Troxler 3241 Series Manual Of Operation And Instruction Download Page 1

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Troxler Electronic Laboratories, Inc. 

3008 E. Cornwallis Road 

 

P.O. Box 12057 

Research Triangle Park, NC 27709 U.S.A. 

Phone:  1.877.TROXLER 

Outside the U.S.A.: +1.919.549.8661 

Fax:  +1.919.549.0761 

www.troxlerlabs.com 

Summary of Contents for 3241 Series

Page 1: ...i ie es s A As sp ph ha al lt t C Co on nt te en nt t G Ga au ug ge es s Troxler Electronic Laboratories Inc 3008 E Cornwallis Road P O Box 12057 Research Triangle Park NC 27709 U S A Phone 1 877 TROXLER Outside the U S A 1 919 549 8661 Fax 1 919 549 0761 www troxlerlabs com ...

Page 2: ...ts Reserved No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or information storage and retrieval systems for any purpose without the express written permission of Troxler Electronic Laboratories Inc PN 104575 Edition 13 February 2012 ...

Page 3: ...Model 3241 Series iii ...

Page 4: ...ove IL 60515 Phone 1 630 261 9304 Fax 1 630 261 9341 TroxTechSupport troxlerlabs com Western Office Service Center 11300 Sanders Drive Suite 7 Rancho Cordova CA 95742 Phone 1 916 631 0234 Fax 1 916 631 0541 TroxTechSupport troxlerlabs com Southwestern Office Service Center 2016 East Randol Mill Rd Suite 406 Arlington TX 76011 Phone 1 817 275 0571 Fax 1 817 275 8562 TroxTechSupport troxlerlabs com ...

Page 5: ...t Gauge The Model 3241 Series Manual of Operation and Instruction contains information on setting up and operating the gauge Basic parameter set up sample preparation reading storage and advanced operation are included Basic maintenance and troubleshooting are also included to keep the gauge in the best condition possible ...

Page 6: ...ut this manual the following symbols and special formatting are used to reveal the purpose of the text NOTE Notes indicate important information that must be read to ensure proper operation KEY This style indicates a key or character on the keypad 1 Indicates a procedure with multiple steps Indicates a list of things needed such as equipment or important points to know Indicates that more than one...

Page 7: ...Taking Background Counts 3 7 Preparing Samples 3 8 Taking a Measurement 3 9 CHAPTER 4 CALIBRATIONS Equipment Needed 4 2 Preparing Calibration Samples 4 3 Sample Mixing 4 5 Performing the Calibration 4 10 Reviewing a Calibration 4 14 Enabling a Stored Calibration 4 15 Manually Entering Calibration Data 4 16 CHAPTER 5 PROJECTS The Project Function 5 2 Storing a Measurement 5 4 Printing Measurement D...

Page 8: ...7 SPECIAL FUNCTIONS Stat Test 7 2 Drift Test 7 4 Recover Erase 7 6 Time Date 7 6 Calibration Transfer 7 7 Baud Rate 7 14 Customer Name 7 15 Serial Number 7 15 Pan Weight Display 7 16 APPENDIX A RADIOLOGICAL INFORMATION Radiation Theory A 2 Radiation Safety A 7 3241 C 100 mCi Radiation Profile A 10 3241 C 300 mCi Radiation Profile A 11 3241 D 80 mCi Radiation Profile A 12 Source Encapsulation A 13 ...

Page 9: ......

Page 10: ... B 5 APPENDIX C MAINTENANCE TROUBLESHOOTING Troubleshooting C 2 Leak Testing C 5 Battery Charging C 6 Replacement Parts C 7 Returning the Gauge for Service C 9 APPENDIX D TRANSPORTATION SHIPPING U S Shipping Requirements D 2 Canadian Shipping Requirements D 4 APPENDIX E SPECIAL CALIBRATION SAMPLES Sealed Asphalt Samples E 2 APPENDIX F CALIBRATION FORMS INDEX WARRANTY ...

Page 11: ...Intercept Offset Graph 6 6 Figure 7 Sample Stat Test Printout 7 5 Figure 8 Serial Device Connection 7 14 Figure 9 Diagram of an Atom A 3 Figure 10 Variation of Radioactive Emission A 6 Figure 11 Effect of Distance on Exposure A 9 Figure 12 3241 100 mCi Radiation Profile A 10 Figure 13 3241 300 mCi Radiation Profile A 11 Figure 14 3241 D 80 mCi Radiation Profile A 12 Figure 15 Sealed Asphalt Sample...

Page 12: ...x LIST OF TABLES Table 1 Shift Combinations 6 2 Table 2 Range of Standard Deviation Ratios 7 2 ...

Page 13: ... 1 1 C Ch ha ap pt te er r 1 1 G Ge en ne er ra al l I In nf fo or rm ma at ti io on n This chapter covers the following topics and tasks Introduction Gauge parts and accessories Unpacking and inspection Site selection ...

Page 14: ... Model 3241 Series gauges meet or exceed all the requirements of ASTM D 4125 10 Standard Test Method for the Asphalt Content of Bituminous Mixtures by the Nuclear Method Owners are encouraged to require study of this manual by operator s before allowing any use of the instrument While no radiation hazard exists for operator s during normal use a potential hazard doesexist if improperly used The se...

Page 15: ...Model 3241 Series 1 3 Control Unit Sample Chamber Sample Pans 4 Control Unit Chamber Interface Cable Figure 1 Gauge Parts ...

