Fluke 867B Service Manual

®
867B,863
Graphical Multimeters
Service Manual
PN 689312
December 1997
© 1997 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.

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

Summary

Chapter 1 Introduction and Specifications

1-1. Introduction

Overview of the manual's scope and contents.

1-2. Description

Overview of the Graphical Multimeter's capabilities.

1-3. Power Requirements

Details on power sources, battery types, and operational life.

1-9. Specifications

Detailed technical specifications including environmental and performance parameters.

Chapter 2 Theory of Operation

2-1. Introduction

Outlines the chapter's focus on functional blocks.

2-4. Power Supply

Explains the instrument's power management system.

2-22. Volt/Ohms Input Protection

Details protection circuits for voltage and resistance inputs.

2-34. Waveform Processing

Describes how AC and DC signals are processed for display.

2-37. Waveform Triggering

Explains the hardware triggers for waveform capture.

2-49. Digital Circuitry

Overview of the microprocessor and digital gate array functions.

Chapter 3 Maintenance

3-1. Introduction

Overview of handling, cleaning, and assembly procedures.

3-3. Static-Safe Handling

Crucial guidelines for preventing ESD damage to components.

3-5. Disassembly

Step-by-step guide to taking the instrument apart.

3-7. Replacing the 440 mA Fuse

Procedure for replacing the low-energy fuse.

Chapter 4 Performance Testing and Calibration

4-1. Introduction

Introduction to performance verification and calibration.

4-2. Required Test Equipment

Lists the necessary calibration and test equipment.

4-5. mV DC Test

Detailed procedure for testing mV DC measurement accuracy.

4-8. AC Volts Test

Detailed procedure for testing AC voltage measurement accuracy.

4-9. Ohms and Conductance Tests

Procedures for testing resistance and conductance functions.

4-20. Calibration

Overview of the instrument's calibration process and requirements.

4-23. mV DC Calibration

Specific steps for calibrating the mV DC measurement range.

4-34. Setting LCD Voltage

Procedure to set the LCD contrast and mid-point voltage.

Chapter 5 List of Replaceable Parts

5-1. Introduction

Overview of the chapter's listing of parts.

5-2. How To Obtain Parts

Instructions for ordering replacement parts and required information.

5-5. Service Centers

Information on locating Fluke service centers.

5-6. Parts

Detailed list of replaceable parts with stock numbers and descriptions.

Chapter 6 Schematic Diagrams

6-1. A1 Main PCA Assembly

Schematic diagram of the main Printed Circuit Assembly (PCA).