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Sigma BM-286A manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    WASTE MONITOR MODEL BM-286A OPERATING AND SERVICE MANUAL Versio n 1.00z December 20, 2004[...]

  • Page 2

    BM-286A TABLE OF CONTENTS 1. INTRODUCTION ..................................................................................................................... 1 1.1. SCOPE AND PURPOSE OF MANUAL.................................................................... 1 1.2. GENERAL DESCRIPTI ON ...........................................................[...]

  • Page 3

    6. TROUBLESHOOTING ......................................................................................................... 39 6.1. DIAGNOSTIC AIDS ................................................................................................ 39 6.2. FAULT ISOLATION ................................................................................[...]

  • Page 4

    1. INTRODUCTION pag e 1 Model BM-286A 1. INTRODUCTION 1.1. SCOPE AND PURPOSE OF MANUAL This manual is designed to enable operatin g and service personnel to properly operate and ca re for the BM-286A. Si nce applications are necess aril y site-specific, operation procedures ar e given in general terms. Service and rep air are covered to the board l[...]

  • Page 5

    1. INTRODUCTION pag e 2 Model BM-286A 1.3. SPECIFI CATIONS Sensitivity: See graph on page 4 (section 1.3. Specifications). Detectors: Two 12"w x 24"h x 1.5"d (30 x 47 x 3.75cm) plus Four 12"w x 35"h x 1.5"d (30 x 90 x 3.75cm) plastic scintillation detectors coupled to photo-multiplier tubes via light pipes. Total detec[...]

  • Page 6

    1. INTRODUCTION pag e 3 Model BM-286A Weight: Unit ≈ 12,000 lb (5,455kg) with 1.75" lead shielding Sample Weight: 5 to 1,000 pounds (2.3 to 455kg) Environmental: Temperature: 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, [...]

  • Page 7

    1. INTRODUCTION pag e 4 Model BM-286A[...]

  • Page 8

    2. INSPECTION AND INST ALLATION page 5 Model BM-286A 2. INSPECTION AND INSTALLATION The following procedures should allow on-site personnel to corr ectly install and set up the BM-286A for normal operation. Follow the p rocedures in the order given. It is recommended that a copy of the Initial Installation Checklist (section 3.7.) be filled out aft[...]

  • Page 9

    2. INSPECTION AND INST ALLATION page 6 Model BM-286A 2.1.4. Shipping: Before returning the instrument for an y reason, notify TSA Systems of the difficult y encountered, giving the model and serial numbers of the equipment. TSA will furnish specific shipping instructions. 2.2. INSTALLATION The instrument is complete and read y to operate when it is[...]

  • Page 10

    3. OPERATING INST RUCTIONS page 7 Model BM-286A 3. OPERATING INSTRUCTIONS 3.1. GENERAL OVERVIEW When the BM-286A is initially installed at its operating location, the operating parameters must be adjusted to meet the local conditions and testing requirements. Most of the adjustments are accessed via the software set-up mode. A touch screen keyboard[...]

  • Page 11

    3. OPERATING INST RUCTIONS page 8 Model BM-286A 3.2. POWER-UP AND SELF-TESTS The main power switch is located on the left hand side of the BM-286A. W hen the instrument is turned on the computer performs a Power-On Self -Test (POST) which checks and initializes the system hardware. At the end of this test, an audible ’beep ’ is sounded. If the [...]

  • Page 12

    3. OPERATING INST RUCTIONS page 9 Model BM-286A If a background fault condition (either high or low) is detected the detector windows will be displaye d in black text on a magenta back ground. The offending detectors will display either "**HI**" or "**LO**". NOTE: The fault condition must be corrected before ope ration will be a[...]

  • Page 13

    3. OPERATING INST RUCTIONS page 10 Model BM-286A Background Reco rd: Background record is necessar y for future use. User Lo g-On: User log-on is used to log a new user onto the s y stem. A user must be logged on to the system be fore an y sa mples are tested. The new user will be prompted for both name and badge number. Logging on a new user autom[...]

  • Page 14

    3. OPERATING INST RUCTIONS page 11 Model BM-286A Set-Up Waste St reams: Set-Up Waste streams allows the operato r to enter the paramet ers for the various waste streams. 3.3. NORMAL OPERATION An operator must be "logged on" befor e the system can be operated. To lo g on, the operator must have an operator I.D. and bad ge number assigned b[...]

  • Page 15

    3. OPERATING INST RUCTIONS page 12 Model BM-286A If more weight (>5 lb), but less than the progra mmed minimum weight is detecte d, the screen will display "Insufficient Weight". The ope rator must remove the weight from the cha mber and press OK to continue operation. If the weight is "?" the prog rammed minimum weig ht, the[...]

