Fluke ScopeMeter 123 Service Manual

4822 872 05375
August 1997, Rev. 3, 01/00
© 1997 Fluke Corporation. All rights reserved. Printed in the Netherlands
All product names are trademarks of their respective companies.
123
Industrial ScopeMeter

Service Manual

Fluke ScopeMeter 123 Specifications

General

Bandwidth	20 MHz
Sample Rate	25 MS/s
Channels	2
Display Resolution	320 x 240 pixels
Display Type	LCD
Battery Life	7 hours
Input Impedance	1 MΩ
Safety Rating	CAT III 600 V
Operating Temperature	0°C to 50°C
Storage Temperature	-20°C to 60°C
Warranty	3 years
Weight	1.2 kg
Voltage Range	600 V
Battery Type	NiMH
Dimensions	232 x 115 x 50 mm

Summary

Chapter 1 Safety Instructions

1.1 Introduction

Introduction to safety instructions for instrument operation.

1.2 Safety Precautions

Essential procedures for correct and safe instrument use.

1.4 Symbols

Defines safety symbols used in manual and on instrument.

Chapter 2 Characteristics

2.1 Introduction

Overview of instrument performance characteristics.

2.2 Dual Input Oscilloscope

Detailed characteristics of oscilloscope function.

2.3 Dual Input Meter

Detailed characteristics of meter function.

2.4 Miscellaneous

Miscellaneous specs: display, power, memory, mechanical.

2.5 Environmental

Environmental specs for operating and storage.

2.7 Safety

Safety standards and specs for instrument design.

Chapter 3 Circuit Descriptions

3.1 Introduction

Intro to circuit descriptions and block diagrams.

3.2 Block Diagram

Overall functional block diagram of the test tool.

3.3 Detailed Circuit Descriptions

In-depth descriptions of specific circuit operations.

Chapter 4 Performance Verification

4.1 Introduction

Intro to performance tests and their importance.

4.2 Equipment Required For Verification

Lists necessary equipment for verification tests.

4.4 Display and Backlight Test

Procedure to test display and backlight functionality.

4.5 Input A and Input B Tests

Tests for accuracy and performance of Input A and B.

Chapter 5 Calibration Adjustment

5.1 General

General info and intro to calibration procedures.

5.3 Starting Calibration Adjustment

Steps to initiate the calibration adjustment process.

5.6 Final Calibration

Procedures for the final calibration steps.

5.7 Save Calibration Data and Exit

Steps to save calibration data and exit maintenance mode.

Chapter 6 Disassembling the Test Tool

6.1. Introduction

Intro to disassembly procedures and safety warnings.

6.2. Disassembling Procedures

Step-by-step instructions for disassembling the test tool.

6.5 Reassembling the Test Tool

Final steps for reassembling the entire test tool.

Chapter 7 Corrective Maintenance

7.1 Introduction

Intro to troubleshooting procedures for isolating problems.

7.2 Starting Fault Finding

Initial steps for diagnosing faults based on test tool behavior.

7.4 Starting with a Dead Test Tool

Procedures for diagnosing a completely non-functional test tool.

7.5 Miscellaneous Functions

Troubleshooting for various functional blocks of the instrument.

7.6 Loading Software

Instructions for loading or reinstalling instrument software.

Chapter 8 List of Replaceable Parts

8.1 Introduction

Introduction to the list of replaceable parts.

8.3 Final Assembly Parts

List of parts for the final assembly of the test tool.

8.5 Main PCA Parts

Detailed list of components on the Main PCA.

Chapter 9 Circuit Diagrams

9.1 Introduction

Intro to circuit diagram conventions and PCA drawings.

9.2 Schematic Diagrams

Tables showing part locations within schematic diagrams.

Chapter 10 Modifications

10.1 Software modifications

Documentation of changes in test tool software.

10.2 Hardware modifications

Documentation of hardware changes and revision history for Main PCA.