RT-50 LabCenter
Contents
1. Gain setup The Cs 137 was not found Check the presence of the Cs 137 test source error Insert in the spectrum during in the sample chamber it s orientation by the source and try Gain setup so the Gain labeled side to the detector down and run the again setup was not provided Gain setup again If error repeats call the service Field must be The required field Fill in the specified field filled specified behind this message was not filled in Device The spectrometer is not Check the connection to the spectrometer via communicating connected or does not USB cable and selection of the right equipment error Params respond according to the serial number in menu could not be Settings Measuring devices Gamma read measuring device confirm by Apply button 3 9 CHECKING OF THE SYSTEM CONDITION The RT 50 spectrometer is fully automatic system that adapts the internal parameters to the actual conditions of electronics or outside temperature This is done during Gain setup and Calibrate procedure Of course the system has limited range of parameters Also the detector can move the parameters due to the condition of the crystal photomultiplier and their optical contact The location of the detector inside the massive shielding in the laboratory ensure the best condition for the detector allowing it proper work for tens of years But nevertheless an error can appear The following routine can give you an idea about the actua2. RT SO Laboratory gamma ray spectrum analyzer with evaluation program LabCenter User Manual Edition 8 November 2010 SW Version 2 6 0 for Windows XP Vista or Windows 7 LABORATORY GAMMA RAY SPECTRUM ANALYSER RT 5O WITH EVALUATION PROGRAM LabCenter Production and service GEORADIS s r o Hudcova 56b 621 00 Brno Czech Republic Phone 420 541 422 231 Fax 4420 541 422 232 E mail info georadis com Web www georadis com GIEOISADIS 2 RT 50 User Manual Edition 8 Content Content Introduction 1 1 APPLICATION RANGE OF THE RT 50 1 2 PREPARATION OF SAMPLES 1 3 LIMITS OF DETECTION 2 Description of RT 5bO 2 1 CONFIGURATION AND REQUIREMENTS 2 2 MAINTENANCE 2 2 1 Recomended daily procedures 2 2 2 Monthly procedures 2 2 3 Storage and transportation 2 2 4 Safety 2 3 SERVICE SUPPORT 2 3 1 Repairs LabCenter SOFTWARE 3 0 INSTALLATION 3 1 FIRST RUNNING CONNECTION TO THE DATABASE 3 2 GRAPHICAL USER INTERFACE MAIN PANEL 3 3 FIRST START CONFIGURATION 3 3 1 Measuring devices 3 3 2 User s list 3 3 3 Nuclide list 3 3 4 Sample description 3 3 5 Measurement methods 3 3 6 Corrections 3 3 7 Other parameters 3 3 8 Reports 3 4 CALIBRATION 3 4 1 Gain setup 3 4 2 Calibration 3 5 MEASURING OF SAMPLES 3 6 RESULTS 3 7 PROGRAM TERMINATION ENDING THE PROGRAM 3 7 1 Info about the program 9 7 2 Logout and program termination 3 8 ERRORS AND SYSTEM MESSAGES
3. in activity xls The example follows GEORADIS RT 50 User Manual Edition 8 37 Actual activity calculation for ROCK samples Type correct value for Actual date correct values for activities will be automatically generated Etalon G100 Reference date K40 Cs137 U Th 1 7 2006 Rel SD Rel SD Rel SD Rel SD K 35 3 3 6 83 3 K Ba kg 11 200 3 6 83 3 137Cs Bg kg 1 5 Ue ppm Ue Ba kg The ppm The Bg kg Actual date K40 Cs137 U Th 20 9 2006 Rel SD Rel SD Rel SD Rel SD 1K 3 6 83 3 K Ba kg 3 6 83 3 Cs Ba kg 1 5 Ue ppm Ue Bq kg Th ppm The Bq kg 4 3 DATA FORMAT All data is stored in the main database file Lab fdb Its structure is flexible and reflects customer s setup The Lab fdb is controlled by SQL server and can be simply accessed or modified with any SQL browser We recommend freeware program FlameRobin The manufacturer s selection of SQL database protocol is to give the customer an indirect full access to the stored data and to allow integration if required of the RT 50 Lab into the customer s own database network structures Copying of the Lab fdb to different locations allows the user to simply backup the database and protect the data All questions regarding databases please forward to info georadis com GEORADIS 38 50 User Manual Edition 8 4 4
4. 3 9 CHECKING OF THE SYSTEM CONDITION 4 Technical information 4 1 GAMMA RAY SPECTROMETER RT 50 1 Detector and analog processor 2 Analog to digital converter 3 Mechanical A Environmental 4 1 5 Software 4 2 CALIBRATION WORKING STANDARDS 4 2 1 Cesium test Sample 4 2 2 Steel standards 4 2 3 Slag and dust standards 4 2 4 Geophysical standards GEORADIS N eoo Ul RT 50 User Manual Edition 8 3 4 3 DATA FORMAT 38 4 4 CORRECTION FILE FORMAT 39 5 nhanced software options 4 5 1 USEFUL FREEWARE 41 5 1 1 Acrobat Reader 41 5 1 2 Decay 41 5 1 3 Flame Robin 41 5 1 4 PDFCreator 41 5 1 5 POEdit 42 5 2 SOFTWARE FOR EXTERNAL COMMUNICATION WITH THE DATABASE 42 5 3 MECHANICAL COMPLETATION OF SPECTROMETER RT 50 42 4 RT 50 User Manual Edition 8 Introduction The RT 50 laboratory spectrometer is a 1024 channel gamma ray spectrometer with a cylindrical Nal TI Sodium lodide scintillation detector 3 diameter x 3 height enclosed in heavy lead shielding with a minimum wall thickness of 3 5 inches 9 cms A specially designed lid permits easy sample loading and removal The analyzer unit has an integrated high voltage supply amplifier analog digital converter plugged directly onto the detector socket The RT 50 spectrometer unit operates under the control of the system computer PC via a USB cable The USB cable also supplies all necessary power to the unit
5. CORRECTION FILE FORMAT The correction file could be used for any type of correction of the activity evaluation It is used in case that the geometry of the measured sample and calibration samples are not exactly the same and the activity can be re calculated according to the known formula or table found from the experiment The formula must be used for table calculation to allow LabCenter SW only one correction format The file with correction table must be in the text only form The first row has only one number ratio between the parameter of the calibration sample and entered unit For instance calibration sample for STEEL mass activity measurement has the thickness 10 mm and the thickness is entered in mm so the ratio is 10 1 0 1 The second row starts Param followed by the name of nuclides for which the corrections are calculated The names must be typed in the same form as is used in Setting List of Nuclides When this row is missing so the first correction is applied to the all found nuclides The followed rows have some numbers separated by tabulator The first number is the value of the parameter used for correction sample thickness divided by this value for the calibration sample so the value for calibration sample is any time 1 while the next numbers are a relative efficiency of the measurement in comparison to the calibration sample so the value for calibration sample is 1 again The order of values agrees with t
6. Save correction Remove correction Picture 3 10 To assign the correction table to appropriate measuring method a row from the list on the tab with requested method must be selected first Then become accessible button for assigning describe the field for correction choose the sample parameter used for correction and select the file with the appropriate table usually in the subfolder CORR Confirmation by Add correction button the table is load to database and ready to use in evaluation process Being assigned the table can be edited saved or removed as it is seen on the buttons in the Corrections window Using this possibility is recommended only for advanced users due to it has the essential influence to the analysis results In any doubt contact the producer technicians 3 3 7 OTHER PARAMETERS Tab Other parameters Picture 3 11 allows selection of the following e Stabilization nuclide instructs the MCA which peak pattern will be used for setting of the gain Currently only Cs 137 data is available in two modes Gain only is used for quick stabilization during normal operation Gain amp Offset is used in case of doubts about the correct energy calibration positions of peaks The second method takes longer time see the paragraph below Producer suggestion is to set the Stabilization period to 200 seconds instead of 60 seconds in case of Gain only setting GEORADIS RT 50 User Manual Edition 8 21 Other parameters St