Page 16: ...he system The console contains the keypad display and the microprocessor used to process the sample data Sample Chamber contains the radioactive source the detectors and the high voltage electronics used for measuring the asphalt content of the sample Sample Pans 4 used to hold an exact amount of asphalt for testing Four pans are supplied with the gauge Control Unit Chamber Interface Cable connect...

Page 17: ...ter or computer Lift the gauge from the case and inspect the outside surface for damage Check the lock on the sample chamber Make sure the keys fit the lock Return the gauge to the transport case If the gauge appears to be damaged notify the carrier and your Troxler representative immediately ...

Page 18: ...sampling The background count will account for any external hydrogen sources Chapter 3 Operating the Gauge If the system is moved or objects containing hydrogen and or larger objects are moved near the sample chamber after taking the background count a new background count should betaken Do not stand close to the sample chamber due to possible measurement effects and radiation safety The line volt...

Page 19: ...Model 3241 Series 2 1 C Ch ha ap pt te er r 2 2 T Th he eo or ry y o of f O Op pe er ra at ti io on n This chapter covers the following topics and tasks Operating principles ...

Page 20: ... moisture can be related to hydrogen content since both contain hydrogen In all 3241 configurations the fast neutrons emitted are thermalized slowed by the hydrogen in the asphalt The Helium 3 detectors located in the gauge detect the slowed neutrons since helium 3 detectors are insensitive to fast neutrons The thermalized neutrons are counted over time and this count is proportional to the asphal...

Page 21: ...es 3 1 C Ch ha ap pt te er r 3 3 O Op pe er ra at ti in ng g t th he e G Ga au ug ge e This chapter covers the following topics and tasks First time setup Taking background counts Preparing samples Taking measurements ...

Page 22: ...he e G Ga au ug ge e O On n Figure 2 shows all 3241 connections Connect the sample chamber to the control unit with the main interface cable Connect the power adapter to the control unit and a 120 VAC outlet Figure 2 3241 Connections ...

Page 23: ...t or y Turn the gauge on by pressing ON After the RAM test the gauge will enter the 120 second Self Test In this mode the version number and customer name are displayed After the test the display will be The second line displays the time and date The third line displays the count time The last line displays the current enabled calibration ...

Page 24: ...ese parameters usually do not require changing and include the count time time date and company name Setting the Count Time Press TIME for the display To accept the displayed count time press ENTER To change the displayed count time press YES Make the selection by pressing the number that corresponds to your selection The display will return to the Ready mode NOTE The longer the count time the bet...

Page 25: ... be To select this feature press 4 The Time Date function is a restricted function and requires an access code for operation This is to ensure that the time and date are not changed by unauthorized personnel Input the access code and press ENTER The display will be To accept the displayed date press NO To change the date press YES Select the format to be used dd mm yy or mm dd yy Input the new dat...

Page 26: ...cial menu The display willbe Scroll through the menu options by pressing YES twice Select Customer Name by pressing 7 To change the customer name press YES The Customer Name function is a restricted function and requires an access code for operation This is to ensure that the name message is not changed by unauthorized personnel Input the access code and press ENTER The display will be To scroll u...

Page 27: ... of large hydrogen content e g draining a water bath moving large containers of liquids Take a new background count if changes occur or are suspected During and after a background count the test samples should not be within 1 meter 3 feet of the sample chamber The neutron source used in the gauge is Americium 241 Beryllium and has a half life of 432 years or will undergo a natural decay of 0 2 per...

Page 28: ...aterial with a press or hammer 3 Continue adding hot asphalt in layers settling and tamping each layer until the pan is full and the asphalt is above the pan top The asphalt sample should be level with the top of the pan so place a piece of wax paper over the asphalt and press down on the sample with a wooden board or other flat object 4 Remove the wax paper and place the full sample pan on the sc...

Page 29: ...used Place the asphalt sample into the test chamber and close the door If the Pan Weight Display function is enabled the gauge will request the weight of the empty sample pan and the weight of the pan containing asphalt see page 7 16 Enable the appropriate mix calibration by pressing CALIB Press START to begin the measurement sequence The display will be Input the recorded empty sample pan weight ...

Page 30: ...XX Ti m e xx sec Press START for the display The gauge will count down as the asphalt content measurement is obtained After the count time has elapsed the results will be displayed For storing results refer to Chapter 5 ...

Page 31: ...Model 3241 Series 4 1 C Ch ha ap pt te er r 4 4 C Ca al li ib br ra at ti io on ns s This chapter covers the following topics and tasks Preparing calibration samples Performing calibrations ...

Page 32: ...apable of heating to 177 C 350 F Two 76 x 30 x 6 cm 30 x 12 x 2 5 in stainless steel utility pans 2 41 cm 16 in stainless steel mixing bowls Steel straightedge approximately 20 cm 8 in long Plywood or metal plate having an area slightly larger than the sample pans Thermometer with temperature range of 10 to 260 C 50 to 500 F Assorted spoons spatulas heat resistant gloves etc Suggested Equipment Th...

Page 33: ...2 Obtain a sample of the liquid asphalt bitumen being used in the mixture For each calibration sample obtain atleast 1 4 kg 3 lbs Refer to AASHTO Method T168 3 Blend the aggregate s in the proper proportions or obtain blended aggregate samples The aggregate should be maintained at the proposed plant temperature or placed in anovenandbakedfor3hoursat121 C 250 F toremove any moisture 4 Select an emp...

