Fluke 771 Use and care manual

®
771
Milliamp Process Clamp Meter
Calibration Manual
November 2007
© 2007 Fluke Corporation, All rights reserved. Printed in USA. Product specifications are subject to change without notice.
All product names are trademarks of their respective companies.
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LIMITED WARRANTY AND LIMITATION OF LIABILITY
This Fluke product will be free from defects in material and workmanship for 3 years (one year for cable and
clamp) from the date of purchase. This warranty does not cover fuses, disposable batteries or damage from
accident, neglect, misuse or abnormal conditions of operation or handling. Resellers are not authorized to
extend any other warranty on Fluke’s behalf. To obtain service during the warranty period, send your
defective Meter to the nearest Fluke Authorized Service Center with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A
PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE
OR THEORY. Since some states or countries do not allow the exclusion or limitation of an implied warranty
or of incidental or consequential damages, this limitation of liability may not apply to you.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99
To register your product online, visit http://register.fluke.com
[e-mail] Fluke-Direct.ca

i
Table of Contents
Title Page
Introduction........................................................................................................ 1
Contacting Fluke................................................................................................ 2
Safety Information ............................................................................................. 2
Symbols ............................................................................................................. 3
Specifications..................................................................................................... 4
Getting Acquainted with the Meter.................................................................... 5
Maintenance....................................................................................................... 6
Cleaning the Meter ........................................................................................ 6
Battery Replacement ..................................................................................... 6
Performance Tests.............................................................................................. 8
Required Equipment...................................................................................... 8
Testing the Batteries ...................................................................................... 8
Testing the Display........................................................................................ 9
Display Hold Test.......................................................................................... 9
Backlight Test................................................................................................ 9
Spotlight LED Test........................................................................................ 9
Zero Test........................................................................................................ 9
Accuracy Tests .............................................................................................. 9
Calibration Adjustment...................................................................................... 11
Adjustment Subroutines ................................................................................ 11
Front Panel Operation for Adjustment .......................................................... 11
Calibration Error Messages ........................................................................... 12
Calibration Adjustment Procedure ................................................................ 12
Temperature Adjustment Procedure.............................................................. 13
Low Range Adjustment Procedure................................................................ 13
High Range Adjustment Procedure ............................................................... 13
Phase Adjustment Procedure......................................................................... 14
User Replaceable Parts ...................................................................................... 15
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771
Calibration Manual
ii
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iii
List of Tables
Table Title Page
1. Symbols.................................................................................................................. 3
2. Required Equipment............................................................................................... 8
3. Accuracy Tests ....................................................................................................... 10
4. Error Messages....................................................................................................... 12
5. Replaceable Parts ................................................................................................... 15
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771
Calibration Manual
iv
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v
List of Figures
Figure Title Page
1. The 771 Milliamp Process Clamp Meter ............................................................... 5
2. Changing the Batteries ........................................................................................... 7
3. Display Test ........................................................................................................... 9
4. Accessing the Calibration Button........................................................................... 12
5. Phase Adjustment................................................................................................... 14
6. Replaceable Parts ................................................................................................... 16
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771
Calibration Manual
vi
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1
771
Milliamp Process Clamp Meter
Introduction
XW Warning
To avoid electric shock or personal injury, do not perform the
calibration verification tests or calibration procedures
described in this manual unless you are qualified to do so.
The information provided in this manual is for the use of
qualified personnel only.
This manual provides the complete verification and adjustment procedure for the
771 Milliamp Process Clamp Meter (referred to in this manual as the Meter).
The Meter allows closed-case calibration using reference sources. It measures the
reference signals, calculates the correction factors, and stores them in memory. The
instrument should be calibrated after repair, or if it fails a performance test.
The 771 Calibration Manual provides the following information:
•Precautions and safety information
•Specifications
•Basic maintenance
•Calibration verification procedure
•Replaceable parts and accessories
For complete operating instructions, refer to the 771 Instruction Sheet.
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771
Calibration Manual
2
Contacting Fluke
To contact Fluke, call:
1-888-993-5853 in USA
1-800-363-5853 in Canada
[phone] in Europe
[phone] in Japan
[phone] in Singapore
[phone] from anywhere in the world
Or, visit Fluke’s Web site at www.fluke.com
To register your product, visit http://register.fluke.com
Safety Information
In this manual, a Warning identifies conditions and actions that pose hazard(s) to the
user. A Caution identifies conditions and actions that may damage the test instrument.
The design and manufacture of the device conforms to the latest state of technology and
the safety standards specified in IEC 61010-1/ 2nd edition. If used improperly, there is a
risk of damage to persons and property.
XWWarning
To avoid possible electric shock or personal injury, follow these
guidelines:
•Read this manual before use and follow all safety
instructions.
•Use the Meter only as specified in this manual; otherwise,
the Meter's safety features may be impaired.
•Before each use inspect Meter and cable for damage. Look
for cracks and missing portions of the clamp and cable. Do
not use if clamp is damaged.
•Use caution when working with voltages above 33 V rms
47 V peak or 70 V dc these voltages pose a shock hazard.
•Do not use to measure ac current.
•Do not use to measure dc mA in circuits carrying more
than 300 V CAT II.
•Avoid working alone so assistance can be rendered in an
emergency.
•Use extreme caution when working around bare
conductors or bus bars. Contact with the conductor could
result in electric shock.
•To avoid false readings that can lead to electrical shock
and injury, replace the batteries as soon as the low battery
indicator (B) appears.
•Adhere to local and national safety codes. Individual
protective equipment must be used to prevent shock and
arc blast injury where hazardous live conductors are
exposed.
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