term CR represents the ASCII carriage return character decimal value 13 and the character 4 represents the ASCII underscore character decimal value 95 CLEAR The channels of spectral data in the window of interest see SET WINDOW command are set to zero The live time and true time counters are also set to zero This command is equivalent to the combination of CLEAR COUNTERS and CLEAR DATA commands CLEAR ALL This command is equivalent to the combination of CLEAR COUNTERS CLEAR DATA CLEAR PRESETS and CLEAR ROI commands CLEAR PRESETS The live time true time ROI integral ROI peak and overflow presets are all set to zero disabled CLEAR ROI The region of interest flags for the channels in the window of interest see SET WINDOW command in the currently selected device see SET DEVICE command are cleared DISABLE BLRE AUTOMATIC Disables the automatic determination of baseline restorer time constant See also ENABLE BLRE AUTOMATIC SET BLRE and SH
6. 1 SSS Ea SSCS 1 Repmebfirmosml 135 Not applicable white aeie 16 e Cin Micro error codes Input already started stopped Preset already exceeded Parameter was rounded for decimal numbers No sample data available _1 AMETEK 36 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES 7 2 1 Dollar Response Records SHOW and STEP commands respond with a single dollar response record followed immediately by a percent response record All valid dollar response records for each command are listed in the command dictionary The following list provides the general form of each dollar response record for the MCB API In this list lower case letters represent numeric values The letters ccc always represent an 8 bit unsigned checksum of all characters on the record up to but not including the checksum charac ters and lt CR gt represents the ASCII carriage return character Axxxcecc lt CR gt 15 a single 8 bit unsigned number Cxxxxxccc lt CR gt 15 a single 16 bit unsigned number Dxxxxxyyyyyccc lt CR gt and yyyyy are 16 bit unsigned numbers Exxxxxccc lt CR gt 15 a single 16 bit alarm mask F ssss lt CR gt 5555 15 a variable length ASCII character sequence no checksum is sent with this record lt gt XXXXXXXXXX is a Single 32 b
7. i Acquisition Start Time Access locked and Read Only means it i 10 48 37 Wednesday March 14 2012 Read wiite locked See the MAESTRO User s m mr Firmware Revision Serial Number Acquisition Mode Manual DETM 002 7729 PHA Use the Firmware Revision field to determine the instrument type Fig 11 About Tab and firmware version This para This is a reference to the IDM 200 s 1 detector technology For more information on SMART 1 see the ORTEC catalog or visit www ortec online com AMETEK 1 8 ADVANCED MEASUREMENT TECHNOLOGY 932540 0314 3 MCB PROPERTIES IN MAESTRO meter is formatted DE7M nnn where DETM is for the IDM 200 and nnnis the firmware version In the accompanying illustration DE7M 002 indicates an IDM 200 running firmware v2 You can also use the About tab to view this information for SPC format spectra downloaded from the IDM 200 3 8 Status Figure 12 shows the Status tab All Properties for P1D1 7729 parameters are continuously moni tored i 16 Satisfact tat Amplifier Amplfier2 AmplifierPRO ore U TEASA E Ory Stabilizer High Voltage About Status Presets is reported as or a numerical value A failure is reported as ERR x State Of OK or a descriptive message Use the list M Gamma Dose Rate 0 02 uSv h Ge boxes to select any six parameters Detector Temperature to be displayed simultaneously on Battery Vokage 16 53 Vots
8. the Status tab You can change the Battery Time Remaining 193 Min selected parameters at any time Y Cooler Body Temperature The monitored parameters are Detector State of Health Fig 12 Status Tab Reported as OK or ERR e Gamma Dose Rate Reported in n Sv h and indicating whether this reading was made with the detector Ge for low dose rates or the Geiger M ller tube GM for high dose rates See Gamma Dose Rate Determination page 25 for further discussion of the two dose rate meters Detector Temperature Reported as OK or ERR e Battery Voltage Reported in volts e Battery Time Remaining In minutes Cooler Body Temperature OK or ERR Cooler Drive Voltage OK or ERR Cold Tip Temperature OK or ERR www ortec online com Tel 865 482 4411 _ortec info amet 801 South Illinois Ave Oak Ridge TN 57601 0895 U S A 1 9 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 HV Bias In volts External In 1 The format is Cnts input level where N is the number of rising edges on this input since the current data acquisition started and the input level is 1 high or 0 low External In 2 Same format as External In 1 Ion Pump Diag Code For maintenance purposes only To resolve status problems refer to the troubleshooting chapter For fur
9. which will either be packaged with this instrument or otherwise supplied as part of a multi component system NOTE sure to keep the box and foam and use it for shipping the instrument Any options will be packaged separately and will include instructions for that option 2 2 The IDM 200 Figures 1 and 2 show the IDM 200 s major features CAUTION The IDM 200 is significantly nose heavy Keep this in mind when lifting and positioning the unit 2 2 1 Front Panel On Off Button Located below and left of the HPGe detector endcap Press to turn on the IDM 200 If connected to external power or if the internal battery is sufficiently charged the unit will power up and the cooler will start automatically Note the outer edge of the On Off button which illuminates when the power is on This indicator is steady when the IDM 200 is ready for data acquisition and blinks if unit is not ready for instance if the detector is warm The IDM 200 also has a remote power on off capability for integrating the unit into a larger system See the specification on page 27 in Chapter 5 IDM 200 Interchangeable Detector Module Hardware Manual Input External USB power inputs HPGe detector endcap On Off button w illuminated ring Fig 1 Front and Top Panel Features Input External USB power inputs HPGe detector endcap Battery hatch Fig 2 Top Panel Features 932540B 0314 AME
10. 7 FIRMWARE COMMANDS AND RESPONSES SHOW MONI LIVE num Returns with an ASCII representation of the real time value for the monitor SHOW MONI MAX Returns with the number of monitors available for viewing SHOW MONI VALUE num Returns with an ASCII representation of the value for the monitor at the end of the last acquisition SHOW NEXT Used in conjunction with the SHOW ROI command SHOW NEXT reports the next continuous group of channels that have the ROI flag set The response is of the form Dsssssnnnnnccce lt CR gt where sssss represents an integer number that is the number of the first channel of the next group of channels that all have their ROI bit set and nnnnn represents an integer number that is the number of channels in the group If no more channels have their ROI bit set SHOW NEXT returns a first channel of 0 and a number of channels of 0 The SHOW ROI command is used to report the first group of channels that all have their ROI bit set Example Responses D0100000050078 CR Next ROI group starts at channel 1000 and is 50 channels long D0215000150086 CR Next ROI group starts at channel 2150 and is 150 channels long D0000000000072 CR No other ROI groups to report SHOW PEAK This command returns the contents of the ROI channel with the largest number of counts An ROI channel is a channel that has the ROI flag set The maximum possible value is 2147483647 which 1s the maximum number of counts t
11. G0000000000075 lt CR gt Integral reported as 0 G4294967294131 lt CR gt Integral reported as 4294967294 G4294967295132 lt CR gt Integral reported as greater than or equal to 4294967295 maximum reportable value SHOW_INTEGRAL_PRESET Reports the current ROI integral preset value For more information about the ROI integral preset see SET_INTEGRAL_PRESET See also SHOW_INTEGRAL Responses G0000000000075 lt CR gt Integral preset reported as 0 G4294967295132 lt CR gt Integral reported as 4294967295 SHOW_INTEGRAL_REMAINING Reports the current ROI integral remaining value For more information about the ROI integral remaining see SET_INTEGRAL_REMAINING See also SHOW_INTEGRAL Responses G0000000000075 lt CR gt Integral remaining reported as 0 G4294967295132 lt CR gt Integral reported as 4294967295 SHOW_LENGTH_SAMPLE Reports the number of points in the Insight Mode Waveform Response C010000088 1000 points in the waveform SHOW LFR Tells whether LFR mode is enabled Responses SIF LFR mode disabled LFR mode enabled SHOW_LIVE Reports the contents of the live time counter in units of 20 ms 50 ticks s See also CLEAR_COUNTERS and SET_LIVE www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 5 3 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Har
12. INTRODUCTION The ORTEC IDM 200 is designed as a gamma ray detection building block for systems such as portal monitors The IDM 200 is a completely self contained subsystem comprising a single mechanically cooled high purity germanium HPGe detector of standardized crystal dimensions and all necessary electronics in a rugged package sized for benchtop use or mount ing in a standard 19 inch 48 3 cm rack It has everything needed to detect gamma rays and send either the energy histogram or a digitized pulse stream to a PC for analysis ready for use in a variety of systems where nuclide monitoring and identification is needed IDM 200s are designed for long reliable service and can be swapped out for service quickly limiting downtime to an absolute minimum To bring a new IDM 200 online run the accom panying gain stabilization setup application and it is ready for installation in your system For OEM applications ORTEC CONNECTIONS programmers toolkits are available Contact your ORTEC representative or our Global Service Center for more information Before using the IDM 200 it must be set up and cooled and the gain stabilizer adjusted with the accompanying Stabilizer Setup Application as described in Chapter 2 1 1 Rugged Reliable Rapidly Interchangeable Uniform large area 85 mm x 30 mm HPGe detector crystal gives high efficiency at low energies High capacity high reliability Stirling cooler cools rapidly to oper
13. carton Connect the power input cable to ac power source and to the IDM 200 s top panel INPUT POWER connector Press the On Off button Within a few seconds the cooler will activate it is very quiet but you may be able to feel its vibration The outer ring of the On Off button will blink until the detector is cool and the detector high voltage turns on at which point the blinking will change to steady illumination If you wish to monitor the detector and hardware status during cooldown start MAESTRO select MCB Properties from the Acquire menu click on the Status tab and view the various monitored parameters Refer to the MAESTRO User s Manual for more information on this feature The IDM 200 typically requires lt 15 hours to fully cool When the detector reaches operating temperature the IDM 200 bias voltage will automatically turn on and the outer ring of the On Off button will remain steady on Note that the internal battery will not charge until the detector has reached operating temperature After that the battery will typically reaches full charge in 3 4 hours Alternatively you can use a 12 V dc auto accessory adapter If using a vehicle battery as a power source note that cooling the detector to operating temperature can significantly discharge the vehicle battery AMETEK 6 ADVANCED MEASUREMENT TECHNOLOGY 932540 0314 2 GETTING STARTED NOTE Once the IDM 200 is cooled you can turn
14. the IDM 200 13 IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 for low count rates Auto adjusts the time constant as appropriate for the input count rate The time constant can be manually set on the InSight display for more information see the discussion on Marks in the MAESTRO User s Manual 3 1 3 Pole Zero Adjustment To maintain optimum energy resolution and peak position stability to high counting rates it is important to enter the correct value for the pole zero cancellation Use the default value as the starting point To make a fine adjustment of the Pole Zero setting 1 On the Amplifier PRO tab unmark disable LFR mode 2 Use a radioactive source that produces a well defined peak near the upper limits of the energy spectrum At low counting rates note the symmetry of the peak 3 Move the source closer to the detector to achieve much higher counting rates If the peak maintains the symmetry observed at low counting rates no further adjustment of the Pole Zero is needed If high counting rates generate a tail on the high energy side of the peak slightly decrease the pole zero value until the tail disappears If high counting rates generate a tail on the low energy side of the peak slightly increase the pole zero value until the tail disappears 4 Make a final adjustment to balance the symmetry of the peak as closely as possible to the symmetry observed at low counting rates This
