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867B
Fluke 867B Service Manual
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®
867B,863
Graphical Multimeters
Service Manual
PN 689312
December 1997
© 1997 Fluke Corporation, A
ll rights reserved. Printed in U.S.A.
All product names a
re tradem
arks of their r
espective com
panies.
2
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
3
Introduction and Specifications
9
Introduction
9
Description
9
Power Requirements
9
Options, Accessories and Related Equipment
10
Operating Instructions
10
Obtaining Service
10
Conventions Used in this Manual
11
Chapter Contents
11
Specifications
12
Introduction and Specifications
13
Frequency Measurements
19
Theory of Operation
21
Chapter 2
23
Introduction
23
Start-Up Sequence
23
Function Selection
23
Power Supply
24
Power Supply Input Voltages
24
Block Diagram
25
Power Supply Output Voltages and Currents
26
Power Supply Signals
27
Power ON/OFF Requirements
28
Nicd Charging Requirements
28
Battery and Line Level Detection
28
Power Source Detection
29
Power Supply Functional Blocks
29
Input Power Selector (A)
29
Boost Preregulator (B)
30
Battery Charger (C)
30
Power Supply Blocks
31
DC-DC Converter (D)
32
Backlight Current Sink (E)
32
Power Switch Circuitry (F)
32
LCD Contrast Control (G)
32
Power-On Reset Circuit (H)
32
Linear Post Regulators (I)
33
Input Overload Protection
33
Volt/Ohms Input Protection
33
External Trigger and Logic Activity Input Protection
34
Amps / Ma / Μa Input Protection
34
Input Signal Conditioning
34
AC Volts
34
Average Converter
35
DC Volts
36
MV DC
36
Ohms
37
Diode Test
37
Capacitance
37
Ma/Μa
38
Amps
38
Waveform Processing
39
Overview
39
Detailed Description
39
Waveform Triggering
40
Overview
40
Dual Trigger
40
Single Trigger
41
External Trigger
41
Glitch Capture
42
Single Shot
42
Frequency Trigger
42
Logic Activity Trigger
42
Peak Hold
42
Auto Diode
42
Component Test
43
Digital Circuitry
44
Serial Port
44
Keypad Connections
45
Maintenance
46
Chapter 3
47
Introduction
47
Warranty Repairs and Shipping Information
47
Static-Safe Handling
47
Cleaning
48
Disassembly
48
Reasssembly
51
Replacing the 440 Ma Fuse
53
Replacing the 11A (High Energy) Fuse
53
Perfomance Testing and Calibration
54
Chapter 4
55
Introduction
55
Required Test Equipment
55
Alternative Test Equipment (Fluke 5500A)
55
Performance Tests
56
MV DC Test
56
Recommended Test Equipment
56
Configuration 1 (MV DC)
57
DC Volts Performance Test
58
DC Volts Test
58
Diode Test
59
AC Volts Test
60
AC Volts RMS Performance Test
60
Configuration 6 (AC Volts)
61
Ohms and Conductance Tests
62
Ohms Performance Test
62
Capacitance Performance Test
63
Capacitance Test
63
Frequency Test
64
Frequency (AC Volts) Performance Test
64
Configuration 7 (PM5139)
65
Duty Cycle Performance Test
66
Duty Cycle Test
66
Logic Performance Test
67
Logic Test (867B Only)
67
Amps Tests
68
AC Amps Average Performance Test
69
Configuration 4 (Amps, DC and AC)
70
Peak Hold Test
71
Component Test (867B Only)
71
Rel Test/Touch Hold Test
72
Glitch Capture Test
73
External Trigger Test
73
Calibration
74
Measuring the System Resistance
74
Starting Calibration Mode on the GMM
74
MV DC Calibration
75
DC Volts Calibration
76
DC Maua Calibration
76
DC Amps Calibration
76
Ohms/Ns Calibration
77
Modifying the Displayed Value
77
Ohms Calibration
78
AC Volts Calibration
79
AC Amps Calibration
79
AC Maµa Calibration
79
Internal Constants Calibration
80
Setting LCD Voltage
80
List of Replaceable Parts
81
Chapter 1
81
Introduction
81
Introduction
82
How to Obtain Parts
82
Manual Status Information
82
Newer Instruments
82
Service Centers
83
Parts
83
Series Final Assembly
84
Series Final Assembly
85
A1 Main PCA
87
A1 Main PCA
94
Schematic Diagrams
96
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Fluke 867B Specifications
General
True RMS
Yes
Diode Test
Yes
Continuity Check
Yes
Safety Rating
CAT III 1000 V, CAT IV 600 V
Max Voltage AC/DC
1000 V
Max Current AC/DC
10 A
Battery Life
200 hours
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