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ORTEC

Detective-EX/DX

-100T Portable HPGe Spectrometer — User’s Manual

931040P / 1014

Figure 69. Configure the SNM
Search.

Figure 70. Enable the Ba-133
Search and Alarm Threshold.

5.2.7. Dose-Rate Units and Alarms

In all modes, the Detective-EX alarms audibly and visually at a gamma dose rate of
10,000

Sv/hr (1 rem/hr) and/or the neutron count rate >500 cps. Above these limits, the ID

Mode’s Found Nuclide screen reports the message

RDD Detected

. The Dose Alarms dialog

(Fig. 72) lets you optionally set lower thresholds for one or both types of radiation.

To set either Threshold, tap in the field to display the soft keyboard. Enter the desired value and
tap Set.

You can choose display the gamma dose rate in microSieverts per hour (

Sv/hr) or millirem per

hour (mrem/hr). The Dose Units status message updates immediately to reflect the new dose-
rate unit. To change units, tap either the

Sv/h or mrem/h radio button to mark it.

Содержание Detective-DX-100T

Страница 1: ...ORTEC Detective EX DX 100T Portable Neutron and Gamma Nuclide Identifier User s Manual Printed in U S A ORTEC Part No 931040 1014 Manual Revision P ...

Страница 2: ... of the nature of the fault of the instrument being returned and of the model serial and revision Rev on rear panel numbers Failure to do so may cause unnecessary delays in getting the unit repaired The AMT 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 ...

Страница 3: ... requires replacement breaking the seal on the case voidsyourwarranty TheDetective EX DX 100Tshould be opened only by ORTEC authorized service personnel If you have anyquestions about the use or maintenance of this instrument please contact your ORTEC representative or our Global Service Center first IMPORTANT The Detective EX DX 100T is designed to function with the Regional Settings in Microsoft...

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Страница 5: ...erface for Multiple Identifier Applications 8 2 THE DETECTIVE EX DX 100T 9 2 1 Unpacking and Setup 9 2 2 The Detective EX DX 100T 10 2 2 1 Front Panel 10 2 2 2 Rear Panel Connectors 12 2 2 3 The Touchscreen 12 2 2 4 Attaching the Carrying Strap 13 2 3 The Docking Station 14 2 3 1 Connectors and Indicators 14 2 3 2 Strapping the Detective EX to the Docking Station 15 2 4 The PAC II Charger 15 2 5 T...

Страница 6: ...t for Classify ID Display Mode 33 3 2 5 Intense View Highest Intensity Spectrum Lines 34 3 2 6 Display Spectrum 35 3 2 6 1 Display Controls 35 3 3 Search Mode 36 3 4 Monitor Mode 37 3 5 SNM Search Mode 38 4 IDENTIFICATION MESSAGES AND RADIONUCLIDE LIBRARY 41 4 1 Comments on Classify Mode Messages 45 4 1 1 Comments on Found Nuclide Screen Messages 46 5 ADVANCED SETUP 47 5 1 Advanced Setup Page 1 47...

Страница 7: ...s 63 5 2 6 SNM Mode Settings 63 5 2 7 Dose Rate Units and Alarms 64 5 2 8 Audio Settings 65 5 3 Advanced Setup Page 3 66 5 3 1 Remote 66 5 3 2 Exit 66 5 3 3 Spectra 66 5 3 3 1 Ask for Sample Description 66 5 3 3 2 Default Description 67 5 3 3 3 Data Location 67 5 3 3 4 File Save Format 67 5 3 3 5 Delete Stored Spectra 67 6 FILE TRANSFER TO COMPUTER 69 6 1 Windows 8 and 7 69 6 2 Windows XP 71 6 3 W...

Страница 8: ...ve EX 79 7 12 Other Problems with the Detective EX 79 8 USING THE DETECTIVE EX WITH ORTEC SPECTRUM ANALYSIS PROGRAMS 81 8 1 Connecting the Detective EX to a Computer 81 8 2 Quantitative Analysis of Detective EX Spectra in GammaVision and ISOTOPIC 82 8 3 Detective EX MCB Properties in MAESTRO 83 8 3 1 Amplifier 84 8 3 2 Amplifier 2 85 8 3 3 Amplifier PRO 85 8 3 4 ADC 86 8 3 5 High Voltage 86 8 3 6 ...

Страница 9: ...ty instruction is not observed In addition the following symbols may appear on the product DANGER Hazardous voltage ATTENTION Consult the manual in all cases where this symbol is marked in order to determine the nature of the potential hazards and any actions that must be taken to avoid them Protective earth ground terminal Please read all safety instructions carefully and make sure you understand...

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Страница 11: ...ding to the requirements of ANSI N42 34 and other standards The radionuclide library for this release of the Detective EX is detailed in Chapter 4 2 The Detective EX can make an accurate and fast determination without the need for expert human intervention Nuclide identifications are based on the gamma ray peaks in the spectrum and on other aspects of the total spectrum 1 1 Monitoring Modes The De...

