Fluke 53, 54, 52, 51, 54 Series II User Manual

51, 52, 53, 54 Series II

®

Thermometer

Service Manual

PN 1276123
October 1999

© 1999 Fluke Corporation. All rights reserved. Printed in USA
All product names are trademarks of thei r r espective c omp ani es.

LIMITED WARRANTY & LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is three years and begins on the date of shipment. Parts, product repairs and
services are warranted for 90 days. This warranty extends only to the original buyer or end-us er cust om er of a
Fluke authorized reseller, and does not apply to fuses, disposable batteries or to any product which, in Fluke’s
opinion, has been misused, altered, neglected or damaged by accident or abnormal conditions of operation or
handling. Fluke warrants that software will operate substantially in accordance with its functional specifications
for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that
software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products t o end-user cust omers only
but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available
if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international
price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product
purchased in one country is submitted for repair in another country.

Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price, free of charge repair, or
replacement of a defective product which is returned to a Fluke authorized service center within the warranty
period.

To obtain warranty service, contact your nearest Fluke authorized serv ic e center or send t he product, wi th a
description of the difficulty, postage and ins urance prepaid (FOB Destination), to the nearest Fluke authorized
service center. Fluke assumes no risk for damage in transit. Following warranty repai r, the product will be
returned to Buyer, transportation prepaid (FOB Destinati on). If Fluke determines that the failure was caused by
misuse, alteration, accident or abnormal condition of operation or handling, Fluke will provide an estimate of
repair costs and obtain authorization before commencing t he work. Followi ng repai r, the product will be
returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation
charges (FOB Shipping Point).

THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIE U OF ALL OTHER
WARRANTIES, EXPRESS OR IM PLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIAB LE FOR
ANY SPECIAL, INDIRECT, INCI DENTA L OR CONSE Q UENTIAL DAMAGES OR LOSSES, INCLUDING LOSS
OF DATA, WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT,
RELIANCE OR ANY OTHER THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or
limitation of incidental or consequential damages, the li mitations and exclusions of this warranty may not apply
to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court of competent
jurisdiction, such holding will not affect the vali dit y or enforceability of any other provision.

Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett WA 98206-9090 5602 B.D.

U.S.A Eindhoven, The Netherlands

Table of Contents

Title Page

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

Service Centers.................................................................................................. 2

International Symbols........................................................................................ 2

Precautions and Safety Information.................................................................. 2

General Specifications .................................................................................. 4

Environmental............................................................................................... 4

Electrical ....................................................................................................... 4

Performance Test and Calibration Required Test Equipment........................... 5

Performance Tests............................................................................................. 5

Display Test .................................................................................................. 5

Keypad Test .................................................................................................. 6

Wide Range Performance Test Procedure .................................................... 6

Ice Bath Construction............................................................................... 6

Ice Bath Test............................................................................................. 7

Verification of IR Communications Port (Fluke 53 and 54)......................... 8

Calibration and Offset Adjustment.................................................................... 9

A/D Calibration............................................................................................. 9

Reference Junction Calibration..................................................................... 11

Using the Offset to Adjust for Variation Between Thermocouples.............. 11

Basic Maintenance............................................................................................. 12

Cleaning the Thermometer............................................................................ 12

Changing the Batteries.................................................................................. 12

Disassembly and Reassembly............................................................................ 13

Disassembly.................................................................................................. 13

Reassembly ................................................................................................... 14

Reinstalling the LCD Assembly............................................................... 14

Rebuilding the Main PCA......................................................................... 14

Reinstalling the Main PCA....................................................................... 15

Replaceable Parts............................................................................................... 15

Index

i

51, 52, 53, 54 Series II

Service Manual

ii

List of Tables

Table Title Page

1. International Electrical Symbols Used in this Manual........................................... 2

2. Recommended Test Equipment............................................................................. 5

3. Performance Test Values (K-Type Therm ocouple )............................................... 8

4. Replaceable Parts................................................................................................... 15

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51, 52, 53, 54 Series II

Service Manual

iv

List of Figures

Figure Title Page

1. Display Segments .................................................................................................. 6

2. Ice Bath Test Equipment Connections................................................................... 7

3. Calibration Connections ........................................................................................ 9

4. Calibration Button Access..................................................................................... 10

5. Battery Access....................................................................................................... 13

6. Exploded View (Model 54 is Shown).................................................................... 17

v

51, 52, 53, 54 Series II

Service Manual

vi

51, 52, 53, 54 Series II

Service Manual

WWarning

To avoid shock or injury, do not perform the performance tests
or calibration procedures described in this manual unless you
are qualified to do so.

Refer to the Safety Information section of this manual before
using the Fluke 51, 52, 53, 54 Series II Thermometers.

Caution

The Fluke 51, 52, 53, 54 Series II Thermometers contain parts
that can be damaged by static discharge.

Follow the standard practices for handling static sensitive
devices.

Introduction

This manual provides the following service information for the 51, 52, 53, and 54 Series

II Thermometers, hereafter referred to as “the thermometer”.

• Precautions and safety information

• Specifications

• Performance tests

• Calibration and adjustment

• Basic maintenance

• Replaceable parts

For complete operating instructions, refer to the 51/52 Series II Users Manual or the 53,
54 Series II Users Manual, located on the 51/54 Series II CD ROM, part number

1276106.

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