7. User can GEORADIS RT 50 User Manual Edition 8 17 edit current add new or delete nuclides from the list The editing is fully interactive and the user must fill all relevant data on the editable sheets It is obvious that unskilled change of any number can lead to fatal errors during evaluation Buttons New nuclide Edit nuclide and Delete nuclide activate related edit sheets Editing of ROIs follows same principals The pop up window with the list of nuclides from the library for nuclides identification appears during adding new nuclide to choose the same description for nuclide used in calibration and identification mode of evaluation 3 3 4 SAMPLE DESCRIPTION Tab Sample description Picture 3 8 allows to user to define its own database structure as every user has different requirements on sample identifiers Sample description tool helps to integrate LabCenter data output to existing company data structures Each sample description item has its unique Name simple Description Type Minimum and Maximum value and Allow empty attribute The Name is a unique name that will be assigned in the database It is highly important to follow user s internal company s own procedures for creating data structures to guarantee a future compatibility inside the company s database The Description is used to better specify the content Type of the item defines its format The following types are predefined Sample description Name Descri
8. 1 APPLICATION RANGE OF THE RT 50 1 1 1 2 RT 50 is controlled from a standard PC using the LabCenter software program The LabCenter program calculates from measured gamma spectra concentrations of natural radioactive elements K 40 U natural and Th natural or the activities of man made elements typically Cs 137 Co 60 and Am 241 The range of tested elements can be extended by the use of suitable calibration standards Correct activity computation requires geometrical conformity with the calibration standards Size mass material and even the positioning of the sample in the detector should be as similar as possible as those of the calibration samples to achieve the best results and optimize system performance A description of the basic supplied standards can be found in chapter 4 2 Use of heavy lead shielding 9 cm wall thickness allows the RT 50 to reach very low level detection limits of various radionuclides The lid of the measuring chamber must be kept closed during the measurement process PREPARATION OF SAMPLES 1 3 Preparation of steel samples does not require any special procedures The steel calibration standards are designed to copy the typical geometries of samples commonly used in the steel industry The sample temperature must respond to the detector temperature which means it must be equal to ambient room temperature Dust and slag samples must be milled and homogenized in suitable measuring cans which
9. 14 4 2 1 CESIUM TEST SAMPLE There is delivered little yellow knob containing 9 kBq 0 25 of Cs 137 for adjusting of the gain Its activity is below a limit for radioactive materials adopted in the EU The standard does not belong to category of radioactive materials in any respect of valid European jurisdiction 4 2 20 STEEL STANDARDS The Steel calibration standards are made from steel artificially contaminated with radionuclide Co 60 Half life 1925 days The activity of the standard was preciously measured by independent method and linked to the standards of the Czech certification authority Basic set contains one standard with determined activity and one void sample for background determination The standards are labeled with code Level of activity is coded by letters A Z followed with serial number There is available a spreadsheet Actual activity calculation xls on the installation CD All activities can be recalculated to any suitable date The user can use the following table Actual activity calculation for STEEL samples Type correct value for Actual date correct values for activities will be automatically generated Measured values must be between Minimal value and Maximal value Actual activity Sample 701 5 N 701 5 M 701 5 L 701 5 K 701 5 Ba gram C6 66 D C6 0Co 0 00 7 82 4 29 1 85 0 48 Actual date 10 2 2006 0 00 6 76 2 7 1 60 0 41 Standard deviation 1 6 1 8 3 9 5 0 Minim
10. 3 6 lists defined users and their access rights Login name First name Last name and Clearance are stored with every result or calibration The Clearance limits access rights by categories There are 16 RT 50 User Manual Edition 8 e Administrator full access to all files and features It is restricted for manufacturer s personnel e Power user partially limited access for calibration measurement and parameter setup It is rated for managers e User limited access for worker Only measurement and gain setup are accessible Adding a new user or modification of a current user can be done Buttons located on the right side of the list Touching any of the buttons leads to an editable popup screen The user can change any of the items New values are stored after touching buttons Add user or Modify user To exit screen without any change use the Cancel button Delete user opens a confirmation window to double check operation before permanent data erasing 3 3 3 NUCLIDE LIST Only suitably qualified personnel should edit the following tabs Nuclide list Name Harir Cs 137 30 17 Years Milion years Edit nuclide Million years Million years Delete nuclide Add ROI Edit ROI Remove ROI di Picture 3 7 Tab Nuclide list picture 3 7 is a list of nuclides with their half life and ROIs region of interest which can be assigned to any spectral evaluation method
11. Calibrate Settings Info Logout Quit Results Period Last 31 days Method User name Device Measured User name Sample serial Sample weight Sample thickness Method Device Print report Delete sample Export spectrum Export all Nuclide Activity Std dev peau 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 Measure time 0 Quality of fit 0 000 Live time Oms Clock time 0ms 12 Device connected rj Database connected Gain setup ok Administrator Sql o 09 39 01 09 11 2007 Picture 3 4 e Main bar with program s name e Main menu bar with text items File and Measure e Below the main menu bar is a bar with icons speed buttons e Compo boxes below icons serves to filtering of displayed results User can select criteria for faster orientation in the results database Sorting keys are Day Period Method of Measurement User Name and Device e Atthe very bottom of the page is a status bar with five message fields The first field is reserved for MCA status There are three messages alternating Device connected Deviceless mode for any demo or reanalysis from database and Device not connected A correct login in to database indicates a message Database connected second field from the left Message Database disconnected announces any problem with the database The third field indicates readiness to measure Message Gain setup alternates with error message Gain setup timeout wh
12. Edit is software for creation of the software translation The LabCenter has the subfolder locale with subfolders of various languages according to the Windows habits Each of them contents file labcenter po that can be simply translated using POEdit freeware The new file labcenter mo is automatically generated after saving of the translation This file starts to be active after the selection Setting Other setting Language and LabCenter restart All software messages and reports are taken from this file The detail manual is stored in English text file in the folder POEdit on CD due to the translation is provided from the basic language of the software English 5 2 SOFTWARE FOR EXTERNAL COMMUNICATION WITH THE DATABASE The folder develop contents the LabCenterlnt zip file with the examle of software for external communication with SQL database labcenter in subfolder src The source code in C is in the same folder The SW description with possibilities of use is in subfolder doc The SW is designated for software engineers who supply the data transmission inside the internal net of the user 5 3 MECHANICAL COMPLETATION OF SPECTROMETER RT 50 The video folder contents the instruction film how to complete RT 50 together The file has Windows Meta Video WMV format that can be run on the computer with basic Windows installation No special SW is necessary for viewing it The video film is made out for the users which do not o
13. Manual Edition 8 9 In case of any malfunction please contact our local service center dealer or the manufacturer direct The Manufacturer s service center is accessible on Phone 420 541 422 231 E mail info georadis com 10 AT 50 User Manual Edition 8 3 LabCenter SOFTWARE 3 0 INSTALLATION 3 1 The LabCenter software should start automatically after inserting the CD into the PC In the event that startup does not work automatically call Start exe from the main directory of the CD Installation menu Picture 3 0 will display It is essential to install all three parts during the first installation Uploading or re installing any of them in future can be done separately Part can be installed in any order Pressing button with written label user triggers installation of chosen part Installation runs automatically and returns back to the installation menu LABCenter installation menu Install Georadis USB driver Install Firebird SQL Server Install Georadis LABCenter Picture 3 0 Install Georadis USB Driver is execute on the PC with connected RT 50 Install Firebird SQL Server is execute on the PC where the data will be stored Install Georadis LabCenter is execute on the PC for spectrometer control Notes In the simplest case it is only one computer but those works could be divided between more computers USB Driver is not necessary in case of DEMO installation Supervising of