Страница 12: ... user in an effort to locate and identify a radioactive source IDs persist until you tap to acknowledge them this ensures none go unnoticed Search Mode Search Mode makes it easy to find the areas of highest radionuclide activity that is places where Identification Mode should be used The display shows the total gamma ray count rate and total neutron count rate in each time period of the last 221 t...

Страница 13: ...m display can be disabled 1 2 Hardware Features The Detective EX s integrated Computer runs under Microsoft Windows Mobile with the Detective EX software as the only program running The operation of the soft ware is controlled by soft buttons in much the same way as any other Windows program A soft keyboard is automatically displayed when any alphanumeric input is needed The color touchscreen has ...

Страница 14: ...e the Detective EX Wireless Remote Operation note P N 932735 Before using the Detective EX it must be set up and cooled and the calibration should be checked according to the instructions in Chapter 2 8 The instrument is shipped fully calibrated and is likely to still be correctly calibrated but checking the calibration is considered good practice 1 3 How This Manual Is Organized This release of t...

Страница 15: ...rd fills to capacity the Detective will automatically begin storing spectra in its computer s My Documents folder The background chn file is stored on the computer in the Program Files DetectiveEX folder If it is moved or deleted you must perform a new background measurement before using the instrument for radionuclide identification If you store the spectrum files on SD cards they can be transfer...

Страница 16: ... can choose to store them in either the ORTEC SPC file format in ANSI N42 42 format which is compatible with the ANSI N42 42 2006 standard or both The SPC file contains three parameters in addition to the contents specified in the ORTEC Software File Structure Manual for DOS and Windows Systems Part No 753800 hereinafter called the File Structure Manual Total neutron counts for each acquisition ze...

Страница 17: ...es are saved for each search one for the gamma count and one for the neutron count type is either G for the gamma ray chart or N for the neutron chart When saving in ANSI N42 format only one file is generated type is B indicating that it contains both the gamma ray chart and for units so equipped the neutron chart 1 4 2 3 The Background File The background file is saved in the Computer s Program F...

Страница 18: ...ent our Launcher interface Fig 2 runs first making it easy to switch between ORTEC identifier programs and exit to Windows Mobile Simply tap the desired program 6 If you wish to specify one of the applications to auto start when the Detective EX is rebooted just mark the checkbox beside the desired application Figure 2 illustrates the Launcher screen for a Detec tive EX on which the trans SPEC pro...

Страница 19: ...ns 5 3 3 3 and 5 3 3 4 on page 67 Initial calibration check Section 2 11 and background measurement Section 2 12 Note also that where the spectrum should not be viewed by the operator the spectrum display can be disabled see Section 5 2 4 2 2 1 Unpacking and Setup When you receive the Detective EX DX 100T the shipping box contains the following 7 The Detective EX DX 100T portable identifier and US...

Страница 20: ...of the bezel To reboot the computer press the power button The computer will restart then automatically launch the unit s software application the cooler will stay on throughout SD Card Slot This is located on the front panel under the protective dust cover To release the cover press and rotate by a quarter turn the two captured bayonet mount screws The SD slot is keyed so the memory card can only...

Страница 21: ...e strongly recommend that the dust cover be fastened in place at all times to protect the card slots from moisture and particulates Figures 4 and 5 show the PAC II charger and the docking station respectively The hardware specifications are in Chapter 9 Place the Detective EX on the docking station or beside the PAC II ...

Страница 22: ...ort Headphone jack For dose and count rate warning sounds The headphone volume can be adjusted as described in Section 5 2 8 Each connector includes a dust cover NOTE We strongly recommend that the dust cover be fastened in place at all times to protect the card slots from moisture and particulates 2 2 3 The Touchscreen Figure 7 shows the user interface on the Detective EX s high resolution color ...

Страница 23: ...isplay panel the strap should be anchored to the left front and right rear corners or vice versa If you wish to change the factory orientation use a 5 32 in hex wrench to exchange positions of the strap hanger studs and the regular hex head screws Thread the strap hanger stud through the hanger bracket followed by the two spacers then insert the stud into the Detective EX and tighten until the han...

Страница 24: ...tation on a hard level surface The underside of the docking station should be kept clear so air can circulate to help dissipate the heat from the cooler For more information on proper placement and treatment of the docking station see the setup instructions in Section 2 8 1 and the cautions in Section 2 7 2 3 1 Connectors and Indicators In addition to the built in calibration source the docking st...

Страница 25: ... PAC II does not contain a calibration source nor is it designed to dissipate heat from the Detective EX Figure 4 on page 11 shows the front panel charging indicators and output cable and the rear panel ac and dc power supply connectors Place the PAC II on a hard level surface where air can adequately circulate around it For more information on proper placement and treatment of the docking station...

