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Fluke 875 manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    Victoreen ® 875 High Range Containment Monitor Operators Manual February 2005 Manual No. 877-1-1 Rev. 9 © 2004, 2005 Fluke Corporat i on, All rights reserved . Printed in U .S.A. All product names are trademar ks of their respective companies[...]

  • Page 2

    Fluke Biomedical Radiation Management Services 6045 Cochran Road Cleveland, Ohio 44139 440.498.2564 120 Andrews Road Hicksville, New York 1180 1 516.870.0100 www.flukebiomedical.com/rms[...]

  • Page 3

    i Table of Contents Section 1: Introductio n ................................................................................................ 1-1 1.1 General De scription ..................................................................................... 1-1 1.2 Specific ations .....................................................................[...]

  • Page 4

    ii Appendix A: Calibration and Test Procedures .............................................................. A-1 A.1 Calibration Procedures ................................................................................ A-1 A.2 Test Proc edures .......................................................................................... A-1 Appendix[...]

  • Page 5

    Introduction General Description 1 1-1 Section 1 Introduction 1.1 General Description Containment Monitor 875 The 875 Containment Monitor has been qualified for use in Nuclear Safety related applications. Qualification Test Reports, 950.301, 950.308A, and 950.310A define the parameters that have been verified by test and are available for purchase.[...]

  • Page 6

    Victoreen 875 Operators Manual 1-2 Hermetic Integrity 1E10-5 cm 3 of helium per second @ one standard atmosphere Chamber Fill Gas Nitrogen/helium (2%) at at mospheric pressure Dimensions (W x H x D) with Mounting Bracket 9.25 x 12.5 x 10.06 in (234.95 x 317.5 x 255.52 m m) Weight Approximately 18 lb (8.17 kg ) Temperature, Storage 40° to 160°F (4[...]

  • Page 7

    Introduction Specifications 1 1-3 Relative Humidity (Storage) : 0 to 95% (non- condensatio n) Relative Humidity (Operating) : 0 to 90% (non- condensatio n) Irradiation: 3.5 to 1 x 10 3 Rads @ 60°C integrate d over 40 years life. Mounting 876-1-55, Rack Chassis Available Options (consult factory) 876A-100 : Readout, for use with digital systems Out[...]

  • Page 8

    Victoreen 875 Operators Manual 1-4 Pull Box Assembly (878-12-5) The 878-12-5 Pull Box Assembly is desi gned to allow for thermal expansion of the detector cables and to provide a service loop. Various optional pull-bo x configurations are avail able per Table 1-1. For more information refer to Section 2, Appendix B, and Appen dix C. Table 1-1. Pull[...]

  • Page 9

    Introduction Equipment Overview 1 1-5 Figure 1-1. High-Range Containment Monitor 87 5[...]

  • Page 10

    Victoreen 875 Operators Manual 1-6 Figure 1-2. Typical Energy Respon se Curve – Detector 877-1[...]

  • Page 11

    Introduction Equipment Overview 1 1-7 Figure 1-3. Typical Linearity Detector 877 -1 Figure 1-4. Radiation Input vs. Meter Reading (Cal culated Curve)[...]

  • Page 12

    Victoreen 875 Operators Manual 1-8 Figure 1-5. High-Range Detector, Recommended Installation 1.4 Receiving Inspection Upon receipt of the unit: 1. Inspect the carton(s) and contents for damage. If damage i s evident, file a claim with the carrier and notify Fluke Biomedical, Radiation Manageme nt Services at 440.248.9300. 2. Remove the contents fro[...]

  • Page 13

    Introduction Storage 1 1-9 1.5 Storage Storage of Victoreen instruments must compl y with level B storage requirements as outlined in ANSI N45.2.2 (1972) Section 6.1.2(.2). Th e storage area s hall comply with ANSI N45.2.2 (1972) Section 6.2 Storage Area, paragraphs 6.2.1 throu gh 6.2.5. Hous ekeeping shall confo rm to ANSI N45.2.3 (1972). Level B [...]

  • Page 14

    Victoreen 875 Operators Manual (Blank page)[...]