  • Page 16

    3. OPERATING INST RUCTIONS page 13 Model BM-286A The print button can be touched in the scan results box for a print out of the scan dat a. The data includes waste strea m name, date, time, wa ste item I.D., scan me ssage, activity in nCi, specific activity in (nCi/kg), kilogram weight, net counts per second, and user in formation. The screen will [...]

  • Page 17

    3. OPERATING INST RUCTIONS page 14 Model BM-286A 3.4.1. Set-Up Menu: Set-up is used to refer to the pa rameters that are common to all waste ty pes. The menu will look something like this: SET-UP MENU Bkg Time 120 Bkg Method Rolling Low Alarm 0 High Alarm 10000 Var Time 60 Var Trials 3 Units of Weight Lbs Min Weight lbs 10 Reports All BM I.D.: ABCD[...]

  • Page 18

    3. OPERATING INST RUCTIONS page 15 Model BM-286A Low Alarm: Low alarm le vel in CPS, is the point at which the unit will genera te a FAULT condition. Enter a value between 0 and 1,000. Th e counts from each det ector are compared to this value; if the count from an y detector falls below this value the unit will enter a FA ULT mode. High Alarm: Hig[...]

  • Page 19

    3. OPERATING INST RUCTIONS page 16 Model BM-286A Minimum Weight Lbs: The minimum weight in pounds required before a scan ma y be initiated. Enter a value between 5 and 500 pounds. NOTE: This value must be input in pounds regardless of the units of weight selected. BM I.D.: This is the identification for the monitor. This ID will be included in the [...]

  • Page 20

    3. OPERATING INST RUCTIONS page 17 Model BM-286A 3.4.2. Set-Up Waste Streams: The following parameters must be set for ea ch waste stream to be used: WASTE STREAM PARAMETERS Waste I .D. Alarm Message Count Time Clean Message Count Display Maximum Weight MCA Data Efficiency Alarm Type Alarm L evel A detailed descripti on of each paramet er entry fol[...]

  • Page 21

    3. OPERATING INST RUCTIONS page 18 Model BM-286A The actual formula used to determine minimum sc an time is derived from the RDA formula found in Appendix C. Formulas. The specific alarm level uses the initial "quick weight" x 0.9 to determine the alarm leve l used for scan time calculations. This provide s a safety marg in in the calcula[...]

  • Page 22

    3. OPERATING INST RUCTIONS page 19 Model BM-286A Alarm Type: Alarm type selects the method of generatin g a radiation alarm. The available options are: 1. NSIG: ((N*1background) + bac kground) 2. DPM: Disintegrations per minute above back ground 3. SPACT: Specific Activity in pCi/gram Alarm Message: This parameter en tr y is the message tha t will [...]

  • Page 23

    3. OPERATING INST RUCTIONS page 20 Model BM-286A Efficienc y: This parameter entry represents the e fficiency of the detectors, in percent, to the source activity . This value is used in calc ulating the activity. This value may be either entered manually or automatica lly calcula ted by the BM-286A. Press on the white box and enter a value, or pre[...]

  • Page 24

    3. OPERATING INST RUCTIONS page 21 Model BM-286A Alarm Level: The operator will be prompted for the alarm le vel (depending on the alarm type selected above). Enter th e alarm level (above b ackground) in the appropriate units. The previous value will be display ed, and will only be accepted by entering it again, or a new value m ay be entered. 1. [...]

  • Page 25

    3. OPERATING INST RUCTIONS page 22 Model BM-286A 3.5. DIAGNOSTICS AND UTILITIES When the operator presses the utilities button, the operator will be presented with the Utilities Menu. Press the appropriate button from the menu as shown. The functions are as foll ows: 3.5.1. Variance: The Variance p rogram i mplements an al gorithm t o compute the s[...]

  • Page 26

    3. OPERATING INST RUCTIONS page 23 Model BM-286A 3.5.3. Detector Efficienc y Check: The Calculation Set-up box will appear and the operator will be prompted f or a count time (in seconds) and the calibration source a ctivity (in nanocuries). Press BEGIN at whic h time a START button will appear . Press the START button and the unit will then take a[...]

  • Page 27

    3. OPERATING INST RUCTIONS page 24 Model BM-286A 3.6. REPORTS A file called REPORT.DBF is located in the B M286A director y , if the file does not exist it will be create d, and is appended every time a scan is to be rec orded. This file is in a data base format and can be ported over to many different data base s. The information contained in the [...]

  • Page 28

    3. OPERATING INST RUCTIONS page 25 Model BM-286A 3.7. I NITIAL INSTALLATION CHECKLI ST Plastic Detect ors: Background: __________ Counts Test Source: Isotope: __________ Activity; __________nCi Serial No.: __________ Date of latest assa y: __________ No. of Counts: Right: __________ Top: __________ Left: __________ Bottom: _________ Back: _________[...]