14. Range 500 1000 V DC digitally controlled in 4096 steps 4 1 2 ANALOG TO DIGITAL CONVERTER Type Number of channels ADC Dead time Integral nonlinearity Differential nonlinearity Lower threshold Upper threshold ADC Offset Dead time correction Communication interface Power requirements 4 1 3 MECHANICAL Shielding HxWxD Weight 4 1 4 ENVIRONMENTAL Working temperature range Store temperature RFI EMI Emission GEORADIS Successive Approximation ADC double buffered high speed 1 5 ms with digital linearization 1024 Ch 0 1 Life Time ch 2 1022 spectral data ch 1023 cosmic channel Zero additional dead time including memory cycle max 0 1 full scale over top 99 of range max 1 95 full scale over top 99 of range Digitally adjustable Fixed to channel 1022 all pulses above this level are Cosmic and are accumulated in channel 1023 Digitally adjustable Automatic 0 1 precision USB type A M 2 0 1 0 1 1 compatible 5V 100 mA DC powered from USB Steel minimal thickness 85 mm optionally lead 770 mm x 360 mm x 620 mm 30 x14 x24 410 kg 900 Ibs with lead shielding 580 kg 1280 Ibs 0 to 40 C 20 C to 60 C Complies with FCC rules 47 CFR Part 15 for class A RT 50 User Manual Edition 8 35 4 1 5 SOFTWARE Operating system Database server 4 2 CALIBRATION WORKING STANDARDS Windows 2K XP or Linux with Kernel 2 6 Firebird SQL 2 0 ISO IEC 9075 1
15. the present ones The following calculation of the activity is provided from the peak areas No calibration is necessary for this method but the results are not as accurate as those ones obtained via LSQ method No Standard Deviation is calculated the results should be taken as estimation value Detection of peak that is not belonged to any nuclide from the library results to Unidentified nuclide with zero activity due to unknown efficiency of measurement When both methods LSQ and NA evaluate the same nuclide only result calculated via LSQ is displayed on the screen with both labels C calibration and identification compare chapter 3 6 The name of nuclide must be the same in both methods using different names gives two results for the same nuclide Use Edit Method for correction or Delete method for erasing There are three windows below the Measurement method list Each method consists of predefined Nuclides calibration standards used etalon and database structure for sample description Each method can have different nuclides sample descriptors and nuclides that allow creation of a wide scale of methods These components are fully editable for each method To add a new standard press button Add etalon and edit sheet Add a new etalon The following items must be entered for each standard e Name specific name of the standard It should link or copy the name printed on the physical calibration standard e Description
16. the folder and database confirmed by Open button causes the database connection It s name and path is displayed under the buttons for database manipulation When the installation is provided by Administrator and the user have no access to the Administrator s Documents folder where the database can be located it is necessary to type the correct path and database name to the Open database window manually using keyboard without dialogue Select use The same way must be used for connection to the database on the computer connected by the PC net Delete database proceeds according to the Windows practice Database for deleting must be opened first after deleting the new one should be opened Creating or opening the database must be confirmed by clicking on the OK button The active window is closed Next run of the LabCenter proceeds according to the followed chapters GRAPHICAL USER INTERFACE MAIN PANEL The LabCenter is activated by clicking on the shortcut from the desktop The program is password protected When the popup window Database login picture 3 3 appears the correct user name and password must be entered to access the main panel Database login WD User name Administrator on Password Picture 3 3 The GUI main panel picture 3 4 has access features From the top down the following appear GEORADIS RT 50 User Manual Edition 8 13 LABCenter File Measure E amp w 8X Gainsetup Measure Results
17. want to abort sample measurement and selection buttons Yes and No The right upper corner of the spectral chart contains a popup window with SAMPLE MEASUREMENT in the header It is an animated status screen with all important information updated every second during measurement The following data is displayed e Method name of current measurement method e Measure time elapsed time preset time e Total counts number of all pulses registered in the whole spectrum e Average counts s average count rate e Dead time actual dead time e Sample Serial Number sample serial number or another name or label e Sample Weight weight of the sample e The sample thickness the sample thickness if used e Nextiteration in time to next preliminary evaluation e Quality of fit measure of conformity between spectrum of the sample and spectra of the calibrated standards This must be close to 1 one Poor conformity indicates the presence of another nuclide other than the one covered in the method 28 RT 50 User Manual Edition 8 c e m BI e Results preliminary results The evaluation is provided 30 seconds after the start of the measurement and thereafter every 10 seconds until the measurement is completed This preliminary evaluation offers a limited precision estimate of results before the final computation to help speed up the manager s decision process The meaning of the values is described in the chapter 3 6 Successful measurement is an
18. 1852 4 6 2 3033 1 8248 2 2292 4 7 2 343 8405 2 2733 4 8 2 383 8557 2 3177 4 9 2 4233 1 8705 2 3022 5 2 4637 1 8850 2 4069 5 1 2 5043 1 8992 2 4517 522 2 9451 1 9129 2 49617 5 3 2 5860 1 9264 2 5418 5 4 2 6272 1 9395 2 5870 5 5 2 6685 1 9523 2 6324 5 6 2 7100 1 9649 2 6778 SeT 2 1518 1 977 247234 5 8 2 7937 1 9891 2 769 5 9 2 8358 2 0008 2 8148 6 2 8781 2 0122 2 8607 GEORADIS 5 Enhanced software options The more programs are stored on the installation CD for enhanced use of LabCenter SW The installation SW itself is in the folder labcenter of the installation CD The next folders named develop utility and video are there as well The example of software for external communication with database designated for software engineers who supply the data transmission inside the internal net of the user is in the folder develop The user instructions are there too The folder utility contents installation files of useful freeware and folder video contents the file with guide for mechanical completion of the RT 50 spectrometer 5 1 USEFUL FREEWARE The folder utility contents 5 installation files of freeware useful for LabCenter use Those are 5 1 1 ACROBAT READER The mostly spread freeware for displaying the files in PDF format It is important for instance for reading the User manual in PC It is available after the LabCenter installation from the Start menu by selection Programs Georadis LabCenter Docs Manual Lang wh
19. abase User can also access the results via the speed button Results or by selecting results from the Measure menu The results screen consists of three windows The upper window displays a list of all saved measurement results ordered by time of measurement The time of measurement and the user name will help with orientation in database The user can select any row from the list Related results of the measurement selected will display in the window on left bottom corner Also the measured spectrum for the measurement selected is displayed in the third window on the bottom right RT 50 User Manual Edition 8 29 Buttons on the right allows user to output important information from the database It is possible to print results on predefined form Delete item from the database and export measured spectra as well as the complete data record in any ASCII file The results are shown in some columns The first one no label gives the flag C when this row is evaluated by LSQ method using Calibration or and I when the evaluation is done by NA method via nuclide Identification The meaning of the following columns is clear Std dev SD means Standard Deviation of the calculated activity calculated from the statistics of measurement Note that activities below the detection limit are in black color results with activities above the detection limit and below the followed limit are in blue color and results above the followed limit