Страница 26: ...ng if completely discharged it will typically reach full charge in 3 4 hours If using the adapter cable that connects directly to the Detective EX unscrew the dust cap from the INPUT POWER connector on the rear panel slide the coupling ring on the male cable end connector fully open align the 5 keys on the male connector with the slots on the rear panel female connector press to fully seat the mal...

Страница 27: ...from external power so the external bat teries are not consumed charging the internal battery The internal battery is only recharged through the use of a special lithium ion battery charger unit built into the docking station and PAC II using connections in the multi pin power plug The charging base will simultaneously supply both external power and connect to the battery charger to recharge the i...

Страница 28: ...n heated pavement for extended periods The front panel memory card slots and rear panel connectors include dust caps keep the card slots and all unused connectors capped The docking station and PAC II contain a portion of the battery recharging system and should not be exposed to water When using the docking station be sure to keep the underside clear of obstructions so the fans can function prope...

Страница 29: ... dead time drops below 70 so the instrument can perform as specified See Fig 15 page 22 and its associated discussion When the most recent background reading is no longer valid the Background Invalid message is displayed on the Survey Mode screen The Identify and Monitor buttons become inactive and the system will not post radionuclide IDs until a new background is accepted see Section 2 12 Howeve...

Страница 30: ... and attach the charger base s output cable to the Detective EX INPUT POWER connector To attach the cable to the Detective EX unscrew the dust cap from the INPUT POWER connector on the Detective EX s rear panel slide the coupling ring on the male cable end connector fully open align the 5 keys on the male connector with the slots on the rear panel female connector press to fully seat the male conn...

Страница 31: ...mobile battery as the external power source note that detector cooling can significantly discharge the battery A warm Detective EX typically requires approximately 12 hours to cool to operating temperature When the detector reaches operating temperature the Detective EX bias voltage will automati cally turn on To see if the bias voltage status is On or Off tap on Advanced then Status Until the det...

Страница 32: ...en the detector dead busy time 70 a red warning message is displayed in the upper right corner of the screen Fig 15 and persists until you move away from the hot source Instrument Status Area The center of the Survey Mode screen provides brief indi cator s of the unit s readiness for data acquisition The Status is either READY Fig 23 or Detector is warm In addition warnings such as the high gamma ...

Страница 33: ...ormats This is discussed in Sections 5 3 3 3 and 5 3 3 4 page 67 2 11 Checking the Calibration Once the Detective EX is Ready the next setup step is to check the calibration This procedure checks and adjusts the Detective EX s electronics so that it correctly identifies the nuclides in the area For an application as important as interdiction of illicit nuclear materials trafficking it is important...

Страница 34: ...the indicated source in this case 60 Co in front of the detector window then tap the Start Calibration Now Fig 18 button While calibration is in progress Fig 19 the unit will show the Time remaining This interval will depend on the strength of your calibration source At the end of the calibration period the Use Improved Calibration button will be displayed along with the calibration and peak shape...

Страница 35: ...ction 2 12 below NOTE A new background measurement is required after calibration If you tap Back without accepting the new back ground only the gamma and neutron count rate meters will function Identify and Monitor Modes will be disabled until another you run and accept a new background For more information on calibration see Sections 5 2 1 and 5 1 3 2 12 Running A New Background After Calibration...

Страница 36: ...tings screen also allows minimum intervals of 1 5 or 15 minutes All sources should be removed from the area before you tap the Run a Background but ton at the end of the manual calibration routine If you leave the source in place a high count rate message will remind you to remove the source and restart the calibration Tapping the Run a Background button opens the screen shown in Fig 22 and automa...

Страница 37: ...and third pages of the Advanced Setup menu see Section 5 2 4 1 for instructions NOTE Passwords are case sensitive and can include space characters Note that there is no master password so be sure to record it If you lose the password you must contact your ORTEC representative or our Global Service Center for assistance The Detective EX is now ready to use ...

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Страница 39: ...nsitivity and adjusting the scroll rate for the Search Mode strip chart emulation IMPORTANT You can set a password to limit access to the second and third pages of the Advanced menu see Section 5 2 4 1 for instructions Chapter 6 provides instructions on downloading spectrum files to a computer Chapter 8 gives detailed information on connecting the Detective EX to a computer and using it as a high ...

Страница 40: ...e Dose Alarm setup feature under the Advanced Settings screen Section 5 2 7 Tap Identify to start the Identification Mode Section 3 2 Tap Monitor to start the Monitor Mode Section 3 4 Tap Search to start the Search Mode Section 3 3 Tap SNM to use the SNM Mode Section 3 5 Tap Advanced to display the Advanced Setup dialog Chapter 5 NOTE If a blue simulated LED is displayed in the upper left beside t...

