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189II/AN
Fluke 189II/AN User Manual
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PN 3270465
February 2008, Rev. 1, 6
/10
© 2008 - 2010 Fluke Corpora
tion. All rights reserv
ed. Printed in
USA. Specification
s are subj
ect
to change w
ithout notice.
All product names are trademarks
of their respectiv
e companies.
189II/AN
True-rms Digital Multimeter
Service Manual
Reproduction and distribution of this technical manual is
authorized for Government Purposes.
2
Table of Contents
Table of Contents
3
Introduction
9
Contacting Fluke
9
Precautions and Safety Information
10
International Symbols
10
Safety Information
11
General Specifications
13
Detailed Specifications
13
AC Voltage Specifications
14
AC Current Specifications
14
DC Voltage Specification
14
DC Current Specifications
15
Resistance Specifications
15
Temperature Specifications
15
Capacitance and Diode Test Specifications
15
Frequency Counter Specifications
16
Frequency Counter Sensitivity
16
MIN MAX, Recording, and Peak Specifications
16
Input Characteristics
17
Burden Voltage (A, Ma, Μa)
17
Unpacking the Meter
17
Inspection
17
Hazardous Voltage
18
Required Equipment
18
Theory of Operation
19
Analog Signal Conditioning
19
Control Section
19
Power Supply
19
Block Diagram
20
Testpoint Locations
20
Fault Isolation Techniques
20
Wear Tolerance
20
Trouble Symptoms
20
Logic
20
Restoration Actions
20
Basic Maintenance
23
Opening the Meter Case
23
Removing and Reinserting the Printed Circuit Assembly
23
Reassembling the Meter Case
24
Testing Fuses (F1 and F2)
24
Replacing Fuses
25
Replacing the Batteries
25
Cleaning
26
Performance Tests
26
Factory Default
27
Power LED Test
27
Backlight Test
27
Current Terminal Sensing Test
27
Keypad Test
27
LCD Test
27
IR Port Verification
28
Temperature Accuracy Test
28
Accuracy Tests for Volts, Current, Ω, E, and G Test Functions
29
Calibration Adjustment
32
Operation
33
Entering the Password
33
Changing the Password
33
Restoring Factory Default Password
33
Calibration Adjustment Procedure
34
Screenshot Description
34
Softkeys
35
Navigation Buttons
35
Mode Buttons
35
Description of Calibration Adjustment Steps
35
Power Cycle
36
Calibration Adjustment Steps
36
Parts
41
Schematic Diagrams
43
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Fluke 189II/AN Specifications
General
Brand
Fluke
Model
189II/AN
Category
Measuring Instruments
Language
English
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