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Ludlum Measurements 702i, Manual

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Model 702i and 711i  

Technical Manual

 

Section 1 

 

 Ludlum Measurements, Inc.

 

 

December 2018 

1-2 

The Model 702i or 711i unit can be connected to a remote computer using an Ethernet cable, and 
accessed  with  either  Quantum™  MCA  (standard)  or  Quantum™  Gold  (quantitative  analysis) 

software.  The Quantum™ software allows: 

Up to eight MCAs to be controlled at one time, with full spectrum data in real time. 

Model 702i or 711i unit analysis in 256 QCC or linear, 512 QCC or linear, and 1024 linear 

modes. 

Note that if you are using either the Model 702i or 711i unit without a PC, operation is limited to 
256  and  512  QCC,  including  the  saving  of  spectra.  However,  while  under  control  of  Quantum 

software, all ADC modes (including 1024 linear) are available. 
 

The basic Model 702i  or 711i unit consists of: 

The spectrometer electronics 

Internal gamma ray detector  

An AC power adapter 

 

Optional devices include:

Quantum software 

A car power adapter 

 

Summary of Contents for 702i

Page 1: ...LUDLUM MODELS 702i and 711i ISOTOPE IDENTIFIERS December 2018 Serial Number ID001000 and Succeeding Serial Numbers ...

Page 2: ...LUDLUM MODELS 702i and 711i ISOTOPE IDENTIFIERS December 2018 Serial Number ID001000 and Succeeding Serial Numbers ...

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Page 4: ...Model 702i Isotope Identifier ...

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Page 10: ...anty of merchantability or fitness which extend beyond the description of the face there of If the product does not perform as warranted herein purchaser s sole remedy shall be repair or replacement at the option of Ludlum Measurements In no event will Ludlum Measurements be liable for damages lost revenue lost wages or any other incidental or consequential damages arising from the purchase use or...

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Page 12: ...a Car Adaptor 3 1 CompactFlash Card 3 1 Batteries 3 2 Ethernet Connection for Data Output 3 3 Specifications 4 Safety Considerations 5 Cleaning Instructions and Precautions 5 1 Warning Markings and Symbols 5 1 Recycling 6 General Operation 7 Turning the Unit On and Off 7 1 Search Modes 7 1 Audible Search Setting 7 5 Taking a Background 7 5 Identifying Sources of Radiation 7 7 Analysis Report 7 8 S...

Page 13: ...n On or Off 9 2 Adjust Slider 9 2 Select Among Options 9 3 Isotope List 9 3 Edit Numeric Value 9 4 Edit Date for Filter 9 5 User Menus 9 5 Field Settings 9 5 Spectral Data 9 8 Configuration 9 10 Help Menu 9 11 Administrator Menus 9 12 Configuration Extra Items 9 12 Admin 9 13 Factory Settings 9 17 ...

Page 14: ...perform additional maintenance functions This manual will cover aspects of both but places an emphasis on User functions CAUTION It is important to limit access to Administration Mode to those who are qualified to use it This mode includes the advanced functions of the instrument and allows the user access to everything The general user should be limited to User Mode only If any of the advanced fu...

Page 15: ...ull spectrum data in real time Model 702i or 711i unit analysis in 256 QCC or linear 512 QCC or linear and 1024 linear modes Note that if you are using either the Model 702i or 711i unit without a PC operation is limited to 256 and 512 QCC including the saving of spectra However while under control of Quantum software all ADC modes including 1024 linear are available The basic Model 702i or 711i u...

Page 16: ...or too close red The Finder mode allows location of the source by displaying intensity vertically and time horizontally The midscale ID shows the proper intensity for identification In addition an audio signal can aid in finding the source The other two search modes Bars and Spectrum are more advanced and must be enabled in the administrator menu These two screens allow the user to view isotopes i...

Page 17: ...menu or report This key is also used to turn system power on and off MENU Enters the menu system from any search screen ENTER Used to select currently highlighted option such as a soft key or a menu item and also used to continue to next step of multi step processes and These keys will be referred to throughout the text as LEFT and RIGHT They are used to select among the soft key options or menu t...

Page 18: ...entification mode to collect report and store an analysis of a possible radioactive substance Figure 2 Example of Soft Keys Display Conventions In order to make the Model 702i or 711i more friendly and easy to use we have defined several color and layout conventions for the user interface Four different nuclide classes are defined by their colors which appear as labels and as filled in areas in sp...

