Troxler 3241 Series Manual Of Operation And Instruction
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Troxler 3241 Series Manual Of Operation And Instruction

Troxler 3241 Series Manual Of Operation And Instruction

Asphalt content gauges
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Manual of Operation and Instruction
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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

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  • Page 1 Manual of Operation and Instruction 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 Troxler products are protected by U.S. and foreign patents. Copyright  1989 - 2011 Troxler Electronic Laboratories, Inc. All Rights Reserved No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including...
  • Page 3 Model 3241 Series...
  • Page 4 Gilchinger Strasse 33 D.82239 1F, Bldg G, No. 1 Guotai North Road Alling nr. Munich, Germany ZJG, China, 215600 Phone: ++ 49.8141.71063 Phone: 0086.512.56793702 Fax: ++49.8141.80731 Fax: 0086.512.56793701 troxler@t-online.de kjin@troxlerlabs.cn To locate an independent, Troxler-authorized service partner near you, call 1.877.TROXLER (1.877.876.9537).
  • Page 5 Congratulations on the purchase of the Troxler Model 3241 Series Asphalt Content 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.
  • Page 6 CONVENTIONS USED IN THIS MANUAL Throughout this manual the following symbols and special formatting are used to reveal the purpose of the text. WARNING Warnings indicate conditions or procedures that, if not followed correctly, may cause personal injury. CAUTION Cautions indicate conditions or procedures that, if not followed correctly, may cause equipment damage.

  • Page 7: Table Of Contents

    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 Data ................5-5 Erasing a Project ....................5-6 CHAPTER 6: SHIFT FUNCTIONS Model 3241 Series...
  • Page 8 Introduction ......................6-2 Status ........................6-3 Offset ........................6-4 Special ........................6-8 Project ........................6-8 Auto-Store / Auto-Print ..................6-8 Erase.......................... 6-9 Recall ........................6-10 Target Precision ....................6-10 Calculator ......................6-11 Calibration Sample Preparation ..............6-12 CHAPTER 7: SPECIAL FUNCTIONS Stat Test ........................7-2 Drift Test ........................
  • Page 10 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 Model 3241 Series viii...
  • Page 11 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 ...........E-3 Figure 16. Calibration Data Sheet ............F-4 Model 3241 Series...
  • Page 12 LIST OF TABLES Table 1. Shift Combinations ..............6-2 Table 2. Range of Standard Deviation Ratios ....... 7-2...
  • Page 13 This chapter covers the following topics and tasks: Introduction  Gauge parts and accessories  Unpacking and inspection  Site selection  Model 3241 Series...

  • Page 14: Introduction

    The nuclear method of asphalt content testing has been approved by the American Society of Testing and Materials (ASTM) and the Model 3241 Series gauges meet or exceed all the requirements of ASTM D-4125-10, Standard Test Method for the Owners are encouraged to require study of this manual by Asphalt Content of Bituminous Mixtures by the Nuclear Method.

  • Page 15: Figure 1. Gauge Parts

    Control Unit Sample Chamber Sample Pans (4) Control Unit/Chamber Interface Cable Figure 1. Gauge Parts Model 3241 Series...

  • Page 16: Unpacking And Inspection

    Unpacking Upon receipt of the gauge from the factory, perform a complete inspection and inventory. If the shipping case or any other part of the container is damaged contact the shipper immediately. Save the box and any packing material for possible shipment of the gauge to another location or back to the factory.
  • Page 17 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. Model 3241 Series...

  • Page 18: Site Selection

    When choosing a gauge location site, take into consideration the ambient temperature and location of power outlets, large objects and any other nuclear gauges. ♦ Ensure that the room where the gauge is to be located is well ventilated and does not experience abrupt temperature or humidity changes.
  • Page 19 This chapter covers the following topics and tasks: Operating principles  Model 3241 Series...

  • Page 20: Theory

    The Model 3241 Series Asphalt Content Gauges measure the amount of asphalt (bitumen) in a bituminous mixture by determining the hydrogen content of the material. The amount of asphalt and the amount of moisture can be related to hydrogen content since both contain hydrogen.
  • Page 21 This chapter covers the following topics and tasks: First-time setup  Taking background counts  Preparing samples  Taking measurements  Model 3241 Series...