Страница 41: ...al Industrial Nuclear Plutonium Other Chapter 4 lists all nuclide IDs along with ANSI their threat suspect innocent status and Classify category Figures 25 and 26 compare the same four IDs as displayed in the ANSI and Classify modes respectively In each figure the Detective EX has found one industrial nuclide unshielded 241 Am innocent and two uranium isotopes 235 U and 238 U threats In addition t...

Страница 42: ...arch Mode these data will be lost 3 2 1 Start the Identification To start an identification tap the Identify button on any screen that displays it NOTE When you start an identification or switch to Search Mode the contents of the live spectrum memory are erased before the new data are collected If you wish to save the data from the most recent identification or search session you must do so before...

Страница 43: ...tap Back to return to the Survey Mode screen The spectrum is retained in memory until you start the next identification or search acquisition If you have not already viewed and or saved the spectrum you can do so from the Survey Mode screen 3 2 3 Save Tap Save to write the current identification spectrum and results in the selected data storage location and file formats Sections 5 3 3 3 and 5 3 3 ...

Страница 44: ... Intense to view the list of most intense gamma ray lines in the spectrum The most intense lines list is a continuously updating list of the 10 best peaks currently detected Fig 29 The energies are based on the internal nuclide library The rank is based on the confidence value for the peak When a detected energy matches an entry in the library its tentative identity is posted on this screen by pea...

Страница 45: ...greater than or equal to 10 000 The number of trailing zeros in the number is replaced by E followed by the number of zeros Some examples 10 000 becomes 1E4 12 000 becomes 12E3 The spectrum display has a vertical marker line Just below the spectrum is shown the position of the marker in the spectrum in keV and the counts in the marker channel To move the marker line to a different location tap the...

Страница 46: ... will change to Continue in the pause mode Tap Continue to resume the data collection 3 3 Search Mode The Search Mode screen is a strip chart emulation that displays total count rate gamma and neutron vs time see Fig 31 The gamma ray data are presented in blue and the neutron data are shown in red Because the spectrum display area is limited a modified version of scientific notation is used when l...

Страница 47: ...at spans the paused time To go directly to the Identification Mode tap Identify If you have not already saved the current Search data they will be lost when you change modes To end this search and return to the Survey Mode Fig 23 tap Back The current search data will be retained until the next identification or search You can display the most recently acquired search or identification spectrum fro...

Страница 48: ...of operations If the 133 Ba search is disabled its bar graph is not displayed on the SNM search screen SNM searches cannot be saved to collect data that can be saved and reviewed later tap Identify Figures 34 through 37 depict a search in which 133 Ba is detected At the start of the search the status message says Continue to search Fig 34 This message is displayed until the detection threshold for...

Страница 49: ...ATION MONITORING 39 Figure 34 SNM Search Under Way Figure 35 133 Ba Threshold Almost Exceeded Figure 36 133 Ba Tentatively Detected Figure 37 High Confidence That 133 Ba Has Been Detected Use Identification Mode to Verify ...

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Страница 51: ...nshielded Innocent Industrial Ar 41 Innocent Industrial As 72 Innocent Industrial As 74 Innocent Medical At 211 Innocent Other Au 198 Innocent Industrial Ba 133 Innocent Industrial Ba 140 Innocent Industrial Be 7 Innocent Industrial Beta emitter Innocent Bremsstrahlung Bi 207 Innocent Other Bi 212 Th 232 U 232 daughter Innocent Industrial Bi 214 Ra 226 daughter Innocent NORM Br 76 Innocent Other B...

Страница 52: ...al Enriched Uranium Threat Uranium Eu 152 Innocent Other Eu 154 Innocent Other Eu 155 Innocent Other Eu 156 Innocent Other Fe 59 Innocent Other Ga 64 Innocent Other Ga 64 shielded Innocent Other Ga 67 Innocent Medical Ga 67 shielded Innocent Medical Gd 153 Innocent Other Gd 159 Innocent Other Ge 68 Ga 68 Innocent Medical HEU Threat Uranium Hf 181 Innocent Industrial Hg 203 Innocent Industrial Ho 1...

Страница 53: ...ial La 138 Innocent NORM La 140 Innocent Other Lu 172 Innocent Medical Lu 176 Innocent NORM Lu 177 Innocent Medical Lu 177m Innocent Medical Mn 52 Innocent Industrial Mn 54 Innocent Other Mn 56 Innocent Industrial Mo 99 Innocent Medical Na 22 Innocent Other Na 24 Innocent Medical Nb 92m Innocent Industrial Nb 94 Innocent Industrial Nb 95 Innocent Industrial Nb 96 Innocent Industrial Nb 96 shielded...