15. the ROI peak count In this circumstance the ROI Peak preset can be viewed as a safety valve AMETEK 20 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 3 MCB PROPERTIES IN MAESTRO The values of all presets for the currently selected Detector are shown on the Status Sidebar These values do not change as new values are entered on the Presets tab the changes take place only when you Close the Properties dialog Enter the Real Time and Live Time presets in units of seconds and fractions of a second These values are stored internally with a resolution of 20 milliseconds ms since the Detector clock increments by 20 ms Real time means elapsed time or clock time Live time refers to the amount of time that the Detector is available to accept another pulse 1 is not busy and is equal to the real time minus the dead time the time the Detector is not available Enter the ROI Peak count preset value in counts With this preset condition the Detector stops counting when any ROI channel reaches this value unless there are no ROIs marked in the Detector in which case that Detector continues counting until the count is manually stopped Enter the ROI Integral preset value in counts With this preset condition the Detector stops counting when the sum of all counts in all channels for this Detector marked with an ROI reaches this value This has no function if no ROIs are marked in the Detector www ortec online com Tel 865 482
16. warranty The IDM 200 should be opened only by ORTEC authorized service personnel If you have any questions about the use or maintenance of this instrument please contact your ORTEC representative or our Global Service Center first www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A For International Office Locations Visit Our Website iii iv Intentionally blank AMETEK ADVANCED MEASUREMENT TECHNOLOGY TABLE OF CONTENTS WARRANTY dd ii ADDITIONAL WARRANTY STATEMENT eeeeeee eee eee eee eens iii Safety Instructions and Symbols 4 a ROC ob vii Cleaning Instructions INTRODUCTION PE EEG RSS EE RE RU dE x 1 1 1 Rugged Reliable Rapidly Interchangeable 1 1 2 special Hardware Features 2 2 GETING STARTED EIC 3 2 1 M jor System Components ce ERR EE E AER 3 22 ThE 20 Sd nde RR ER ode a eke on o hea aa ae AER 3 291 Front Panel uus av Aat ENS b het dod ata dede deat ae Vates 3 2 2 2 Top Panel Connectors 5 2 2 3 The Internal Battery vee REN ERI RE ES 5 2 3 SoftWare Ins
17. will result in the optimum pole zero adjustment 3 2 Amplifier 2 Figure 6 shows the Amplifier 2 tab which accesses the advanced shaping controls including the InSight Virtual Oscilloscope mode Use the up down arrows to adjust the Rise Time within the range of 3 2 to 23 0 us The many choices of Rise Time let you precisely control the tradeoff between resolution and throughput Starting with the default value you should increase the rise time for better resolution for expected lower count rates or when you anticipate unusually high count rates reduce the rise time for higher throughput with somewhat worse resolution AMETEK 14 ADVANCED MEASUREMENT TECHNOLOGY 932540 0314 3 MCB PROPERTIES IN MAESTRO For the more advanced user the Properties for P1D1 7729 InSight mode allows you to directly 2 ll th t discit Stabilizer High Voltage About Status Presets Amplifier Ampier2 AmpierPRO aoco them interactively while collecting ne live data To access the InSight vat mode go to the Insight section on M the Amplifier 2 tab and click on 600000 Start The InSight mode is dis cussed in detail in the MAESTRO InSight r s Manual User s Manual Stat Stop The Rise Time value is for both the rise and fall times thus changing the rise time has the Fig 6 Amplifier 2 Tab effect of spreading or narrowing the quasi trapezoid symmetrically The Flattop controls ad
18. 2 lt CR gt Time returned 10 54 17 10 h 54 min 17 s N020013037050 lt CR gt Time returned 20 13 37 20 h 13 min 37 SHOW TRIG SAMPLE Reports the trigger source in Insight Mode Responses FOLLD LLD is source FIPKD Peak detect is source F2RANDOM Trigger happens randomly F3Gate Gate Input triggers the waveform SHOW TRIGGER SPECIAL Not used included for backward compatibility SHOW TRUE Reports the contents of the true time counter in units of 20 ms 50 ticks s See also CLEAR COUNTERS and SET TRUE Responses G0000000000075 lt CR gt True time reported as 0 ticks G0000000001076 lt CR gt True time reported as 1 tick 20 ms G4294967295132 lt CR gt True time reported as 4294967295 ticks over 23000 days SHOW_TRUE_PRESET Reports the current true time preset in units of 20 ms 50 ticks s See also CLEAR_PRESETS and SET_TRUE_PRESET Responses G0000000000075 lt CR gt True time preset reported as disabled G0000000001076 lt CR gt True time preset reported as 1 tick G4294967295132 lt CR gt True time preset reported as 4294967295 ticks SHOW_TRUE_REMAINING Reports the current true time remaining in units of 20 milliseconds 50 ticks per second See also SET_TRUE_REMAINING www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 5 9 or International Office Locations Visit Our Website IDM 200 HPGe Interc
19. 3 IDM 200 Cab 1 Shelf 3 IDM 200 Cab 1 Shelf 4 IDM 200 Cab 2 Shelf 1 Help IDM 200 Cab 2 Shelf 2 IDM 200 Cab 2 Shelf 3 IDM 200 Cab 2 Shelf 4 IDM 200 Cab 3 Shelf 1 IDM 200 Cab 3 Shelf 2 IDM 200 Cab 3 Shelf 3 Renumber New IDM 200 Cab 3 Shelf 4 IDM 200 Cab 4 Shelf 1 Close Renumber All Instr Input System See Errors Fig 3 MCB Numbering and Descriptions This is the first time you have configured these detectors All detectors must have an ID number Since none of your detectors have ID numbers it is recommended that you press Renumber All to establish initial ID numbers for your detectors Fig 4 New Instruments Must Have a Non Zero ID Number this is a first time installation of ORTEC products all your instruments will be new AMETEK 8 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 2 GETTING STARTED 2 7 Option Running the Stabilizer Setup Application If this IDM 200 is a component in a larger system as opposed to a benchtop MCA your system may call for use of the accompanying IDM 200 Stabilizer Setup Application Follow its instruc tion sheet P N 934070 When the setup routine successfully completes the IDM 200 is ready for use in your monitoring solution 2 8 Connecting to and Disconnecting from the PC The IDM 200 can be connected to and disconnected from the system without shutting down either If this unit is a component of a larger system the system s design w
20. 411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 27 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 5 2 Connectors USB 52 Top panel high speed USB port connects the IDM 200 s microprocessor to the controlling PC Waterproof threaded cap should be left in place when the port is not in use INPUT POWER Top panel external power input with dust cover 12 17 V dc 90 W from battery or ac mains EXTERNAL 1 and 2 ports Connect to neutron detectors occupancy sensors other peri pherals V to 5 V with adjustable threshold Set thresholds with firmware commands SET THRESH AUX page 46 and SHOW THRESHOLD AUX page 58 Waterproof threaded cap should be left in place when a port is not in use 5 3 PC Prerequisites The IDM 200 operates in conjunction with ORTEC CONNECTIONS software such as MAESTRO on PCs running Microsoft Windows 7 or XP Professional SP3 5 4 Shipping the IDM 200 To avoid damaging the cooler and where applicable to comply with transportation regulations be certain to turn the IDM 200 off before packaging and shipping The unit can be shipped as soon as the cooler is turned off There is no need to wait until the detector warms up 5 5 Long Term Shutdown Storage CAUTION This instrument should be cooled and brought to operational status illuminated out
21. 4411 801 South Ilinois Ave Oak Ridge TN 37831 0895 U S A 2 1 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Intentionally blank AMETEK 22 ADVANCED MEASUREMENT TECHNOLOGY 4 TROUBLESHOOTING 4 1 If the On Off Button Does Not Stop Flashing If the illuminated ring on the IDM 200 s On Off button begins flashing during normal operation or if you start up a warm unit and the button does not stop flashing after 20 or more hours of cool down Connect the unit to the PC on which the accompanying CONNECTIONS Driver Update Kit and MAESTRO were installed start MAESTRO and select the IDM 200 from the detec tor list If you receive a bad state of health notification click on OK On the menu bar select Acquire MCB Properties then click on the Status tab and refer to Section 3 8 The state of health detector temperature cooler body temperature cooler drive voltage and cold tip temperature readouts should be OK On the High Voltage tab the actual HV should be within a few percent of the factory set target voltage If any of the status monitors read ERR and or the HV is off allow the unit to cool for a few more hours If it does not return to ready status contact your ORTEC representative or our Global Service Center 4 2 If You Drop the IDM 200 The IDM 200 has been designed to be a rugged instru
22. ECTIONS makes use of this feature String the data identifier 32 bytes maximum string2 the data 128 bytes maximum SET DATE day month year Sets the date stored in the battery backed up system clock to the specified values Day can be any value from 1 31 month any value from 1 12 and year any value from 0 99 The current date and time are stored for a device when an acquisition is started See also SHOW DATE SET TIME and SHOW TIME SET DATE START day month year Sets the start date to the specified values Normally the start date and time are set automatically whenever a device is started with the START command See also SHOW DATE START SET TIME START and SHOW TIME START SET DELAY SAMPLE num Delays the waveform collected in InSight mode by num points Num must be between 0 and 65535 See also SHOW DELAY SAMPLE SET GAIN ADJUSTMENT value Sets the gain stabilization adjustment to an arbitrary value from 65535 to 65535 This adjustment is usually made only by the gain stabilizer and reset to 0 with the INITIALIZE GAIN STABILIZATION command See also SHOW GAIN _ ADJUSTMENT SET GAIN CHANNEL chan Sets the center channel for the stabilizer gain peak If a gain channel is chosen such that the beginning channel or ending channel would be below channel 0 or above the maximum channel as determined by the conversion gain the gain peak width is reduced until the peak fits the device boundaries A gain channel and width must be set befo
23. JUSTMENT ENABLE_GAIN_ STABILIZATION and DISABLE_GAIN_ STABILIZATION INITIALIZE_ZERO_STABILIZATION Resets the zero peak stabilization adjustment to unity no adjustment This value is reported as 2048 by the SHOW_ZERO_ADJUSTMENT command See also SET_ZERO_ ADJUSTMENT ENABLE_ZERO_STABILIZATION and DISABLE_ZERO_ STABILIZATION LIST_BLRE Lists the valid settings of the baseline restore function LIST_CORR_FLAT Lists the valid settings of the flattop width LIST_GAIN_COARSE Lists the valid coarse gain settings the IDM 200 supports only the setting 1 LIST_GAIN_CONV Lists legal conversion gain settings Response GAIN_CONV 512 1024 2048 4096 8192 16384 LIST_GAIN_FINE Lists the valid fine gain settings LIST_HV Lists the valid high voltage settings LIST ROI SAMPLE Lists the valid ROI sample settings AMETEK 40 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES LIST_SHAP_FLAT Lists the valid flattop width settings LIST_SHAPE_RISE Lists the valid rise time settings LIST_SHUT Lists the valid shutdown settings LIST_TRIG_SAMPLE Lists the valid sample trigger settings RESTORE_CAL Initializes spectrum stabilizers returns fine gain to factory calibration and returns energy calibration to factory calibration RESTORE_CAL_ENERGY Returns energy calibration to factory calibration RESTORE_GAIN_FINE Returns fine gain to factory calibration SAMPLE Sending this command c
24. OW BLRE DISABLE COOLER Powers off the cooler Typically used only for troubleshooting DISA COUNT LIST x In the List Mode data stream data from the external inputs can either be returned as a counter or a level This command sets the specified input to be used as a Level 0 EXTERNAL 1 1 EXTERNAL 2 See also COUNT LIST DISABLE GAIN STABILIZATION Stops stabilization of the gain peak while data is being acquired The gain stabilization adjustment is held at its current value until either gain stabilization is reenabled with the AMETEK 38 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES ENABLE GAIN STABILIZATION command or reinitialized with the INITIALIZE __ GAIN STABILIZATION SET GAIN PEAK or SET GAIN WIDTH command See also SHOW GAIN STABILIZATION DISABLE HV Turns off the high voltage See also ENABLE HV and SHOW HV DISABLE ZERO STABILIZATION Stops stabilization of the zero peak while data is being acquired The zero stabilization adjustment is held at its current value until either zero stabilization is reenabled with the ENABLE ZERO STABILIZATION command or reinitialized with the INITIALIZE _ ZERO STABILIZATION SET ZERO CHANNEL or SET ZERO WIDTH commands See also SHOW ZERO STABILIZATION ENABLE BLRE AUTOMATIC Enables the automatic determination of baseline restorer time constant See also DISABLE _ BLRE AUTO SHOW BLRE and SET BLRE ENABLE COOLER Powers on the cool