  • Page 29

    3. OPERATING INST RUCTIONS page 26 Model BM-286A Set-Up Parameters: Background Time: __________ seconds Background Method: [ ] Rolling [ ] Standard Variance Time: __________ seconds Number of Trials: __________ Low Alarm L evel: __________ counts/second High Alarm Level: __________ counts/seco nd Minimum Weight: __________ pounds Units of Weight: [[...]

  • Page 30

    3. OPERATING INST RUCTIONS page 27 Model BM-286A 3.8. WASTE STREAM SET-UP WORKSHEET BM-286A WASTE STREAM SET-UP WORKSHEET Waste Stream number : _________________________ Waste I.D.: __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ (16 characters max) Count Time: ____________________ seconds or "0" for minimum MCA Data (Optional): [ ] On [ [...]

  • Page 31

    4. THEORY OF O PERATION page 28 Model BM-286A 4. THEORY OF OP ERATION The BM-286A s y stem is a self-cont ained Bag/Box monitor, operated b y two personal computers. 4.1. UNIT OPERATION The main computer operates in W indows NT, with a touch screen, color LCD display to monitor system operation. The s ystem can be used with an external ke yboard fo[...]

  • Page 32

    4. THEORY OF O PERATION page 29 Model BM-286A 4.2.2. Computers and Power Supply: Refer to "BM-286A Wiring Diagram " Drawing 3 and"BM-286A Electroni cs Component Designator" Drawing 4. (Appendix F.). There are two computers, one a DOS base unit with a TSA circuit c ard (CIF-553) and the second a Windows NT machine. Communication [...]

  • Page 33

    4. THEORY OF O PERATION page 30 Model BM-286A 4.2.4. Channel Card, RCS-110: Refer to "RCS-110 Schematic Diagram" Drawin g 6 and "RCS-110 Component Designator" Drawing 7 (Appendix F.). VR1, VR2, and VR3 regulate the ±15 volt power supply voltages to ± 12 volts and +5 volts for use on this card. The card is equipped with a serie[...]

  • Page 34

    4. THEORY OF O PERATION page 31 Model BM-286A 4.2.5. Discriminator Card, RCS-120: Refer to "RCS-120 Schematic Diagram" Drawin g 8 and "RCS-120 Component Designator" Drawing 9 (Appendix F.). The ±15 volt power supply voltages are regulated to ±12 volts and +5 volts used on this card. The card is lined with test points for measu[...]

  • Page 35

    4. THEORY OF O PERATION page 32 Model BM-286A 4.2.7. Receiver Board, RECV-1: Refer to "RECV-1 Schematic Diagram " Drawing15 and "RECV-1 Component Desi gnator" Drawing 16 (Appendix F.). The receiver board is a q uad, differential line rece iver. This board convert s the differential inputs to +5 volt logic outputs. There is a +5 [...]

  • Page 36

    5. MAINTENANCE pag e 33 Model BM-286A 5. MAINTENANCE 5.1. OPERATOR MAINTENANCE The slide tracks on the weight scale platform shou ld be greased monthly. The hinges and door latch do not require lubrication. 5.2. CALIBRATI ON The electronic circuitr y has proven to be very stable over long periods of time. Howeve r, the following calibration should [...]

  • Page 37

    5. MAINTENANCE pag e 34 Model BM-286A 5.2.1. Channel Boards, RCS-110: Refer to "RCS-110 Schematic Diagram" Drawin g 6 and "RCS-110 Component Designator" Drawing 7 (Appendix F.). Oscilloscope set-up: 1 µ sec HORIZONTA LDIV 1 volt VERTICALDI V This procedure must be performed for e ach detector channel in the s ystem for a norm[...]

  • Page 38

    5. MAINTENANCE pag e 35 Model BM-286A Connect the DVM between TP 16(-) and TP17(+). Connect the oscilloscope between TP16(ground) and TP15(input). Place 13 7 Cs source as clo se to the center of the detector unde r test. Refer to Drawing 20 (Ap pendix F.) for an ex ample of a typical pulse profil e. Adjust the oscilloscope controls to provide a sim[...]

  • Page 39

    5. MAINTENANCE pag e 36 Model BM-286A 5.3. DISCRIMINATOR ADJUSTMENT The Upper and Lower Level Discriminators (ULD & LLD) set the maximum and minimum energy levels at which the s ystem accepts counts. The LLD must be set hi gh enough to prevent system noise from being amplified and counted. The DOS machine sets the levels on the RCS-120 discrimi[...]

  • Page 40

    5. MAINTENANCE pag e 37 Model BM-286A 5.4. WEIGHT CALIBRATION The third part y scale was calibrated at the factor y and should not need calibration. If a problem occurs, contact TS A Systems for assistanc e.[...]