Страница 54: ...ial Sb 124 Innocent Industrial Sb 124 shielded Innocent Industrial Sb 125 Innocent Industrial Sb 127 Innocent Industrial Sc 46 Innocent Medical Se 75 Innocent Medical Sm 153 Innocent Medical Sm 153 shielded Innocent Medical Sn 113 Innocent Other Sr 82 Rb 82 Innocent Medical Sr 85 Kr 85 Innocent Industrial Sr 89 Innocent Medical Ta 182 Innocent Other Tc 96 Innocent Industrial Tc 99m Innocent Medica...

Страница 55: ... Messages The following explains the criteria for selected Classify ID Display Mode messages HEU highly enriched uranium This message is displayed if the major lines of uranium are detected and the ratios of the intensities of the lines indicates the 235 U content to be above about 70 Am241 unshielded in the Industrial category This message is displayed if the 59 keV peak is located It could mean ...

Страница 56: ...urce and count longer to determine the nature of the suspect item 4 1 1 Comments on Found Nuclide Screen Messages RDD Detected This message is posted when calculated activity is 100 mCi whether the activity is from threat or innocent nuclides The gamma count rate and dose rate meters on the Survey Mode and ID Mode screens display a flashing red background and extremely high count and dose rates ...

Страница 57: ...he hardware status perform calibrations and background measurements turn the cooler on off etc as described in the following section 5 1 Advanced Setup Page 1 5 1 1 Status The Status dialog Fig 39 allows you to monitor the hardware diagnostic and data acquisition parameters The default view is a simplified heads up OK ERR readout However you can toggle between the simplified view and the actual re...

Страница 58: ...V has automatically turned on Detector Temp Cold Tip Temp and Bias Voltage read Error Once cooldown is com plete and the HV automatically turns on these indicators change to OK When the cooler is switched off the Cold Tip Temp and Cooler Drive indicators read OFF The OK indicator means the parameter is within the allowed limits The Error indicator means the parameter is outside the limits and must...

Страница 59: ...ignificantly warming the detector As soon as the cooler is restarted the Detective EX typically shows a Ready status within a few seconds The cooler can be restarted at any time without harming the detector crystal regardless of whether the detector is warm partially cooled or cooled to the operating temperature range 5 1 3 Calibrate Manual This command starts the manual calibration routine which ...

Страница 60: ...ill display the full width at half maximum FWHM an indicator of peak shape and the calibration adjustment Cal Adjust The calibration adjustment is the difference between the spectrum position of the calibration source s peak in the new calibration and the position of the same peak in the current calibration expressed in energy as a percentage of the actual peak energy 5 1 3 2 Apply the Improved Ca...

Страница 61: ...valid message is displayed on the Survey Mode screen The Identify and Monitor buttons become inac tive and the system will not post radionuclide IDs However the gamma and neutron count rate meters on the Survey Search and SNM Mode screens continue to function normally Tap Back to return to the Advanced Setup dialog 5 1 3 4 Restore Default If you have changed the calibration now or at any time in t...

Страница 62: ...n Fig 46 and automatically starts the background acquisition Acquisition continues until you tap either Save or Cancel which will return you to the Advanced menu If the measurement is canceled before the minimum time has elapsed the software does not accept i e save and use the new background spectrum Instead it reverts to the existing back ground file 13 5 1 5 List Nuclides View Analysis Library ...

Страница 63: ...cation Mode spectrum files include both the spectrum and information on the radio nuclides found during the identification session When you display a stored spectrum you can view this information by tapping the ID button below the spectrum display This will open the ID Report screen Fig 50 Tap the listbox at the top of the screen to access the list of Found Nuclides Fig 51 Suspect Nuclides for LCX...

Страница 64: ... Detective EX DX 100T Portable HPGe Spectrometer User s Manual 931040P 1014 54 Figure 48 Spectrum Directory Figure 49 View Spectrum Tap ID to View Reports Figure 50 ID Report Figure 51 Found Nuclides Report ...

Страница 65: ...931040P 1014 5 ADVANCED SETUP 55 Figure 52 Suspect Nuclide Report for LCX Mode spectra only Figure 53 Top Spectral Lines Figure 54 GPS Report ...

Страница 66: ...set the screen shown in Fig 56 will be displayed Tap in the password text box to open the soft keyboard Enter the password and tap OK If you entered the correct password which is case sensitive and treats spaces as characters the second Advanced Setup page will be displayed Fig 57 For more information on the Password screen see Section 5 2 4 1 If the password was incorrect the Password invalid mes...

Страница 67: ...d adjusts the Detective EX s electronics so that it correctly identifies the nuclides in the area This function searches for the calibration source peak in a window 30 keV wide centered on the peak channel for the selected source Once the peak is located and its net area reaches 4000 counts the detector amplifier s fine gain setting is adjusted for optimum performance Unlike manual calibration aut...

Страница 68: ...auto calibration interval by tapping the Schedule lists and selecting the desired time of day as well as one of the following intervals Daily Weekly choose the Day of the week Monthly tap in the Day of the month field and use the soft keyboard to enter the day 5 2 1 1 Setup Requirements for Successful Auto Calibration For Auto Calibration to run successfully The Auto Calibration checkbox must be m...