25. TEK ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 2 GETTING STARTED 2 2 2 Top Panel Connectors INPUT POWER Supplies external power for operating the IDM 200 and recharging the internal battery Waterproof INPUT POWER connector is position keyed and secured with a screw collet When not connected to external power seal the connector with its threaded waterproof cap EXTERNAL 1 and 2 ports Connect to neutron detectors occupancy sensors other peripherals to 5 with adjustable threshold Set and monitor thresholds with firmware commands SET_THRESH_ AUX SHOW THRESHOLD AUX SHOW ENAB_ COUNT LIST and DISA COUNT LIST Waterproof threaded cap should be left in place when a port is not in use USB port e amp amp Used to connect the IDM 200 s microprocessor to the controlling PC Waterproof threaded cap should be left in place when the port is not in use CAUTION If using a USB cable with a threaded cap such as the cable suppled with the IDM 200 be sure the cable is oriented and inserted correctly in the USB port before tightening the threaded cap otherwise the port receptacle may be damaged and require factory repair 2 2 3 The Internal Battery When the internal battery no longer holds a charge typically after 3 5 years contact ORTEC for the appropriate battery replacement kit See Chapter 8 for instructions on replacing it Note that the battery hatch is the only part of
26. ata and write it to a disk file 6 1 Spectrometer Data Format List Mode data is retrieved from the IDM 200 spectrometer by calls to the CONNECTIONS MIOGetData DLL function or the CONNECTIONS control GetRawData method A minimum of 4 and a maximum of 16384 32 bit words of data can be requested at a time Each request for data returns a block of 32 bit list mode words that begin with a 32 bit integer number of valid bytes followed by a 3 word CONNECTIONS time stamp thus the minimum of 4 words in a request The first word is the number of bytes returned not including the first 4 bytes The minimum value returned here is 12 indicating 3 CONNECTIONS time stamp words only and the maximum is 65532 indicating 3 CONNECTIONS time stamp words plus 16383 data words The CONNECTIONS time stamp represents the 64 bit Windows file time that corresponds to the exact time that the request for data is sent to the spectrometer At the exact time the CONNEC TIONS requests data from the spectrometer the spectrometer creates a hardware time word in the list mode data stream that indicates the corresponding time within the spectrometer The 16 bit real time number on the hardware time word is from the same time source as the 16 bit real time stamps on each of the ADC words Using the CONNECTIONS time stamp and the hardware time word you can determine the 64 bit Windows time associated with each ADC word in the buffer Refer to the Win 32 function GetSystemTimeAsFi
27. ating temperature Integrated high voltage supply Hardened cryostat designed for long operational life Can be temperature cycled at any time even from partial warmup Low power consumption Mains ac powered High speed USB bus for rapid data transfer to and from a host PC High performance digitally stable signal processing Easy substitution of IDM 200 modules while in operational state reduced down time Continuous data collection no dead spots using List Mode Low Frequency Rejector LFR improves spectrum resolution in noisy environments Patent pending IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 1 2 Special Hardware Features The IDM 200 is an advanced all in one HPGe gamma ray spectrometer which can be deployed as a component in a variety of measuring systems Pulse Height Analysis PHA Mode The instrument s most familiar function is data acquisition in pulse height analysis PHA mode in which a data histogram of events versus channel number a spectrum is gathered and stored in the onboard data memory For each pulse digitized the spectrum is incremented by one count in the channel corresponding to the energy of the gamma ray List Mode In List Mode the IDM 200 records and stores the pulse value with a time stamp for every pulse generated by the detector With List Mode you can write your own programs that can reconstruct histograms for any time segment without dea
28. auses another waveform to be captured in InSight mode This command is invalid when not in InSight mode SET_BLRE baseline This sets the baseline restorer time constant to the value baseline Baseline is in microseconds with a range from 10 to 100 The specified value is only used if automatic baseline restorer mode is disabled See also ENABLE_BLRE DISABLE_BLRE and SHOW_BLRE SET CAL ADJUST fff ff Adjusts fine gain by the ratio New fine gain Current fine gain 1 FI where fff ff can be positive or negative SET_CORRECTION_FLAT value This sets the flattop correction to value See also SHOW_CORRECTION_FLAT www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 4 1 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 SET_DATA start chans value If the optional start and chans parameters are included in this command the range of channels specified by start and chans is loaded with value If start and chans are not specified sets all channels of spectral data in the window of interest see SET_WINDOW command to the specified value ROI flags are not affected SET DATA APPLICATION string1 string2 This is used to store information in the IDM 200 internal memory that can be used by other programs such as sample descriptions and energy calibrations CONN
29. count G2147483646120 lt CR gt Peak preset set to 2147483646 counts G2147483647121 lt CR gt Peak preset set to 2147483647 counts SHOW_PZ Displays the PZ setting See also SET_PZ Responses PZ_ENA 002200 Pole zero enabled and set to 2200 PZ_DIS 001000 Pole zero disabled and set to 1000 SHOW_ROI Used in conjunction with the SHOW NEXT command SHOW ROI reports the first continuous group of channels that have the ROI flag set The response is of the form Dsssssnnnnnccc CR where sssss represents an integer number that is the number of the first channel of the first group of channels that all have their ROI bit set and nnnnn represents an integer number that is the number of channels in the group The SHOW NEXT command is used to report the next group of channels that all have their ROI bit set AMETEK 56 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES Responses D0100000050078 lt CR gt First ROI group starts at channel 1000 and is 50 channels long D0215000150086 lt CR gt First ROI group starts at channel 2150 and is 150 channels long D0000000000072 lt CR gt No ROI groups to report SHOW ROI SAMPLE Displays the ROI Sample setting See also SET ROI SAMPLE Responses C00001088 SHOW SHAP FLAT Reports the width of the flattop in us See also SET SHAP FLAT Responses SHAP FLAT 0000000000001 2 SHOW SHAP RISE Displays the rise time setting in us See also SET 5
30. crews from the hatch with the provided 2 5 mm hex wrench and remove the hatch to expose the battery 2 The end of the battery closest to the front of the IDM 200 has a pull tab Gently pull it outward as if opening a book cover or door until the battery slips off the connector terminals located at the lower rear of the compartment Figure 14 shows the pull tab on the front side of the battery and the connector terminals on the lower back edge Battery terminals Front Back Fig 14 Front and Back of Internal Battery 3 Guide the new battery onto the connector terminals and press it into place ensure the battery s pull tab is tucked into the battery compartment and cannot interfere with the o ring seal check the o ring to ensure it is free of particulates and fully seated in the hatch and replace the hatch CAUTION Do not damage or distort the hatch by overtightening its screws 4 Connect the IDM 200 to external power and if necessary wait for the illuminated outer edge of the On Off button to remain steady on 63 IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Intentionally blank AMETEK 64 ADVANCED MEASUREMENT TECHNOLOGY 9 duse 5 63 10 Connecting to a PC using MAESTRO 13 Cooler CAUHOUS SE RR enaa abel 10 detector warmup 28 SOUICES Code ra o Pede Cb 9
31. d time between histograms or make histograms for overlapping time slices Data can be stored easily for reconstruction of any time frame needed For more information see Chapter 6 Low Frequency Rejector LFR Filter Our Low Frequency Rejector digital filter surpasses all signal processing methods for reducing the effects of microphonics ground loops and virtually all other sources of periodic noise for HPGe and spectrometry Digital Signal Processing DSP DSP offers more options for optimizing the output signal of HPGe detectors The built in InSight Virtual Oscilloscope makes it simple to optimize detector performance for a given application from the PC the automatic baseline restorer and the highly accurate Gedcke Hale extended live time correction method Patent number 5 912 825 Ron Jenkins R W Gould and Dale Gedcke Quantitative X Ray Spectrometry New York Marcel Dekker Inc 1981 pp 266 267 AMETEK 2 ADVANCED MEASUREMENT TECHNOLOGY 2 GETTING STARTED This chapter covers the steps you will need to prepare the IDM 200 for use 2 1 Major System Components The specific components for your instrument will depend on the model and options you purchased but typically they will include a USB cable the appropriate documentation set an ac power input cable a CD containing the Stabilizer Setup Application P N 980638 You must also have the appropriate CONNECTIONS Driver Update Kit P N 797230 CD
32. dware Manual 932540B 0314 Responses G0000000000075 lt CR gt Live time reported as 0 ticks G0000000001076 lt CR gt Live time reported as 1 tick 20 ms G4294967295132 lt CR gt Live time reported as 4294967295 ticks over 23000 days SHOW_LIVE_PRESET Reports the current live time preset in units of 20 ms 50 ticks s See also CLEAR_PRESETS and SET_LIVE_PRESET Responses G0000000000075 lt CR gt Live time preset reported as disabled G0000000001076 lt CR gt Live time preset reported as tick G4294967295132 lt CR gt Live time preset reported as 4294967295 ticks SHOW_LIVE_REMAINING Reports the current live time remaining in units of 20 ms 50 ticks s See also SET_LIVE_REMAINING Responses G0000000000075 lt CR gt Live time remaining reported as disabled G0000000001076 lt CR gt Live time remaining reported as 1 tick G4294967295132 lt CR gt Live time remaining reported as 4294967295 ticks SHOW_LLD Shows the lower level discriminator setting See also SET_LLD Responses C00050092 The LLD is 50 SHOW_MODE Reports the current mode of operation PHA List or Sample InSight Virtual Oscillo scope See also SET MODE PHA and SET MODE SAMPLE Responses FPHA lt CR gt PHA mode FLIS lt CR gt List mode FSAM lt CR gt Sample mode InSight SHOW MONI LABEL num Returns with an ASCII string label designation for the monitor num AMETEK 54 ADVANCED MEASUREMENT TECHNOLOGY 932540 0314
33. e MCB Example Response FEATURES 00003774783 01083064332 00195036416 00000050313 SHOW_GAIN_ADJUST Returns the gain stabilizer amplifier setting www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 4 9 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 SHOW GAIN CHANNEL Reports the current center channel for the stabilizer gain peak See also SET GAIN CHANNEL Responses C00000087 CR Gain channel has not been set C00002089 lt CR gt Gain channel is channel 2 lowest possible channel C16382107 lt CR gt Gain channel is channel 16382 highest possible channel SHOW_GAIN_COARSE Returns the coarse gain for the IDM 200 internal amplifier which is always 1 In operation the resulting signal gain is the product of the coarse gain the fine gain and the super fine gain used by stabilizer Responses C00001088 lt CR gt Coarse gain reported as 1 SHOW_GAIN_CONVERSION This command returns the conversion gain Responses C00512095 lt CR gt Conversion gain reported as 512 channels C01024094 lt CR gt Conversion gain reported as 1024 channels C02048101 lt CR gt Conversion gain reported as 2048 channels C04096106 lt CR gt Conversion gain reported as 4096 channels C08192107 lt CR gt Conversion gain reported as 8192 channels C16384109
34. e cryostat no molecular sieve Internal Compensated Geiger M ller Tube LND 7149 Geiger M ller tube GM tube specifi cations are available on request Gamma Dose Rate Determination The IDM 200 uses two detectors to determine the gamma dose rate over a wide range from 0 05 uSv h to gt 10000 uSv h a dose rate range of around six decades For low dose rates below 20 uS v h the dose rate is determined from the Ge detector spectrum For dose rates above this value the internal compensated GM tube is used The IDM 200 switches between the two automatically NOTE The dose rate function in the IDM 200 should not be considered as adequate for accurate dosimetry purposes Its primary purpose is to protect the IDM 200 user from high radiation fields Cooler High reliability low power Stirling cooler Power usage when cold 2 A Initial cooldown time depends on ambient temperature but at 25 C is typically 15 hours System Gain Settings 0 45 to 1 System Conversion Gain Software selectable from 512 to 16384 channels Shaping Time Constants e Rise time Default Mode 3 4 us fixed MCA Mode 3 2 us to 23 Flattop Default Mode 0 8 us width fixed MCA Mode 0 3 us to 2 4 us width Dead Time Correction Extended live time correction according to Gedcke Hale method Accuracy area of reference peak changes lt 3 from 0 to 50000 cps Subject to change without notice radiation fields from extended sources e g
