Fluke 43B Service Manual

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Table of Contents
Chapter Title Page
1 Safety Instructions ............................................................................. 1-1
1.1 Introduction................................................................................................. 1-3
1.2 Safety Precautions....................................................................................... 1-3
1.3 Caution and Warning Statements................................................................ 1-3
1.4 Symbols....................................................................................................... 1-3
1.5 Impaired Safety ........................................................................................... 1-4
1.6 General Safety Information......................................................................... 1-4
2 Characteristics ................................................................................... 2-1
2.1 Introduction................................................................................................. 2-3
2.2 Safety Specifications................................................................................... 2-3
2.3 Function Specifications............................................................................... 2-4
2.3.1 Electrical functions.............................................................................. 2-4
2.3.2 Scope.................................................................................................... 2-5
2.3.3 Meter.................................................................................................... 2-7
2.3.4 Record.................................................................................................. 2-7
2.4 Miscellaneous ............................................................................................. 2-8
2.5 Current Probe .............................................................................................. 2-8
2.6 Environmental Conditions .......................................................................... 2-9
2.7 Electromagnetic Immunity.......................................................................... 2-10
3 Circuit Descriptions ........................................................................... 3-1
3.1 Introduction................................................................................................. 3-3
3.2 Block Diagram ............................................................................................ 3-3
3.2.1 Input 1 - Input 2 Measurement Circuits............................................... 3-3
3.2.2 Trigger Circuit ..................................................................................... 3-5
3.2.3 Digital Circuit ...................................................................................... 3-5
3.2.4 Power Circuit....................................................................................... 3-6
3.2.5 Start-up Sequence, Operating Modes .................................................. 3-7
3.3 Detailed Circuit Descriptions...................................................................... 3-9
3.3.1 Power Circuit....................................................................................... 3-9
3.3.2 Input 1 - Input 2 Measurement Circuits............................................... 3-14
3.3.3 Trigger Circuit ..................................................................................... 3-20

Fluke 43B Specifications

General

Category	Power Quality Analyzer
Interface	RS-232
Volts AC/DC	Yes
Ohms	Yes
Continuity	Yes
Diode Test	Yes
Capacitance	Yes
Harmonics Measurement	Up to 51st harmonic
Display	LCD
Battery Life	Approximately 6 hours
Weight	1.1 kg (2.4 lb)
Data Storage	Yes
Amps AC/DC	0.1 to 1000 A (with clamp)
Power Measurement	W, VA, VAR, PF
Dimensions	50 mm
Current Measurement Range	Via current clamp accessories (not built-in)