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TSA Systems BM-286A Operating And Service Manual

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WASTE MONITOR
MODEL BM-286A
OPERATING AND SERVICE MANUAL
Version 1.00z
December 20, 2004

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  • Page 1 WASTE MONITOR MODEL BM-286A OPERATING AND SERVICE MANUAL Version 1.00z December 20, 2004...

  • Page 2: Table Of Contents

    4. THEORY OF OPERATION... 28 4.1. UNIT OPERATION... 28 4.2. COMPONENTS... 28 5. MAINTENANCE ... 33 5.1. OPERATOR MAINTENANCE ... 33 5.2. CALIBRATION... 33 5.3. DISCRIMINATOR ADJUSTMENT... 36 5.4. WEIGHT CALIBRATION ... 37 5.5. CALIBRATION CHECK-LIST ... 38 BM-286A TABLE OF CONTENTS...
  • Page 3 B. GLOSSARY ... 43 C. FORMULAS ... 45 C.1. ACTIVITY FROM COUNTS ... 45 C.2. EFFICIENCY ... 45 C.3. N*SIGMA ALARM LEVEL ... 45 C.4. RELIABLE DETECTABLE ACTIVITY (RDA) FORMULA... 46 C.5. SIGNAL TO BACKGROUND RATIO... 46 C.6. VARIANCE... 47 D.

  • Page 4: Introduction

    The BM-286A displays the total activity, scaled to appropriate units (µCi, nCi, etc.) and specific activity in pCi/gram. These units are also included in reports and data sample information that are created by the unit.

  • Page 5: Specifications

    May be repaired to the board/subassembly level in the field Dimensions: Overall: 75" h x 44" w x 44" d (191 x 100 x 110cm) Internal Cavity: 12" h x 12" w x 12" d (30 x 30 x 30cm) 1. INTRODUCTION page 2 (55 liters) Model BM-286A...
  • Page 6 32 to 100˚ F (0 to 40˚C) operating; 0 to 120˚ F storage Humidity: 0 to 95% Relative Humidity (non-condensing) Accessories: (included with system) VGA color monitor, 101 key keyboard Components: (optional) Printer, NaI(Tl) detector and 1,024 channel MCA for spectral isotopic identification 1. INTRODUCTION page 3 Model BM-286A...
  • Page 7 1. INTRODUCTION page 4 Model BM-286A...

  • Page 8: Inspection And Installation

    The following procedures should allow on-site personnel to correctly install and set up the BM-286A for normal operation. Follow the procedures in the order given. It is recommended that a copy of the Initial Installation Checklist (section 3.7.) be filled out after initial installation and whenever the BM-286A is put into service after prolonged storage.

  • Page 9: Installation

    The power cord located on the left side of the unit plugs into a standard 115 volt, 60 Hz ac receptacle. When the instrument is installed at its operating location, the set-up and operating procedures should be performed as described in General Overview (section 3.1.). Model BM-286A...

  • Page 10: Operating Instructions

    The set-up mode is password protected, with two levels of user access provided. Both level 0 and level 1 operators have access to the normal operation of the BM-286A. Operators with level 0 (administrative) access may change operating parameters and change discriminator settings.

  • Page 11: Power-Up And Self-Tests

    3. OPERATING INSTRUCTIONS page 8 3.2. POWER-UP AND SELF-TESTS The main power switch is located on the left hand side of the BM-286A. When the instrument is turned on the computer performs a Power-On Self-Test (POST) which checks and initializes the system hardware.

  • Page 12: Access Menu

    Tare scale prompts the operator to verify that the chamber is empty, and press the OK button to tare the scale. 3. OPERATING INSTRUCTIONS page 9 ACCESS MENU Level Zero Access (password protected) Set-up menu Utilities Set-up waste streams Model BM-286A...
  • Page 13 Set-Up allows the system’s operating parameters to be examined or changed. Utilities: The utilities function provides access to diagnostics, user setup and shut down utilities. Details of these functions are provided in the appropriate sections of this manual. 3. OPERATING INSTRUCTIONS page 10 Model BM-286A...