35. e ion pump voltage oooo the ion pump current pppp the stabilizer percentage in units of 0 1 AMETEK 60 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES the battery state 0 charging 1 external power not charging 2 internal battery gain stabilizer state 1 on 0 off q r SHOW ZERO ADJ Returns the value of the zero offset for the zero stabilizer SHOW ZERO CHANNEL Reports the center channel for the stabilizer zero peak See also SET ZERO CHANNEL SET ZERO WIDTH and SHOW ZERO WIDTH Responses C00000087 CR Zero channel has not been set C00002089 lt CR gt Zero channel is channel 2 lowest possible channel C16382107 lt CR gt Zero channel is channel 16382 highest possible channel SHOW_ZERO_STABILIZATION Reports the state of zero peak stabilization See also ENABLE_ZERO_STABILIZATION and DISABLE_ZERO_STABILIZATION Responses IT lt CR gt Zero stabilization is currently enabled IF lt CR gt Zero stabilization is currently disabled SHOW_ZERO_WIDTH Reports the current width for the stabilizer zero peak See also SET_ZERO_WIDTH SET_ZERO_CHANNEL and SHOW_ZERO_CHANNEL Responses C00001088 lt CR gt Zero width has not been set C00003089 lt CR gt Zero width is 3 channels lowest possible width C00256100 lt CR gt Zero width is 256 channels highest possible width in Gauss mode C16383108 lt CR gt Zero width is 16383 channels highest possib
36. ed This level establishes an upper level cutoff by channel number for storage 3 5 Stabilizer The IDM 200 has both a gain Properties for P1D1 7729 stabilizer and a zero stabilizer The Stabilizer tab Fig 9 shows the current values for the stabilizers The value in each Adjustment section shows how much adjust gros NN Cl MN ment is currently applied The width 1 Width 1 Initialize buttons set the adjust Suggest GEHE ment to 0 If the value approaches Adusiment 90 or above the amplifier gain Initialize 0 Initialize 0 should be adjusted so the stabilizer can continue to function when the adjustment value reaches 100 the stabilizer cannot make further Fig 9 Stabilizer Tab corrections in that direction The Center Channel and Width fields show the peak currently used for stabilization Amplifier Ampliier2 AmpliierPRO ADC Stabilizer High Voltage About Status Presets Gain Stabilization Enabled Zero Stabilization Enabled To enable the stabilizer enter the Center Channel and Width values manually or click on the Suggest Region button Suggest Region reads the position of the marker and inserts values into the fields If the marker is in an ROI the limits of the ROI are used If the marker is not in an ROI the center channel is the marker channel and the width is 3 times the FWHM at this energy Now click on the appropriate Enabled checkbox to turn the stabilizer
37. er Typically used only for troubleshooting ENAB COUNT LIST x In the List Mode data stream data from the external inputs can either be returned as a counter or a level This command sets the specified input to be used as a Counter 0 EXTERNAL 1 1 EXTERNAL 2 See also DISA COUNT LIST ENABLE GAIN STABILIZATION Enables the stabilization of the gain peak by the previously selected method either Gauss mode or point mode see SET MODE GAUSS and SET MODE POINT See also DISABLE GAIN STABILIZATION SHOW GAIN STABILIZATION and INITIALIZE GAIN STABILIZATION ENABLE HV Turns on the high voltage See also DISABLE HV and SHOW HV ENABLE ZERO STABILIZATION Enables the stabilization of the zero peak by the previously selected method either Gauss mode or point mode see SET MODE GAUSS and SET MODE POINT See also DISABLE ZERO STABILIZATION SHOW ZERO STABILIZATION and INITIALIZE ZERO STABILIZATION www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 3 9 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 INITIALIZE Returns the IDM 200 to the factory default settings INITIALIZE_GAIN_STABILIZATION Resets the gain peak stabilization adjustment to unity no adjustment This value is reported as 2048 by the SHOW_GAIN_ADJUSTMENT command See also SET_GAIN_ AD
38. er ring of On Off button steady on for at least 48 hours every month Failure to do this may result in degraded performance or cooling system failure This instrument uses a Stirling cycle refrigerator and all metal sealed cryostat designed for long operational life The vacuum integrity inside the cryostat is maintained by getters which sca venge traces of residual material when cold and by an ion pump that operates when the instru ment is powered up These two techniques maintain the system vacuum in peak condition during Note that these thresholds cannot be set within ORTEC spectroscopy applications such as MAESTRO AMETEK 28 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 5 SPECIFICATIONS normal use A good vacuum yields rapid cooldown and ensures operation at the high end of the instrument s operating temperature range Over time in any cryostat system residual contaminants can be released from the materials inside the evacuated cryostat by a process called outgassing It has become apparent that in extended storage the vacuum in our mechanically cooled identifiers may degrade to the point that on trying to restart the gas load inside the cryostat is too high and the unit fails to cool The remedy is straightforward if inconvenient a pump and bake of the instrument is required at an ORTEC service center Fortunately you can easily avoid this problem We strongly recommend that instruments used only
39. ernal battery the IDM 200 relies on external power until the external voltage drops below 9 V It then switches to the internal battery The instrument makes the transition smoothly and there is no effect on the energy resolution If you begin with both batteries fully charged the sum of the two battery capacities will be achieved If the external battery has its own charge indicator this can be used to determine when the www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 9 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 10 changeover will occur The IDM 200 battery monitor indicates the available capacity in the internal battery and when the switchover occurs this indicator runs down in the usual manner NOTE When all power is exhausted the high voltage and cooler shut down and the detec tor begins to warm The IDM 200 cannot be used again until the unit has cooled enough that the high voltage automatically switches on and the outer edge of the On Off button illuminates steady on indicating the unit is ready for use 2 10 Operating Cautions and Notes Remember that there are no user serviceable parts inside the IDM 200 Opening the IDM 200 except the battery hatch to replace the internal battery voids the warranty The cooler and detector are shoc
40. es you make to the various hardware settings e g amplifier stabilizers presets returning it to service as a system component is easy Just cycle the instrument s power off on then re run the gain stabilizer setup application Section 2 7 3 1 Amplifier Figure 5 shows the Amplifier tab Properties for P1D1 7729 which displays the Fine Gain B li R d Pole 7 Stabilizer High Voltage About Status Presets aseline Restore and Pole Zero Amplifier Amplifier2 AmplifierPRO abc controls Gain 0 79 Baseline Restore Pole Zero 2450 3 1 1 Gain as zl ij Set the amplifier Fine gain with the 0 7899 horizontal slider bar the edit box Coarse in range of 0 45 1 00 The Coarse gain has only an 1 setting 3 1 2 Baseline Restore The Baseline Restore is used to Fig 5 Amplifier Tab return the baseline of the pulses to the true zero between incoming pulses This improves the resolution by removing low frequency noise from dc shifts or mains power ac pickup The baseline settings control the time constant of the circuit that returns the baseline to zero There are three fixed choices Auto Fast and Slow the default for the IDM 200 is Fast The fast setting is used for high count rates the slow In MAESTRO GammavVision etc the Download Spectra and View ZDT Corrected commands on the Acquire menu and the Smooth and Strip commands on the Calculate menu are disabled for
41. ety Instructions and Symbols This manual contains up to three levels of safety instructions that must be observed in order to avoid personal injury and or damage to equipment or other property These are DANGER Indicates a hazard that could result in death or serious bodily harm if the safety instruction is not observed WARNING Indicates a hazard that could result in bodily harm if the safety instruction is not observed CAUTION Indicates a hazard that could result in property damage if the safety instruction is not observed In addition the following symbols may appear on the product AN DANGER High Voltage N ATTENTION Refer to Manual Please read all safety instructions carefully and make sure you understand them fully before attempting to use this product Cleaning Instructions To clean the instrument exterior Disconnect the instrument from the power source Remove loose dust on the outside of the instrument with a lint free cloth Remove remaining dirt with a lint free cloth dampened in a general purpose detergent and water solution Do not use abrasive cleaners Allow the instrument to dry completely before reconnecting it to the power source www ortec online com Tel 865 482 4411 ee 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A Vil For International Office Locations Visit Our Website AMETEK viii ADVANCED MEASUREMENT TECHNOLOGY 1
42. f counts in the ROI integral may exceed the preset value by up to 512 counts due to the pipelined archi tecture of the IDM 200 Setting an integral preset to 0 counts disables the preset The integral preset may be set to from 0 disabled to 4294967295 counts See also CLEAR PRESETS and SHOW INTEGRAL PRESET SET LENGTH SAMPLE length Sets the number of points in the Insight mode display to the specified value Normally this setting would remain at 1000 SET LIVE ticks Sets the live time counter to the specified number of ticks The number represents live time in units of 20 ms 50 ticks s Normally this value is set by the IDM 200 during data acquisi tion See also CLEAR COUNTERS and SHOW LIVE SET LIVE PRESET ticks Sets the live time preset to the specified number of ticks 20 ms tick During data acquisi tion when the live time counter reaches the preset number of ticks the preset is complete and the acquisition is stopped The preset should always be set to a multiple of 1 second Setting a live time preset to 0 ticks disables the preset See also CLEAR PRESETS and SHOW LIVE PRESET SET LLD chan Sets the lower level discriminator to chan which must be between 0 and 16383 See also SHOW LLD SET MODE LIST Sets the IDM 200 to list mode See also SHOW MODE SET MODE PHA The mode is set to PHA AMETEK 44 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES SET_MODE_SAMPLE Starts InSight Vi
43. from a container full of NORM or far field point sources gt 1 ft 0 3 m from the instrument the precise location of the detector in use is not important When point sources are close to the instrument the detector readings might not be in agreement because they are in different places within the instrument and the dose rate is varying rapidly with position Ron Jenkins W Gould and Dale Gedcke Quantitative X Ray Spectrometry New York Marcel Dekker Inc 1981 pp 266 267 25 IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Linearity Integral Nonlinearity lt 0 025 over top 99 5 of spectrum measured with a mixed source at 5 9 keV to Y at 1836 keV Differential Nonlinearity lt 1 measured with a BNC pulser and ramp generator over top 99 of range Overload Recovery At maximum gain recovers to within 2 of rated output from x1000 overload in 2 5 non overloaded pulse widths measured using our InSight Virtual Oscilloscope Pulse Pileup Rejector Automatically set threshold Pulse pair resolution typically 500 ns Low Frequency Rejector LFR Filter When set to ON removes low frequency lt 3 kHz input noise from spectrum Designed to reduce microphonic and low frequency periodic noise from surrounding electronics and equipment or ground loops Presets Multiple presets can be set within MAESTRO for any or all of the following Real Time Stops data collection when
44. gh voltage setting if the high voltage is disabled sssss represents the status of the high voltage bias supply as a 16 bit decimal number with the following bit definitions Bit 0 LSB Bias supply polarity O positive 1 negative Bit 1 Bias supply overload O overload 1 normal Bit 2 High voltage enabled O disabled 1 enabled Example Responses D0200000003077 lt CR gt 2000 V negative not overloaded disabled D0200000002076 lt CR gt 2000 V positive not overloaded disabled D0200000007082 lt CR gt 2000 V negative not overloaded enabled SHOW_HV_ACTUAL Returns the value of HV actually on the detector SHOW_HV_HEALTH Returns the status of the state of health for the detector as reported by the DIM or SMART 1 www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 5 1 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 SHOW_HV_POLARITY Always returns a positive record for the IDM 200 FPOS lt CR gt The is set to positive SHOW_HV_TARGET Under normal operation the HV will go to this value when the HV is enabled Reports the current HV setting see SET_HV and the status of the HV power supply in the form DvvvvvsssssccccCR where vvvvv represents the HV setting and sssss represents the status of the HV bias supply as a 16 bit decimal