  • Page 15

    Installation Installation 2 2-1 Section 2 Installation 2.1 Installation Installation of the monitoring system consist s of se lecting suitable mounting site s for each component of the system, mounting each of the component s, and connecting the components into the syste m configuration. Installation of this system is as follows: Refer to the appli[...]

  • Page 16

    Victoreen 875 Operators Manual 2-2 Under potential L.O.C.A. conditions of pressure and temperature, the cable may expand as much as 11 inches per 100 feet. The distance from the pull box to the det ector will be determined by the amount of flex hose used to seal the detector cables. Additional information is found in t he paragraph below Cable Seal[...]

  • Page 17

    Installation Installation 2 2-3 done until cable is pulled and tested. (Refer to t he procedu re Cable-877, in Appendix B, for more information.) Minimum bend radius of the 878-1-9 cable is four inches. When bending conduit or flex hose, take this into consideration. Typical bend radius for P/N 878-12-30 is ¾ inch; stainless steel flex house is 12[...]

  • Page 18

    Victoreen 875 Operators Manual 2-4 Thickness 0.015 inch (0.38 mm) nominal Outer Diameter 0.217 inch (5.51 mm) nominal Impedance 75 ohms nominal Capacitance 22 pf/ft nominal Ancillary Wiring Ancillary wiring for computer, reco rder, power and alarm c ontacts are installed ac cording to drawing GE L 875-1 and Table 2-1 which indicates connector pin d[...]

  • Page 19

    Operation Operation 3 3-1 Section 3 Operation 3.1 Operation Once installation is completed, operation is fully automatic. The 87 6A-1 Readout Module co ntinuously indicates the level of radioactivity measured at t he detector site. When the radiation level excee ds an alarm set point, an alarm is actuated. The following steps explain how to ope rat[...]

  • Page 20

    Victoreen 875 Operators Manual 3-2 alarm level. Return the module to its proper posi tion in the rack. Ti ghten the rear holding screws. Tighten the knurled holding kno b on the front. Return the module to service. During normal operation, the radi ati on field is usually less than 1 R/h (the lower li mit of detection of the high range detector) an[...]

  • Page 21

    Function Description Functional Description 4 4-1 Section 4 Function Description 4.1 Functional Description High-Range Containment Monitor Detector 877-1 The high-range containme nt monitor detector is an io n chambe r detector that has the appeara nce of a six-inch diameter dom ed cylinder about seven inch es long, mounted on an L shaped b racket.[...]

  • Page 22

    Victoreen 875 Operators Manual 4-2 Preamplifier I Meter Printed Circuit Board (P/N 876A-1-86, Schematic 876A-1-3E) The detector current, measuring from 7 x 10 - 11 to 7 x 10 -4 amperes respectively, at the bottom and top of the reading range, enters the reado ut on rear panel connector J1. From the rea r panel, the ion chamber current enters the pr[...]

  • Page 23

    Function Description Readout Module876A-1 4 4-3 High Voltage Power Supply Normal Operation (non-ECS Test) The multivibrator circuit of Q7 and Q8 also suppli e s the input to the high voltage generator. Two of the transistors of U1 act as buf fers between the multiv ibrator and the high volta ge circuit. Q4 and Q3 serve an output driving stage for t[...]

  • Page 24

    Victoreen 875 Operators Manual 4-4 Preamplifier I Meter Board Power Supply (P/N 876-1-86, Schematic 876-1-3E) A +6.2 V power supply contained on the pre amplifier me ter board has as its input the +15 V from the power supply board. Integr ated circuit U401, pins 12, 13, and 14 is a voltage re gulator with diode U402 providing a stable refere nce vo[...]

  • Page 25

    Function Description Readout Module876A-1 4 4-5 There is a yellow ALERT ALARM jumper connecte d to the collector (pin 1) of the alert alarm relay driver stage of U503. The following options are avail able with the presence or absen ce of the jumper when the radiation level exceeds the threshold and triggers the alarm: Manual Reset - The alarm will [...]

  • Page 26

    Victoreen 875 Operators Manual 4-6 The pen clamp circuit is a clamping circui t consisting of U501, pins 8, 9 and 10 an d diode CR502. It prevents pin 9 from going negative. The purp ose of this is to prevent the recorder pen from being jammed against the baseline. Electronic Check Source (ECS) Printed Circuit Board (P/N 876A-1-92, Schematic 876A-1[...]