  • Page 14: Normal Operation

    Note that all detector windows turn gray while the door is open. The monitor will read the scale when the door is closed. If no weight (<5 lb) is detected in the chamber, the monitor will return to background update mode. 3. OPERATING INSTRUCTIONS page 11 Model BM-286A...
  • Page 15 If the activity measured is less than the alarm threshold: The clear window at the top of the screen will turn blue and a scan result box will appear with the user-programmed alarm message in yellow letters on a blue background. 3. OPERATING INSTRUCTIONS page 12 Model BM-286A...

  • Page 16: Programming The System

    Setting up waste streams involves setting the parameters for the individual waste I.D.s. These parameters are detailed in Set-Up Waste Streams (section 3.4.2.). When a large amount of data is to be entered we suggest you use the external keyboard. Model BM-286A...
  • Page 17 Background time, in seconds. Enter a value between 20 and 10,000. Background Method: Two methods of background count are incorporated in the BM-286A. They are selectable from the Set-Up Menu. The Rolling background method is the standard for TSA products. For a count time of N seconds, the count is updated every N/10 seconds, and the sum of the last 10 count periods are averaged to determine the current background.
  • Page 18 Reports: This menu parameter enables writing a report to disk. The choice is from three options: ALL, ALARM, or NONE. Refer to Reports (section 3.6.) for details. 3. OPERATING INSTRUCTIONS page 15 Model BM-286A...
  • Page 19 If this entry is set to 1 - 19, the operator will only be able to use the waste stream selected by the system administrator. NOTE: This is a global entry that applies to all operators. 3. OPERATING INSTRUCTIONS page 16 Model BM-286A...
  • Page 20 = background in counts/second consig = confidence sigma (fixed at 1.65Õ or 95%) fasig = false alarm sigma (fixed at 2.33Õ or 1/100) alev = alarm level in cps/efficiency efficiency = waste stream efficiency 3.
  • Page 21 NOTE: The minimum count time calculation is disabled if N*Sigma alarm type is selected. If N*Sigma alarm type is selected in conjunction with a "0" count time, the count time will automatically be set to 30 seconds. Count Display: Selects the method used for displaying counts on the screen and in the reports.
  • Page 22 Maximum Weight: Enter a maximum allowable weight, in pounds. This is used to determine if the item to be scanned is within the waste stream weight limits. 3. OPERATING INSTRUCTIONS page 19 Model BM-286A...
  • Page 23 This value is used in calculating the activity. This value may be either entered manually or automatically calculated by the BM-286A. Press on the white box and enter a value, or press "auto" to allow the unit to calculate the efficiency.
  • Page 24 This value is used only when the Alarm Type is set to DPM. 2. N*Sigma: Radiation alarm level in N*Sigma (N*1background + background). This is the count level that will generate a radiation alarm when N*Sigma alarm type is selected. NOTE: This value is used only when the Alarm Type is set to N*Sigma.

  • Page 25: Diagnostics And Utilities

    This tool allows the operator to reset the scale controller if a problem is suspected. This process will take approximately 30 seconds and a message will be displayed during the operation. 3. OPERATING INSTRUCTIONS page 22 UTILITIES MENU Variance Scale Reset Detector Efficiency Check Operator Set-up Shut Down Model BM-286A...
  • Page 26 This window provides us with a troubleshooting tool as well as a way to adjust the upper and lower level discriminators. Refer to Discriminator Adjustment (section 5.3.) for detailed instructions. The detector counts and scale weight are displayed and updated every two seconds. 3. OPERATING INSTRUCTIONS page 23 Model BM-286A...

  • Page 27: Reports

    Alarms will generate a report only for samples that are found to be above the alarm level. All: All causes a report to be generated and stored on disk every time a scan is completed. 3. OPERATING INSTRUCTIONS page 24 Model BM-286A...

  • Page 28: Initial Installation Checklist

    Bottom: _________ Total: __________ Discriminator Settings: LLD: ___________ 3. OPERATING INSTRUCTIONS page 25 Activity; __________nCi Date of latest assay: __________ Top: __________ Back: __________ Top: __________ Back: __________ ULD: __________ Model BM-286A Left: __________ Door: __________ Left: __________ Door: __________...
  • Page 29 3. OPERATING INSTRUCTIONS page 26 __________ seconds [ ] Rolling [ ] Standard __________ seconds __________ __________ counts/second __________ counts/second __________ pounds [ ] Lbs [ ] Kg [ ] All [ ] Alarms [ ] None __________ __________ Model BM-286A...