Страница 69: ...he quality test If you disconnect the instrument from the external power source during auto calibration the routine will attempt to run to completion Tap on the Abort button to interrupt auto calibration then Back to return to Survey Mode When the unit is reconnected to external power auto calibration will start at the next scheduled interval 5 2 2 Background Settings Use this screen to pre config...

Страница 70: ... time for Identification Mode tap in the field to open the soft key board enter a count time from 1 second to 9999999 seconds and tap Set In preset mode the Pause Continue button allows you to extend the count For more informa tion and an example see Section 3 2 2 5 2 3 2 ID Display Mode Choose whether to display identifications by radio isotope name ANSI or by category Classify for instance Indus...

Страница 71: ...CX mode are displayed in the Classify and ANSI ID Display Modes both screens reflect the same set of found and suspect substances Note that in LCX mode the Color coded IDs option is always on 5 2 3 4 Color Coded IDs When this option is checkmarked on ANSI Mode nuclide IDs are displayed on a color coded background indicating their threat suspect innocent status refer to Figs 25 33 and 66 As noted i...

Страница 72: ... Center for assistance 5 2 4 2 Allow Display of Spectrum This allows an administrator to hide the Display Mode by locking the spectrum display When the display is locked none of the Display buttons will be shown on the dialogs To lock the display tap the checkbox to mark it To restore access to the spectrum display tap the checkbox again to unmark it To prevent spectra from being viewed on the Det...

Страница 73: ...ers can also choose to enable and configure a detection threshold for the plutonium surrogate Ba 133 for training and site setup purposes see the discussion in Section 3 5 If the Ba 133 search is enabled four bar graphs will appear on the SNM Search Mode screen instead of just three see Fig 34 on page 39 The Dwell Time setting is the same for all SNM radioisotopes To set the Q Alarm Threshold for ...

Страница 74: ...ve these limits the ID Mode s Found Nuclide screen reports the message RDD Detected The Dose Alarms dialog Fig 72 lets you optionally set lower thresholds for one or both types of radiation To set either Threshold tap in the field to display the soft keyboard Enter the desired value and tap Set You can choose display the gamma dose rate in microSieverts per hour μSv hr or millirem per hour mrem hr...

Страница 75: ...d through headphones the speaker in the Detective EX case or both The neutron sensitivity is lower than the gamma sensitivity because the neutron count rate is lower To adjust the clicker volume tap Audio Fig 73 then set the Headphone Volume or the Speaker Volume The two Sensitivity sliders let you choose the num ber of counts per click the default is 1000 counts per click To change clicker sensit...

Страница 76: ...3 3 Spectra The Spectra command opens the screen shown in Fig 74 which lets you choose sample description options the file storage location and the file save formats In addition you can delete spectrum files The top right of the screen shows the number of spectra that can be stored i e the remaining storage capacity in the current storage location refer to Fig 14 Filenaming conventions are given i...

Страница 77: ...resent in its slot it will not be on the list Tap the location you want Keep in mind that if the storage card fills up the Detective will automatically begin saving spectra in its computer s My Documents folder 5 3 3 4 File Save Format The DetectiveEX application generates two basic types of files Identification Mode gamma ray spectra Search Mode strip chart histograms of gamma and optional neutro...

Страница 78: ...e EX DX 100T Portable HPGe Spectrometer User s Manual 931040P 1014 68 Figure 75 Select the Data Location Figure 76 Select the Data Format s Figure 77 Delete Spectrum Files IMPORTANT There is no undo for this deletion ...

Страница 79: ...ows 8 and 7 1 Download and install the free Windows Mobile Device Center from the Microsoft Download Center Follow the wizard prompts restart the computer then start the Windows Mobile Device Center program 2 Connect the Detective EX s DATA port to the computer If this is the first time the Detec tive EX has been connected to this computer Windows 8 and 7 will indicate that the hard ware driver ha...

Страница 80: ...Stored search and identification files will be located in the SD card s Data folder or in the My Documents folder depending on the location set on the Spectra dialog see Section 6 If your files are stored on the SD card select the Storage Card and open the Data folder If your files are in the My Documents folder select the Documents item on the left sidebar Identification Mode spectra in the SPC f...

Страница 81: ...n connected to this computer Windows XP will display a series of Found New Hard ware messages indicating a mobile device e g the Detective EX computer has been detected The Synchronization Setup Wizard will start Follow the wizard prompts for a standard partnership according to step 3 3 On the Synchronization Options screen unmark ALL checkboxes scrolling down as needed to ensure all items have be...

