Fluke 87 V/AN, Руководство по обслуживанию

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Table of Contents
Title Page
Introduction ....................................................................................................... 1
Contacting Fluke ............................................................................................... 1
Unpacking the Meter......................................................................................... 2
Inspection...................................................................................................... 2
Inspection Interval ........................................................................................ 2
Preparations for Use.......................................................................................... 2
Precautions and Safety Information .................................................................. 2
Electrical Symbols ............................................................................................ 4
Specifications .................................................................................................... 5
General Specifications .................................................................................. 5
Detailed Specifications ................................................................................. 5
Theory of Operation .......................................................................................... 9
Functional Block Diagram............................................................................ 9
Power Supply and Voltage Reference .......................................................... 10
Function Selection and Overload Protection ................................................ 11
Analog Signal Conditioning ......................................................................... 13
VAC.......................................................................................................... 13
VDC.......................................................................................................... 14
mVDC ...................................................................................................... 14
Temperature.............................................................................................. 14
Ohms Below the 6 M
Ω
Range.................................................................. 14
Ohms in the 6 M
Ω
& 50 M
Ω
Range and Siemens in the 60 nS Range.... 15
Continuity in all Ohms and the Siemens Ranges...................................... 15
Capacitance............................................................................................... 15
Diode Test ................................................................................................ 15
mA,
µ
A and AAC..................................................................................... 15
mA,
µ
A and ADC..................................................................................... 16
Active Filter .................................................................................................. 16
800 Hz Low Pass Filter................................................................................. 16
RMS to DC Converter .................................................................................. 16
Analog to Digital Converter ......................................................................... 17
Secondary Analog Circuits ........................................................................... 17
Keypad .......................................................................................................... 17
Microprocessor & Support Circuits .............................................................. 18
LCD .............................................................................................................. 18