Page 34: ...e Blank Sample Pan 10 Place the filled sample pan on the balance or electronicscale and record the weight 11 Subtract the weight of the empty pan to obtain the weight of the aggregate only 12 Place the aggregate only sample back in the oven and reheat to the proposed plant temperature 13 Measure this sample using a 16 minute count time Record this count on the calibration form see Appendix F ...

Page 35: ...ed by mixing a known weight of hot dry aggregate with a known weight of hot liquid asphalt The number of calibration samples is optional and may vary from two to twelve with twelve providing the best accuracy Calibration samples should be prepared with the asphalt content above and below the design content Example If the Design Mix is 5 5 asphalt content and five calibration samples are to be used...

Page 36: ... asphalt plant If the mix is not representative the gauge readings will not accurately reflect the actual asphalt content All mixing tools should be kept hot to prevent moisturefrom contaminating the mixture and to make mixing easier Placing the mixing bowl on a hot plate will aid inmixing Form a crater in the hot aggregate Slowly pour the hot asphalt into the crater and mix until the aggregate is...

Page 37: ... 5 Put hot dry aggregate see Mixing Tips above into the preheated mixing bowl Use the same type of aggregate as in the blank sample Record the weight on line C 6 Add lines B and C and enter the subtotal on line D 7 Use the Method 1 or Method 2 formula on the previous page to calculate the total design weight Use the method that duplicates the asphalt plant method Enter the weight on line E 8 Slowl...

Page 38: ...egate line C D Mixing Bowl Dry Aggr Weight line D F Total Actual Weight line F G Actual Asphalt Content For Method 2 use the following formula where C Weight of Dry Aggregate line C D Mixing Bowl Dry Aggr Weight line D F Total Actual Weight line F G Actual Asphalt Content ...

Page 39: ...endix F to record the values 1 Weigh the empty sample pan and enter the value on lineH 2 Write the sample number and pan weight on the pan 3 Enter the weight of the blank sample line 3 on line J 4 Add lines H and J and enter the total on line K 5 Write the actual AC line G on line L 6 Place the preheated sample pan on a table and fill about 1 3 full see Filling Tips 7 Settle the asphalt mixture by...

Page 40: ...ration can be performed for the design mixture This procedure refers to the calibration forms in Appendix F To access the Calibration function press CALIB For a new calibration press 3 To manually enter calibration data press 1 This option is commonly used to re enter previously accumulated calibration data To perform a new calibration press 2 The gauge will prompt for a new background count Press...

Page 41: ... from line G Press ENTER Place the first calibration sample in the sample chamber and press START Record the counts on line M Repeat the above procedure for each sample After all samples have been measured the display will be The gauge calculates the calibration curve and curve fit The fit coefficient is any number between 0 0 and 1 0 with 1 0 being a perfect fit After calculation of the fit coeff...

Page 42: ... s xxxx Di f f x xxx AC Pr ess YES The gauge proceeds to the calibration storage display To view the data on the screen press 1 To scroll through the displays press YES Record the coefficients on the form in Appendix F Press YES Continue to view the remaining samples by pressing YES NOTE Diff is the difference between the actual AC entered and the AC calculated from the calibration curve ...

Page 43: ...ER To store the calibration press YES Input a calibration number This number will be used to recall the calibration later Press ENTER Input the asphalt mixture number and press ENTER The calibration will be stored and the gauge will return to the Ready mode Cal i br at i on Act i vat ed W ant t o st or e Cal i br at i on ...

Page 44: ... the data press YES After viewing all the calibration data the gauge returns to the Ready mode To scroll through the calibration numbers press 1 If the calibration number shown on the display is not correct press 1 or 2 to scroll through the list of calibrations To select calibration for review press 3 The gauge displays the data and returns to the Ready mode Cal i b xxxx 1 Revi ew Cal i b 2 St or...

Page 45: ...he calibration number is known press 2 and enter the number The gauge will indicate the activation and return to the Ready mode To view the list of calibrations press 1 Scroll through the calibration numbers by pressing 1 or 2 Select the calibration number displayed by pressing 3 Cal i b xxxx 1 Revi ew Cal i b 2 St or ed Cal i b 3 NewCal i b Revi ew Cal i b 1 Vi ew Cal i bs 2 Known Cal i b 3 Exi t...

Page 46: ...bration feature press CALIB To enter calibration constants press 3 Press 1 The gauge displays Input all information requested by the gauge Cal i b xxxx 1 Revi ew Cal i b 2 St or ed Cal i b 3 NewCal i b Sel ect sour ce f or NewCal i b 1 Keypad i nput 2 Gauge der i ved Bl ank sam pl e Net W T _____g I nput and Pr ess ENTER ...

Page 47: ...3241 Series 5 1 C Ch ha ap pt te er r 5 5 P Pr ro oj je ec ct ts s This chapter covers the following topics and tasks Using the Project function Storing measurements Printing measurement data Erasing projects ...

Page 48: ...ownloading to a computer The Project function allows projects to be created and viewed Create a New Project Press SHIFT and 4 for the Project display Press 3 for the display Input a project number up to 12 numbers and press ENTER After a brief delay the display will be The gauge will return to the Ready mode PR xxxxx 1 Vi ew Pr oj s 2 Known Pr oj 3 NewPr oj Pr oj ect Num ber _________ I nput and P...