45. hangeable Detector Module Hardware Manual 932540B 0314 Responses G0000000000075 lt CR gt True time remaining reported as disabled G0000000001076 lt CR gt True time remaining reported as 1 tick G4294967295132 lt CR gt True time remaining reported as 4294967295 ticks SHOW_ULD Returns the value of the ULD in channels as a C record SHOW_VERSION Reports the IDM 200 firmware version number in the form FDETx vvv lt CR gt where the DETx string designates the model and vvv designates the firmware version In the model string x is M for the IDM 200 Example Responses FDETM 002 lt CR gt Model IDM 200 firmware version 2 reported SHOW_VMON 3 Returns the major detector and HV state of health parameters as a F response in a comma delimited string as follows aaaa bbb bb c cc dddd eeee ffff g hh iii jjj Kkk Kkk lll llomm m nnnn oooo pppp q r where the battery time remaining in minutes bbb bb the gamma dose in microSieverts the cooler drive in volts dddd the actual HV in volts eeee the target HV in volts ffff the HV Status word see SHOW HV g cooler on off state 1 on 0 off hh the 3 3V voltage in units of 0 1V the 12V voltage in units of 0 1V jjj the 12V voltage in units of 0 1V kkk kk the detector temperature in kelvins the detector cold tip temperature in kelvins mm m the detector body temperature in degrees Celsius nnnn th
46. hat can be stored in a 31 bit channel Responses G0000000000075 lt CR gt Maximum count in an ROI channel is zero or no ROI channels were found G0000000001076 lt CR gt Maximum count in an ROI channel is 1 G2147483646120 lt CR gt Maximum count in an ROI channel is 2147483646 G2147483647121 lt CR gt Maximum count in an ROI channel is 2147483647 www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 5 5 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 SHOW_PEAK_CHANNEL This command returns the number of the ROI channel with the largest number of counts An ROI channel is a channel that has the ROI flag set The lowest number ROI channel with the largest count is reported if more that one channel contains the largest number of counts Channel 32767 is the highest numbered channel in any device Responses C00000087 lt CR gt Maximum count was found in channel 0 or no ROI channels were found see errors below C00001088 lt CR gt Maximum count was found in channel 1 C16383108 lt CR gt Maximum count was found in channel 16383 SHOW PEAK PRESET Reports the value of the ROI peak preset See SET PEAK PRESET for information about the ROI peak preset Responses G0000000000075 lt CR gt Peak preset disabled G0000000001076 lt CR gt Peak preset set to 1
47. he RT Word It reports the number of counts registered in the Geiger M ller tube in the preceding 10 ms the GM tube specification is on page 25 www ortec online com Tel 865 482 4411 ortec info ametek com 801 South Ilinois Ave Oak Ridge TN 37831 0895 U S A 33 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Intentionally blank AMETEK 34 ADVANCED MEASUREMENT TECHNOLOGY 7 FIRMWARE COMMANDS AND RESPONSES Most software communication with the IDM 200 will be through the CONNECTIONS software layer CONNECTIONS is used by all ORTEC software and can be accessed for other software development with our CONNECTIONS Programmer s Toolkit with Microsoft ActiveX Controls A11 B32 Use the DLL interface call MIOComm or the ActiveX control UCONN s Comm method to send commands to instruments and receive responses 7 1 Command Format The commands consist of a command header that may be followed by numeric parameter values The header consists of a verb a verb and noun or a verb noun and modifier each separated by underscores The first four letters of a word in a command will always be enough to uniquely identify that word when composing commands for the instrument For example the command ENABLE_GAIN_STABILIZATION can be abbreviated to ENAB_GAIN_STAB Numeric parameters are unsigned integer numbers that follow the command header
48. ias supply overload O overload 1 normal Bit 2 High voltage enabled O disabled 1 enabled Bit 3 Unused Bit 4 Amplifier PZ d since initialization O normal 1 2needs PZ ing Bit 5 Optimization since initialization O normal 1 needed Bits 6 7 Unused Bit 8 Amplifier automatic PZ 1 Auto PZ in progress 0 normal Bit 9 Optimization O normal 1 progress Bits 10 14 Unused Bit 15 MSB Reserved SHOW THRESHOLD AUX n Returns the threshold setting for EXTERNAL 1 n 0 and EXTERNAL 2 n 1 inputs SHOW TIME Reports the time from the battery backed up system clock in the form Nhhhmmmssscce lt CR gt where hhh represents 3 digit integer hour 0 23 mmm represents 3 digit integer minute 0 59 and sss represents 3 digit integer second 0 59 See also SET TIME SET DATE and SHOW_DATE Example Responses N010054017052 lt CR gt Time returned 10 54 17 10 h 54 min 17 s N020013037050 lt CR gt Time returned 20 13 37 20 h 13 min 37 s SHOW_TIME_START Reports the time of the last START command in the form Nhhhmmmssscce lt CR gt AMETEK 58 ADVANCED MEASUREMENT TECHNOLOGY 932540 0314 7 FIRMWARE COMMANDS AND RESPONSES where hhh represents 3 digit integer hour 0 through 23 mmm represents a 3 digit integer minute 0 through 59 and sss represents a 3 digit integer second 0 through 59 See also SET_TIME_START SET_DATE_START and SHOW_DATE_START Example Responses N01005401705
49. ill govern how con nection and disconnection are handled If you are using the instrument as a benchtop MCA with MAESTRO or other ORTEC spectroscopy applications and disconnect from the PC during data acquisition leaving the IDM 200 under power so that the high voltage stays on the IDM 200 will continue data collection To redisplay the spectrum in your spectroscopy application simply reconnect the IDM 200 then close and reopen the spectrum window for that input 2 9 Notes on IDM 200 Power Usage The IDM 200 uses internal and external power as follows The internal battery provides gt 2 hours of operation The internal battery can start the cooler however it cannot completely cool the detector from room temperature exter nal power is required The transition from internal to external power is automatic and does not interfere with data collection When recharging an exhausted internal battery keep in mind that the battery does not begin charging until after the detector is cooled down to operating temperature cooldown nominally takes lt 15 hours At that point fully recharging the battery takes 3 4 hours The power adaptor provides external power to simultaneously start and operate the IDM 200 as well as charge the internal battery Other external power supplied by external battery belt or 12 V automobile battery can start cool and operate the IDM 200 as well as charge the internal battery When con nected to an ext
50. it unsigned number IT lt CR gt True response to SHOW command no checksum IF lt CR gt False response to a SHOW command no checksum Jxxxxxyyyyy ccccCR Response to SHOW CONFIGURATION command Mxxxxxxxxxx ccc CR Response to SHOW STATUS command Nxxxyyyzzzccc lt CR gt yyy and zzz are 8 bit unsigned numbers 7 2 2 Command Catalog This section lists each command with a description of its operation This section lists each com mand with a description of its operation The descriptions include a list of any error codes that may result As described in the two preceding sections the usual response is a macro error code of 0 and a micro error code of 0 no errors Though syntax and communication error responses may result from any command in practice these error responses rarely occur on systems with reliable communication hardware running debugged software In the following catalog the commands are listed in alphabetical order each starting with a com mand prototype line Upper case letters numeric digits blank spaces and special symbols such as the underscore _ and comma in the prototype line are literal text to be sent to the MCB exactly as they appear Lower case letters in the prototype line represent numeric values as described in the accompanying text and should not be sent literally to the MCB but should be replaced by an appropriate numeric value Lower case letters enclosed in quotes represent
51. just the top of the quasi trapezoid The Width adjusts the extent of the flattop from 0 3 to 2 4 us The Tilt adjustment varies the flatness of this section slightly The Tilt can be positive or negative range 1 0 to 0 99219 Choosing a positive value results in a flattop that slopes downward choosing a negative value gives an upward slope The dead time per pulse is approximately 3 x Rise Time 2 x Flattop Width When you are satisfied with the settings Close the Properties dialog and prepare to acquire data Once data acquisition is underway the advanced user might wish to return to the Amplifier 2 tab and use InSight mode to adjust the shaping parameters interactively with a waveform showing the actual pulse shape www ortec online com Tel 865 482 4411 _ ortec info ametek 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 1 5 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 3 3 Amplifier PRO Figure 7 shows the Amplifier PRO Properties for P1D1 7729 tab which contains the Low Fre quency Rejector LFR filter Turning it off causes shifting and or broadening of peaks in addition to the acquisition of noise in the lowest energy channels We strongly recom mend the LFR be enabled during all data acquisitions Note however that you must turn the LFR off to pole zero the IDM 200 Subsequent meas
52. k sensitive with a maximum tolerance of 20 g so be careful not to drop the unit A shock in excess of this value will void the warranty The IDM 200 must be protected from exposure to moisture and dust Allow air to circulate freely around the unit to dissipate heat from the cooler The power adaptor charger should not be exposed to water and should generally be pro tected from moisture and dirt Make sure the recharging connector on both the IDM 200 and power adaptor are clean and dry before attaching to an the input power supply The IDM 200 is designed for use at temperatures between 10 C to 50 C at a relative humidity 100 non condensing The HPGe detector assembly is designed to be continuously cooled If the instrument is turned off and allowed to warm between uses it must be cooled and brought to opera tional status outer edge of On Off button steady on for at least 48 hours every month Failure to do this may result in degraded performance or cooling system failure Read Section 5 5 To avoid damaging the cooler and where applicable to comply with transportation regu lations be sure to turn the IDM 200 off before packaging and shipping the IDM 200 The unit can be shipped as soon as the cooler is turned off there is no need to wait until the detector warms up AMETEK ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 2 GETTING STARTED e If using a USB cable with a threaded cap such as the cab
53. le suppled with the IDM 200 be sure the cable is oriented and inserted correctly in the USB port before tightening the threaded cap otherwise the port receptacle may be damaged and require factory repair www ortec online com Tel 865 482 4411 801 South Ilinois Ave Oak Ridge TN 37831 0895 U S A 1 1 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Intentionally blank AMETEK 12 ADVANCED MEASUREMENT TECHNOLOGY 3 MCB PROPERTIES IN MAESTRO The IDM 200 was designed as a detector subsystem for applications such as portal monitoring However when you connect it to a Windows 7 PC running an ORTEC spectroscopy application such MAESTRO you can use the it as a high performance HPGe spectrometer digital MCA This section discusses the hardware setup dialogs you will see within MAESTRO when you use the MCB Properties command on the Acquire menu The MCB Properties dialog contains all of the instrument controls including acquisition presets amplifier gain adjustments pole zero controls high voltage monitor hardware status indicators and access to the InSight Virtual Oscilloscope For more details on use see the MAESTRO User s Manual NOTES The changes you make on most property tabs take place immediately There is no cancel or undo option for this dialog Returning to service No matter the chang