  • Page 22: Turning The Gauge On

    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 Ti m e: x m i nut es Cal i b# Fac t or y The second line displays the time and date. The third line displays the count time. The last line displays the current enabled calibration. Model 3241 Series...
  • Page 24 After unpacking and turning “On” the gauge, several parameters can be initialized. These 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: - COUNT TI M E- x x m i n.
  • Page 25  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 date and press 〈ENTER〉. To change the time, repeat the above procedure. Model 3241 Series...
  • Page 26 Changing the Customer Name The gauge may be programmed to display your name or any other message (not to exceed 16 characters) during the power- up / self-test stage. Press 〈SHIFT〉 and 〈9〉 for the Special menu. The display will be: SPECI AL FUNCTI ON YES- ( next m enu) 01- St at t es t...
  • Page 27 W ant t o t ak e a new Backgr ound? To take a new background count, press 〈YES〉. Prepare the sample chamber as instructed and press 〈START〉. After the count is complete and acceptable, press 〈YES〉. To take another background count, press 〈NO〉. Model 3241 Series...

  • Page 28: Preparing Samples

    NOTE Prior to measuring asphalt content, the gauge must contain a calibration corresponding to the asphalt samples to be tested (see Chapter 4:). The percent (%) asphalt of the test samples must be within the range of the gauge calibration (see the example on page 4-3).

  • Page 29: Taking A Measurement

    Fi l l Sam pl e Pan unt i l wei ght = XXX g. ( Pr es s ENTER) Make sure the unknown % asphalt content sample is the same weight as the calibration samples (±8 g) for the mix being tested. Model 3241 Series...
  • Page 30 Press 〈START〉 for the display: Cal i b# XXX. XX Ti m e: xx s ec . 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. 3-10...
  • Page 31 This chapter covers the following topics and tasks: Preparing calibration samples  Performing calibrations  Model 3241 Series...

  • Page 32: Equipment Needed

    In order to obtain precise asphalt content measurements, use a consistent method of sample preparation. Using the same approved equipment for preparing each sample helps ensure the best possible results. Necessary Equipment The following equipment will be needed during calibration and test sample preparation: ♦...

  • Page 33: Preparing Calibration Samples

    6. Settle the aggregate by dropping the pan about one inch onto a hard surface several times. 7. Smooth the aggregate mixture into the corners of the pan. 8. Fill the rest of the pan with aggregate, overfilling slightly. 9. Scrape off the surface with the straightedge. Model 3241 Series...

  • Page 34: Figure 3. Filling The Blank Sample Pan

    DO NOT COMPACT THE SAMPLE WITH A COMPACTION TOOL! Figure 3. Filling the Blank Sample Pan 10. Place the filled sample pan on the balance or electronic scale and record the weight. 11. Subtract the weight of the empty pan to obtain the weight of the aggregate only.

  • Page 35: Sample Mixing

    % Asphalt by Total Mix Weight Method 1: Method 2: where: A = % Asphalt Content        C = Dry Aggregate Weight D = Weight of Mixing Bowl + Dry Aggregate E = Total Design Weight Model 3241 Series...
  • Page 36 Mixing Tips ♦ Prepare more asphalt than needed! ♦ It is recommended that the aggregate weight of the sample be equal or exceed that of the blank sample to ensure the preparation of slightly more asphalt than needed. ♦ When preparing a calibration mix, the aggregate and asphalt must be representative of the material normally produced by the asphalt plant.
  • Page 37 8. Slowly add hot asphalt to the aggregate until the total design weight is reached. If the actual weight is slightly over or under the design weight, record the value on line F. 9. Calculate the actual %AC (see example below) and enter the value on line G. Model 3241 Series...
  • Page 38 For Method 1, use the following equation: 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 (%) For Method 2, use the following formula: where: C = Weight of Dry Aggregate (line C) ...
  • Page 39 9. Continue adding the mixture in three layers, settling and tamping each layer until the sample pan is full. 10. Place the sample pan on the scales and add or remove material until the weight equals the weight on line K. Model 3241 Series...