Страница 82: ...ective EX see the troubleshooting steps in Section 7 10 5 You can now click the Explore toolbar button in the ActiveSync dialog to open Windows Explorer and view the new connection and its menu tree From the host computer the Detective EX is displayed as My Windows Mobile Based Device in the Mobile Device folder under My Computer Fig 83 Stored search and identification files will be located in the...

Страница 83: ...3 Figure 83 Exploring the Detective EX Computer s Files from the ActiveSync Window 6 3 When File Transfer Is Complete To return the Detective EX to standalone service simply disconnect it from the USB cable and navigate back to the home screen ...

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Страница 85: ...el Press and hold the power button for several seconds until the computer shuts down and restarts the mechanical cooler will continue running This will reset the operating system and automatically relaunch the DetectiveEX application 7 3 If You Drop the Detective EX The Detective EX has been designed to be a rugged instrument and should survive reasonable levels of mechanical abuse It has been dro...

Страница 86: ...rce to start the cooler and the internal batteries cannot cool a warm detector If the 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 10 If the cooler does not automatically restart go to the Advanced Setup menu and tap Turn Cooler On If the problem persists contact your ORTEC representa...

Страница 87: ...e calibration routine does not complete continues running beyond one minute tap STOP to abort it correct the situation and restart the calibration 7 8 2 The Centroid FWHM or Calibration Adjustment Value Has Changed Dramatically Since the Last Calibration This is a highly unlikely occurrence The instrument is an advanced digital design and highly stable when operating correctly If the energy calibr...

Страница 88: ...tective EX to the computer for the first time the new hardware bubbles in the lower right corner of the screen will indicate that device driver installation failed Confirm the USB cable is good If connecting via a USB hub ensure that it is correctly connected and functioning Finally make sure you are connecting to the computer via the DATA port If this does not resolve the issue go to the next ste...

Страница 89: ...uter via the CONTROL port Check to see if the Detective EX display is locked Make sure the USB cable is properly connected to the computer Make sure USB hubs are correctly connected and functioning Check the Master Instrument List on the computer to ensure that the Detective EX is on the list If it is not listed manually run the MCB Configuration program from the Win dows Start menu See the MAESTR...

Страница 90: ...egion tab select English United States from the listbox On the Number tab choose the period for the Decimal symbol and the comma for the Digit grouping symbol On the Time tab select h mm ss tt as the Time style and the full colon as the Time separator On the Date tab use M d yy as the Short date the forward slash as the Date separator and the Long date format dddd MMMM dd yyyy Tap the upper right ...

Страница 91: ...NTROL port Within a few seconds the Detective EX screen will change to the display shown in Fig 84 and all touchscreen features will be disabled The unit can then be used as a high performance MCB in MAESTRO etc The first time this Detective EX is connected to a particular for use as an MCB follow the installation instructions in Chapter 6 for the host computer s operating system IMPORTANT When bo...

Страница 92: ...isition and clearing the detector memory This locking command functions separately from the Detec tive EX password If the Detective EX is password locked within MAESTRO you can still use it in the field without knowing the password however you cannot recon nect it to a computer and erase its memory In addition the next time you use it in MCA Mode with MAESTRO it will still be locked Also note that...

Страница 93: ...le with or without further analysis NOTE If the CLB file is specified in the GammaVision SDF file or ISOTOPIC configuration the An1 file generated during analysis will contain the proper calibration information but the original SPC file without the efficiency information will not change To load the efficiency information before acquiring a new spectrum with the Detective EX attached to a computer ...

Страница 94: ...ter was last entered During the time the entry is underlined no other program or computer on the network can modify this value The changes you make on most property tabs take place immediately There is no cancel or undo for the dialog NOTE In MAESTRO 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 thi...

Страница 95: ...he fixed Rise Time and Flattop Width settings You can also use the InSight Virtual Oscillo scope mode to view the digital signal processor s actual sampled waveform on a reference graticule however the shaping settings cannot be adjusted 8 3 3 Amplifier PRO This tab Fig 87 displays the control for the Low Frequency Rejector LFR 15 feature a digital filter that corrects the pulse output signal for ...

Страница 96: ...ive EX High Voltage Tab 8 3 4 ADC This tab Fig 88 allows you to monitor the current Real Time Live Time and Count Rate In addition you can view the fixed Conversion Gain and the Lower and Upper Level Discriminator settings 8 3 5 High Voltage Figure 89 shows the High Voltage tab which allows you to monitor the Actual bias You cannot adjust the bias voltage or turn it on and off these functions are ...

Страница 97: ...Section 5 1 6 8 3 7 About This tab Fig 91 displays hardware and firmware information about the Detective EX as well as the data Acquisition Start Time Sample description is not used In addition the Access field shows whether the MCB is currently locked with a pass word by MAESTRO Read Write indicates that the MCB is unlocked and Read Only means it is locked See the note concerning passwords on pag...