  • Page 27

    Function Description Readout Module876A-1 4 4-7 During the ECS test, all alarms are muted; that is, their operation is disabled until the completion of the test. During this six-second period there is no warning of a high radiation condition. If this situation is not tolerable, two containment monitors must be installed. Action of Green Safe/Reset [...]

  • Page 28

    Victoreen 875 Operators Manual 4-8 high voltage ramp. The overall circuit that monitors the ECS test also includes U2 , described with the power supplies; and the S AFE/FAIL circuit on the relay driver printed circuit boa rd. Ultimately, by the action of R218, the charge in tegration adjustment potent iomet er (CHARGE I NTEG. ADJ.), charging capaci[...]

  • Page 29

    Function Description Readout Module876A-1 4 4-9 Safe/Reset Sub-circuits The three sub-circuits described be low are all involved in the opera tion of the green SAFE/RESET lamp and its associated alarm: 1. A latch for the SAFE/RESET lamp built around four NOR ci rcuits of integrated circuit U202, with several auxili ary elements. 2. A threshold dete[...]

  • Page 30

    Victoreen 875 Operators Manual (Blank page)[...]

  • Page 31

    Maintenance, Calibration, and Troubleshooting Maintenance 5 5-1 Section 5 Maintenance, Calibration, and Troubleshooting 5.1 Maintenance The monitor is designed to operate for long periods in the containment witho ut attention. The following replacement schedule should ke ep the monitor in trouble-free operation. Every five years - Replace the 4200 [...]

  • Page 32

    Victoreen 875 Operators Manual 5-2 Table 5-1. Recommended Test Equipment Current Generator - Test Electrometer Range 1 x 10 -12 Amps to 1 x 10 -3 Amps Accuracy, Current Gene rator 10 -12 Amps ± 10% 10 -11 Amps ± 3% 10 -10 to 10 -7 Amps ± 2% 10 -7 to 10 -3 Amps ± 0.2% Accuracy Test Electrometer ± 0.2% ± 1 digit with integration time long enoug[...]

  • Page 33

    Maintenance, Calibration, and Troubleshooting Troubleshooting 5 5-3 5.3 Troubleshooting The 875 High-Range Containme nt Monitor is safety-related equipment. The monitor h as been assembled by techniques and with parts selected for the reli ability required in a nuclear application. An y repairs made to the detector or readout (other than replacemen[...]

  • Page 34

    Victoreen 875 Operators Manual 5-4 5.4 Power Supply Measurements (P/N 876-1-89 Schematic 876-1-3C) Turn the 876A-1 on by turning the function switch to the ALL positi on. Allow all equipment, including the readout module, to warm up for at least 60 minutes before attempting any calibration. Adjust the mechanical zero of the panel meter (use mi rror[...]

  • Page 35

    Maintenance, Calibration, and Troubleshooting Signal Input Circuit 5 5-5 TP501 +5 V -2.8 V TP502 -1.5 V +6.3 V These voltages are approx imate and actual values may differ somewhat. Any marked departure s from these values is an indicatio n of a malfunction. 5.6 Metering Circuit (P/N 876A-1-3E, Schematic 876A-1-92) The signal circuit that drives th[...]

  • Page 36

    Victoreen 875 Operators Manual 5-6 *Normal here signifies a small radiation signal so that the voltage at TP502 is close to zero volts. Both of the solenoids of the alert and high alarm circuits must operate for the CHANNEL TEST lamp to light. The lighting of the CHANNEL TEST lamp does not of itself show that the r emote alarm contacts have closed [...]

  • Page 37

    Maintenance, Calibration, and Troubleshooting Muting Stages of the Alarm Circuits 5 5-7 Conversely, during the ECS Test muting is definitel y wanted, and the +1 2 V on pin 9 can easily overcome the +2 V on pin 10. 5.10 ESC Board (P/N 876A-1-92, Schematic 876A-1-3D) The wave-shapes shown in Figure 5-1 should be suff icient for localization of malfun[...]

  • Page 38

    Victoreen 875 Operators Manual 5-8 U PIN 204 1 205 6 205 3 205 1 206 7 203 10 207 6 207 9 CONN 5 206 10 CONN 1 0203 1 208 13 201 8 208 3 202 10 Figure 5-1. Wave Shapes on the Electronic Check Source Board[...]