  • Page 40: Performing The Calibration

    After preparing all calibration samples, the calibration can be performed for the design mixture. This procedure refers to the calibration forms in Appendix F. To access the Calibration function, press 〈CALIB〉. Cal i b# xxx x 1- Rev i ew Cal i b. 2- St or ed Cal i b.
  • Page 41 After calculation of the fit coefficient, the data may be viewed.  To view data, press 〈YES〉 at the above display.  If you do not want to review the data, press 〈NO〉 at the prompt. Model 3241 Series 4-11...
  • Page 42 The gauge proceeds to the calibration storage display. Sel ec t m et hod of v i ewi ng dat a: 1- Sc r een 2- Pr i nt out To view the data on the screen, press 〈1〉. - Revi ew Dat a - W ei ght : xx xx g.
  • Page 43 W hat i s M i x I D? _______ I nput and Pr es s ENTER Input the asphalt mixture number and press 〈ENTER〉. The calibration will be stored and the gauge will return to the Ready mode. Model 3241 Series 4-13...
  • Page 44 Calibrations stored in the gauge may be recalled and viewed later. To begin reviewing stored calibrations, press 〈CALIB〉. Cal i b# xxx x 1- Rev i ew Cal i b. 2- St or ed Cal i b. 3- New Cal i b. To review a calibration, press 〈1〉.

  • Page 45: Enabling A Stored Calibration

    1- Sc r ol l up 2- Sc r ol l down 3- Sel ect Cal i b.  Scroll through the calibration numbers by pressing 〈1〉 or  Select the calibration number displayed by pressing 〈3〉. 〈2〉. Model 3241 Series 4-15...

  • Page 46: Manually Entering Calibration Data

    To access the Calibration feature, press 〈CALIB〉. Cal i b# xxx x 1- Rev i ew Cal i b. 2- St or ed Cal i b. 3- New Cal i b. To enter calibration constants, press 〈3〉. Sel ec t s our ce f or New Cal i b.
  • Page 47 This chapter covers the following topics and tasks: Using the Project function  Storing measurements  Printing measurement data  Erasing projects  Model 3241 Series...

  • Page 48: The Project Function

    Data is stored in the gauge under a project number. When a project is active, all readings are stored under this project number. This feature allows data retrieval and printing or downloading to a computer. The Project function allows projects to be created and viewed. Create a New Project Press 〈SHIFT〉...
  • Page 49  To display the first data stored under the project number, 3- Ex i t press 〈1〉.  To display the most recent data stored under the project, press 〈2〉.  To exit to the Ready mode, press 〈3〉. Model 3241 Series...

  • Page 50: Storing A Measurement

    After taking a measurement the data may be stored under a project number for recalling and printing later. Press 〈STORE〉. The display will be: Sam pl e Num ber ? _______ I nput and Pr es ENTER Input a sample number (up to 6 numbers) and press 〈ENTER〉. The asphalt sample data will be stored under the current project and sample number.

  • Page 51: Printing Measurement Data

    Pr i nt Pr oj ect 1- Vi ew Pr oj s. 2- Known Pr oj . 3- Ex i t  Scroll through the project numbers by pressing 〈1〉.  To input a known project number, press 〈2〉. Model 3241 Series...

  • Page 52: Erasing A Project

    The Erase function allows project data (or a calibration) to be erased or removed from the gauge’s memory. To erase a project from memory, press 〈SHIFT〉 and 〈6〉 for: Sel ec t t o Er ase: 1- one Pr oj ect 2- al l Pr oj ect s 3- one Cal i b.
  • Page 53 This chapter covers the following topics and tasks: Using the functions enabled with the SHIFT key.  Model 3241 Series...

  • Page 54: Introduction

    This chapter gives brief explanations of the Shift functions available on the Model 3241 Series gauges. Functions are displayed on the numeric keys of the keyboard and are accessed by pressing 〈SHIFT〉 and the corresponding function key. Table 1describes the function for each combination.

  • Page 55: Status

    - Cont r ol St at us- Pr ess YES t o v i ew s eet i ngs ( CE t o exi t )  To view settings, press 〈YES〉 at each subsequent screen.  Exit by pressing 〈NO/CE〉. Model 3241 Series...