Page 49: ... through the list of projects press 1 or 2 To select the project for viewing press 3 To display the first data stored under the project number press 1 To display the most recent data stored under the project press 2 To exit to the Ready mode press 3 PR xxxxx 1 Vi ew Pr oj s 2 Known Pr oj 3 NewPr oj PR xxxxx 1 Scr ol l Up 2 Scr ol l Down 3 Sel ect Pr oj PR xxxxx 1 Fi r st Sam pl e 2 Last Sam pl e 3...

Page 50: ...the datamay be stored under a project number for recalling and printing later Press STORE The display will be Input a sample number up to 6 numbers and press ENTER The asphalt sample datawill be stored under the current project and sample number Sam pl e Num ber _______ I nput and Pr es ENTER ...

Page 51: ...re is not available or Windows Vista or 7 Press PRINT The display will be Press 1 The display will be Connect the printer to the serial port located on the back of the console refer to page 7 14 for information on setting the baud rate and the location of the serial port To print all projects press 2 To select a single project press 1 The display is Scroll through the project numbers by pressing 1...

Page 52: ...o the Ready mode Erase a single project by pressing 1 To view the project list press 1 The gauge displays Scroll through the project list by pressing 1 or 2 Press 3 to select the project to erase To erase the project press SHIFT and YES at the prompt The gauge returns to the Ready mode Accidental Erasure If data is accidentally erased press SHIFT and 9 for the Special menu Press 3 to select Recove...

Page 53: ...Model 3241 Series 6 1 C Ch ha ap pt te er r 6 6 S Sh hi if ft t F Fu un nc ct ti io on ns s This chapter covers the following topics and tasks Using the functions enabled with the SHIFT key ...

Page 54: ...ns SHIFT FUNCTION 0 PREP Allows the entry of the calibration values see Chapter 4 1 RECALL Retrieves the results of the last reading 2 PRECISION 3 CALC Activates the calculator function 4 PROJECT Enables project functions see Chapter 5 5 AUTO Automatically store or print data 6 ERASE Erases measurement and calibration data 7 STATUS View gauge settings without accessing the individual functions sep...

Page 55: ...tion allows you to view each setting without accessing the individual function Press SHIFT and 7 for the Status display To view settings press YES at each subsequent screen Exit by pressing NO CE Cont r ol St at us Pr ess YES t o vi ewseet i ngs CE t o exi t ...

Page 56: ...lope Offset If the asphalt source changes and recalibration is not possible a slope offset can be performed Figure 4 This offset uses a selected calibration and a new offset sample of known AC to recalculate the slope of the calibration curve A slope offset will produce accurate results if the unknown samples are within 0 5 AC of the offset sample Relative Offset AC Shift This offset can be used t...

Page 57: ...Model 3241 Series 6 5 Figure 4 Sample Slope Offset Graph Figure 5 Example Relative Offset Graph ...

Page 58: ...6 6 Figure 6 Example Slope Intercept Offset Graph ...

Page 59: ...mples were used for the original calibration NOTE An original 2 point calibration can also be performed using the two offset samples Press SHIFT and 8 for the Offset display Exit by pressing 3 If the calibration number is known press 2 To perform the offset select the type of offset and follow the gauge prompts To scroll through the calibrations stored in memory press 1 The display is To view the ...

Page 60: ... count A sample number will be assigned to the reading and will increment by one up to 99 after each reading The Auto Print function configures the gauge to automatically print the results of sample readings after each measurement NOTE The Auto Store and Auto Print functions are independent of each other One function can be on while the other is off Press SHIFT and 5 for the display To change the ...

Page 61: ...nd press SHIFT and YES at the erase prompt The gauge will return to the Ready screen To scroll through the list of calibrations stored in the gauge press 1 View the calibrations by pressing 1 or 2 To select the calibration press 3 To erase the calibration at the prompt press SHIFT and YES Sel ect t o ERASE 1 one Pr oj ect 2 al l Pr oj ect s 3 one Cal i b ERASE CALI B 1 Vi ew Cal i bs 2 Known Cal i...

Page 62: ...adjusted The maximum time allowed under this function is 60 minutes and is rounded to the nearest 15 second interval Press SHIFT and 2 for the Precision display Input the required precision and press ENTER The gauge will request the AC Input the AC and press ENTER The gauge calculates the time required to obtain the requested precision The gauge automatically enables the count time calculated to r...

Page 63: ...nction is active these keys are enabled Press SHIFT and 3 to activate the Calculator function To perform the calculator operation use the x keys located in the lower leftcorner of the keypad The key is located on the START ENTER key Results may be stored in memory by pressing MS Store Retrieve results from memory by pressing MR Print Exit the calculator mode by pressing EXIT Yes CALCULATOR 4 125 3...

Page 64: ...ple weight and prompt the user to addasphalt until the desired weight is reached This information will be entered onto the Calibration Forms found in Appendix F Press SHIFT and 0 for the display For the following example Method 1 Asphalt by Aggregate Dry Weight will be used Press 1 The gauge will request the Asphalt Content Input the AC and press ENTER Input the weight of the scraped clean mixing ...

Page 65: ...est the weight of the sample pan Input the weight of the empty sample pan Press ENTER The gauge will prompt you to add the sample mixture to the pan until the displayed weight is reached Press ENTER The sample is ready for calibration Repeat the above procedure for each sample to be used M i xi ng bowl BLANK aggr egat e xxxxg ENTERwhen r eady Add Asphal t t i l l asph bowl aggr xxxxg Pr ess ENTER ...