  • Page 30: Waste Stream Set-Up Worksheet

    3. OPERATING INSTRUCTIONS page 27 ____________________ seconds or "0" for minimum ____________________ pounds ____________________ % ____________________ [ ] DPM [ ] N*Sigma [ ] pCi/g ____________________ seconds or "0" for minimum ____________________ pounds ____________________ % ____________________ [ ] DPM [ ] N*Sigma [ ] pCi/g...

  • Page 31: Theory Of Operation

    4. THEORY OF OPERATION The BM-286A system is a self-contained Bag/Box monitor, operated by two personal computers. 4.1. UNIT OPERATION The main computer operates in Windows NT, with a touch screen, color LCD display to monitor system operation. The system can be used with an external keyboard for operator input, and a printer to generate reports, or labels.
  • Page 32 4.2.2. Computers and Power Supply: Refer to "BM-286A Wiring Diagram" Drawing 3 and"BM-286A Electronics Component Designator" Drawing 4. (Appendix F.). There are two computers, one a DOS base unit with a TSA circuit card (CIF-553) and the second a Windows NT machine. Communication between them is handled by RS-232 via COM1 on both machines.
  • Page 33 (U10). These pulses are sent to a differential line transmitter (U2) and on to the line receivers on the CIF-553 Computer Interface board, which plugs into the ISA bus in the computer. Model BM-286A...
  • Page 34 • The counters are used for the radiation detectors, motor encoders, etc. • The ports are used for system control and discriminator setting. • Port "C" has 4 differential line drivers and line receivers. • The Address of the card is 1000. 4. THEORY OF OPERATION page 31 Model BM-286A...
  • Page 35 The controller is located on top of the board rack system and displays the current weight in pounds. This unit receives its power from the solid state relay controlled by the RECV-1 board and DOS computer. The NT machine sends and receives serial ASCII data from the unit via COM3. Model BM-286A...

  • Page 36: Maintenance

    DVM with 10MÛ input impedance Oscilloscope with >20 MHz bandwidth Test Source (5-12 µCi of Remove the right side face plate to gain access to the RCS boards. Refer to"BM-286A Pictorial View (Door Open)" Drawing 2 (Appendix F.). 5. MAINTENANCE page 33...
  • Page 37 1,400 volts, or 14 volts at this test point. WARNING: Exceeding 14 volts at TP17 could cause permanent damage to the photo-multiplier tube. 5. MAINTENANCE page 34 Model BM-286A...
  • Page 38 Drawing 20 (Appendix F.). However there should be a noticeable increase in the display intensity for those pulses having amplitudes of 4.5 volts or less relative to those of greater amplitudes. If this is not readily apparent, try adjusting the scope intensity control. 5. MAINTENANCE page 35 Model BM-286A...

  • Page 39: Discriminator Adjustment

    The unit will also acquire a new background when leaving the Utilities Menu. Always run a variance after adjusting the levels. NOTE: If either level is changed you must always 45 keV recalculate all waste stream efficiencies. 1.5 MeV Model BM-286A 5. MAINTENANCE page 36...

  • Page 40: Weight Calibration

    5. MAINTENANCE page 37 5.4. WEIGHT CALIBRATION The third party scale was calibrated at the factory and should not need calibration. If a problem occurs, contact TSA Systems for assistance. Model BM-286A...

  • Page 41: Calibration Check-List

    Activity: __________ µCi Date of latest assay:__________ Top: __________ Back: __________ Top: __________ Back: __________ Variance time: __________ Top: __________ Back: __________ Model BM-286A 5. MAINTENANCE page 38 Left: __________ Door: __________ Left: __________ Door: __________ Left: __________ Door: __________...

  • Page 42: Troubleshooting

    6. TROUBLESHOOTING page 39 6. TROUBLESHOOTING This guide is designed so that on-site personnel can service the BM-286A and effect necessary minor repairs. It covers procedures and parts down to the board level. Any other problems should be referred to factory authorized service personnel. Unauthorized repair voids warranty.