  • Page 56: Offset

    Perform an offset only as an intermediate measure and if the materials vary slightly. The Model 3241 Series offers three different types of offset adjustments: slope, relative, and slope/intercept. The calibration curve will be adjusted according to the offset selected.

  • Page 57: Figure 4. Sample Slope Offset Graph

    Figure 4. Sample Slope Offset Graph Figure 5. Example Relative Offset Graph Model 3241 Series...

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

    Figure 6. Example Slope/Intercept Offset Graph...
  • Page 59 3- Sel ect Cal i b. To view the calibrations stored in memory, press 〈1〉 and 〈2〉. Select the calibration for offset by pressing 〈3〉. Perform the offset by selecting the method and following the gauge prompts. Model 3241 Series...

  • Page 60: Special

    Refer to Chapter 7: for detailed information on the Special menu. Refer to pages 5-2 through 5-6 to create, view and/or erase a project previously stored in gauge memory. The Auto-Store function allows automatic storage of gauge readings after completion of the count. A sample number will be assigned to the reading and will increment by one (up to 99) after each reading.

  • Page 61: Erase

    2- Sc r ol l Down 3- Sel ect Cal i b. 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〉. Model 3241 Series...

  • Page 62: Recall

    Use the Recall function to view the results of the last reading taken with the gauge. Press 〈SHIFT〉 and 〈1〉 for the Recall display: Cal i b# x xx x Count s = x xxx % AC x xxxx If you require a higher precision, the gauge may be programmed to automatically increase the count time to reach the desired precision.

  • Page 63: Calculator

    The 3241 Series gauges are equipped with a four-function calculator. The function keys are located on the two left rows of the keypad. When the Calculator function is active these keys are enabled. Press 〈SHIFT〉 and 〈3〉 to activate the Calculator function.
  • Page 64 Refer to Chapter 4: for detailed information on preparing calibration samples. The Calibration Sample Prep function allows the entry of the calibration values such as %AC, weight of mixing bowl, weight of aggregate, etc. After prompting for the initial values, the gauge will automatically calculate the sample weight and prompt the user to add asphalt until the desired weight is reached.
  • Page 65 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. Model 3241 Series 6-13...
  • Page 66 NOTES 6-14...
  • Page 67 This chapter covers the following topics and tasks: Using the functions in the Special menu.  Model 3241 Series...

  • Page 68: Stat Test

    Erratic readings or readings that seem to fluctuate may indicate a problem with the gauge. In the event the readings are “suspect” the Stat Test may be executed to validate the normal operation of the gauge. A Stat Test consists of twenty 1-minute counts. Although other count times are available (4, 8 and 16 minutes) they are not recommended, since the temperature correction process is not utilized during a stat test.
  • Page 69 〈YES〉 at the view data prompt. Select the method of viewing the data. If a printout is desired refer to page 7-14 for the location of the serial port and baud rate selection. A sample printout is shown on page 7-5. Model 3241 Series 7-11...

  • Page 70: Drift Test

    Assuming that the stat test has already been performed (and passed) but gauge readings seem to drift between tests, the Drift Test can be performed to check the long-term drift of the gauge. The Drift Test consists of five counts performed approximately 3- 4 hours after completion of a stat test.

  • Page 71: Figure 7. Sample Stat Test Printout

    The individual 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 Model 3241 Series...

  • Page 72: Recover Erase

    In the event that project data is inadvertently erased, the Recover Erase function may recover the lost information. There is no guarantee that this function will successfully recover the lost data. If data has been stored after an accidental erasure, a successful recovery is impossible.