20. abilization nuclide Cs 137 Gain only v Stabilization period s 120 Language English v Apply Picture 3 11 Stabilization period s Defines the time of spectra acquisition prior to stabilization error is displayed So it is maximal time of stabilization The suggested period for stabilization is 60 seconds The used photo peak s should reach 1000 counts in maximal counts channel Language of the user interface Change of the language is valid after restart of the LabCenter program For possibility of translation the LabCenter SW to different language see chapter 5 1 5 or contact the producer 3 3 8 REPORTS Tab REPORTS see Picture 3 12 allows choosing output forms for printouts Forms are written in html format and customer can arbitrarily modify them in any no formatting editor for instance Notepad User can assign forms for used sample types For indication of results above and below alarm limit can be used different forms To assign a form to appropriate measuring method a row from the list on the tab with requested method must be selected first Then become accessible buttons for assigning saving and deleting assignments to the predefined forms saved in the folder REP When no limit is checked the form Sample below limit is suitable Reports Sample under limit Sample above limit Assigned Mass activity of dust and slag Assigned Geological analysis Assigned Assigned Assigned Not assigned Save Samp
21. age Background measurement Calibration successfully completed Confirm by selecting OK When all standards and background measurements are completed the calibration is finished and a sample measurement can begin 26 RT 50 User Manual Edition 8 GIOIA DiIS Calibration setup 1 Calibration successfuly completed Picture 3 19 3 5 MEASURING OF SAMPLES New sample description Sample serial Sample thickness 0 00 Sample weight 0 00 Get Repeat Insert sample and start measurement Start measurement Picture 3 20 The speed button Measure or Measure sample item from menu Measure starts the measurement of a sample First the method of measurement has to be selected from the list displayed on the desktop Select the required method to activate the sample description entry form New sample description Picture 3 20 The number of displayed fields depends on the previous setup done on tabs Sample description and Measurements methods therefore the picture 3 20 is only illustrative All required information should be entered before Inserting sample in the measuring container sample chamber Ensure the lid is closed securely Measurement starts by selecting the start measurement button All fields with preset attributes Allow empty to No must be filled If this is not done then selecting Start measurement only triggers a warning message box with the message Field must be filled Any field with Field type Weight i
22. al value 0 00 6 65 3 64 1 54 0 39 Maximal value 0 02 6 87 3 77 1 66 0 44 An average of ten measurements To recalculate activity to new date a new actual date has to be entered and all activities will be recomputed automatically Notice to Half life correction Activity of any radioactive elements decreases in time A new activity is computed using a simple formula As an example we use a sample marked N with certified activity 7 82 Bq g Time left between the reference date and a new actual date is 405 days Actual activity certified activity x 2 life 7 82 x 2 09 1929 7 82 x 0 8643 6 76 Bq g 36 50 User Manual Edition 8 GEORADIS 4 2 8 SLAG AND DUST STANDARDS Unlike steel calibration standards the slag dust standards are made from milled regular slag with reasonable low concentration of natural radioisotopes Typical concentrations are native activity 0 04 Ra and 0 03 Ba g Th This raw material was artificially contaminated with specified radionuclide A well homogenized compact mixture is mixed with the silicon rubber and poured in standard measuring cans The standard volume 100 cm and height 35 mm responds to 120 grams of material The standards are labeled with the major radioisotope name and code TS11 nn where nn is the serial number of standard For example TS11 53 All activities of standards can be recalculated in the spreadsheet activity xIs Next are tabl
23. and results of NA method are in red color The activity above the followed limit and or presence of any nuclide out of calibration list caused message SAMPLE ABOVE LIMIT due to it is unexpected nuclide activity 3 7 PROGRAM TERMINATION ENDING THE PROGRAM 3 7 10 INFO ABOUT THE PROGRAM Program information cce mI LABCenter SW version 1 2 9 Build date Sep 24 2007 17 54 05 Server version WI V2 0 1 12855 Firebird 2 0 Database C Documents and Settings zeman Dol Logged user Administrator Device serial 10000011 FW version 3v04 Channels 1024 LUT chsum 61307 Flags 0x00 Close Picture 3 23 30 RT 50 User Manual Edition 8 Click on Info button results to the window Program information appears on the screen The SW version creation date server version and next info according to the Picture 3 23 are displayed Those parameters have reason only for service purposes Click on Close button close the window 3 7 2 LOGOUT AND PROGRAM TERMINATION To change a user the old user must first logout To logout choose Logout from the menu or via the speed button A new popup window picture 3 24 Logout with control question Do you really want to log out will display Touching Yes switches to Database login and a new user can enter see chapter 3 2 No will abandon the action and leaves the old user active Do you really want to log out No Picture 3 24 Program terminatio
24. d tolerances with user s sample specific mass 7 8 even surface of the base maximum diameter 50 mm minimum diameter 20 mm thickness 4 50 mm total weight 20 800 g e Dust dust or slag loose material in a can Volume 100 cm and apparent density 1 2 Recommended tolerances density 0 8 1 6 element size less than 5 mm in diameter GEORADIS RT 50 User Manual Edition 8 19 20 Rock loose material a can Volume 100 or 250 cm and apparent density 1 5 Recommended tolerances density 1 0 2 0 element s size less than 5 mm in diameter e Water dispersions in a can Volume 250 cm and density 1 0 Recommended tolerances density 0 8 1 2 no sediments The method of Least square analysis LSQ simulate the measured spectrum from the spectra of the calibration etalons the calibration procedure is necessary to provide before start of measurement The final results are as precise as possible The Standard deviation from the statistics is calculated for each value When Mass activity is set to Yes the mass activity is calculated during evaluation via LSQ method Otherwise the total activity is calculated The selection of Has limit to Yes causes the comparison of the results with the allowed limit generate the messages SAMPLE OK or SAMPLE ABOVE LIMIT The method of Nuclide analysis NA search the spectrum for peaks and position of the found peaks compare with the internal library of nuclides to find
25. dd a New method Edit existing one or Delete any of them Adding of a new method begins with typing the related button After opening an edit sheet the first step is to enter Name for the method and simple description The description is used for fast orientation Next it is necessary to preset measuring period in seconds and select measuring Geometry Last task is to select math formula for evaluation Least square analysis unit of results Mass activity eventually set up threshold for contamination alarm Has limit and evaluation via Nuclide analysis Select Add Method to store or Cancel to leave without change Measurement method list Name Description Geometry Measure period s measure period s 150 analysis Mass activity Has limits Nuclide analysis a Mass Activity of Steel Evaluation of Mass activity of Steel samples vis 15 Steel 300 600 Yes Yes Yes Yes Mass Activity of Dust and Slag Evaluation of Mass Activity of Dust and Slag Samples Dust 300 600 Yes Yes Yes No Edit method Delete method Name Nudide Det limit Alarm limit Units Pre Add nuclide Name Description date Exp date add stab Field Display Add field Cobalt 60 0 02 0 10 Bag 2 T58 N55 Test Sampl 01 01 2007 01 01 201 SAMPLE Yes THICKNESS Yes Edit nuclide Edit etalon THICKNESS Yes Remove field lt gt lt gt Picture 3 9 The following measuring geometries are available e Steel a steel cylinder with diameter 35 mm and height 10 mm Recommende