54. le width in point mode with zero channel set to 8192 START seg mask Starts the acquisition of spectral data The optional segment mask is provided for compati bility with other MCBs and may be any value from 0 to 65535 but is ignored by the IDM 200 www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 6 1 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 STOP seg mask Stops the acquisition of spectral data The optional segment mask is provided for compatibility with other MCBs and may be any value from 0 to 65535 but is ignored AMETEK 62 ADVANCED MEASUREMENT TECHNOLOGY 8 CHANGING THE INTERNAL BATTERY The typical service life of the IDM 200 s 14 4 lithium ion battery is 3 5 years When the internal battery no longer retains a charge it must be replaced with the appropriate ORTEC battery replacement kit This is a straightforward operation that takes just a few minutes so the detector does not significantly warm up during the procedure When connected to external power the detector will be cooled to operating temperature first then the new battery will charge typically reaching full charge within 3 4 hours For more information contact your ORTEC representative or our Global Service Center To change the battery 1 Remove the eight 8 s
55. leTime for more information about the 64 bit time format contained in these words In the case where the data acquisition program does not get all of the data from the spectrometer the data block will not contain a hardware time word In this case the data acquisition program must immediately request another block of data from the spectrometer in order to find the corre sponding hardware time stamp Note that the second block will begin with another CONNEC TIONS time stamp which will correspond to another hardware time word The data acquisition program must associate the first CONNECTIONS time stamp to the first hardware time word and the second CONNECTIONS time stamp to the second hardware time word even though the first hardware time word appears after the second CONNECTIONS time stamp For example if you request 16384 words and the first returned word is 65532 indicating that 16380 data words plus 4 overhead words were returned you should immediately request another block of data 31 IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 The IDM 200 has buffer storage for up to 96k 32 bit words Therefore six requests may be needed to drain the buffer and find all of the hardware time words In practice a program buffer of 96k words would always hold enough data to drain an instrument buffer assuming that all six requests were made in less than 1 second The following tables describe the format for the lis
56. lt CR gt Conversion gain reported as 16384 channels SHOW_GAIN_FINE Returns the current fine gain setting See SET_GAIN_FINE Sample Response GAIN_FINE 0000000000000 5 Gain is 0 5 SHOW_GAIN_POLARITY Returns the polarity of the amplifier input as F records Responses INEG lt CR gt The amplifier input is set to negative IPOS lt CR gt The amplifier input is set to positive AMETEK 50 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES SHOW_GAIN_STABILIZATION Reports the state of gain peak stabilization See also ENABLE_GAIN_STABILIZATION and DISABLE_GAIN_STABILIZATION Responses IT lt CR gt Gain stabilization is currently enabled IF lt CR gt Gain stabilization is currently disabled SHOW_GAIN_WIDTH Reports the current width for the stabilizer gain peak See also SET_GAIN_WIDTH SET_GAIN_CHANNEL and SHOW_GAIN_CHANNEL Responses C00001088 lt CR gt Gain width has not been set C00003089 lt CR gt Gain width is 3 channels lowest possible width C00256100 lt CR gt Gain width is 256 channels highest possible width in Gauss mode C16383108 lt CR gt Gain width is 16383 channels highest possible width in point mode with gain channel set to 8192 SHOW HV Reports the current high voltage and the status of the high voltage power supply in the form DvvvvvsssssccccCR where vvvvv represents the current output voltage if the high voltage is enabled or the rear panel hi
57. ment and should survive reasonable levels of mechanical abuse It has been drop tested to destruction in development and is known to have a high degree of survivability to normal shock and vibration If the instrument is dropped Disconnect from any external power source disconnect any USB connection and cycle the power off on It should turn on and return to ready status outer ring of On Off button illuminated steady on immediately Inspect the exterior for evidence of mechanical damage or distortion Listen to the cooler If you hear any unusual noises rattling or pinging emanating from the cooler contact your ORTEC representative or our Global Service Center Monitor the unit for the next few hours to ensure that it remains ready outer ring of On Off button illuminated steady on and performs as expected with test sources If the unit fails in one or more of these respects or if one or more hardware diagnostic settings Section 3 8 indicate a hardware failure contact your representative or our Global 23 IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Service Center for further assistance Remember that there are no user serviceable parts inside the IDM 200 and opening the case will void the warranty 4 3 If the IDM 200 Will Not Turn On Connect the IDM 200 to an external power source it should automatically boot up turn the cooler on and start the IDM 200
58. ments not in warranty should follow the same procedure and ORTEC will provide a quotation Damage in Transit Shipments should be examined immediately upon receipt for evidence of external or concealed damage The carrier making delivery should be notified immediately of any such damage since the carrier is normally liable for damage in shipment Packing materials waybills and other such documentation should be preserved in order to establish claims After such notification to the carrier please notify ORTEC of the circumstances so that assistance can be provided in making damage claims and in providing replacement equipment if necessary Copyright 2014 Advanced Measurement Technology Inc All rights reserved ORTEC is a registered trademark of Advanced Measurement Technology Inc All other trademarks used herein are the property of their respective owners NOTICE OF PROPRIETARY PROPERTY This document and the information contained in it are the proprietary property of AMETEK Inc ORTEC Business Unit It may not be copied or used in any manner nor may any of the information in or upon it be used for any purpose without the express written consent of an authorized agent of AMETEK Inc ORTEC Business Unit ADDITIONAL WARRANTY STATEMENT The IDM 200 contains no user serviceable parts Except for the battery hatch on the left side panel which can be opened when the battery requires replacement breaking the seal on the case voids your
59. ng additional device drivers and troubleshooting 1 Make sure the IDM 200 is connected and powered on Otherwise the MCB Configuration program will not detect it during installation Any instruments not detected can be configured at a later time 2 Enter mcb con in the search programs and files box then click on the MCB Configura tion search result or open the Windows Start menu and select MAESTRO MCB Configuration 3 The MCB Configuration program will locate all of the powered on ORTEC MCBs the local PC and the network display the Master Instrument List of instruments found Fig 3 www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 7 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 2 6 1 Configuring a New Instrument The first time a new instrument is detected the dialog shown in Fig 4 will remind you that all new instruments must be assigned a unique non zero ID number Click on OK See the CON NECTIONS Driver Update Kit for instructions on customizing ID Numbers and Descriptions or simply click on the Renumber New button to renumber only the new instruments NOTE We strongly recommend not using the Renumber All button Configure Instruments Version 7 03 Number amp Description IDM 200 Cab 1 Shelf 1 IDM 200 Cab 1 Shelf 2
60. ng of the acquisition LT Words are created by the spectrometer at the same time as are RT Words The 30 bit live time stamp represents the ADC live seconds since the beginning of the acquisition or since the last CLEAR command By calculating the relative change in live time between any two LT Words in a list mode stream you can calculate the live time for a given block of data 10 ms The ADC CRM Word is generated at the same time as the RT Word and always appears just after the LT Word in the list data This word reports the number of gamma rays detected in the preceding 10 ms The count is incremented each time the ADC fast channel detects a pulse Since many pulses may be rejected before one is converted into a valid ADC event this number is not the simple sum of the ADC events over the past 10 ms instead it represents the true input count rate during the 10 ms interval The Ext Counter Words are generated at the same time as the RT Word They represent the num ber of rising edges that arrived on the External inputs in the preceding 10 ms Note that an exter nal input must remain high for at least 40 ns for the pulse to be counted Optionally the external counters can be configured to be a simple level sensitive input see the ENAB_COUNT_LIST command on page 39 In this case the counter value is 0 or 1 depending on the level of the input at the time the counter word is generated The GM Counter Word is generated at the same time as t
61. number with the following bit definitions Bit 0 LSB Bias supply polarity O positive 1 negative Bit 1 Bias supply overload O overload 12normal Bit 2 HV enabled O disabled 1 enabled Example Responses D0200000003077 lt CR gt 2000 V negative not overloaded disabled D0200000002076 lt CR gt 2000 V positive not overloaded disabled D0200000007082 lt CR gt 2000 V negative not overloaded enabled SHOW_HV_POLARITY Always returns positive polarity for the IDM 200 Responses IPOS lt CR gt The HV is set to positive SHOW_INPUT Returns the state of the two external inputs Responses C00000087 lt CR gt Both external inputs are low less than the auxiliary threshold setting C00001088 lt CR gt EXTERNAL 1 is greater than its auxiliary threshold setting and EXTERNAL 2 is less than its threshold setting C00002089 lt CR gt EXTERNAL 2 is greater than its auxiliary threshold setting and EXTERNAL 1 is less than its threshold setting C00003090 lt CR gt Both external inputs are high greater than the auxiliary threshold setting SHOW INTEGRAL start_chan number_of_chans Reports the sum of the specified group of spectral data channels If start chan and number of chans is not provided SHOW INTEGRAL reports the sum of all channels in the currently selected segment that have their ROI flag set AMETEK 52 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES Responses
62. occasionally be turned on once a month fully cooled to ready status and allowed to run for at least 48 hours Doing this starts the ion pump and activates the internal getters ensuring that the vacuum is maintained in good condition As well as maintaining the vacuum this procedure keeps the system battery topped up and also provides peace of mind that the system will cool when required This is not to be confused with a vacuum leak although both result in a degradation of the vacuum www ortec online com Tel 865 482 4411 801 South Ilinois Ave Oak Ridge TN 37831 0895 U S A 29 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Intentionally blank AMETEK 30 ADVANCED MEASUREMENT TECHNOLOGY 6 LIST MODE The IDM 200 is equipped with a List Mode that is useful in real time monitoring applications Because of the widely varying requirements for a real time monitoring application no standard software is provided for collecting and analyzing List Mode data To enter List Mode issue the SET_MODE_LIST command use SET_MODE_PHA to exit List Mode This chapter provides details about the List Mode that will enable experienced programmers using the ORTEC CONNECTIONS Programmer s Toolkit with Microsoft ActiveX Controls A11 B32 to write a custom software application program that can collect List Mode d
63. on Until changed in this dialog the stabilizer will stay enabled even if the power is turned off When the stabilizer is enabled the Center Channel and Width cannot be changed For more detailed information on gain and zero stabilization see the MAESTRO User s Manual www ortec online com Tel 865 482 4411 _ ortec info ametek 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 17 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 3 6 High Voltage Figure 10 shows the High Voltage Properties for P1D1 7729 tab which allows you to turn the bi It ff don and montor Amplifier Amplifier 2 Amplifier PRO las voltage p x Stabilizer High Voltage About Status Presets the Actual bias You cannot adjust the bias voltage nor can you change _0 pun the Shutdown mode which is fixed Ott Actual 3804 Volts acsi as SMART Polarity c Fig 10 High Voltage Tab 3 7 About This tab Fig 11 displays hardware Properties for P1D1 7729 and firmware information about e Amplfier2 AmpliierPRO the IDM 200 as well as the data SHUT ERU BENED Status Presets Acquisition Start Time In addition P1D1 7729 the Access field shows whether the Detector is currently locked with a password by MAESTRO Read 65 Write indicates the Detector is un Temperature testing CO5