  • Page 73: Calibration Transfer

    If preparing sealed (special) calibration samples (see Appendix E) that span the mix range, these samples may be used to determine the relational curve. For each “field” system, Model 3241 Series...
  • Page 74 measurements of the special samples should be taken with both the “master” and “field” gauges. After the cross calibration is completed, calibrations performed on the “master” gauge can be transferred to the “field” gauges without additional “field” gauge calibrations. This transfer is performed by entering the “master”...
  • Page 75 Cal i b. Tr ans f er : 1- Cr os s Cal i b. 2- Tr ansf er Press 〈1〉 for Cross Calibration mode. How m any s am pl es ( 5- 12) _______ I nput and Pr es s ENTER Model 3241 Series...
  • Page 76 Input the number of asphalt samples (the same number of samples used with the “master” gauge). You have the option of manually entering the count data using the keypad or automatically taking the measurements using the gauge. Fi el d Gauge M easur em ent 1- Key pad i nput 2- Gauge der i ved...
  • Page 77 3- Pr i nout  To return to with the cross calibration process without reviewing the data, press 〈NO〉.  To view the data on the display, press 〈2〉. After reviewing the data, continue by pressing 〈1〉. Model 3241 Series...
  • Page 78  To print the data, press 〈3〉. Continue by pressing 〈1〉. The gauge will request a transfer number. M as t er gauge Tr ans f er Num ber : __________ Pr es s ENTER Input the transfer number (up to 8 numbers). This number can be composed of the gauge serial numbers.
  • Page 79 A1, A2, and A3. Store this calibration. When a calibration is stored under the Calibration Transfer mode, /x is placed after the calibration number. The “field” gauge is now ready to measure the unknown samples of asphalt. Model 3241 Series...

  • Page 80: Baud Rate

    Configuring the Baud Rate allows the gauge to communicate with an RS-232 serial device such as a printer or computer. The baud rate—the communication speed—should be set to match the peripheral device. Refer to the device’s instruction manual for the proper settings. Press 〈SHIFT〉...

  • Page 81: Customer Name

    To change the gauge serial number, press 〈YES〉. This feature requires an access code to prevent tampering by unauthorized personnel. Retrieve the access code from your Troxler representative and input the access code. Press 〈ENTER〉. Ser i al Num ber : ________...

  • Page 82: Pan Weight Display

    The Pan Weight Display function allows you to configure the gauge to display the weight of the sample pan before taking a sample measurement. With the 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.
  • Page 83 This appendix is required reading 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 ...
  • Page 84 A more detailed discussion of radiological theory can be found in the Troxler Nuclear Gauge Safety Training Program manual, provided you have taken the Troxler Nuclear Gauge Safety training course. Visit our website at www.troxlerlabs.com for more information. Atomic Structure All materials consist of chemical elements that cannot decompose by ordinary chemical methods.

  • Page 85: Figure 9. Diagram Of An Atom

    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. Model 3241 Series Appendix A-3...

  • Page 86: Radiation Theory

    0.01 Joules/kg in any medium. In order to take into consideration the effect of various types of radiation on biological tissue, the rem, or more appropriate for Troxler users - the millirem - is used to measure radiation dosage. The unit rem is derived from scaling the radiation absorbed dose (rad) by a quality factor (QF).
  • Page 87 When the mean is greater than 100, the Poisson distribution can be closely approximated by the normal distribution (Figure 12). The normal distribution predicts the probability that any given count rate will fall within a selected region about the mean. Model 3241 Series Appendix A-5...

  • Page 88: Figure 10. Variation Of Radioactive Emission

    Normal Distribution Figure 10. Variation of Radioactive Emission Using the mean of a larger number of counts to approximate the true mean, the distribution shows that 68.3% of the time the count rate obtained will be within ±1 standard deviation of the mean.

  • Page 89: Radiation Safety

    The exposure profiles for the Model 3241 gauge are also included, along with a discussion of the source encapsulation. Types of Radiation The radioactive source in the Model 3241 Series produce three types of radiation: ♦ Alpha Particles ♦ Photons ♦...
  • Page 90 Limiting Exposure Current regulations for both NRC and Agreement States have established a whole body occupational exposure limit of 5,000 millirem per year. Under normal conditions, a full-time gauge operator will receive less than 200 millirem per year. Taking advantage of all available means to limit radiation exposure is always recommended.

  • Page 91: Figure 11. Effect Of Distance On Exposure

    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. Model 3241 Series...