26. e maintenance but the user can take simple basic steps to ensure accurate measurement of samples It is extremely important to keep the measuring area sample chamber free of any potential contamination by radioactive elements The guaranteed sensitivities depend on a minimal radiation background We recommend that calibration standards and also the test samples are put in a suitable plastic bag before being placed in the sample chamber It is much simpler to dispose of a contaminated bag than to perform a complicated decontamination of the measuring area sample chamber The manufacturer recommends that the operator wipes the measuring area once a month with a clear tissue soaked in alcohol There are no maintenance requirements for next components of the instrument 2 21 RECOMENDED DAILY PROCEDURES Users will have to adjust procedures to suit their own requirements The following are recommended procedures that should be carried out at the start of every shift to ensure system performance is optimized e visually inspect the instrument and the measuring area sample chamber to ensure that it is free of dirt etc If necessary clean the chamber using alcohol or similar e run the gain set up procedure Gain setup chapter 3 4 1 to ensure the spectrometer is working under the optimal conditions 8 RT 50 User Manual Edition 8 2 2 2 MONTHLY PROCEDURES The user should carry out a more complete procedure each month to check
27. e selected one can be deleted Usually is used labcenter fdb in Documents LabCenter folder of the actual user Than the automatic templates could be used for the usual types of measurement compare Picture 3 2 Insert templates Steel Yes v Dust Yes Geological No Picture 3 2 Those are e Measurement of Co 60 in steel samples e Measurement of Am 241 Co 60 Cs 137 K 40 Ra 226 and Th 232 in dust samples or e Measurement of Cs 137 K 40 U nat and Th nat in geological samples The user select Yes at the type he want to use It is possible to select all of them some of them or no one The created template methods are exemplary ones There are proper radionuclides with suitable Region Of Interest ROI for their evaluation but it is RT 50 User Manual Edition 8 GEORADIS 3 2 necessary to modify the names of the etalons their reference dates and activities according to the Protocols and etalons supplied with the RT 50 spectrometer The user can define any number of the fields for sample description The only commonly used fields that are important for running of the SW or for evaluation of results are preset The details are in the chapter 3 3 4 Not using the preset templates the new empty database is created It is necessary to fill in all parameters and values for the method This is recommended only for advanced user Click on the Open database button opens the dialogue Open database The selection of
28. entioned in the Quality Assurance PROTOCOL as HV Potentiometer let say 10 Volts If more it means that the parameters of the detector or electronics were moved and was compensated by high voltage No influence on the evaluation process ADC gain fine setting of the gain varies in the range 0 95 1 05 If more the next iteration of the Gain setup runs automatically and it is compensated by HV value ADC offset gives the real shift between the zero of energy in keV and zero of voltage in mV Any value is OK but normally about 40 mV Temperature show the temperature on the processor measured by the internal thermometer Not far from the laboratory temperature but the precision is poor 34 RT 50 User Manual Edition 8 4 Technical information 4 1 GAMMA RAY SPECTROMETER RT 50 4 1 1 DETECTOR AND ANALOG PROCESSOR Type and size Resolution Energy range Reference source Shaping Coarse gain Fine gain Spectrum stabilization High voltage Sodium lodine thallium doted Nal TI volume 0 351 diameter 76 mm 3 height 76 mm 3 Photomultiplier bialkali Better then 9 FWHM at energy 662 keV 20 keV 3 0 MeV External Cs activity 9 kBq approx 0 25 mCi Bipolar time constant 1 ms Digitally controlled by High Voltage Digitally controlled 3 in 1024 gain steps Two point offset and gain correction Position 662 keV typically at 220 channel 0 1 channel
29. ere Lang means the shortcut of the manual language The newest version or different language versions are available on http www adobe com products acrobat readstep2 html 5 1 2 DECAY Decay is software including the overview of nuclides and their properties Interested in extension of list of nuclides in methods the user can get all the needed info in this database The calibration sample with known activity of this nuclide and selected geometry is necessary for its measurement The software is available on http 132 234 129 50 Downloads RadDec html 5 1 3 FLAME ROBIN Flame Robin is software for operation of SQL database It is useful for software engineers that want to get the detail info about the LabCenter database to include them to the company info system The software is available on http sourceforge net project showfiles php group id 124340 5 1 4 PDFCREATOR PDF Creator is software that allows the export of any file to PDF format The new printer PDF Creator appears in the computer after its installation The document is exported to PDF via printing it by this printer The file name and folder should be selected during this operation That is useful on the computers without printer for storage of the copies of various files like Protocols about the measurement and similar ones The software is available on http sourceforge net projects pdfcreator GEORADIS RT 50 User Manual Edition 8 41 5 1 5 POEDIT PO
30. ere a gain has to be adjusted prior to a measurement The timeout is preset for 8 hours which means that the system requires a gain setup every 8 hours Setting the gain every 8 hours minimizes any influence of the ambient temperature on results A user name actual date and time is displayed in the last field of the bar 14 RT 50 User Manual Edition 8 c e mL BI Main menu Clicking on File activates the following drop down menu e Logout user s logout e Settings program setup e Quit for quitting Clicking on Measure activates e Gain setup MCA gain adjustment e Measure sample measuring of a sample e Results browsing of the results database e Calibrate calibration procedures 3 3 FIRST START CONFIGURATION A default setup is done during the installation process Most users use the default setup settings For customers who want to customize their program the following procedure should be performed Activating of item Settings from menu or speed button Settings will generate six tab cards each with a variety of user selectable parameters 3 3 1 MEASURING DEVICES Gamma measuring device Scales Device type RT 50 v Scales COM port 10001024 No scales Axis 5008 Chyo YMC LABO MK 500C Mettler Toledo 5 5 Ohaus Adventurer ae Device 10001024 Scales Radwag PS Picture 3 5 The tab Measuring devices picture 3 5 harbors two windows with a list of selec
31. es for recalculation of activities of Slag standards Actual activity calculation for DUST calibration samples Type correct value for Actual date correct values for activities will be automatically generated Measured values must be between Minimal value and Maximal value Actual activity TS11 Bq gram SN 51 55 Reference date 1 1 2007 Actual date 15 5 2007 Standard deviation 96 Minimal value Bq Maximal value Bq An average of ten measurements To recalculate activity to new date a new actual date has to be entered and all activities will be recomputed automatically 4 2 4 GEOPHYSICAL STANDARDS The geophysical standards are made from rock with the high concentration of a specific natural radioisotope In case of Cs 137 there is used sand contaminated with Cs 137 from the area of Chernobyl There are two different measuring cans used for volumes 100 cm and 250 The effective height is then 35 mm respectively 40 mm and average weight 120 grams and 400 grams The basic set counts for standards K U and Th Name of standard is coded where G marks Geo standard Next is the volume used major radionuclide and serial number For example G100 U 02 is the 100 uranium standard All cans are carefully sealed to ensure a proper balance of daughter products Recalculation of activities is also possible but for very long half times of natural radionuclide has no practical sense Tables
32. he instrument is completely safe however it is important to keep the unit out of any aggressive liquids or gasses which could lead to chemical reactions causing lead containing chemical release Any opening of the RT 50 instrument s cabinet must be done with respect to the presence of lead All manipulation and movement of the instrument must be done under hazardous material safety policy It is recommended to call service center to provide all works by authorized and specially trained personnel End of life disposal of the instrument must be done in accordance with the regulations applying to heavy metals ECO and WEEE Waste Electrical and Electronic Equipment The shielding must be removed from the instrument and deposited as a heavy metal It is recommended to contact the manufacturer who will provide end of life disposal The RT 50 instrument is very heavy up to 580 kg 1280 pounds It is highly important to check the loading limit of the floor of the proposed location for the instrument The minimum loading limit requirement is for at least 2800 kg m Any manipulation with assembled instrument is prohibited 2 3 SERVICE SUPPORT 2 3 1 REPAIRS The RT 50 is a delicate instrument There are no user serviceable parts inside the equipment No unauthorized operation inside the instrument is permitted Such actions could invalidate the warrantee The manufacturer accepts no liability arising from such actions GEORADIS RT 50 User
