Fluke 189, 187 Service Manual

187/189

®

True RMS Multimeter

Calibration Manual

PN 1584337
November 2000 Rev.1, 6/02

© 2000-2002 Fluke Corporation. All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.

LIFETIME L IMITED WARRANTY

Each Fluke 20, 70, 80, 170 and 180 Series DMM will be free from defec t s in material and workmanship for its lifetime. As

used herein, “lifetime” is defined as seven years after Fluke discontinues m anuf acturing the product, but the warranty period
shall be at least ten years from the date of purchase. Thi s warranty does not cover fuses, disposable batteri es, damage
from neglect, misus e, contamination, alteration, accident or abnormal condi tions of operation or handling, inc l udi ng failures
caused by use outside of the product’s specifi cations, or normal wear and tear of mechanical components. This warranty
covers the original purchas er onl y and i s not transferable.

For ten years from the date of purchase, this warranty als o covers the LCD. Thereafter, f or the lifetime of the DMM, Fluke
will replace the LCD for a fee based on then current c omponent acquisition costs.

To establish original ownership and prove date of purchase, please complete and return the registration card
accompanying the product, or register your product on http://www.fluke.com. Fluke will, at its option, repair at no charge,
replace or refund the purchase price of a defective product purchas ed t hrough a Fl uke authorized sales outlet and at the
applicable international pric e. Fl uke reserves the right to c harge for importation costs of repai r/replacement parts if t he
product purchased in one country i s sent for repair elsewhere.

If the product is defective, contact your nearest Fluke authorized service center to obtain return aut hori zation information,
then send the product to that service center, with a description of the diffi culty, postage and insurance prepaid (FOB
Destination). Fluke assumes no ris k for damage in transit. Fluke will pay return transportation for product repaired or
replaced in-warranty. Before making any non-warrant y repair, Fluke will estimate cost and obtain authorization, then
invoice you for repair and return transportation.

THIS WARRANTY IS Y O UR ONLY REMEDY. NO OTHER WARRANT IES, SUCH AS FIT NESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY
CAUSE OR THEORY. AUTHORIZED RESELLERS ARE NOT AUTHORIZED TO EXTEND ANY DIFFERENT
WARRANTY ON FLUKE’S BEHA LF. Since some states do not allow the exclusion or li m i t ation of an implied warranty or
of incidental or consequential damages, this limitation of liability may not apply to you. I f any provision of this warranty is
held invalid or unenforceable by a court or other decis ion-maker of competent jurisdiction, such holding will not affect the
validity or enforceability of any other provision.

2/02

Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett, WA 98206-9090 5602 BD Eindhoven
U.S.A. The Netherlands

Table of Contents

Title Page

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

Contacting Fluke ............................................................................................... 1

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

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

Safety Information............................................................................................. 3

Specifications .................................................................................................... 4

Accuracy ....................................................................................................... 4

Feature Summary.......................................................................................... 4

Basic Specifications .......................................................................................... 5

Detailed Accuracy Specifications ..................................................................... 6

Frequency Counter Sensitivity.......................................................................... 9

Burden Voltage (A, mA, µA)............................................................................ 9

Input Characteristics.......................................................................................... 9

Required Equipment.......................................................................................... 10

Basic Maintenance ............................................................................................ 11

Opening the Meter Case................................................................................ 11

Removing and Reinserting the Circuit Board Assembly.............................. 11

Replacing the LCD........................................................................................ 12

Reassembling the Meter Case....................................................................... 13

Testing Fuses (F1 and F2)............................................................................. 13

Replacing Fuses ............................................................................................ 14

Replacing the Batteries................................................................................. 14

Cleaning........................................................................................................ 15

Performance Tests............................................................................................. 16

Testing the Display ....................................................................................... 16

Backlight Test............................................................................................... 16

Current Terminal Sensing Test..................................................................... 16

Keypad Test .................................................................................................. 17

Verification of the IR Communication Port.................................................. 17

Testing Temperature..................................................................................... 17

Testing Voltage, Current, Resistance, Capacitance and Diode Functions.... 18

Calibration......................................................................................................... 21

Keypad Interface........................................................................................... 21

General Procedure......................................................................................... 22

Special Requirements.................................................................................... 23

Calibration Inputs.......................................................................................... 23

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Calibration Manual

Remote Interface........................................................................................... 25

Temperature Calibration............................................................................... 25

Setup......................................................................................................... 25

Procedure.................................................................................................. 26

Re-Programming Serial Number or Model Number..................................... 26

Parts and Accessories........................................................................................ 27

ii

List of Tables

Table Title Page

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

2. Required Tools and Equipment............................................................................. 10

3. Temperature Test Input and Display..................................................................... 17

4. Performance Test Steps ......................................................................................... 18

5. Calibration Inputs .................................................................................................. 23