  • Page 39

    Maintenance, Calibration, and Troubleshooting Overall Fail Circuitry Associated with the ECS Test 5 5-9 5.11 Overall Fail Circuitry Associated with the ECS Test Because the ECS Test involves circuits on the switch printed circuit board, power supply p rinted circuit board and relay driver p rinted circuit board, as well a s those on the ECS printed[...]

  • Page 40

    Victoreen 875 Operators Manual 5-10 2. An auxiliary pulse from pin 3 of U208 to the automat ic pulse generating circuits resets them so that an automatically generated pulse will be presen t 17.1 minutes later if the ECS Test is not conducted manually durin g that time. The purpose of this pulse is to insure continued o peration of automatic testin[...]

  • Page 41

    Maintenance, Calibration, and Troubleshooting Operation of Latch Circuit 5 5-11 U202, pins 1, 5, L (Enable pulse active; i.e. low) From these conditions, the following mu st hold true. Pin Comment 4 Depends on 6 3 Depends on 2 Further analysis is contain ed in the truth table (Table 5-2). Figure 5-2. Latch Circuit Table 5-1. Truth Table for Pass an[...]

  • Page 42

    Victoreen 875 Operators Manual 5-12 8 L Connected to 4 12 L 10 H Since U202, (8, 9, 10) is NOR 11 H Because 12 and 13 are L 12 H Result: Output switches from Low to High This is the original condition. No change takes place. Notes: 1) Enable pulse assum ed present, so 1 and 5 are L. 2) Initial condition assum es 12 and 10 L. The truth table shows t[...]

  • Page 43

    Appendix Calibration and Test Procedures A A-1 Appendix A Calibration and Test Procedures A.1 Calibration Procedures Document Number De scription CAL877-1 High Range Dete ctor 877-1 Calibration REPORT 877 Calibration of Model 877 to 3.0 MeV The calibration and data listed above is f or reference only and need not be performe d. A.2 Test Procedures [...]

  • Page 44

    Victoreen 875 Operators Manual (Blank Page)[...]

  • Page 45

    Appendix Cable and Pull Box Proc edures B B-1 Appendix B Cable and Pull Box Procedures B.1 Cable and Pull Box Procedures Document Number De scription CABLE-877 HRCM Cable Termination and Installation Procedure 878-12-3 High-Range Containme nt Monitor Pull Box Cover Installation Procedure[...]

  • Page 46

    Victoreen 875 Operators Manual (Blank page)[...]

  • Page 47

    Appendix Applicable Drawings and Bill of Materials C C-1 Appendix C Applicable Drawings and Bill of Materials C.1 Applicable Drawings Document Number Descripti on GEL876-1-55 Rack Chassis & Recom mended Seismic Mtg. GEL876A-1 Readout Module Dimen sional Outline GEL875-1 Interconnection Diagram High-Ran ge Containment Monitor GEL-877-1 High-Rang[...]

  • Page 48

    Victoreen 875 Operators Manual C-2 876-1-3G Schematic, PC Board 876A-1-40 Front Panel Assembly 876A-1-41 Meter Assembly 876A-1-3H Schematic (Block Diagram.) Final Assem bly 92-9015-A AC Line Filter 877-1-5 Detector Assembly 877-1-81 Containment Area Detector Assembly 877 -1-80 Detector Mounting Flange Assembly 877-1-17 Wall Mounting Bracket 878-1-5[...]

  • Page 49

    Appendix Applicable Bill of Materials C C-3 C.2 Applicable Bill of Materials Document Number Descripti on 875-1 876A-1 Readout with 877-1 Detector 876A-1 High-Range Containment Monitor Read out 876-1-55 Ra ck Chassis 876A-1-108 High-Range Containment Monitor Readout Assembly 876A-1-Kit Mating Connector Kit for 876A-1-108 876A-1-86 Preamp Meter PC B[...]

  • Page 50

    C-4 Fluke Biomedical Radiation Management Services 6045 Cochran Road Cleveland, Ohio 44139 440.498.2564 120 Andrews Road Hicksville, New York 1180 1 516.870.0100 www.flukebiomedical.com/rms[...]