Fluke 77 Series III User Manual

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Table of Contents
Chapter Title Page
1 Introduction and Specifications................................. 1-1
1-1. Introduction ................................................................. 1-3
1-2. Organization of the Service Manual ........................... 1-3
1-3. Conventions ................................................................ 1-4
1-4. Specifications .............................................................. 1-4
2 Theory of Operation.................................................... 2-1
2-1. Introduction ................................................................. 2-3
2-2. Functional Block Description ..................................... 2-3
2-3. Detailed Description ................................................... 2-3
2-4. Voltage Signal Conditioning .................................. 2-3
2-5. Current Conditioning .............................................. 2-4
2-6. Ohms ....................................................................... 2-4
2-7. Additional Circuitry ................................................ 2-4
2-8. AC Converter ..................................................... 2-5
2-9. Active Filter ....................................................... 2-5
2-10. Rotary Switch ..................................................... 2-5
2-11. A/D Conversion .................................................. 2-5
3 Maintenance ................................................................ 3-1
3-1. Introduction ................................................................. 3-3
3-2. PCA Access and General Maintenance ...................... 3-3
3-3. Display Access ............................................................ 3-4
3-4. Cleaning ...................................................................... 3-4
3-5. Performance Test ........................................................ 3-7
3-6. Initial Procedure ..................................................... 3-7
3-7. DC Voltage Test ..................................................... 3-7
3-8. AC Voltage Test ......................................................... 3-8
3-9. Resistance Test ....................................................... 3-8

Fluke 77 Series III Specifications

General

Diode Test	Yes
Continuity Beeper	Yes
Battery Type	9V
Safety Rating	CAT III 600V
Display	LCD, 4000 counts
Voltage DC	1000V
Voltage AC	1000V
Current DC	10A
Current AC	10A
Resistance	40 MΩ
Weight	340 g