33. he order of the nuclides in the second row The example of the thickness correction file follows 0 1 Param Co 60 Am 241 Cs 137 0 3 0 7727 0 2966 0 6084 0 4 0 8042 0 3667 0 6461 0 5 0 8360 0 4359 0 6800 0 6 0 8680 0 5034 0 7122 0 7 0 9001 0 5688 0 7437 0 8 0 9325 0 6317 0 7749 0 9 0 9650 0 6918 0 8061 0 9977 0 7493 0 8375 1 1 0306 0 8041 0 8693 2 1 0637 0 8565 0 9013 3 1 0970 0 9065 0 9338 4 1 1305 0 9543 0 9667 5 1 1642 1 0000 1 0000 6 1 1981 1 0437 1 0338 7 1 2322 1 0857 1 0680 8 1 2664 1 1258 1 1027 9 1 3009 1 1644 1 1379 2 1 3355 1 2014 1 1736 2 1 1 3703 1 2370 1 2097 2 2 1 4054 1 2713 1 2462 2 3 1 4406 1 3043 1 2832 2 4 1 4760 1 3360 1 3206 2 5 1 5116 1 3666 1 3584 2 6 1 5474 1 3962 1 3966 2 7 1 5833 1 4247 1 4352 GEORADIS RT 50 User Manual Edition 8 39 40 50 User Manual Edition 8 2 8 1 6195 1 4522 1 4743 2 9 1 6559 1 4788 1 5136 3 1 6924 1 5046 1 5534 3 1 1 7292 1 5295 1 5935 3 2 1 7661 1 553236 1 6339 3 3 1 8032 1 5769 1 6747 3 4 1 8406 1 5995 1 7157 3 5 1 8781 1 6214 1 757 3 6 1 9158 1 6427 1 7988 3 7 1 9537 1 6634 1 8407 3 8 1 9918 1 6834 1 8829 3 9 2 0300 1 7028 1 9254 4 2 0685 1 7218 1 968 4 1 2 1072 1 7401 2 0111 4 2 2 1460 1 7580 2 0543 4 3 2 1851 1 7754 2 0977 4 4 2 2243 1 7923 2 1413 4 5 2 2637 1 8088 2
34. ides and methods supplied by manufacturer The following formula can be used to determine limits in different conditions DL DL i m m DL sample detection limit DL detection limit of the standard m calibration standard weight m sample weight DL DL SQRT t t DL detection limit for new time of measurement DL detection limit for old time of measurement t standard measuring time t new measuring time 6 RT 50 User Manual Edition 8 c e m BI e Description of RT 5O 2 1 The RT 50 is a compact instrument see picture 2 1 which is controlled from a standard PC via USB interface The USB cable also supplies all operating power to the unit The solid base of the instrument case supports heavy lead shielding assembled from lead rings A sample chamber consisting of a thin aluminium container is inserted in the shielding The sample chamber is covered with a massive movable lead lid Its sophisticated design allows easy single hand operation Use of the handle guarantees safe operation of the lid However the lid is very heavy and extreme caution should be used when operating the lid The cabinet is coated with durable plastic for easy maintenance and cleaning At the rear there is a USB cable There are no other controlling or manipulating elements located on the instrument The instrument is fully controlled from the system computer Picture 2 1 CONFIGURATION AND REQUIREMENTS The RT 50 co
35. ithout the requirement to repeat the whole calibration procedure After selecting the button Calibrate or Measure a spectral chart will display on desktop Picture 3 17 with button Stop on top and label Calibration progress or Background measurement progress with progress bar on the right The x axis displays energies in the spectrum in keV The y axis counts the number of registered pulses in cnts Pre selected ROIs regions of interest are highlighted green in the spectral chart This allows the skilled user rapid orientation and supervision of the calibration process GEORADIS RT 50 User Manual Edition 8 25 LABCenter File Measure 220 x Gain setup Measure Results Calibrate Settings Info Logout CALIBRATION Mass activity of steel TS8 Co 7 300s 1011cnts 144cps 0 1 Wat Picture 3 17 Spectrum acquisition may be interrupted via the Stop button A message box Calibration abort picture 3 18 with the question Do you really want to abort calibration offers a last chance before abandonment of the standard measurement Typing Yes aborts measurement and the spectrum is lost No reverts the system back to the measuring loop Calibration abort J Do you really want to abort calibration Ee fee Picture 3 18 A successful run of a standard measurement run will finish with header Calibration setup picture 3 19 and mess
36. l condition of the system Check if the sample chamber is clean and no radiation sources are close to the RT 50 spectrometer 1 Measure the calibration sample as a regular sample if Mass activity of steel is one of the used methods measure the calibration sample of Co 60 in steel otherwise use the calibration sample of mostly used method with the simplest spectrum Cs 137 K 40 Co 60 Use the standard time of measurement no quick preview to obtain smooth spectrum 2 Lookto the view of spectra When the detector is in perfect condition the full peak s must be inside the highlighted area In case of Co 60 measurement both peaks should be there and the minimum between the peaks should reach as low as left border of the first peak or lower See the following picture 32 RT 50 User Manual Edition 8 140 peaks i p ld highlighted area right peak border left peak border minimum between the 250 50 750 1000 1250 1500 1750 2000 2250 2500 2750 3000 3 The results must show only nuclide of measured sample usually Co 60 and the activity must be in the region of 3 Standard Deviations SD from the certified value see Calibration Samples Protocol corrected to the actual date using half life of the nuclide Compare the Manual chapter 4 2 2 or 4 2 3 If no run Gain setup and or the Calibration according to the following steps and measure the sample again 4 Look to the Quality of fit the last i
37. l expected standards plus background will be measured Besides the standard s name information about the last performed calibration is also displayed The label Calibrated 07 16 06 11 41 39 displays the last calibration date and time or message Not calibrated alerts that the standard has not been measured at all Assigned button Calibrate starts the measurement The LabCenter software allows one single background measurement to be assigned to all standards button All Background or to measure partial background immediately after measurement of a standard Mass activity of steel Select etalon for calibration TS8 Co Not calibrated Calibrate Background not measured All backgrounds Local background Not measured Picture 3 16 Where a complete calibration of all required standards in one batch is undertaken itis not necessary to measure partial backgrounds for each standard However this must be done if only selected standards are measured Each standard measurement should be accompanied with actual background to allow for daily background variations The last item is Local background The local background is subtracted from any sample spectra in almost all computation methods It is recommended to measure impact of local background more often than the system is calibrated This is to minimize the background fluctuation on results As a time saving feature the Implemented calibration procedure allows correction of partial standards w
38. le under limit template Remove Sample under limit template Save Sample above limit template Remove Sample above limit template Picture 3 12 22 RT 50 User Manual Edition 8 3 4 CALIBRATION LABCenter amp 8X asure Results Calbrate Settings Info Logout Insert Cs 137 source and press START cents 104 0 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 12 Device connected Is Database connected Gain setup timeout f Administrator Sql o 09 28 17 09 11 2007 Picture 3 13 A calibration is a process that foreruns a sequence of measurements Calibration consists of measuring of samples with a known activity calibration standards and the response of the local background then computation of calibration matrixes The LabCenter performs this task automatically It is important to perform calibration with a well tempered and adjusted system because bad calibration will influence the future chain of measurements It is important to start the calibration process with Gain setup to compensate all gain shifts caused by temperature 3 4 1 GAIN SETUP Type Gain setup from menu item Measure or use speed button Gain setup A new button Start see picture 3 13 appears on desktop The button is accompanied with text label Insert Cs 137 source and press START The remaini