Page 19: ...s you may be able to use LEFT and RIGHT to change the value Two examples are shown here Different colors are used to group the items in each of the main menus All sub menus the menus that come up within an operation selected from the menu system are displayed in shades of gray and white The shading serves to remind you that if you exit from this menu with the BACK key it will only take you back to...

Page 20: ...m all the tasks needed in the line of duty The Administrator functions allow a health physicist or other expert to set up the device for specific applications and to perform additional maintenance functions 1 The User mode can generally be accessed without a password while the Administrator mode requires a password to be entered Figure 4 Log in Screen with User Selected Figure 5 Log in Screen for ...

Page 21: ...e The Quantum software is a useful tool for advanced users seeking additional analytical capabilities for their Model 702i and 711i spectra The Quantum software is supplied in two basic configurations Quantum MCA and Quantum Gold Quantum MCA a subset of Quantum Gold is the standard software and provides qualitative but not quantitative analysis Qualitative analysis will allow analyzing for the typ...

Page 22: ...lied for your unit This power supply will run the unit and charge the internal batteries and connects directly to the watertight connector The other model requires an adapter cable which plugs into the watertight connector Then the AC power supply plugs into a mating plug on the adapter cable The car adapter plugs into a 12 volt accessory outlet or cigarette lighter outlet in your vehicle It then ...

Page 23: ...have a media reader built in a simple USB flash card reader can be easily purchased from a commercial supplier In either case the device will be assigned a drive letter often E or F we will assume E throughout this document The spectra may then be read from the directory E spectra Batteries Your Model 702i and 711i unit comes equipped with eight internal rechargeable AA batteries These batteries a...

Page 24: ...strator Press the MENU button key to go to the menu and move right to select the Admin menu If this is your first time using Ethernet communications from this unit or you have moved the unit to a new network you may need to enter information into the Network Setup Otherwise you will only need the IP address setting of the Model 702i or 711i unit for use in step 8 below Move down to select the firs...

Page 25: ...igitally adjustable Spectrum Conversion Collection Mode Linear 16384 Channels Conversion Modes Linear 256 512 1024 Channels QCC 256 512 Channels U S Patent 5 608 222 Note If you are using the instrument without a PC operation is limited to 256 and 512 QCC including the saving of spectra However while under control of Quantum software all ADC modes including 1024 linear are available System Control...

Page 26: ...3 8 cm 2 x 1 5 in NaI 711i Crystal 3 8 x 3 8 cm 1 5 x 1 5 in LaBr Detector Sensitivity 702i 775 cpm µR hr 137 Cs 711i 650 cpm µR hr 137 Cs Energy Resolution 702i 7 8 137 Cs 711i 3 5 5 137 Cs Energy Range 18 keV to 3 MeV Bias Integral HV supply from 0 1200 V Actual operating voltage calibrated to each detector Connection Switchcraft 6 pin weathertight connector Dimensions 25 1 x 11 4 x 22 1 cm 9 9 ...

Page 27: ...ng only water as the wetting agent Do not immerse the instrument in any liquid Observe the following precautions when cleaning 1 Turn the instrument OFF 2 Allow the instrument to sit for one minute before cleaning Warning Markings and Symbols Caution The operator or responsible body is cautioned that the protection provided by the equipment may be impaired if the equipment is used in a manner not ...

Page 28: ...sing a tool 1 Turn the instrument power OFF 2 Allow the instrument to sit for one minute before accessing internal components The crossed out wheelie bin symbol notifies the consumer that the product is not to be mixed with unsorted municipal waste when discarding Each material must be separated See section 6 Recycling for further information The CE mark is used to identify this instrument as bein...

Page 29: ...er but simply desires to inform its consumers of the range of recyclable materials present in its products so that the user will have flexibility in following all local and federal laws The following types of recyclable materials are present in Ludlum Measurements Inc electronics products and should be recycled separately The list is not all inclusive nor does it suggest that all materials are pre...

Page 30: ...h card allowing you to restart the instrument without losing calibrations or other information The real time clock has a separate internal lithium battery that keeps it running even when there is no other power source To turn the instrument off press and hold the BACK key After one second a message will appear and count down three seconds before the system turns off In the rare event of a system l...

Page 31: ...On initial power on this box will fill in with orange until enough data has been collected to ensure that the system is calibrated Then the box will turn green with a small pointer indicating the rate of calibration drift In the top center the screen displays the clock time It is important to have this time set correctly including your time zone so that the stored spectra will have the correct tim...