  • Page 92: Figure 12. 3241 (100 Mci) Radiation Profile

    RADIATION PROFILE FOR 3241 GAUGE (100 mCi) SURFACE 10 cm. 30 cm. 1 Meter LOCATION Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total FRONT BACK LF. SIDE RT. SIDE 11.0 BOTTOM 0.15 1.55 RADIATION PROFILE FOR 3241 IN PLASTIC CASE (100 mCi) SURFACE 10 cm.

  • Page 93: Figure 13. 3241 (300 Mci) Radiation Profile

    1. All readings in mrem/h. 2.* indicates reading less than or equal to 0.1 mrem/h. 3. Measurements made with Nuclear Research Corp., Model NP-2 Survey Meter, calibrated March 1989. 4. Dose Rates for 300 mCi Americium-241:Beryllium source. Model 3241 Series Appendix A-11...

  • Page 94: Figure 14. 3241-D (80 Mci) Radiation Profile

    RADIATION PROFILE FOR 3241-D GAUGE (80 mCi) SURFACE 10 cm. 30 cm. 1 Meter LOCATION Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total Gamma Neutron Total FRONT BACK LF. SIDE RT. SIDE BOTTOM RADIATION PROFILE FOR 3241-D IN PLASTIC TRANSPORT CASE (80 mCi) SURFACE 10 cm.

  • Page 95: Source Encapsulation

    The sources in the Model 3241 Series gauges meet regulatory requirements of U.S. and international authorities as “SPECIAL FORM,” or encapsulated, sealed source material. The “sealed” sources are encapsulated to prevent leakage of the radioactive material and meet radiation safety requirements.
  • Page 96 NOTES Appendix A-14...

  • Page 97: Measurement Specifications

    This chapter covers the following topics and tasks: Measurement Specifications  Radiological Specifications  Electrical Specifications  Mechanical specifications  Model 3241 Series Appendix B-1...
  • Page 98 Gauge Precision at 6% ASPHALT (one standard deviation) 80 mCi Americium-241:Beryllium 1 Min. 4 Min. 8 Min. 16 Min. ±0.100% ±0.050% ±0.035% ±0.025% 100 mCi Americium-241:Beryllium 1 Min. 4 Min. 8 Min. 16 Min. ±0.084% ±0.042% ±0.029% ±0.021% 300 mCi Americium-241:Beryllium 1 Min.

  • Page 99: Radiological Specifications

    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 See Radiation Profiles (pages A-10 through A-12) Rate Shipping Case DOT 7A, Type A Model 3241 Series Appendix B-3...
  • Page 100 Time Accuracy and Stability ±0.005% ±0.0002% / °C Power Supply Stability ±0.01% / °C Charge Source 110/220 VAC, 50-60 Hz / 12 VDC Liquid Crystal Display 4 line x 16 character Keypad 22 key sealed membrane Power Consumption 0.2 watts average 8 kbytes non-volatile 64 kbytes Max Test Data Storage...

  • Page 101: Mechanical Specifications

    Drop Test ball This gauge contains sensitive electronic components and radioactive materials. This gauge must not be subjected to stress, abuse or operation other than in accordance with the standard operating procedures listed in this manual. Model 3241 Series Appendix B-5...
  • Page 102 NOTES Appendix B-6...
  • Page 103 & & This chapter covers the following topics and tasks: Troubleshooting  Leak testing  Replacement parts  Returning the gauge for service  Model 3241 Series Appendix C-1...

  • Page 104: Troubleshooting

    If any of the listed problems should arise, follow the procedure under the difficulty heading before contacting service personnel. Gauge Fails Self-Test (He Tube Error) ♦ Make sure the sample chamber is empty! Test will fail if a sample is in the chamber. ♦...
  • Page 105 ♦ If software has recently been updated or the gauge has been re-initialized, the reference voltage may need to be re- entered. Refer to the tag on the back of the gauge. Re-enter the voltage even if the correct voltage is displayed. Model 3241 Series Appendix C-3...
  • Page 106 Gauge Appears to be Unstable ♦ Perform a stability (stat) test (20 - 1 minute counts). Perform a drift test (5 - 4 minute counts). ♦ If the above tests pass, recheck the calibration parameters and samples. Gauge will not Communicate with Printer ♦...