Page 66: ...6 14 NOTES ...

Page 67: ...Model 3241 Series 7 1 C Ch ha ap pt te er r 7 7 S Sp pe ec ci ia al l F Fu un nc ct ti io on ns s This chapter covers the following topics and tasks Using the functions in the Special menu ...

Page 68: ...It is very important that the ambient temperature remain the same during the stat test The longer count times however can be used to check long term gauge operation After the 20 counts the gauge calculates the standard deviation This standard deviation is compared to a theoretical standard deviation value Ideally this ratio should be one However the 3241 prescale or divide for one minute counts is...

Page 69: ...e gauge Close the doorand press START After the 20 counts have been completed the gauge will display the average counts and indicate if the test passed or failed The individual count datamay be viewed or printed at this time by pressing YES at the view dataprompt Toreturn to the Ready mode without viewing the data press NO View the databy pressing YES at the view dataprompt Select the method of vi...

Page 70: ...me should be four times the stat test count time The gauge should not be turned off between the stat test and drift test The stat test must be current Press SHIFT and 9 to display the Special menu To access the Drift Test feature press 2 and ENTER for Remove any samples or sample pans from the gauge and press START After completion of the 5 counts the gauge will display the average counts and indi...

Page 71: ...dual count data may be viewed or printed at this time To return to the Ready mode without viewing the results press NO View the data by pressing YES at the prompt A sample print out is shown below Figure 7 Sample Stat Test Printout ...

Page 72: ...will successfully recover the lost data If datahas been stored after an accidental erasure a successful recovery is impossible Press SHIFT and 9 to display the Special menu Access the Recover Erase feature by pressing 9 If the recovery is successful the display will be T Ti im me e D Da at te e Refer to page 3 5 for information on changing the time or date Pr oj ect Num ber xxxxx Dat a Recover ed ...

Page 73: ...ensure more uniform asphalt content measurements among all gauges Calibration transfer also reduces the chance of error produced by the sample preparation techniques preferred by differentoperators The master gauge resides in the central laboratory and is used to perform the different mix calibrations The field gauge resides in the field laboratory and receives the calibration constants from the m...

Page 74: ...If a cross calibration has already been performed go to page 7 14 for information on transferring a calibration The following steps must be performed prior to transferring a calibration from a master gauge to a field gauge Prepare a minimum of five cross calibration samples Refer to Chapter 4 for detailedinstructions on preparing asphalt samples for calibration These samples must be prepared with ...

Page 75: ...umber ofsamples 2 Perform a background count 3 Measure the samples 4 Input master gauge background count 5 Input the five sample counts taken with the master gauge 6 Enter the transfer number This procedure should be repeated for each field gauge Press SHIFT and 9 to display the Special menu To access the Calibration Transfer feature press 9 The display will be Press 1 for Cross Calibration mode C...

Page 76: ...n data collection press 2 This procedure assumes the gauge derived method 1 The gauge will request a background count If the background count is not current or the gauge has been moved press YES Empty the sample chamber andpress START 2 If the background count is acceptable press YES 3 Input the sample AC The display requests the first sample 4 To measure the first sample press START After the mea...

Page 77: ...order as the field counts that were taken above 8 After entering the master gauge sample counts the field gauge will calculate a relational calibration curve used later for transferring calibrations from the master to the field gauge 9 When the calculations are complete the data may be viewed or printed To return to with the cross calibration process without reviewing the data press NO To view the...

Page 78: ... to perform calibrations for different mix designs Calibrations may now be transferred to the field gauges without additional field gauge calibrations Transfer Once a cross calibration has been performed and stored master gauge calibrations may be transferred to the field gauge without the need for a complete field gauge calibration On the Master Gauge Prepare asphalt samples for the particular mi...

Page 79: ...rs press 2 The transfer number displayed on the gauge may be erased by pressing 3 After selecting the correct transfer number input the calibration information from the master gauge into the field gauge Enter the sample weight the background count and calibration constants A1 A2 and A3 Store this calibration When a calibration is stored under the Calibration Transfer mode x is placed after the cal...

Page 80: ...Refer to the device s instruction manual for the proper settings Press SHIFT and 9 to display the Special menu To access the Baud Rate function press 6 for the display Accept the displayed baud rate by pressing NO If the baud rate is incorrect press YES Input the baud rate that matches the printer or computer Figure 8 Serial Device Connection Baud Rat e xxxx W ant t o change Baud Rat e xxxx Sel ec...

Page 81: ...he Special menu To access the Serial Number function press 8 for the display To change the gauge serial number press YES This feature requires an access code to prevent tampering by unauthorized personnel Retrieve the access codefrom your Troxler representative and input the access code Press ENTER Input the new serial number and press ENTER Ser i al Num ber xxxxxxx W ant t o change Ser i al Num b...

Page 82: ...he Pan Weight Display enabled the gauge will request the weight of the empty pan After input of the weight the gauge will instruct you to fill the pan with asphalt until the proper weight is reached Press SHIFT and 9 to display the Special menu To access the Pan Weight Display feature press 9 for the display To enable the pan weight display press YES Di spl ayi ng Sam pl e Pan i s OFF W ant t o Ch...

Page 83: ...ing for anyone who will operate a Model 3241 Series gauge Information covering radiation theory is contained in this appendix along with a brief explanation of radiation statistics and radiation terminology This chapter covers the following topics and tasks Radiation theory terminology and safety Types of radiation How to limit your exposure Radiation profiles ...