Page 32: ... area there is little radioactivity present Most of the counts are coming from either cosmic rays or naturally occurring sources such as 40 K Once the pointer moves up into the green area there is an indication of some unusual activity Within the green area an Identify operation should be started Finally if the pointer moves into the red area the activity is too high for a correct identification I...

Page 33: ...owed in on the source you should do an Identify operation The low area shown on the screen corresponds to the gray area on the Dial The ID area matches the green portion and the high area matches the red portion Identify will be most effective when the top of the rolling chart is falling within the ID area Figure 9 Bars Search Mode Screen The Bars screen provides a very different sort of informati...

Page 34: ...e you need a more inconspicuous way to monitor for radiation In addition the human ear is surprisingly sensitive to changes in rate so you may find that you can better tell whether you are seeing abnormal radioactivity by enabling the audible output The Audible Count Rate setting in the Field Settings menu turns on a click that increases in frequency along with the input count rate This sound cont...

Page 35: ...re time you can Wait or even Cancel if necessary If the countdown completes the system will continue for you Figure 11 Collecting Background Instructions to Remove Sources Once you continue you will see a display like that shown in Figure 12 Initially the graph will be fuzzy lack of statistics but it should smooth out as time goes on If you wish to collect a longer background you can increase beyo...

Page 36: ...ation and detector size Only with experience can the user determine what normal cpm readings are The most likely causes for high background readings are The presence of radioactive materials near the system in the form of samples or standards High concentrations of natural radioactive material such as 40 K in the building materials Less likely causes include High radon levels Identifying Sources o...

Page 37: ...signal or peak present in the spectrum If you wish to eliminate these uncertainties you can extend the collection time by using the 30 s soft key until the uncertainty has been resolved but this is rarely necessary When there is a definite peak present but it does not match any nuclide on the current trigger list it will be labeled in red for unknown UNK In this event it may be valuable to re anal...

Page 38: ...de specific dose rate in the same units as above and the confidence in this particular identification The final lines in the report detail the hardware settings used in the data collection process Storing Reviewing and Retrieving Spectra Spectra are automatically saved whenever an Identify process is completed Spectra are also saved for each background taken and for certain other operations like f...

Page 39: ...s from the trunk of your car to the inside of a building This is particularly important if the unit was turned off at one temperature e g indoors and turned on again at another e g right after spending a long time in your car Coarse Calibration The recalibration procedure described in this section automatically adjusts hardware parameters for example high voltage and amplifier gain to obtain an ac...

Page 40: ...igure 16 Coarse Calibrate Source Placement Dialog Once you Continue or allow the countdown to complete you will see a screen that looks similar to the one shown in Figure 17 This process may repeat several times as the system updates different parameters to ensure that your calibration is as close as possible to the target calibration The target calibration is shown by the two blue gray lines near...

Page 41: ...tting all the parameters will make the calibration take a much longer time than normal If the calibration does not look right or is taking too long you can always Cancel and go back to the previously stored calibration Dose Rate and Fine Energy Calibration Your system has two additional calibrations that are performed at the factory One corrects the dose rate for individual variations in the detec...

Page 42: ...o appears just below the tabs as shown To change to another menu when the tab is selected you may use the RIGHT and LEFT arrow keys In this case the RIGHT arrow key will take you to the Spectral Data menu while the LEFT arrow key will also wrap around and bring you to the Help menu If you are somewhere in the middle of a menu and want to quickly return to the tabs you can press the MENU key to do ...

Page 43: ...t is displayed Check Option On or Off Another simple procedure is to turn an option on or off For these items a check box is shown as in the example of the Audible Count Rate To change whether the option is enabled or not highlight the menu item and press ENTER to toggle the check mark Alternately the LEFT and RIGHT arrows will also toggle the check mark Adjust Slider A few features particularly d...

Page 44: ...re may be a minimum and maximum value When the minimum is reached the left arrow disappears from the screen and LEFT will no longer make a change the same is true for RIGHT when the maximum is reached Isotope List All Isotopes in Library 11C 13N 18F 22Na 24Na 40K 42K 43K 46Sc 48V 51Cr 52Mn 54Mn 52Fe 59Fe 55Co 57Co 58Co 60Co 64Cu 67Cu 65Zn 69mZn 67Ga 72Ga 72As 74As 76As 75Se 77Br 81Rb 84Rb 85Sr 89S...

