Fluke 481 Operator's Manual
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Fluke 481 Operator's Manual

Fluke 481 Operator's Manual

Ion chamber survey
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
481
Ion Chamber Survey Meter
Operators Manual
April 2011, Rev.1, 9/13
© 2011, 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

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Summary of Contents for Fluke 481

  • Page 1 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com Ion Chamber Survey Meter Operators Manual April 2011, Rev.1, 9/13 © 2011, 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price.

  • Page 3: Table Of Contents

    Table of Contents Title Page Introduction .................... 1 Intended Use ..................1 Safety Information ................. 2 How to Contact Fluke ................4 Features ....................5 Overrange Rate ................. 5 Low Battery Indicator ................. 5 Audio Alarm ..................5 Integrate Mode .................. 5 Freeze Mode ..................
  • Page 4 Operators Manual...

  • Page 5: List Of Tables

    List of Tables Table Title Page Symbols ..................... 2 Bar Graph Display Update Periods ............14 Replaceable Parts List ................17...
  • Page 6 Operators Manual...

  • Page 7: List Of Figures

    List of Figures Figure Title Page Fluke 481 Ion Chamber Survey Meter ............4 Battery Access ..................17...
  • Page 8 Operators Manual...

  • Page 9: Introduction

    Introduction The Model 481 Ion Chamber Survey Meter (the Survey Meter) is a hand-held, battery operated meter designed to measure beta above 100 keV and gamma and x-ray radiation above 7 keV, using the latest CMOS and LCD technology. The Survey Meter case is constructed of high strength ABS plastic. A gasket and desiccant pack seal moisture out of the Survey Meter and provide a cushion for the internal components.

  • Page 10: Safety Information

    WEEE Directive Annex I, hazardous materials handler per this product is classed as local regulations. Contact your category 9 "Monitoring and authorized Fluke Service Center for Control Instrumentation" product. recycling information. Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for recycling...
  • Page 11 Ion Chamber Survey Meter Safety Information • Replace the batteries when the low battery indicator shows to prevent incorrect measurements. • Comply with local and national safety codes. Use personal protective equipment. • Carefully read all instructions. • Do not touch voltages > 30 V ac rms, 42 V ac peak, or 60 V dc.

  • Page 12: How To Contact Fluke

    Operators Manual gpl01.bmp Figure 1. Fluke 481 Ion Chamber Survey Meter...

  • Page 13: Features

    Ion Chamber Survey Meter Features Features The following sections describe the features of the Survey Meter. Overrange Rate If the instantaneous radiation rate measured by the Survey Meter exceeds 50 R/h (0.5 Sv/h), the 'R' in R/h or the 'Sv' in Sv/h displayed will blink to notify the user that the radiation field exceeds the measuring capability of the Survey Meter.

  • Page 14: Specifications

    Radiation Detected ..........Beta above 100 keV, gamma above 7 keV Operating Ranges ..........481: 0 mR/h to 5 mR/h, 0 mR/h to 50 mR/h, 0 mR/h to 500 mR/h, 0 R/h to 5 R/h, 0 R/h to 50 R/h 481-DE-SI: 0 μSv/h to 50 μSv/h, 0 μSv/h to 500 μSv/h, 0 mSv/h to...
  • Page 15 Audio Alarm ............Set through communication programs. Setting at 1 % increments, 1 % to 100 % full scale Temperature Sensor ..........A temperature sensor in the 481-DE-SI is used to adjust for offset drift due to temperature. Readings are not corrected for changes in air density due to pressure and temperature Check Source ............

  • Page 16: Receiving Inspection

    2. Check that all items listed on the packing slip are present and in good condition. If damage is evident, make a claim with the carrier and contact Fluke immediately. If items are missing, contact Fluke. See the How to Contact Fluke...

  • Page 17: Operation

    Ion Chamber Survey Meter Operation Operation The following sections describe the operation of the Survey Meter.  Warning To prevent possible electrical shock, fire, or personal injury, do not put metal objects into connectors. External Controls There are two external controls on the Survey Meter: an ON/OFF button and a MODE button.

  • Page 18: Freeze Mode

    Operators Manual Freeze Mode When configured to select the Freeze mode, the MODE button acts as a toggle switch. Press the button until FREEZE appears on the display. Operation in the Freeze mode gives the user a constant reference of the highest exposure rate obtained from the time the freeze function is initialized.

  • Page 19: Self-Test

    • Be sure that the Survey Meter and terminal are properly connected via the RS-232 cable. If there is still a problem, contact Fluke for further instructions. See the How to Contact Fluke section in this manual.

  • Page 20: Operational Check

    Operators Manual Operational check Fluke recommends an operational check upon receipt of the Survey Meter and before each use. Monitor the start sequence. These results indicate the Survey Meter is operating correctly: • There are no error messages in the startup sequence.

  • Page 21: Theory Of Operation

    Ion Chamber Survey Meter Theory of Operation Theory of Operation  Warning To prevent personal injury, use care in handling this assembly during removal and installation. This Product contains lithium cells with a potential voltage of 63 V on the battery assembly. ...
  • Page 22 Operators Manual The bar graph display is a digital presentation, programmed to appear as a linear analog meter display. It is also referred to as the analog display throughout this manual. Table 2. Bar Graph Display Update Periods Range Update Period 50 R/h (500 mSv/h) 0.05 second 5 R/h (50 mSv/h)

  • Page 23: Maintenance

    1 hour. The display will indicate HI for good chamber voltage bias condition. The program in the Survey Meter ROM is proprietary to Fluke. The firmware version appears in the digital part of the LCD display (prior to the “all elements on”...

  • Page 24: Routine Cleaning

    Operators Manual Routine Cleaning Do not immerse the Survey Meter. The Survey Meter is not waterproof; liquid could damage the circuits. The Survey Meter should be kept clean and free from dirt and contamination. To clean the Survey Meter, wipe with a damp cloth using any commercially available cleaning or decontaminating agent.

  • Page 25: Replaceable Parts Information

    Figure 2. Battery Access Replaceable Parts Information Fluke maintains a complete inventory of all normal replaceable parts. To place an order, or to obtain information concerning replaceable parts, contact Fluke. See the How to Contact Fluke section in this manual.

  • Page 26: Recalibration And Service Information

    Recalibration and Service Information If your Survey Meter needs recalibration or repair, we request that you contact Fluke. See the How to Contact Fluke section in this manual. More information concerning the operation, application, or service of your Survey Meter may be obtained from the applications engineer at the numbers listed above.

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