Page 84: ... Structure All materials consist of chemical elements that cannot decompose by ordinary chemical methods Some examples are H Hydrogen C Carbon O Oxygen U Uranium Cf Californium Co Cobalt Each element contains an atom with a unique structure The atom consists of smaller particles such as protons neutrons and electrons The protons and neutrons are grouped together in the nucleus The electrons orbit ...

Page 85: ...rry a negative charge and essentially have no mass Mass Atomic Weight Scale Charge Protons 1 0073 1 Neutrons 1 0087 0 Electrons 0 0006 1 Because protons and neutrons are clustered together in the nucleus the mass of an atom is concentrated in the nucleus The atom below has two protons and two neutrons therefore it is a helium atom The atomic weight of an atom is the sum of the protons and neutrons...

Page 86: ...ist but only two concern the Troxler instrument user These units are the curie and the roentgen equivalent man rem The curie defined as the quantity of radioactive material giving 3 7 x 1010 disintegrations per second is equal to the number of disintegrations second of one gram of radium 226 Note that the source used in the 3241 is small with quantities expressed in millicurie mCi or Gigabecquerel...

Page 87: ...d environment to the extent that their exposure to radiation must be monitored Several means of personnel monitoring or dosimetry exist the most common methods are film badges and TLD badges available from Troxler Radiation Statistics Radioactive emission is a random process The number of emissions in a given time period is not constant but varies statistically about an average value The variation...

Page 88: ...e mean the distribution shows that 68 3 of the time the count rate obtained will be within 1 standard deviation of the mean Figure 10 shows the chance of counts falling within three standard deviations A statistical stability test may be performed to compare the experimental standard deviation to the theoretical standard deviation see page 7 2 ...

Page 89: ...ped by the source capsule Only the photon and neutron radiation contribute to the occupational radiation exposure Photon radiation is electromagnetic radiation as are x rays radio waves and visible light Visible light and photons have no mass a zero electrical charge and travel at the speed of light Photons are energetic and penetrating Dense materials provide the best shielding against photon rad...

Page 90: ...ing These methods are a part of an ALARA As Low as Reasonably Achievable program TIME The simplest way to reduce exposure is to keep the time spent around a radioactive source to a minimum If time is cut in half so is the exposure with all other factors remaining constant DISTANCE Distance is another effective means to reduce radiation exposure A formula known as the inverse square law relates the...

Page 91: ... such as alpha particles may be stopped by a single sheet of paper other particles such as neutrons and photons require much more shielding Materials containing large amounts of hydrogen such as polyethylene are used to shield neutrons Dense materials such as lead are used to shield photons The Model 3241 Series gauges have shielding built into the system which reduces the exposure 3ft 2ft 1ft 1 a...

Page 92: ... 1 4 1 55 0 1 0 1 RADIATION PROFILE FOR 3241 IN PLASTIC CASE 100 mCi LOCATION SURFACE 10 cm 30 cm 1 Meter Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total FRONT 0 3 1 4 1 7 0 1 0 4 0 5 0 1 0 1 BACK 0 3 1 2 1 5 0 1 0 4 0 5 0 1 0 1 LF SIDE 0 3 0 3 0 1 0 1 RT SIDE 0 3 1 2 1 5 0 4 0 4 0 1 0 1 TOP 0 9 1 6 2 5 0 1 0 6 0 7 0 1 0 1 BOTTOM 0 2 1 1 1 3 0 3 0 3 0 1 0 1 Figure 1...

Page 93: ... 0 0 3 4 0 4 3 0 5 0 5 RADIATION PROFILE FOR 3241 IN PLASTIC TRANSPORT CASE 300 mCi LOCATION SURFACE 10 cm 30 cm 1 Meter Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total FRONT 1 2 4 0 5 2 0 4 1 1 1 5 0 4 0 4 BACK 0 9 6 0 6 9 0 2 1 2 1 4 0 3 0 3 LF SIDE 0 1 1 0 1 1 0 5 0 5 0 2 0 2 RT SIDE 0 6 5 0 5 6 0 2 1 2 1 4 0 3 0 3 TOP 2 0 6 0 8 0 0 3 1 8 2 1 0 1 0 4 0 5 BOTTOM 0...

Page 94: ... RADIATION PROFILE FOR 3241 D IN PLASTIC TRANSPORT CASE 80mCi LOCATION SURFACE 10 cm 30 cm 1 Meter Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total FRONT 0 1 1 2 1 3 0 8 0 8 0 1 0 1 BACK 0 1 0 8 0 9 0 1 0 6 0 7 0 1 0 1 LF SIDE 0 6 0 6 0 2 0 2 0 1 0 1 RT SIDE 0 1 1 0 1 1 0 4 0 4 0 1 0 1 TOP 0 4 1 6 2 0 1 1 0 1 1 0 1 0 1 BOTTOM 0 1 1 0 1 1 0 8 0 8 0 1 0 1 Figure 14 324...

Page 95: ...radiation safety requirements The neutron source Americium 241 Beryllium is compressed and welded inside stainless steel capsules The only radiological health concerns to Troxler instrument users are the photon and neutron emissions for asphalt content measurement Proper use of this instrument following the instructions in this manual and the shielding design of the instrument will keep the exposu...

Page 96: ...Appendix A 14 NOTES ...