Page 45: ... interval until it reaches a minimum setting Pressing the RIGHT key will increase the value up to a maximum If the existing steps are not satisfactory you may change the value one digit at a time by entering the free edit mode This is done by pressing Enter while the menu item is highlighted you will see the display change to appear like the display here Once in this mode LEFT and RIGHT move to di...

Page 46: ...ril or February Pressing the LEFT and RIGHT keys will change to another field When you have the date you would like press ENTER to return to the normal mode Note that if you press the LEFT and RIGHT arrow keys again the date will change back to Any However the system will remember the date you entered and if you press the arrow key again you will get back your edited date User Menus Four menus are...

Page 47: ...42 34 BNC list of common check sources and laboratory isotopes MED list of medical isotopes normally a subset of the ANSI list IND list of industrial isotopes normally a subset of the ANSI list SNM list of special nuclear materials normally a subset of the ANSI list In addition to changing lists with LEFT and RIGHT pressing ENTER will display the contents of the currently selected list You can pre...

Page 48: ...klight is one of the largest consumers of battery power changes to this setting can significantly impact your battery life It is recommended that this be set to the lowest setting that still gives a comfortably readable display Backlight Timeout You can set the timeout for the display backlight The backlight will turn off if there is no activity for this amount of time To turn the backlight on aga...

Page 49: ...hose spectra This menu is the same for both User and Administrator modes Figure 20 Spectral Data Menu When either the Review Stored Spectra or the Clear Stored Spectra operation is chosen the next screen brought up is a sub menu that is used for searching the catalog of stored spectra as shown in Figure 21 As you can see this menu is shown in gray rather than color indicating that it is a sub menu...

Page 50: ...ectra This step may be less important when displaying spectra especially if your filter is very narrow However when clearing spectra you must individually go through and check each spectrum that you wish to clear as a confirmation that you really wish to delete that spectrum permanently Note When clearing spectra you can never check the currently used background spectrum as indicated by a red X in...

Page 51: ...ys Previous and Next will take you through the list of spectra you selected in the previous step Figure 22 and the third item will let you see Dial Bars and Spectrum views of the data There is no equivalent to Finder because this requires time series data Configuration The User configuration menu is very short and contains only a few of the items shown on the Administrator version of the same menu...

Page 52: ...e rates are stored internally in the same units so this has no effect on stored data but only on the way it appears on the display When viewing the full Administrator menu you will see that the dose level settings also change to match the currently selected unit value Language This allows you to select among different user interface languages Full support for languages other than English may requi...

Page 53: ...Configuration Extra Items The Administrator Configuration menu is shown in Figure 26 The last three items are identical in function to those found for the User The additional items are described below Figure 26 Administrator s Configuration Menu Dose Rate Alarm Level This setting determines the dose rate required to set off the dose rate warning alarm This is specified in the units given by the Do...

Page 54: ...ill set off the personnel protection or turnback alarm This is specified in the units given by the Dose Rate Scale further down in the menu The system will flash the screen red and sound a distinctive audio alert when this level is reached Admin The Admin menu is shown in Figure 27 This menu contains utilities for setting up the instrument and changing the protections of the various modes Figure 2...

Page 55: ...submenu is shown in Figure 28 and Figure 29 Figure 28 Access Controls Submenu Part 1 Figure 29 Access Controls Submenu Part 2 Each of the items shown corresponds to a different feature that may be either enabled or disabled for the selected log in Rate Meter Dial through Spectral Display determine which search modes are enabled The four Report items enable and disable separate sections of the on s...

Page 56: ...ing Select a short sample if a quick response is required Select a longer time if more averaging is desired or to reduce stray bars displayed in the Bars mode Dose Rate Display Threshold This setting applies only to the Bars mode It determines the minimum per isotope dose rate that is required before a bar will be displayed Once the dose rate reaches this level for one Sample Time period the bar w...

Page 57: ...rows respectively It is recommended that if you need to change the time zone you do this first The hour and possibly minute will be automatically updated when you make this change Finally press ENTER to accept the currently shown date and time Network Setup The Model 702i and 711i supports Ethernet communications for remote data collection as described in Section 3 In order to establish communicat...

Page 58: ...ghlighted in turn By pressing ENTER you can then edit each digit with the UP and DOWN arrows and move between digits with the LEFT and RIGHT arrows Factory Settings There is an additional Factory Settings menu that is normally only used at the factory Under special circumstances including at Beta test sites this menu may be enabled but the details of how to use this menu are beyond the scope of th...

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