  • Page 41

    5. MAINTENANCE pag e 38 Model BM-286A 5.5. CALIBRATI ON C HECK-LIST High Voltage: HHV #1: __________ VDC HHV #2: __________ V DC HHV #3: __________ VDC HHV #4: __________ VDC HHV #5: __________ V DC HHV #6: __________ VDC New Voltage Setting (if adjusted): ____________________ HHV #1: __________ VDC HHV #2: __________ V DC HHV #3: __________ VDC HH[...]

  • Page 42

    6. TROUBLESHOOT ING page 39 Model BM-286A 6. TROUBLESHOOTIN G This guide is designed so that on-site personnel can service the BM-286A and effe ct necessary minor repairs. It covers procedur es and parts down to the board level. A ny other problems should be referred to fact ory authorized service pe rsonnel. Unauthorized repair voids warr anty. 6.[...]

  • Page 43

    6. TROUBLESHOOT ING page 40 Model BM-286A 6.2. FAULT ISOLATION When the program i s executi ng on the NT machin e there are two sm all dar k green boxes in t he lower left hand of the displa y. The top box should flash light green ever y second. This indicates that the DOS machine has sent data to the NT mac hine. The bottom box should flash light [...]

  • Page 44

    6. TROUBLESHOOT ING page 41 Model BM-286A 6.3. COMPUTERS To check the DOS comp uter a VGA monitor can be connected to see if it i s running and the output to the screen will look something like this: (1,235,234,334,123,234,132) The information that is being sent is door position and six detector counts. The RS-232 data to the NT machine can be ex a[...]

  • Page 45

    APPENDIX A. W ARRANTY page 42 Model BM-286A APPENDIX A. WARRANTY STANDARD WARRA NTY FOR TSA SYSTEMS INSTRUMENTS TSA Systems, Ltd., warrants this instrument to be free from defects in wor kmanship and materials for a period of t welve months from the date of shipment, provided that the equipment has been used in a proper manner and not subjected to [...]

  • Page 46

    APPENDIX B. GLOS SARY page 43 Model BM-286A B. GLOSSARY ADC: Analog to Digital Converter, is an inte grated circuit that converts an analo g sig nal into a binary number that can be used b y the microprocessor. CPS or cps : Counts Per Second High Background Alarm/Fault: The condition that occurs if the counts exceed the programmed high background l[...]

  • Page 47

    APPENDIX B. GLOS SARY page 44 Model BM-286A Rolling Background: This is the background accumulation method used in most of TSA’s instruments. Background accumulation is done i n ten separate buffers, each buffe r represents 1/10 of the total background time. As each buffer is filled, the background is updated. This results in a background update [...]

  • Page 48

    APPENDIX C. FOR MULAS page 45 Model BM-286A C. FORMULAS The following formulas are used in various s ystems manufactured b y TSA S ystems, L td. The y are provided to assist in verif ying sy stem operatio n and to give our customers a better understanding of how the systems operate C.1. ACTIVITY FROM COUNTS Activity = Activity in nCi Eff = Decimal [...]

  • Page 49

    APPENDIX C. FOR MULAS page 46 Model BM-286A C.4. RELIABLE DETECTABLE ACTIVITY (RDA) FORMULA This formula calculates the minimum a ctivity , in disintegrations per minute, that ca n be reliably detected under a give n se t of operational c onditions. BKG = total background counts per count time CON = confiden ce sigma CT = count time in seconds E = [...]

  • Page 50

    APPENDIX C. FOR MULAS page 47 Model BM-286A C.6. VARIANCE The variance analyzer mode is used to check whether the counts seen b y the controller are actuall y from the proper distribution. If the distribution approaches normal, the resulting number will approach 0. Any significant deviation from the normal distribution will re sult in a larger numb[...]

  • Page 51

    APPENDIX D. CONF IGURATION TRACKING S HEET page 48 Model BM-286A D. CONFIGURATION TRACKING SHEET TSA MODEL NUMBER:______________ SERIAL NUMBER:________________ SOFTWARE VERSION:_______________ DATE RECEIVED:________________ OPTIONS AND ACCESSORIES:_______________________________________________ SYSTEM MODIF ICATIONS MODIFICATION:___________________[...]

  • Page 52

    APPENDIX E. PART S page 49 Model BM-286A E. PARTS E.1. RECOMMENDED SPARE PARTS A complete list of spar e parts is available by c ontacting TSA Systems, Ltd. E.2. SPARE PARTS ORDERING INFORMATION To facilitate the processing of spare parts orders the following information is required. - Product Number - Product Serial Number - TSA Stock number - Par[...]

  • Page 53

    APPENDIX F. DRAW INGS page 50 Model BM-286A F. DRAWINGS Please reference the dra wings package provided with the instrument to view the following: BM-286A Pictorial View ................................................................................................................ 1 BM-286A Pictorial View (Door Open) ..............................[...]