39. must have a size similar to those of the dust calibration samples The weight of the sample should also be similar to the weight of the calibration sample and within 30 Measuring containers that are repeatedly used should be carefully cleaned after each use to make sure there is no cross contamination of the measurement sample LIMITS OF DETECTION Sensitivity of measurement detection limit is influenced by several factors In addition to geometrical factors shape of sample the weight of the sample and measurement time are also important The following table gives the detection limits for most typical samples and measurement times GEORADIS RT 50 User Manual Edition 8 5 Laboratory spectrometer RT 50 produced by GEORADIS Brno CZ Detection limits for the selected radionuclides etalons TS11 100 ml 120 g Time of meas Cs 137 K U eq Th eq 300 s 5 35 1 0 5Bq 3 0 5Bq 3 0 ppm 900 s 3Bq 22Bq 0 6 3Bq 2 0 ppm 2 0 ppm 1800 s 2 15Bq 04 2 2 Bq 3600 s 1 4 10 0 3 1 4 Bo 1 4 1 0 Detection limits for the selected radionuclides etalons G250 250 ml 400 g Time of meas Cs 137 K Th eq 300 s 8 Bq 60Bq 0 5 8 Bq 8 Bq 900 s 5 35 0 3 5 5 1800 s 3 5 Bq 25 0 2 3 5 Ba 3 5 Bq Detection limits are calculated for radionucl
40. n ending the program occurs after activating Quit To end the program a confirmation popup must be activated Picture 3 25 Picture 3 25 3 8 ERRORS AND SYSTEM MESSAGES Error message Error description Remedial measure Device not The software has no Check the connection to the spectrometer via connected connection with the USB cable select and connect the right equipment for equipment according to the serial number in measurement of gamma menu Settings Measuring devices radiation spectra Gamma measuring device confirm by Apply button Database The software is not disconnected Log on the database server by procedure Login connected to the database using one of the right name and password The server with program logging must be started up the SW via setting calibration spectra Database setup and results of measurement GEORADIS RT 50 User Manual Edition 8 31 Gamma The spectrometer is not Check the connection to the spectrometer via measuring connected or has no USB cable and selection of the right equipment device must be response It is not possible according to the serial number in menu connected to to provide the selected Settings Measuring devices Gamma perform this function measuring device confirm by Apply button operation Gain setup Gain setup was not Start Gain setup procedure timeout provided or it takes more than 24 hours since last setting
41. ng desktop area is covered with a graphics chart Insert Cs 137 source in the sample chamber in the RT 50 and close the lid Push button Start icon and label of the button will flip to Stop see picture 3 14 Also the label on the right changes to Gain setup progress A new spectrum of the test source is being collected Progress of the stabilization is displayed on the bar on the top of the chart GEORADIS RT 50 User Manual Edition 8 23 LABCenter File Measure B amp O 8 x Gain setup Measure Results Calibrate Settings Info Logout Qut Gain setup progress OSS U SSS Sy GAIN SETUP Stage 15 Stage time 5 1205 High voltage 705 6V ADC gain 0 9860 ADC offset 37 94mV Temperature 17 0deg C Jl WW tay pw j ral 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 17 Device connected S Database connected Gain setup timeout Administrator Sql 09 28 50 09 11 2007 Picture 3 14 On the chart there is displayed an animated spectrum of the test source Expected positions of peaks are marked with red vertical lines Requested stabilization threshold is marked with a red horizontal line Once triggered a new ADC gain and offset is computed and applied System checks allowed deviations and in case of positive test result the message Gain setup succes
42. nounced with an acoustic tone and a box Measurement completed appears on desktop All results are now final and are automatically saved to the database Activating the OK button confirms the message The sample can then be removed from the measuring container sample chamber The system is now ready to measure a fresh sample N B The old user must log out before a new user can log on see End Program section 3 7 1 below 3 6 RESULTS LABCenter File Measure E c O8 X Gainsetup Measure Results Calibrate Settings Info Logout Quit Results Period Last 31 days Method User name Device Measured User name Sample Serial Number Sample weight The sample thickness Method Device 9 14 20 25 Administrator Sql Contamination by Cs Mass Activity of Steel 03 2009 14 11 41 Administrator Sql Contamination by Cs 75 00 10 00 Mass Activity of Steel 10001007 05 03 2009 14 00 24 Administrator Sql 255 74 00 10 00 Mass Activity of Steel 10001007 05 03 2009 12 03 34 Administrator Sql 155 75 00 10 00 Mass Activity of Steel 10001007 Activity 0 02 5 6 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 Measure time 300 Quality of fit 0 734 Live time 298286ms Clock time 298448ms 12 Device connected Database connected lw Gain setup ok Administrator Sql 14 26 43 05 03 2009 3 22 The results screen picture 3 22 displays immediately after login in to the dat
43. nsists of following parts Detector Nal Tl 76 mm x 76 mm 3x3 with integrated photomultiplier Multichannel gamma ray spectrometer Steel or Lead shielding with movable lid Stabilization standard Cs 137 TEST SOURCE Set of calibration STEEL standards Co 60 background USB cable Digital balances RADWAG WPS 600 C 10 with RS 232 port PC and 15 LCD monitor Installation CD for PC program LabCenter GIOIAADIS RT 50 User Manual Edition 8 7 e User s guide Selectable options are e Set of calibration standards G250 volume 250 ml U Th Cs background for GEO applications e Set of calibration standards G100 volume 100 ml K U Th Cs background for GEO applications e Set of 250 ml containers 100 pc e Set of 100 ml containers 100 pc e Set of calibration standards D100 volume100 ml K U Th Cs Co Am background for dusts and slags The standard RT 50 system includes the PC and the digital balance Customers have the option to supply their own PC and digital balance The following are minimal requirements for a PC supplied by the customer e Processor Intel Celeron 2 0 GHz or compatible e RAM 512 MB DDR e Hard disc 40 GB e CD ROM e VGA standard to support Windows XP e Microsoft Windows XP Professional 2 2 MAINTENANCE All functions of the RT 50 instrument except sample changing are controlled by software from PC There is no control element located on the instrument The RT 50 is designed for simpl
44. overall system performance In addition to regular cleaning see 2 2 it is recommended that the user makes a technical parameters check and a total recalibration You will find a guide in chapter 3 3 It is strongly recommended that the user keeps a record of the total calibration results and compares the results with those obtained in previous periods to check the overall system performance Where the user employs non standard calibration samples with non standard geometries it is important to repeat all calibrations 2 2 3 STORAGE AND TRANSPORTATION The RT 50 instrument must be stored in a dry and corrosion free environment Storing temperatures are from 20 to 50 C relative humidity up to 80 The instrument is extremely heavy It is prohibited by the manufacturer to move or transport the instrument en block A complete disassembly of the instrument is required If it is required to move relocate the instrument users must consult the manufacturer or a service center Any misuse or unauthorized movement of the equipment could invalidate the warrantee The manufacturer accepts no liability arising from such actions 2 2 4 SAFETY The RT 50 instrument may contain lead The lead is a dangerous heavy metal and it is important to follow all rules and procedures to protect health and environment Under normal circumstances the lead is covered inside the instrument and there is no unauthorized access to it Under normal circumstance t
45. ption Type Minimum Maximum Allow empty Remember last Sample serial es GNE WEIGHT Sample weight Weight No Yes REPEAT Repeat Integer number 1 20 Yes Yes THICKNESS Sample thickness Real number 4 00 60 00 No Yes Delete Field Picture 3 8 Integer number Real number a float number with decimal point String a chain of characters Weight this allows communication with scale After choosing a type the user will continue with button Next gt gt Entering Minimum and Maximum and Allow empty set up an internal policy and can protect user against typing errors For String types it is recommended to enter maximum length in characters Edit field allows a change of description Change of the Name and string length is restricted Typing button Modify field will update the database Button Cancel abandons the edit screens Selected existing items can be erased from the database by using Delete field 18 RT 50 User Manual Edition 8 c e m BI 3 3 5 MEASUREMENT METHODS Tab Measurement methods Picture 3 9 allows the user to select evaluation methods of spectrum analysis There are various methods implemented and final analysis of spectrum consists of them User can select suitable methods for his task The Measurement method list upper window displays currently usable methods with a basic description The next three selectable lists are for the selection of analyzed radionuclides related standards and sample descriptors The user can a