  • Page 43: Fault Isolation

    If nothing is found during the physical inspection, locate the problem area in the following paragraphs, and isolate the defective assembly using the appropriate procedure. NOTE: Always turn the power off when connecting or disconnecting components or cables. After repairing the system, perform a calibration as outlined in Calibration (section 5.2.). Model BM-286A...

  • Page 44: Computers

    Channel boards (RCS-110) may be substituted with system power on, but the power must be turned off before changing the discriminator cards (RCS-120). This will ensure that the discriminator settings are updated. NOTE: If channel cards are replaced permanently, the channels affected must be recalibrated. 6. TROUBLESHOOTING page 41 Model BM-286A...

  • Page 45: Appendix

    Systems is constantly improving and upgrading the product line, TSA can make no guarantee as to the content of current manuals. No obligations are assumed for notice of change or future manufacture of these instruments. Manufactured by TSA SYSTEMS, LTD. 14320 LONGS PEAK COURT LONGMONT, COLORADO 80504 970.535.9949 FAX: 800.508.0083 Model BM-286A...

  • Page 46: Glossary

    Also see ULD. Low Background Alarm/Fault: The condition that occurs if the counts fall below the programmed high background level. This condition prevents further operation until the problem is corrected. Normally set in cps. POST: Power On Self Test Model BM-286A...
  • Page 47 Standard Background: Standard background requires the full background time for the initial background and updates. ULD: The Upper Level Discriminator provides a threshold, usually adjustable, that determines the highest signal level that will be accepted as a nuclear pulse by the system’s electronics. Also see LLD. Model BM-286A...

  • Page 48: Formulas

    C.1. ACTIVITY FROM COUNTS C.2. EFFICIENCY C.3. N*SIGMA ALARM LEVEL This formula calculates the minimum activity, in disintegrations per minute, that can be reliably detected under a given set of operational conditions. APPENDIX C. FORMULAS page 45 Activity = Activity in nCi Eff = Decimal efficiency (i.e.

  • Page 49: Reliable Detectable Activity (Rda) Formula

    CON = confidence sigma CT = count time in seconds E = system efficiency in percent F = false alarm level in cps FA = false alarm sigma G = intermediate variance RDA = reliable detectable activity Q = Quality factor...

  • Page 50: Variance

    APPENDIX C. FORMULAS page 47 R = the quality factor C = each of the individual counts Where: N = number of counts taken R = mean variance I = number of iterations Model BM-286A...

  • Page 51: Configuration Tracking Sheet

    MODIFICATION:____________________________________________________________ ___________________________________________________________________________ INSTALLED BY:________________________________ DATE:__________ MODIFICATION:____________________________________________________________ ___________________________________________________________________________ INSTALLED BY:________________________________ DATE:__________ MODIFICATION:____________________________________________________________ ___________________________________________________________________________ INSTALLED BY:________________________________ DATE:__________ MODIFICATION:____________________________________________________________ ___________________________________________________________________________ INSTALLED BY:________________________________ DATE:__________ MODIFICATION:____________________________________________________________ ___________________________________________________________________________ INSTALLED BY:________________________________ DATE:__________ APPENDIX D. CONFIGURATION TRACKING SHEET page 48 SERIAL NUMBER:________________ DATE RECEIVED:________________ SYSTEM MODIFICATIONS Model BM-286A...

  • Page 52: Parts

    Model number suffixes are generally not included in the text of the manual, however, the suffixes in the PARTS LISTS must be included on orders for spare parts. For Assistance Call: TSA SYSTEMS, LTD. 14320 LONGS PEAK COURT LONGMONT,COLORADO 80504 970.535.9949 FAX: 800.508.0083 Model BM-286A APPENDIX E. PARTS page 49...

  • Page 53: Drawings

    BM-286A Pictorial View (Door Open) ... 2 BM-286A Wiring Diagram ... 3 BM-286A Electronics Component Designator ... 4 BM-286A Rear Computer Hook Up View ... 5 RCS-110 Schematic Diagram ... 6 RCS-110 Component Designator ... 7 RCS-120 Schematic Diagram ... 8 RCS-120 Component Designator ...

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