Страница 98: ...dis played simultaneously on the Status tab You can change the selected para meters at any time The monitored parameters are Detector State of Health reported as OK or ERR Gamma Dose Rate reported in µSv h and indicating whether this reading was made with the detector Ge for low dose rates or the Geiger Müller tube GM for high dose rates See Gamma Dose Rate Determination page 92 for further discus...

Страница 99: ...ndition met during the acquisition causes the MCB 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...

Страница 100: ...ops counting when any ROI channel reaches this value unless there are no ROIs marked in the MCB in which case that MCB continues counting until the count is manually stopped Enter the ROI Integral preset value in counts With this preset condition the MCB stops count ing when the sum of all counts in all channels for this MCB marked with an ROI reaches this value This has no function if no ROIs are...

Страница 101: ...verload 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 Stored Spectrum Memory An unlimited number of spectra can be stored on removable SecureDigital or CompactFlash memory cards The number of spectra stored on an individual card depends on the capacity of the card Low Frequ...

Страница 102: ...e Ge detector spectrum For dose rates above this value the internal compensated GM tube is used The Detective EX switches between the two automatically For radiation fields from extended sources e g from a container full of NORM or far field point sources 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 d...

Страница 103: ... to implement this option See the ORTEC technical note Wireless Remote Operation With SOTI s Pocket Controller Software P N 932735 Presets Multiple presets can be set within MAESTRO for any or all of the following Real Time Stops data collection when the real time reaches this value in increments of 1 s Live Time Stops data collection when the live time reaches this value in increments of 1 s ROI ...

Страница 104: ...tive EX has been subjected and a shock in excess of 20 g will void the warranty Ambient Operating Environment 0 to 40 C at a relative humidity 90 at 35 C non condensing Input Power 10 V to 17 V dc 30 W or from auto sensing ac powered battery charger External Power DC input and battery charge input MS3112E12 10 S or Bendix PT02E 12 10S connector Internal Battery Rechargeable nominal 14 4 V lithium ...

Страница 105: ...nsing ac powered battery charger Headphones Rear panel female connector with dust cover accepts standard male head phone jack Headphone volume controllable from the Detective EX button pad Note that the audible high dose rate alarm sounds whether or not headphones are connected to the Detective EX This alarm is not routed through the headphones and its volume is independent of the head phone volum...

Страница 106: ...addition to completely independent standalone operation the Detective EX can also be oper ated as a benchtop MCB in conjunction with ORTEC spectroscopy applications such as MAESTRO by connecting it to any computer running Windows 8 7 or XP Professional SP3 9 6 Shipping the Detective EX To avoid damaging the cooler and where applicable to comply with transportation regulations be certain to turn th...

Страница 107: ...um 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 reasonably 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 occasional...

Страница 108: ...ORTEC Detective EX DX 100T Portable HPGe Spectrometer User s Manual 931040P 1014 98 Intentionally blank ...

Страница 109: ...en connected to external power such as the docking station the new battery will typically reach full charge within 2 4 hours For more information contact your ORTEC representative or our Global Service Center To change the battery 1 Turn off the cooler and the Detective EX electronics by reversing the instructions in Section 2 8 2 2 Figure 96 shows the battery hatch on the side panel Remove the fi...

Страница 110: ...ould feed from the front of the battery compart ment across the top edge of the battery pack the edge closest to the top of the instrument then toward the back of the compartment Close the tie around the new battery 4 Reverse Steps 2 and 3 to replace the hatch 5 Connect the Detective EX to external power Remember that the cooler cannot be restarted from the internal battery 6 Restart the Detective...

Страница 111: ...acturer and in accordance with the instructions provided All radioactive materials should be securely stored when not in use This product may be disposed of in regular waste without regard to the radioactive content pro viding the customer is not a specific licensee and all radiation symbols have been removed or defaced If the customer receiving the exempt quantity is a specific licensee then the ...

Страница 112: ...ORTEC Detective EX DX 100T Portable HPGe Spectrometer User s Manual 931040P 1014 102 Intentionally blank ...

Страница 113: ...arger 15 Clicker audio settings 65 Connecting to a PC 81 using MAESTRO 83 Connections auto battery adapter cables 16 Detective EX 12 docking station 14 power adapter charger 15 setup and power up 20 Cooler cautions 18 detector warmup 96 power sources 16 power up 21 restarting 21 shipping 96 shipping preparations 19 shock tolerance 18 shutdown for brief periods 49 shutdown for long periods storage ...

Страница 114: ...ter charger cautions 18 features 15 features illustrated 11 indicators 15 placement 15 setup 15 Quantitative analysis 82 RDD Detected message 46 Reference point 93 Remote screen 66 Reports found nuclides 33 54 GPS location data 55 ID report 54 suspect nuclides 33 55 top lines most intense 34 55 viewing in MAESTRO 87 viewing stored spectra and reports 52 53 Restricting access to settings 27 61 Sear...

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