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Fluke Victoreen 470A Operator's Manual
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Fluke Victoreen 470A Operator's Manual

Fluke Victoreen 470A Operator's Manual

Panoramic survey meter
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Victoreen 470A
Panoramic Survey Meter
Operators Manual
March 2005
Manual No. 470-166-1 Rev. 6
©2004, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies

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Summary of Contents for Fluke Victoreen 470A

  • Page 1 Victoreen 470A Panoramic Survey Meter Operators Manual March 2005 Manual No. 470-166-1 Rev. 6 ©2004, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies...
  • Page 2 Fluke Biomedical Radiation Management Services 6045 Cochran Road Cleveland, Ohio 44139 440.498.2564 www.flukebiomedical.com/rms...

  • Page 3: Table Of Contents

    Table of Contents Section 1: Introduction....................1-1 Product Description ..................1-1 Specifications....................1-1 Procedures, Warnings, and Cautions ............1-3 Section 2: Installation....................2-1 Unpacking....................2-1 Power Requirements ................... 2-1 Precautions....................2-2 Routine Cleaning ..................2-2 Storage ......................2-3 Section 3: Operation....................
  • Page 4 (Blank Page)

  • Page 5: Introduction

    Introduction Production Description Section 1 Introduction 1.1 Product Description The 470A is unparalleled in health physics surveys instrumentation. The latest solid-state IC technology has been utilized to miniaturize circuitry, reduce weight and increase reliability. Accuracy and convenience have also been carefully considered to assure the best possible indication of true radiation exposure.
  • Page 6 Victoreen 470A Operators Manual Energy Response ±15% from 8.0 keV to 300 keV-bare ±10% from 40 keV to 2 MeV-Covered Response Time 8 sec on 3 mR/h range 3 sec on 10 mR/h range 2 sec on 30 mR/h range 1.5 sec on 100 mR/h and 300 mR/h range...

  • Page 7: Procedures, Warnings, And Cautions

    Biomedical. It shall be the owner’s or user’s responsibility to see to it that the procedures described here are meticulously followed, and especially that WARNINGS and CAUTIONS are heeded. Failure on the part of the owner or user in any way to follow the prescribed procedures shall absolve Fluke Biomedical and its agents from any resulting liability.
  • Page 8 Victoreen 470A Operators Manual (Blank page)

  • Page 9: Installation

    Installation Unpacking Section 2 Installation 2.1 Unpacking When unpacking the 470A, check for any in-shipment damage. 2.2 Power Requirements Two 1 ½ volt and four 22 ½ volt batteries are supplied with each instrument. Before installing the batteries be sure the Range Switch is in the OFF position. The “D” cells are installed in the handle by removing the two side retaining screws that permit removal of the cap.

  • Page 10: Precautions

    Figure 2-1. View of instrument with the logo plate removed. (Showing Battery Test Micro Switch, Control, and Coarse Zero Potentiometer) 2.3 Precautions If the ion chamber is broken or contaminated with radioactive material, the chamber must be replaced. Contact Fluke Biomedical for servicing. 2.4 Routine Cleaning CAUTION Do not immerse the 470A Panoramic Survey Meter.

  • Page 11: Storage

    Installation Storage 2.5 Storage In areas where the humidity is exceptionally high, Ion Chamber instruments may become saturated with moisture causing them to fail. To avoid this occurrence, store instruments in a typical dry box with either a 100-watt light bulb or renewable dessiccant packet. Smaller instruments can be stored in polyethylene bags with dessiccant packet.
  • Page 12 Victoreen 470A Operators Manual (Blank page)

  • Page 13: Operation

    Operation Function Section 3 Operation 3.1 Function The 470A is an ionization chamber meter used to detect alpha, beta, gamma and x-ray radiation. It measures total exposure rate from 3 mR/h full scale for gamma and x-ray energies from 8.0 keV to 2 MeV.

  • Page 14: Operating Procedure (Turn-On Sequence)

    Victoreen 470A Operators Manual 3.3 Operating Procedure (Turn-On Sequence) Turn the Range Switch from OFF to BATT and make sure the meter is in the BATT. O.K. green region. Then turn the Range Switch to 1000. Push the Zero Set button and adjust zero as described in the previous paragraph.

  • Page 15: Theory Of Operation

    Theory of Operation General Theory Section 4 Theory of Operation 4.1 General Theory When the ion chamber is exposed to radiation the internal air volume becomes ionized. A dc potential applied between the outer shell and center electrode separates the newly formed ion pairs before they can recombine and collects them.
  • Page 16 Victoreen 470A Operators Manual Figure 4-2. Energy Response Correction Curve...
  • Page 17 Theory of Operation General Theory This instrument is calculated in International Roentgens corrected to 0° Centigrade when used at 22° Centigrade and 760 mm mercury (Hg) barometric pressure. For temperatures other than 22° Centigrade and pressures other than 760 mm Hg, multiply the scale reading by the factor obtained form Table 4-1. Table 4-1.
  • Page 18 Victoreen 470A Operators Manual Figure 4-3. Source Distance...
  • Page 19 Theory of Operation General Theory Figure 4-4. 470A Angular Dependence...
  • Page 20 Victoreen 470A Operators Manual (Blank page)

  • Page 21: Adjustment And Maintenance

    Adjustments and Maintenance Calibration Section 5 Adjustments and Maintenance 5.1 Calibration The 470A is calibrated at the factory. When field recalibration is performed, four correction factors must be remembered. 5.1.1 Energy Dependence Any ion chamber has a certain energy dependence. That is, holding the exposure rate constant, the chamber responds differently to different energy photons.

  • Page 22: Troubleshooting

    If the 470A does not pass its turn-on procedure and operational tests, then the following troubleshooting steps will check the batteries and main circuit board. If these parts test all right, but the 470A still does not work, contact Fluke Biomedical. CAUTION Do NOT attempt to repair the preamplifier.
  • Page 23 Adjustments and Maintenance Troubleshooting Figure 5-1. Exploded View of the 470A...
  • Page 24 Diagram, for further continuity and voltage checks. If the difficulty seems to lie in the preamplifier, return the instrument to Fluke Biomedical. 10. After testing, turn the 470A OFF and wait 2 minutes. Remove the two “D” cells from the handle, and reassemble the instrument in the reverse order of disassembly.
  • Page 25 Adjustments and Maintenance Troubleshooting Figure 5-3. Schematic Circuit Diagram...
  • Page 26 Victoreen 470A Operators Manual (Blank page)

  • Page 27: List Of Electrical Replacement Parts

    Appendix Replacement Parts Appendix A Replacement Parts A.1 List of Electrical Replacement Parts Symbol Designation Part Number Description C1, C3 21-758 Capacitor: 10 μF, 20 V 21-924 Capacitor: 20 μF, 50 V 21-2055 Capacitor: .0082 MFD, 100 V 21-2056 Capacitor: 50 μF, 6 V CR2, CR5 52-91 Diode: 1N4005...
  • Page 28 Victoreen 470A Operators Manual 185-1454 Resistor: 2.2 kΩ, ¼ W, 5% 185-1442 Resistor: 2 MΩ, ¼ W, 5% 470-106 Switch, Function 470-107 Switch, Range 11-111 Switch, Auto Zero 11-112 Switch 14-88 Transformer 63-26 Integrated Circuit CA3086 63-9 Integrated Circuit IT56164...
  • Page 30 Fluke Biomedical Radiation Management Services 6045 Cochran Road Cleveland, Ohio 44139 440.498.2564 www.flukebiomedical.com/rms...