Page 97: ...1 A Ap pp pe en nd di ix x B B S Sp pe ec ci if fi ic ca at ti io on ns s This chapter covers the following topics and tasks Measurement Specifications Radiological Specifications Electrical Specifications Mechanical specifications ...

Page 98: ...in 16 Min 0 100 0 050 0 035 0 025 100 mCiAmericium 241 Beryllium 1 Min 4 Min 8 Min 16 Min 0 084 0 042 0 029 0 021 300 mCiAmericium 241 Beryllium 1 Min 4 Min 8 Min 16 Min 0 070 0 035 0 025 0 018 NOTES Range of control mix 0 to 14 asphalt Gauge precision is calculated using the ASTM precision equation Where Slope slope of the calibration curve at a given AC Count gauge count at a given AC ...

Page 99: ... 2 96 0 42 GBq 80 11 3 mCi Am 241 Be or 3 7 0 37 GBq 100 10 mCi Am 241 Be or 11 1 1 11 GBq 300 30 mCi Am 241 Be Source Type Sealed Source Special Form Source Housing Stainless Steel Double Encapsulated Shielding Polyethylene and Lead Surface Dose Rate See Radiation Profiles pages A 10 through A 12 Shipping Case DOT 7A Type A ...

Page 100: ... 0 2 watts average RAM 8 kbytes non volatile ROM 64 kbytes Max Test Data Storage 99 files Max Calibration Storage 64 files Serial Data Format 8 Data Bits 2 Stop Bits No Parity Gauge to PC Compatible Computer Cable PN 104334 1000 Gauge to WEIGH TRONIX Printer Cable PN 104324 1000 Gnd pin 1 Tx pin 2 CTS pin 5 Gnd pin 1 Rx pin 2 DSR pin 6 DSR pin 6 CTS pin 5 Gnd pin 7 Gnd pin 7 Gnd pin 1 Gnd pin 1 Tx...

Page 101: ...35 lbs Shipping Weight 31 9 kg 70 lbs Operating Temperature ambient 10 to 70 C 14 to 158 F Sample Temperature maximum 177 C 350 F Chamber Temperature maximum 77 C 170 F Vibration Test 2 54 mm 0 1 in at 12 5 Hz Drop Test 300 mm onto 25 mm steel ball This gauge contains sensitive electronic components and radioactive materials This gauge must not be subjected to stress abuse or operation other than ...

Page 102: ...Appendix B 6 NOTES ...

Page 103: ...p pp pe en nd di ix x C C M Ma ai in nt te en na an nc ce e T Tr ro ou ub bl le es sh ho oo ot ti in ng g This chapter covers the following topics and tasks Troubleshooting Leak testing Replacement parts Returning the gauge for service ...

Page 104: ...nge high voltage module with good module The high voltage module is located on the baseboard The electrical connection between the sample chamber and the control unit may not be good Check the cable with an ohm meter Perform gauge initialization Gauge Does Not Turn On With an ohm meter check the fuse inside the control unit Ensure AC adapter is supplying at least 12VDC Check wall outlet for 120 VA...

Page 105: ...e is unstable or drifts replace the High Voltage Module with a good module Enable the factory calibration in the problem gauge and in a good gauge if available Measure a sample in both gauges and compare the result The Asphalt Content AC readings should be similar if the gauge is functioning properly If only one gauge is available place a sealed sample in the gauge Recall the calibration curve tha...

Page 106: ...s recheck the calibrationparameters and samples Gauge will not Communicate with Printer Check the cable for continuity Check baud rates Check cable pin out see page B 4 Make sure all other parameters match o Data bits 8 o Stop bits 2 o Parity none o Protocol DSR DTR Software is not Functioning Properly Re initialize the gauge Contact customer service ...

Page 107: ...R to order a leak test kit Each individual who leaktests the gauge is required to wear appropriate personnel monitoring during this duty Using the Troxler leak test kit and accompanying instructions perform the following procedure 1 Write the date and gauge model and serial numbers on the form and on the wipe folder 2 Open the sample chamber door and locate the round indentation on the inside top ...

Page 108: ...ng g If your gauge is equipped with rechargeable batteries the batteries should be charged as often as possible Unlike other gauges that use Ni Cad batteries the 3241 batteries require continuous charging NOTE Do not use alkaline batteries in the Model 3241 ...

Page 109: ... Base 104544 3241 Overlay keypad 012158 Latch Corbin door lock 104523 Latch Strike 012104 Foam Grip 3241 for handle 100101 0100 Knob with Shaft for handle 105327 He3 Tube Assembly 104095 900 VDC Helium Detector 105950 Assembly CPU Board 3241X 106797 3241 Baseboard Assembly 105244 High Voltage PCB Assembly 016210 0025 Fuse 3AG Amp Normal Blow 104620 Smartwatch w 8Kx8RAM 104588 Temperature Sensor As...

Page 110: ...Asphalt Content 021140 Radiation sign kit 102868 3880 Leak test kit w 4 Packets 102876 0005 Leak Test Packet 4 replacement 102873 1 oz solution detergent 104340 Printer Weigh tronix 104324 1000 Cable Weigh tronix Printer to Gauge M M 104334 1000 Cable PC to Gauge FEM MAL 109661 Survey Meter ...

Page 111: ...serial number if applicable Is the gauge still under warranty Problem or difficulty you are having with the instrument Shipment method to Troxler and for returnshipment Shipping and billing address not P O Box street address and ZIP code Telephone number and contact for questionsfrom Troxler Will estimate be required before performing any work on the gauge Payment method credit card account number...