46. rder the installation and training due to any reasons 42 RT 50 User Manual Edition 8 c e m BI
47. s editable directly from the keyboard or to receive the actual weight from scale on line click button Get When measurement starts an animated chart is displayed on the desktop accompanied with button Stop and progress bar on the right picture 3 21 The screen is similar to the calibration screen but with the addition of the label Sample measurement progress The X axis scales energies in keV and y counts impulses cnts in spectral channels ROIs are highlighted in green GEORADIS RT 50 User Manual Edition 8 27 LABCenter ey File Measure 5 E x Gainsetup Measure Results Calibrate Settings Info Logout Quit Sample measurement progress SAMPLE MEASUREMENT R Method Mass Activity of Steel Measure time 17 300s Total counts 227cnts Average counts s 13 4cps Dead time 0 0 Sample Serial Number 255 Sample weight 75 00 The sample thickness 10 00 Next iteration in 13s Quality of fit 0 00 Results Nuclide Activity III NI Wi DEL TE AL il AM O 100 200 300 400 S00 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 12 Device connected 587 Database connected w Gain setup ok Administrator Sql 11 58 51 05 03 2009 Picture 3 21 Pressing Stop interrupts the measurement at anytime Any action can be aborted through the confirmation box Sample measurement abort with message Do you really
48. sfully completed will show A negative test leads to repeating of the stabilization procedure Three attempts at successful stabilization are permitted Unsuccessful gain setup means a fatal problem and the process of calibration or any measurement cannot continue Notes The successful gain setup is confirmed on the bottom bar by the message Gain setup ok The new gain setup is asked after 24 hours by the message Gain setup timeout If the time from the last Gain setup is longer than 120 hours 5 days the SW ask providing the Gain setup twice to increase its precision 3 4 2 CALIBRATION A Power user or Administrator is required to perform calibration Calibration starts after selecting Calibrate from the Measure menu or via speedbutton Calibrate An interactive list of available measuring methods shows on desktop picture 3 15 with Select measurement method for calibration in the header The required method to be calibrated is selected via the related button The next screen will show Select etalon for calibration picture 3 16 24 RT 50 User Manual Edition 8 GEORADIS Select measurement method for calibration Mass activity of steel Analysis of Cobalt in steel Mass activity of dust and slag Analysis of Am Cs Ra Co K Th in dust and slag Geological analysis Analysis of K U Th Cs in natural samples Picture 3 15 LabCenter software allows measurement of each standard independently The user must ensure that al
49. simple description e Reference date date when the activity of the standard was certified e Expire date date of usability e Radionuclide partial activities of all nuclides in standard Edit date from selectable edit fields to use acceptable date format Clicking on button Add etalon saves a new standard Cancel to abandon the edit Future correction is possible type Edit etalon and continue in Modify etalon sheet The activities in this table visible by moving the bar below the window are shown like 4 34 3 95 where the first number is activity of nuclide to reference date given in Protocol while the second number is actual activity to the current day and time The last window defines the fields visible for the selected method RT 50 User Manual Edition 8 3 3 6 CORRECTIONS Tab Corrections Picture 3 10 allows including the correction of the activity evaluation according to one of parameters The basic use of this is the correction for the sample thickness in case of mass activity of Co 60 in STEEL samples due to it may vary between 5 and 20 mm The table of correction function must be saved on the hard disk in text form to be downloadable to the database The details about it s structure are in the chapter 4 4 Corrections Method Correction Parameter Mass activity of steel Thickness correction THICKNESS Mass activity of dust and slag Not assigned Edit correction Geological analysis Not assigned
50. table items Gamma measuring device and Scales The LabCenter supports different types of MCU Measuring devices and balances from different manufacturers The relevant MCU or Scales can be selected by highlighting the relevant item from the list Clicking Apply will trigger communication with the selected device The serial number of the chosen instrument is displayed if the initialization is successful GEORADIS RT 50 User Manual Edition 8 15 The manufacturer supports two types of MCA RT 50 Georadis and GR 320 SAIC Exploranium On the list of scales there are Axis A500 Chyo YMC LABO MK 500C Mettler Toledo AB S or PB S Ohaus Advanturer Radwag WAA WAS WPS and Radwag PS LabCenter expect the communication with any scales via serial line User can find default set up for most common scales in the next table Radwag Scales OHAUS WAA WAS Radwag Type Advanturer WPS PS Baud Rate 4800 2400 2400 2400 4800 4800 DataBis 8 8 8 8 8 8 Parity No No No No No Stop Bi i i Flow Character for Weight SI D S SI S Sending If other scales are to be used then a separate driver for that scale can be added to the LabCenter The customer shall submit a data and command format to the manufacturer in order that the plug in can be integrated with the program 3 3 2 USER SLIST Users list Login First name Last name Clearence Administrator Sql Administrator Administrator Picture 3 6 Tab Users Picture
51. tem in the SAMPLE MEASUREMENT field It should be lower than 5 The ideal value is 1 it can happen that it is lower than 1 it does not matter When this value exceeds 5 the Calibration is strongly recommended Do not forget to run the Gain setup before the Calibrate procedure 5 Goto Results menu and select the newest sample in the upper field Than activate the Details list in the left bottom field of the LabCenter window The Quality of fit is the first item there The fifth item is Gain correction This parameter was used during the simulation of the measured spectra from the calibration ones and should be close to value 1 00 let say 0 98 1 02 If not provide the Gain setup and repeat the measurement 6 When Gain setup and Calibration is not necessary to provide or was finished the results of the measurement must be OK otherwise the electronics or detector is unstable and must be completely replaced and the spectra view should looks like the picture above otherwise the detector lose the quality The Nuclide Identification does not work precisely in that case and the block of electronics with the detector should be replaced soon The calibration every month week is recommended as well to avoid inaccurate results Notes During the Gain setup the following parameters are displayed on the screen GEORADIS RT 50 User Manual Edition 8 33 High voltage should be between 450 and 1000 Volts but close to the original value m
52. the results can be done only with LabCenter installation The RT 50 spectrometer can be connected to the PC after successful installation of USB Driver It starts New Hardware Guide Refuse the connection to the Windows Update on the first screen via Not now selection and confirm all other suggestions FIRST RUNNING CONNECTION TO THE DATABASE The user must arrange an access to the SQL server that support storage of the settings and results It can be used with any customer s SQL using customer defined access to their own network or can be run on a local SQL server on the local PC delivered by the manufacturer It is arranged automatically during the first startup of the LabCenter or it can be run any time via program Database setup shortcut Database setup located on Georadis LabCenter folder in Startup menu GEORADIS RT 50 User Manual Edition 8 11 12 The selection of the database language appears first followed by the screen like Picture 3 1 Database administration Server Password w Local computer Q No database assigned Picture 3 1 After the selection of the computer where the database is located the password must be entered The initial password is The password can be modified later according to the chapter 3 3 2 Click on the Connect button activates the bottom part of the window As the button descriptions leads new database can be created the existing one opened or th
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