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Calibration Manual

iv

List of Figures

Figure Title Page

1. Removing LCD Mask to Access LCD................................................................... 12

2. Testing the Current Fuses...................................................................................... 14

3. Battery and Fuse Replacement .............................................................................. 15

4. Display Test........................................................................................................... 16

5. Locating Recessed Calibration Button.................................................................. 21

6. Calibration Display................................................................................................ 22

7. Replacement Parts and Accessories....................................................................... 28

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Calibration Manual

vi

Introduction

To avoid shock or injury, do not perform the verificati on t est s
or calibration procedures described in this manual unless you
are qualified to do so.

The information provided in this document is for the use of
qualified personnel only.

The 187 & 189 Multimeters contain parts t hat can be damaged
by static discharge.

Follow the standard practices for handling static sensitive
devices.

The information in this manual deals with the Fluke Models 187 & 189 True RMS

Multimeters, (hereafter referred to as “the meter”). Information provided includes:

• Precautions and safety information

• Specifications

• Basic maintenance (cleaning, replacing the battery and fuses)

• Performance test procedures

• Calibration and calibration adjustment procedures

• Accessories and replaceable parts

W Warning

Caution

For complete operating instructions, refer to the Model 187 & 189 Users Manual located

on the 187/189 CD ROM.

Contacting Fluke

To order accessories, receive assistance, or locate the nearest Fluke distributor or Service
Center, call:

USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: [phone]
Japan: [phone]
Singapore: [phone]
Anywhere in the world: [phone]

Address correspondence to:
Fluke Corporation Fluke Europe B.V.

P.O. Box 9090, P.O. Box 1186,
Everett, WA 98206-9090 5602 BD Eindhoven
USA The Netherlands

Visit us on the World Wide Web at: www.fluke.com

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Precautions and Safety Information

International Symbols

WWarning

If this product is used in a manner not specif ied by the
manufacturer, the protection provided by the equipment may
be impaired.

Read the “Safety Information” page before servicing this product.
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 Meter or the test
instruments.

International symbols used on the Meter and in this manual are explained in Table 1.

Table 1. International Symbols

Symbol Meaning Symbol Meaning

Alternating current Earth ground

Direct current
Alternating or direct current Conforms to European Union

Refer to the manual. Important

information.

Inspected and licensed by TÜV

Product Services.

Battery

Conforms to VDE Standards

Fuse

directives

Conforms to relevant Canadian

Standards Association directives

Double insulated

Underwriters Laboratories, Inc.

2

Safety Information

WWarnings and Precautions

To avoid possible electric shock or personal injury, follow these guidelines:

Do not use the Meter if it is damaged. Before you use the Meter, inspect the case.

•

Look for cracks or missing plastic. Pay particular attention to the insulation
surrounding the connectors.

Inspect the test leads for damaged insulation or exposed metal. Check the test

•

leads for continuity. Replace damaged test leads before you use the Meter.
Do not use the Meter if it operates abnormally. Protection may be impaired. When

•

in doubt, have the Meter serviced.
Do not operate the Meter around explosive gas, vapor, or dust.

•

Do not apply more than the rated voltage, as marked on the Meter, between

•

terminals or between any terminal and earth ground.

Before use, verify the Meter’s operation by measuring a known voltage.

•

When measuring current, turn off circuit power before connecting the Meter in the

•

circuit. Remember to place the Meter in series with the circuit.

True RMS Multimeter

Safety Information

When servicing the Meter, use only specified replacement parts.

•

Use caution when working above 30 V ac rms, 42 V peak, or 60 V dc. Such

•

voltages pose a shock hazard.
Avoid working alone.

•

When using the probes, keep your fingers behind the finger guards on the probes.

•

Connect the common test lead before you connect the live test lead. When you

•

disconnect test leads, disconnect the live test lead first.
Remove test leads from the Meter before you open the battery door.

•

Do not operate the Meter with the battery door or portions of the cover removed or

•

loosened.
To avoid false readings, which could lead to possible electric shock or personal

•

injury, replace the batteries as soon as the low battery indicator (M) appears.
Use only type AA batteries, properly installed in the Meter case, to power the

•

Meter.

Caution

To avoid possible damage to the Meter or to the equipment under test, follow these
guidelines:

• Disconnect circuit power and discharge all high-voltage capacitors before testing

resistance, continuity, diodes, or capacitance.

• Use the proper terminals, function, and range for your measurements.

• Before measuring current, check the Meter's fuses and turn power OFF to the

circuit before connecting the Meter to the circuit.

3