64. outh Illinois Ave Oak Ridge TN 37831 0895 U S A 47 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 where aaaaa represents the conversion gain for the one and only segment in the currently selected device and ccc represents the record checksum See the section on response records in this chapter for more information about response records and checksums SHOW_CONFIGURATION_MASK Returns two masks the first of which can be anded with data from the MCB to clear the ROI bit from the data When the second mask value 15 anded with data from the MCB the data bits are removed and only the ROI bit remains Response CONF_MASK 02147483647 02147483648 SHOW_COOLER Shows whether the cooler is on or off Responses IT lt CR gt Cooler is on enabled IF lt CR gt Cooler is off disabled SHOW_CORRECTION_FLAT Shows the flattop correction value See also SET_CORR_FLAT Responses CORR_FLAT 000000000000000 SHOW_CRM Returns the current reading of the count rate meter Response G0000050781096 Current input count rate is 50781 counts s SHOW_DATA_APPLICATION string If string matches string1 in a previous SET DATA APPLICATION command then string2 from that command is returned The response is a F record SHOW DATE Returns the day month and year of the current date as maintained in the battery backed up real time clock in
65. re gain stabilization can be enabled AMETEK 42 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES SET_GAIN_COARSE num Num always 1 for the IDM 200 See also SHOW_GAIN_COARSE SET_GAIN_CONVERSION chans Sets the conversion gain The conversion gain defines the number of channels within the device that will used for spectral data This has the effect of altering the resolution of the ADC from 14 bits conversion gain 16384 to 9 bits conversion gain 512 for the device See also SHOW_GAIN_CONVERSION Legal Commands SET GAIN CONVERSION 0 lt CR gt Conversion gain set to default 16384 SET GAIN CONVERSION 512 CR Conversion gain set to 512 channels SET GAIN CONVERSION 1024 lt CR gt Conversion gain set to 1024 channels SET GAIN CONVERSION 2048 lt CR gt Conversion gain set to 2048 channels SET GAIN CONVERSION 4096 lt CR gt Conversion gain set to 4096 channels SET GAIN CONVERSION 8192 lt CR gt Conversion gain set to 8192 channels SET GAIN CONVERSION 16384 lt CR gt Conversion gain set to 16384 channels SET GAIN FINE value This sets the fine gain to value Value is a floating point value from 0 45 to 1 0 See also SHOW GAIN FINE SET GAIN WIDTH chans Sets the width in channels for the stabilizer gain peak The gain width must be chosen such that the beginning channel is no lower than channel 0 and the ending channel is no higher than the maximum channel as determined by the conve
66. rsion gain The gain channel and width must be set before gain stabilization can be enabled The absolute minimum width for the gain peak is 3 channels and the absolute maximum width for the gain peak is 256 channels in Gauss mode In point mode there is no maximum peak width though the chosen width must allow the peak to fit within the device s channel limits as stated above See also SHOW GAIN WIDTH SET GAIN CHANNEL and SHOW GAIN CHANNEL SET HV value The HV in this unit is fixed SET ID lt id string gt Sets the sample id string This string can be up to 16 characters long and can be set to any arbitrary value The id string is intended to uniquely identify the sample being analyzed The id string is also set by the BARCODE command and is stored with each spectrum acquired in field mode See also SHOW ID www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 43 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Examples SET ID Site 123 SET ID Sample 123456789 SET INTEGRAL PRESET count Sets the ROI integral preset to the specified count During data acquisition when the sum of the counts contained in the channels that have the ROI flag set reaches the integral preset count the preset is complete and the acquisition is stopped The actual number o
67. rtual Oscilloscope mode SET_PEAK_PRESET count Sets the ROI peak preset to the specified count During data acquisition when the contents of any channel of a device that has the ROI flag set reaches the peak preset count the preset is complete and the acquisition 15 stopped The actual number of counts in the ROI peak may exceed the preset value by a small number of counts due to the pipelined architecture of the IDM 200 Setting a peak preset to 0 counts disables the preset The peak preset may be set to from 0 disabled to 2147483647 counts See also CLEAR PRESETS and SHOW PEAK _ PRESET SET ROI start chan number of chans Sets the ROI flags for the specified channels This command can be used multiple times to set ROI flags without affecting previously set flags ROI flags specify channels within a device that are considered for ROI integral and ROI peak presets SET ROI SAMPLE num Selects which controls signals are displayed as an ROI on the captured waveform Only a single bit can be turned on at a time The following signals can be selected with the associated bit Bit 0 Pileup reject Bit 1 Negative baseline threshold Bit 2 Baseline restorer gate Bit 3 Positive baseline threshold Bit 4 Busy Bit 5 Gate Bit 6 Reserved Bit 7 Peak detect Bit 8 Reserved SET SHAP FLAT value Sets the width of the flattop to value Value is in microseconds ranging from 0 3 to 2 4 in steps of 0 1 See also SHOW SHAP FLAT SET SHAP RISE
68. s tick During data acquisi tion when the true time counter reaches the preset number of ticks the preset is complete and the acquisition is stopped Setting a true time preset to O ticks disables the preset The preset should always be set to a multiple of one second See also CLEAR PRESETS and SHOW TRUE PRESET SET ULD value This sets the upper level discriminator to value in channels SET ZERO ADJUSTMENT value Sets the zero stabilization adjustment to an arbitrary value from 65535 to 65535 The total range of the adjustment value represents 256 channels This adjustment is usually only made by the gain stabilizer and reset to 0 with the INITIALIZE ZERO STABILIZATION command See also SHOW ZERO ADJUSTMENT SET ZERO CHANNEL chan Sets the center channel for the stabilizer zero peak If a zero channel is chosen such that the beginning channel or ending channel would be below channel 0 or above the maximum AMETEK 46 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES channel as determined by the conversion gain the zero peak width is reduced until the peak fits the device boundaries A zero channel and width must be set before zero stabilization can be enabled See also ENABLE _ZERO_ STABILIZATION SET ZERO WIDTH chans Sets the width in channels for the stabilizer zero peak The zero width must be chosen such that the beginning channel is no lower than channel 0 and the ending channel is no higher
69. separated by one or more spaces Specific commands require multiple parameters separated by commas that specify numeric quantities related to the operation of the MCB such as live time or conversion gain The command SET_WINDOW 0 8192 has two parameters 0 and 8192 which set the window of interest to start at channel 0 and continue for 8192 channels Some parameters are optional and are delimited by square brackets in the command prototype line to distinguish them from mandatory parameters e g SET WINDOW start length Com mands with optional parameters can be sent to the MCB without the optional parameters in which case the instrument behavior will be explained in the command description 7 2 Error Codes On each completion of the command the MCB returns a macro error code and micro error code The macro error code represents the general class of error with 0 meaning no error and the micro error code represents the sub class of error with 0 meaning no error In case of error con dition you can use the MIOGetLastError DLL interface or GetErrMajor GetErrMinor ActiveX control interface 35 IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 Macro error codes EUN ONE NN Power up just occurred Battery backed data lost 131 Command execution error Invalid Command For macro code 129 syntax error or 131 execution error the following apply Eo 15 malig hid parameter
70. software application The unit can start the cooler using internal battery power but must be connected to an external power source to fully cool a warm detector If the internal batteries have become exhausted but can still hold a charge see the next section Ifthe battery does not hold a charge ensure that it is properly installed If properly installed the battery must be replaced according to the instructions in Chapter 8 4 4 Troubleshooting MAESTRO Related Problems 4 4 1 MAESTRO Does Not Connect with the IDM 200 If properly installed and functioning MAESTRO software or other CONNECTIONS programs cannot find and communicate with the IDM 200 when it is connected via the USB port and being used as an MCA e Make sure the USB cable is competent and properly connected to both the IDM 200 and PC e Make sure USB hubs are correctly connected and functioning e Make sure the IDM 200 is turned on and ready for data acquisition On Off button light steady on Check the Master Instrument List on the PC to ensure that the IDM 200 is on the list If it is not listed manually run the MCB Configuration program from the Windows Start menu See the MAESTRO User s Manual for detailed instructions on this operation AMETEK 24 ADVANCED MEASUREMENT TECHNOLOGY 5 SPECIFICATIONS Gamma Ray Detector Internal coaxial HPGe detector P type high purity germanium Nominal 85 mm diameter x 30 mm deep All metal sealed long lif
71. strument must pass a stringent set of quality control tests designed to expose any flaws in materials or workmanship Permanent records of these tests are maintained for use in warranty repair and as a source of statistical information for design improvements Repair Service If it becomes necessary to return this instrument for repair it is essential that Customer Services be contacted in advance of its return so that a Return Authorization Number can be assigned to the unit Also ORTEC must be informed either in writing by telephone 865 482 4411 or by facsimile transmission 865 483 2133 of the nature of the fault of the instrument being returned and of the model serial and revision on rear panel numbers Failure to do so may cause unnecessary delays in getting the unit repaired The ORTEC standard procedure requires that instruments returned for repair pass the same quality control tests that are used for new production instruments Instruments that are returned should be packed so that they will withstand normal transit handling and must be shipped PREPAID via Air Parcel Post or United Parcel Service to the designated ORTEC repair center The address label and the package should include the Return Authorization Number assigned Instruments being returned that are damaged in transit due to inadequate packing will be repaired at the sender s expense and it will be the sender s responsibility to make claim with the shipper Instru
72. t Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 3 4 3 3 3 6 3 7 3 8 3 9 4 TROUBLESHOOTING 4 1 4 2 4 3 4 4 5 SPECIFICATIONS 5 1 3 2 39 5 4 5 5 6 LIST MODE 7 FIRMWARE COMMANDS AND RESPONSES Command Error Codes 7 2 1 Dollar Response Records 7 2 2 Command Catalog Js duds 8 CHANGING THE INTERNAL BATTERY Stabilizer High Voltage About Shipping the IDM 200 9 t 9 9 59 If the On Off Button Does Not Stop Flashing If You Drop the IDM 200 If the IDM 200 Will Not Turn On Troubleshooting MAESTRO Related Problems 4 4 1 MAESTRO Does Not Connect with the IDM 200 9 9 9 9 9 7 5 Electrical and Mechanical Connectors PC Prerequisites s hs 43445 54436 9 9 Long Term Shutdown Storage 9 9 o c 6 1 Spectrometer Data Format 932540B 0314 AMETEK ADVANCED MEASUREMENT TECHNOLOGY Saf
73. t mode data as returned by CONNECTIONS from the IDM 200 spectrometer Table 1 um List Mode Data Format 31 30 29 ADC Word 14 bit ADC value 16 bit real time in 200nS ticks RT Word ao 30 bit real time in 10 ms ticks LT Word 30 bit live time in 10 ms ticks Table 2 Spectrometer List Mode Data Format 24 23 16 15 ADC CRM Ext Counter 2 00000110 10 00000000 Counts per 10 ms Counts per 10 ms period GM Counter 00000111 00000000 Counts per 10 ms period IDM 200 Only The ADC Word contains a 14 bit ADC value and a 16 bit real time stamp The Hardware Time Word contains the same 16 bit real time stamp In both cases this value represents the time that the word was created as represented by an internal clock that increments every 200 ns The 200 ns clock rolls over from 49999 to 0 which gives it a period of 10 ms Every time the 200 ns clock rolls over a RT Word and LT Word are created The 30 bit real time stamp on the RT word corresponds to the number of times the 200 ns clock rolls over The 10 ms real time clock and AMETEK 32 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 CHAPTER 6 LIST MODE the 10 ms live time clocks are cleared when the CLEAR command is sent to the spectrometer Otherwise they increment every 10 ms while data is collecting Using the RT Word as a time standard and the 200 ns time stamps from the ADC Word you can determine the time that any ADC event occurred 200 ns relative to the beginni