Page 112: ...Appendix C 10 NOTES ...

Page 113: ... Appendix D 1 A Ap pp pe en nd di ix x D D T Tr ra an ns sp po or rt ta at ti io on n S Sh hi ip pp pi in ng g This chapter covers the following topics and tasks U S Shipping Requirements Canadian Shipping Requirements ...

Page 114: ... on the Troxler website at www troxlerlabs com A copy of the results of the TYPE A package testing must be on file Hazmat employee training records must be kept on file An Emergency Response Information document must be in the vehicle and immediately accessible to the driver A properly completed Bill of Lading must be in the vehicle and immediately accessible to the driver The shipping papers must...

Page 115: ...ing unloading and temporary storage in which fire breakage spillage or suspected contamination occurs involving shipment of radioactive materials Hazmat Training The U S DOT regulations require every hazmat employer to train test certify and maintain records for each hazmat employee Hazmat training applies to anyone who transports or prepares for transport radioactive materials per 49 CFR 172 subp...

Page 116: ...ging of Radioactive Materials Regulations TPRM apply any time a nuclear device used in commerce is transported by any means in Canada For training and accident notification requirements consult the Transportation of Dangerous Goods Regulations For further information on transporting a nuclear device contact the transportation section of the Canadian Nuclear Safety Commission CNSC ...

Page 117: ...eries Appendix E 1 A Ap pp pe en nd di ix x E E S Sp pe ec ci ia al l C Ca al li ib br ra at ti io on n S Sa am mp pl le es s This chapter covers the following topics and tasks Preparing special calibration samples ...

Page 118: ...p Refer to Chapter 4 for preparing calibration samples 2 Apply a bead of siliconized acrylic latex caulk around the edge of the asphalt sample pan 3 Place the 0 032 in 1 mm aluminum cover plate down on top of the caulking Gently press down to seal thesample 4 Spread a bead of caulk around the edge of the pan on top of the plate 5 Inspect the sample and seal any visible gaps cracks orholes ...

Page 119: ...Model 3241 Series Appendix E 3 Figure 15 Sealed Asphalt Sample ...

Page 120: ...Appendix E 4 NOTES ...

Page 121: ...Model 3241 Series Appendix F 1 A Ap pp pe en nd di ix x F F C Ca al li ib br ra at ti io on n F Fo or rm ms s This chapter covers the following topics and tasks Calibration sample preparation forms ...

Page 122: ...Appendix F 2 ...

Page 123: ...Model 3241 Series Appendix F 3 ...

Page 124: ...Appendix F 4 Figure 16 Calibration Data Sheet ...

Page 125: ...ucture A 2 Auto Print 6 8 Auto Store 6 8 Background count 3 7 Batteries C 6 Baud Rate 7 14 Becquerel A 4 Calculator 6 11 Calibration Cross Calibration 7 8 Equipment 4 2 Forms F 1 Manually entering data 4 16 Offset 6 4 Performing 4 10 Reviewing 4 14 Sample mixing 4 5 4 6 Sample preparation 4 3 6 12 Transfer 7 7 Charging Batteries C 6 Computer 5 5 Count time 3 4 Cross Calibration 7 8 Curie A 4 Custo...

Page 126: ... 6 6 9 Recover 7 6 Gauge weight B 5 High voltage B 7 Hydrogen 2 2 Incorrect readings C 4 Interface Computer B 4 Printer B 4 Leak testing A 5 mCi A 4 Measurement Incorrect C 4 Sample preparation 3 8 Specifications B 2 Store 5 4 Taking 3 9 Mechanical specifications B 5 Memory B 4 Number maximum Calibration files B 4 Test data files B 4 ...

Page 127: ...3 Replacement C 7 Print function 5 5 Printer optional 1 4 C 7 Project function 5 2 Quantity source A 3 Rad A 4 Radiation Safety A 7 Statistics A 5 Terminology A 4 Theory A 2 A 4 Types A 7 Radiation Profile 100 mCi A 10 300 mCi A 11 80 mCi A 12 Radiological specifications A 3 RAM B 4 Recall function 6 10 Recover erase 7 6 Rem A 4 Replacement parts C 7 Requirements shipping D 2 ROM B 4 ...

Page 128: ...ng gauge B 9 Set up gauge 3 4 Shift functions 6 2 Shipping Requirements D 2 Shipping forms D 9 Site selection 1 6 Size gauge B 5 Software C 4 Source A 3 Encapsulation A 13 Source activity A 3 Special functions 7 1 Specifications Electrical B 4 Measurement B 2 Mechanical B 5 Radiological B 3 Standards AASHTO 4 3 ASTM 1 2 Stat test 7 2 Status function 6 3 Store function 5 4 ...

Page 129: ...re operating B 5 Theory operational 2 2 Time Changing 3 5 Count 3 4 Time Date 3 5 TLD A 5 Training Hazmat A 3 Nuclear Gauge Safety 1 2 A 2 Transfer calibration 7 7 Troubleshooting C 2 Unpacking and inspection 1 4 Upload Data to a Computer 5 5 Weight gauge B 5 ...

Page 130: ...ual or other written and signed agreement THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF AND THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED AND TROXLER NEITHER ASSUMES NOR AUTHORIZES ANYONE TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OF THE INSTRUMENT THIS WARRANTY SHALL NOT APPLY TO THE INSTRUMENT OR ANY PART TH...

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