Fluke 451B User Manual

451B

Ion Chamber Survey Meter

PN FBC-0058
September 2013, Rev. 1

© 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

Operators Manual

Warranty and Product Support

Fluke Biomedical warrants this instrument against defects in materials and workmanship for one full year
from the date of original purchase. During the warranty period, we will repair or, at our option, replace at no
charge a product that proves to be defective, provided you return the product, shipping prepaid, to Fluke
Biomedical. This warranty does not apply if the product has been damaged by accident or misuse or as the
result of service or modification by other than Fluke Biomedical. IN NO EVENT SHALL FLUKE
BIOMEDICAL BE LIABLE FOR CONSEQUENTIAL DAMAGES.

Only serialized products and their accessory items (those products and items bearing a distinct serial
number tag) are covered under this one-year warranty. PHYSICAL DAMAGE CAUSED BY MISUSE OR
PHYSICAL ABUSE IS NOT COVERED UNDER THE WARRANTY. Items such as cables and nonserialized
modules are not covered under this warranty.

Recalibration of instruments is not covered under the warranty.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to
state, province to province, or country to country. This warranty is limited to repairing the instrument to Fluke
Biomedical’s specifications.

Notices

All Rights Reserved

 Copyright 2013, Fluke Biomedical. No part of this publication may be reproduced, transmitted, transcribed, stored in a
retrieval system, or translated into any language without the written permission of Fluke Biomedical.

Copyright Release

Fluke Biomedical agrees to a limited copyright release that allows you to reproduce manuals and other printed materials
for use in service training programs and other technical publications. If you would like other reproductions or distributions,
submit a written request to Fluke Biomedical.

Unpacking and Inspection

Follow standard receiving practices upon receipt of the instrument. Check the shipping carton for damage. If damage is
found, stop unpacking the instrument. Notify the carrier and ask for an agent to be present while the instrument is
unpacked. There are no special unpacking instructions, but be careful not to damage the instrument when unpacking it.
Inspect the instrument for physical damage such as bent or broken parts, dents, or scratches.

Technical Support

For application support or answers to technical questions, either email [e-mail] or call 1-800- 850­4608 or 1-440-248-9300. In Europe, email [e-mail] or call [phone].

Claims

Our routine method of shipment is via common carrier, FOB origin. Upon delivery, if physical damage is found, retain all
packing materials in their original condition and contact the carrier immediately to file a claim. If the instrument is delivered
in good physical condition but does not operate within specifications, or if there are any other problems not caused by
shipping damage, please contact Fluke Biomedical or your local sales representative.

Returns and Repairs

Return Procedure

All items being returned (including all warranty-claim shipments) must be sent freight-prepaid to our factory location. When
you return an instrument to Fluke Biomedical, we recommend using United Parcel Service, Federal Express, or Air Parcel
Post. We also recommend that you insure your shipment for its actual replacement cost. Fluke Biomedical will not be
responsible for lost shipments or instruments that are received in damaged condition due to improper packaging or
handling.

Use the original carton and packaging material for shipment. If they are not available, we recommend the following guide
for repackaging:

 Use a double–walled carton of sufficient strength for the weight being shipped.
 Use heavy paper or cardboard to protect all instrument surfaces. Use nonabrasive material around all

projecting parts.

 Use at least four inches of tightly packed, industry-approved, shock-absorbent material around the

Returns for partial refund/credit:

Every product returned for refund/credit must be accompanied by a Return Material Authorization (RMA) number,
obtained from our Order Entry Group at 1-440-498-2560.

Repair and calibration:

To find the nearest service center, go to www.flukebiomedical.com/service or

In the U.S.A.:
Cleveland Calibration Lab
Tel: [phone] x2564
Email: [e-mail]

Everett Calibration Lab
Tel: 1-888-99 FLUKE (1-888-993-5853)
Email: [e-mail]

In Europe, Middle East, and Africa:
Eindhoven Calibration Lab
Tel: [phone]
Email: [e-mail]

In Asia:
Everett Calibration Lab
Tel: [phone]
Email: [e-mail]

instrument.

To ensure the accuracy of the Product is maintained at a high level, Fluke Biomedical recommends the product
be calibrated at least once every 12 months. Calibration must be done by qualified personnel. Contact your local
Fluke Biomedical representative for calibration.

Certification

This instrument was thoroughly tested and inspected. It was found to meet Fluke Biomedical’s manufacturing
specifications when it was shipped from the factory. Calibration measurements are traceable to the National Institute of
Standards and Technology (NIST). Devices for which there are no NIST calibration standards are measured against in­house performance standards using accepted test procedures.

WARNING

Unauthorized user modifications or application beyond the published specifications may result in electrical shock hazards
or improper operation. Fluke Biomedical will not be responsible for any injuries sustained due to unauthorized equipment
modifications.

Restrictions and Liabilities

Information in this document is subject to change and does not represent a commitment by Fluke Biomedical.
Changes made to the information in this document will be incorporated in new editions of the publication. No
responsibility is assumed by Fluke Biomedical for the use or reliability of software or equipment that is not
supplied by Fluke Biomedical, or by its affiliated dealers.

Manufacturing Location

The 451B Ion Chamber Survey Meter is manufactured at Fluke Biomedical, 6920 Seaway Blvd., Everett, WA,
U.S.A.

Table of Contents

Title Page

Introduction ............................................................................................ 1

Intended Use ......................................................................................... 1

Safety Information ................................................................................. 2

Features ................................................................................................ 5

Overrange Rate ................................................................................. 5

Low Batter Indicator ........................................................................... 5

Audio Alarm ....................................................................................... 5

Integrate Mode .................................................................................. 5

Freeze Mode ..................................................................................... 5

Auto-On Backlight .............................................................................. 5

Specifications ........................................................................................ 6

Receiving Inspection ............................................................................. 8

Operation ............................................................................................... 9

External Controls ............................................................................... 9

ON/OFF Button .............................................................................. 9

Mode Button .................................................................................. 9

Freeze Mode ................................................................................. 10

Integrate Mode .............................................................................. 10

Self-Test ........................................................................................ 11

Installation ......................................................................................... 11

Operational check .............................................................................. 12

Optional Check Source Use .............................................................. 13

Theory of Operation .............................................................................. 13

Maintenance .......................................................................................... 16

Preventive Maintenance .................................................................... 16

Routine Cleaning ............................................................................... 16

Storage .............................................................................................. 16

Battery Replacement ......................................................................... 17

Replaceable Parts Information .......................................................... 19

Recalibration and Service Information ............................................... 19

Troubleshooting ................................................................................. 20

Self-Test Failure ............................................................................ 20

High Background Readings ........................................................... 20

Erratic Readings ............................................................................ 20

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List of Tables

Table Title Page

1. Symbols ..................................................................................................... 2

2. Bar Graph Display Update Periods ........................................................... 14

3. Replaceable Parts List .............................................................................. 19

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List of Figures

Figure Title Page

1. Fluke 451B Ion Chamber Survey Meter .................................................... 4

2. Model 451B-DE-SI Typical Energy Dependence ...................................... 7

3. Model 451B Typical Energy Dependence ................................................. 8

4. Location of RS-232 port ............................................................................ 12

5. Battery Access .......................................................................................... 18

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