74. tallation cats 8656 be reed ed eco SO 5 2 3 1 Step 1 Install the CONNECTIONS Driver Update 5 2 3 2 2 Install the MAESTRO MCA Emulation Software 6 2 3 3 Step 3 Install the IDM 200 Stabilizer Setup Application 6 2 4 Startup and Cooldown 6 2 9 Connect the IDM 200 to Your PC loas dk ies ee eC RR do Ron CR CR 7 2 6 Run MCB Configuration to Establish Communication with the IDM 200 7 2 6 1 Configuring New amp 2 7 Option Running the Stabilizer Setup 9 2 8 Connecting to and Disconnecting from the 9 2 9 Notes on IDM 200 Power 9 2 10 Operating Cautions and Notes 10 3 MCB PROPERTIES IN MAESTRO htt hh 13 o NE SUDO Mmm 13 MP 13 312 Bascline 13 3 13 Pole Zero Xd A HE ER eee 14 32 COME Ree ade 14 3 3 Amplifier UE RI RE 16 www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A y For International Office Locations Visi
75. than the maximum channel as determined by the conversion gain The zero channel and width must be set before zero stabilization can be enabled The absolute minimum width for the zero peak is 3 channels and the absolute maximum width for the zero peak is 256 channels in Gauss mode In point mode there is no maximum peak width though the chosen width must allow the peak to fit within the device s channel limits as stated above SHOW ACTIVE Returns a 1 if the IDM 200 is active i e acquiring spectral data or O if it is not active Responses C00000087 CR Not active C00001088 lt CR gt Active SHOW_BATT_LIFE Shows the remaining battery life in minutes SHOW_BLRE Shows the baseline restorer time constant in microseconds See also SET_BLRE Responses BLUE 000000000000091 Time constant is 91 us SHOW_BLRE_AUTOMATIC Shows whether automatic selection of the baseline restorer constant is off or on Responses IT lt CR gt Automatic baseline is enabled IF lt CR gt Automatic baseline is disabled SHOW_CONFIGURATION Returns a record that indicates the hardware configuration of the MCB The record contains information about the number of segments in an MCB device always 1 for the IDM 200 and the current conversion gain for each segment The record is organized as follows J1638400001aaaaa00000 65 zeros here for total of 75 zeros 00000ccc www ortec online com Tel 865 482 4411 801 S
76. the IDM 200 case that can be opened without voiding the warranty 2 3 Software Installation 2 3 1 Step 1 Install the CONNECTIONS Driver Update The first step is to install the CONNECTIONS Driver Update Kit on the host PC according to the kit s instruction sheet This product must be installed before your spectroscopy application is Note that these thresholds cannot be set within ORTEC spectroscopy applications such MAESTRO www ortec online com Tel 865 482 4411 801 South Illinois Ave Oak Ridge TN 37831 0895 U S A 5 For International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 installed On the Instrument Families page be sure to mark the USB based instruments check box Otherwise the IDM 200 will not be able to communicate with ORTEC applications 2 3 2 Step 2 Install the MAESTRO MCA Emulation Software Install MAESTRO on the host PC according to the instructions in its User s Manual 2 3 3 Step 3 Install the IDM 200 Stabilizer Setup Application If this instrument is a component in a larger system such as a portal monitor your system design may require you to run the accompanying Stabilizer Setup Application P N 797230 before it can be used in the larger system Install it according to its instruction sheet P N 932540 2 4 Startup and Cooldown Remove the IDM 200 from its shipping
77. the form dddmmmyyy The day is returned as a 3 digit integer number from 001 031 month as a 3 digit integer number from 001 012 and year as a 3 digit integer number from 000 099 See also SET DATE START AMETEK 48 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 7 FIRMWARE COMMANDS AND RESPONSES Responses N001001088052 lt CR gt Date reported as Jan 1 1988 N031012099059 lt CR gt Date reported as Dec 31 1999 N001001000036 lt CR gt Date reported as Jan 1 2000 N031012087056 lt CR gt Date reported as Dec 31 2087 SHOW_DATE_START Returns the day month and year of the acquisition start date in the form dddmmmyyy The day is returned as a 3 digit integer number from 001 031 month as a 3 digit integer number from 001 012 and year as 3 digit integer number from 000 099 See also SET_DATE_START Responses N001001088052 lt CR gt Date reported as Jan 1 1988 N031012099059 lt CR gt Date reported as Dec 31 1999 N001001000036 lt CR gt Date reported as Jan 1 2000 N031012087056 lt CR gt Date reported as Dec 31 2087 SHOW_DELAY_SAMPLE Shows the Delay Sample setting See also SET DELAY SAMPLE Responses C00003090 The sample number is 00003 and 090 is the checksum SHOW_DET_TEMP Shows detector temperature relative to factory set point in kelvins SHOW_DOSE Returns dose in microSieverts p Sv SHOW_FEATURES Responds with four 32 bit masks indicating which features are present in th
78. the instrument off for a brief period e g 10 to 20 minutes without significantly warming the detector As soon as the unit is powered up again it typically returns to ready status outer ring of On Off button illuminated steady on within a few seconds The IDM 200 can be restarted at any time without harming the detector crystal regardless of whether the detector is warm partially cooled or cooled to operating temperature The IDM 200 also has a remote power on off capability See the specification on page 27 in Chapter 5 2 5 Connect the IDM 200 to Your PC Attach the IDM 200 to a USB port on your PC Windows will display a series of new hard ware messages followed by the Found New Hardware wizard Choose to automatically locate the driver and do not search the internet for the driver In the unlikely event Windows cannot locate the driver it is in C Program Files Common Files ORTEC Shared UMCBI When all new hardware processing is finished you re ready to run the MCB Configuration program Section 2 6 2 6 Run MCB Configuration to Establish Communication with the IDM 200 NOTE This is a very abbreviated discussion of the operation and use of the MCB Configura tion program We strongly recommend that you read the instructions for the CONNEC TIONS Driver Update Kit for complete details on customizing MCB ID Numbers and Descriptions changing your Windows firewall settings to allow MCB access across a network enabli
79. the instrument tracks the maximum shock to which the unit has been subjected and a shock in excess of 20 g will void the warranty Ambient Operating Environment 10 C 50 C at a relative humidity 10046 non condensing Internal Battery Rechargeable nominal 14 4 V lithium ion battery pack Charging circuitry and battery management circuitry internal to the power adaptor charger Battery lifetime 3 5 years replacement kit available from ORTEC The compartment is semi sealed and protects against penetration of dirt and moisture See Chapter 8 for instructions on replacing the battery Battery Life When HPGe detector is cold gt 2 hours at 25 C 4 hour charge time Battery life can be extended indefinitely by the use of optional external battery belt The unit is expected to be kept running once cold Note that the internal battery charge can start the mechanical cooler but cannot fully cool a warm detector external power is required In addition an exhausted internal battery should be charged for 2 hours before the identifier is cooled using external power If the internal battery is com pletely exhausted but can still hold a charge see troubleshooting Section 4 3 Note that using an automobile battery to cool the detector could significantly discharge the auto battery CE Conforms to CE standards for radiated and conducted emissions susceptibility and low voltage power directives www ortec online com Tel 865 482 4
80. the real time reaches this value in increments of 1 s e LiveTime Stops data collection when the live time reaches this value in increments of 1 s e ROI Integral Integral count stops data collection when the sum of all ROI channels reaches this value e ROIPeak Peak count stops data acquisition when any ROI channel reaches this value maximum value of 2 1 counts 4 x10 5 1 Electrical and Mechanical Dimensions Maximum overall dimensions including handle Ge detector endcap neutron detector and shock absorbers 41 3 cm L x 34 0 cm W x 21 2 cm 16 3 in x 13 4 in x 8 3 in Weight 17 7 kg 39 Ib PPatent pending AMETEK 26 ADVANCED MEASUREMENT TECHNOLOGY 932540 0314 5 SPECIFICATIONS Input Power 10 to 17 V dc from battery dc power supply universal mains supply included Battery charger circuit is inside instrument Power Usage Greatest during cooldown 100 W While charging battery 5 A nominal Cold with fully charged battery 2 A Remote Power On Off Opto isolated input on pins 5 and 6 of the power connector turns off the IDM 200 if the input voltage exceeds 2 V Power is turned on if the voltage between the two pins is less than 0 25 V Power is on if pins are left disconnected The voltage on the pins should not exceed 24 V Input is not polarized Only the absolute voltage between the two pins is significant Input Impedance 2000 Maximum Shock Tolerance 20 g An accelerometer inside
81. ther assistance contact your ORTEC representative or our Global Service Center 3 9 Presets Figure 13 shows the Presets tab Properties for P1D1 7729 The presets can only be set when the IDM 200 is not acquiring data during acquisition the preset field backgrounds are gray indicating that RealTimefs they are inactive You can use any or all of the presets at one time To disable a preset enter a value of Peak zero If you disable all of the presets data acquisition will continue until manually stopped Amplifier 2 ADC Stabilizer High Voltage About Status Presets 60 00 Live Time 5 When more than one preset is enabled set to a non zero value Fig 13 Presets Tab the first condition met during the acquisition causes the Detector to stop This can be useful when you are analyzing samples of widely varying activity and do not know the general activity before counting For example the Live Time preset can be set so that sufficient counts can be obtained for proper calculation of the activity in the sample with the least activity But if the sample contains a large amount of this or another nuclide the dead time could be high resulting in a long counting time for the sample If you set the ROI Peak preset in addition to the Live Time preset the low level samples will be counted to the desired fixed live time while the very active samples will be counted for
82. urements can then be taken Stabilizer High Voltage About Status Presets Amplifier Amplifier2 Amplifier PRO apc Low Frequency Rejecter with the LFR filter on Fig 7 Amplifier PRO Tab 3 4 ADC This tab Fig 8 contains the Properties for P1D1 7729 Conversion Gain Lower Level 5 M Stabilizer High Voltage About Status Presets Discriminator and Upper Level Amplifier Ampliier2 Amplifier PRO ADC Discriminator controls In addition Conversion Gain 16384 the current real time live time and ij count rate are monitored at the Lower Level Disc 80 bottom of the dialog Upper Level Disc 116380 The Conversion Gain sets the max imum channel number in the spec Real Time Live Time trum If set to 16384 the energy 60 42 60 00 Count Rate 91 scale is divided into 16384 channels This parameter is entered in powers of 2 e g 8192 4096 2048 1024 Fig 8 ADC Tab 512 Patent pending AMETEK 1 6 ADVANCED MEASUREMENT TECHNOLOGY 932540B 0314 3 MCB PROPERTIES IN MAESTRO The Lower Level Discriminator sets the level of the lowest amplitude pulse that will be stored This level establishes a lower level cutoff by channel number for ADC conversions Because of the mechanical cooler we recommend a minimum setting of 40 in addition to leaving the LFR on at all times The Upper Level Discriminator sets the level of the highest amplitude pulse that will be stor
83. value Sets the rise time to value Value is in microseconds ranging from 3 2 to 23 in steps of 0 2 See also SHOW SHAP RISE www ortec online com Tel 865 482 4411 South Illinois Ave Oak Ridge TN 37831 0895 U S A 4 5 or International Office Locations Visit Our Website IDM 200 HPGe Interchangeable Detector Module Hardware Manual 932540B 0314 SET THRESH AUX value n Sets the threshold in volts for the top panel EXTERNAL 1 and EXTERNAL 2 inputs value ranges from 0 to 4 98 V n is 0 for EXTERNAL 1 and 1 for EXTERNAL 2 For example SET THRESH AUX 3 0 sets the threshold for EXTERNAL 1 to 0 3 V SET TIME hour min sec Sets the time stored in the battery backed up system clock to the specified values hour can be any value from 0 23 min and sec can be any value from 0 59 The current date and time are stored for a device when an acquisition is started See also SHOW TIME SET DATE SHOW DATE SET TIME START and SHOW TIME START SET TRIG SAMPLE setting Selects the triggering source in Insight Mode See LIST TRIG SAMP for legal trigger sources SET TRUE ticks Sets the true time counter to the specified number of ticks The number represents true time in units of 20 ms 50 ticks sec Normally this value is set by the IDM 200 during data acqui sition See also CLEAR COUNTERS and SHOW TRUE SET TRUE PRESET ticks Sets the true time preset to the specified number of ticks 20 m

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