  • Page 107: Leak Testing

    Troxler is approved to perform leak test services. Call 1-877-TROXLER to order a leak test kit. Each individual who leak tests the gauge is required to wear appropriate personnel monitoring during this duty.
  • Page 108 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! Appendix C-6...

  • Page 109: Replacement Parts

    Assembly, CPU Board (3241X) 106797 3241 Baseboard Assembly 105244 High Voltage PCB Assembly 016210.0025 Fuse, 3AG, ¼ Amp, Normal Blow 104620 Smartwatch w/ 8Kx8RAM 104588 Temperature Sensor Assembly 104575 3241 Operator's Manual 012177 Lock with 2 Keys (H-1209) Model 3241 Series Appendix C-7...
  • Page 110 Accessories Part # Description 105446 Cover, Asphalt Pan 012402 Pan Sample for 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...

  • Page 111: Returning The Gauge For Service

    To prevent order duplication, if an order has been placed by telephone, please write “Confirming Order” on any follow-up written requests. Returning a Model 3241 Series gauges will require special handling and shipping procedures found in Appendix D. Shipping forms are available at www.troxlerlabs.com.
  • Page 112 NOTES Appendix C-10...

  • Page 113: U.s. Shipping Requirements

    & & This chapter covers the following topics and tasks: U.S. Shipping Requirements  Canadian Shipping Requirements  Model 3241 Series Appendix D-1...
  • Page 114 A copy of the current IAEA Certificate of Competent Authority Transportation Guide. for each source in the gauge (Special Form Certificate) must be kept on file. Current versions are available on the Troxler website at www.troxlerlabs.com. ♦ A copy of the results of the “TYPE A” package testing must be on file.
  • Page 115 Hazmat training applies to anyone who transports or prepares for transport radioactive materials per 49 CFR 172 subpart H. Refresher training is required every three years. Visit our website at www.troxlerlabs.com for more information about Troxler’s Hazmat Refresher training course. Model 3241 Series Appendix D-3...
  • Page 116 The Transportation of Dangerous Goods Act and Regulations (TDG) and Transport Packaging 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.
  • Page 117 This chapter covers the following topics and tasks: Preparing special calibration samples  Model 3241 Series Appendix E-1...

  • Page 118: Sealed Asphalt Samples

    To prepare sealed asphalt samples follow the procedure below: 1. Fill the sample pan to within 0.25 inches of the top. 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.

  • Page 119: Figure 15. Sealed Asphalt Sample

    Figure 15. Sealed Asphalt Sample Model 3241 Series Appendix E-3...
  • Page 120 NOTES Appendix E-4...
  • Page 121 This chapter covers the following topics and tasks: Calibration sample preparation forms  Model 3241 Series Appendix F-1...
  • Page 122 Appendix F-2...
  • Page 123 Model 3241 Series Appendix F-3...

  • Page 124: Figure 16. Calibration Data Sheet

    Figure 16. Calibration Data Sheet Appendix F-4...
  • Page 125 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 Customer name .................... 3-6 Model 3241 Series Index-5...
  • Page 126 Date, changing ....................3-5 Detectors....................2-2, C-7 Dosimetry .......................A-5 Drift test ......................7-4 Electrical specifications................B-4 Erase Calibration ......................6-9 Project.......................5-6, 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...
  • Page 127 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 Model 3241 Series Index-7...
  • Page 128 Sample Blank ..........................4-3 Calibration ......................4-3 Filling ........................4-9 Mixing......................... 4-5 Preparation ...................... 3-8 Samples Pan........................E-7 Sealed........................E-2 Self-Test Failure ........................C-2 Serial Number function ................7-15 Service Returning gauge ....................B–9 Set-up, gauge....................3-4 Shift functions ....................6-2 Shipping Requirements....................D-2 Shipping forms .....................D-9 Site selection ......................
  • Page 129 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 Model 3241 Series Index-9...
  • Page 130 During the applicable warranty period, TROXLER’s obligation under this warranty shall be limited exclusively to the repair at a TROXLER facility at no charge, except for shipping to and from TROXLER’S plant, of any instrument which may prove defective under normal use and which TROXLER’s examination shall disclose to its...

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