Benutzerhandbuch für Fluke Portable Multimedia Player 8842a

Fluke

Benutzerhandbuch (English)

Benutzerhandbuch

Inhaltsverzeichnis

8842A Instruction Manual
1
- Table of Contents
  3
- List of Tables
  9
- List of Figures
  11
1. Introduction and Specifications
15
- INTRODUCTION
  16
- THE 8842A DIGITAL MULTIMETER
  16
- OPTIONS AND ACCESSORIES
  16
- SPECIFICATIONS
  17
2. Operating Instructions
26
- INTRODUCTION
  27
- INSTALLATION
  27
- OPERATING FEATURES
  29
  - Power-Up Features
    29
  - Front and Rear Panel Features
    29
  - Display Features
    33
  - Error Messages
    33
  - Overrange Indication
    35
  - Diagnostic Self-Tests
    35
  - Ranging
    35
    - AUTORANGE
      35
    - MANUAL RANGE
      36
  - Triggering
    36
    - CONTINUOUS TRIGGER MODE
      36
    - EXTERNAL TRIGGER MODE
      36
  - Reading Rates and Noise Rejection
    36
  - Automatic Settling Time Delay
    37
  - External Trigger Input (Option -05 Only)
    37
  - Sample Complete Output (Option -05 Only)
    37
- MAKING MEASUREMENTS
  38
- EXTERNAL CLEANING
  40
3. Remote Programming
42
- INTRODUCTION
  44
- CAPABILITIES
  44
- BUS SET-UP PROCEDURE
  44
- AN OVERVIEW OF REMOTE OPERATION
  45
- A NOTE ABOUT EXAMPLES
  47
- DEVICE-DEPENDENT COMMAND SET
  47
- INPUT SYNTAX
  61
  - Definitions
    62
  - Input Processing
    62
  - Syntax Rules
    64
- OUTPUT DATA
  65
  - Loading Output Data
    65
  - Types of Output Data
    66
  - Numeric Data and Error Messages
    66
    - MEASUREMENT DATA
      66
    - OVERRANGE INDICATION
      67
    - ERROR MESSAGES
      67
  - Status Data
    67
- SERVICE REQUESTS
  68
- INTERFACE MESSAGES
  70
- TALK-ONLY MODE
  71
- REMOTE CALIBRATION
  72
- TIMING CONSIDERATIONS
  72
- IMMEDIATE MODE COMMANDS
  72
- EXAMPLE PROGRAMS
  73
4. Measurement Tutorial
92
- INTRODUCTION
  93
- DC VOLTAGE MEASUREMENT
  93
  - Circuit Loading Error
    93
  - Input Bias Current Error
    94
- RESISTANCE MEASUREMENT
  95
- DC CURRENT MEASUREMENT
  99
- REDUCING THERMAL VOLTAGES
  100
- AC VOLTAGE AND CURRENT MEASUREMENT
  101
  - True RMS Measurement
    101
  - Waveform Comparison
    101
  - Crest Factor
    103
  - AC-Coupled AC Measurements
    103
  - Combined AC and DC Measurements
    104
  - Bandwidth
    104
  - Zero-Input VAC Error
    104
- MAKING ACCURATE MEASUREMENTS ON THE 20 mV AND 20( RANGES
  105
- MAKING ACCURATE HIGH-RESISTANCE MEASUREMENTS
  106
5. Theory of Operation
108
- INTRODUCTION
  110
- OVERALL FUNCTIONAL DESCRIPTION
  110
- DETAILED CIRCUIT DESCRIPTION
  111
- DC SCALING
  111
  - VDC Scaling
    113
  - VDC Protection
    114
  - mA DC Scaling
    114
  - Analog Filter
    114
- TRACK/HOLD CIRCUIT
  115
  - Track Configuration
    117
  - Settling Configuration
    118
  - Hold Configuration
    118
  - Pre-Charge Configuration
    118
- PRECISION VOLTAGE REFERENCE
  118
- OHMS CURRENT SOURCE
  119
- OHMS PROTECTION
  120
- OHMS FUNCTIONS
  120
  - 2-Wire Ohms
    120
  - 4-Wire Ohms
    122
- A/D CONVERTER
  122
  - Timing/Data Control
    124
  - Precision DAC
    124
  - A/D Amplifier
    125
  - Bootstrap Supplies
    125
- DISPLAY
  125
- KEYBOARD
  126
- DIGITAL CONTROLLER
  126
  - In-Guard Microcomputer
    128
  - Function and Range Control
    130
  - A/D Control and Computation
    130
  - Calibration Correction
    130
  - Keyboard/Display Control
    131
  - Troubleshooting Modes
    131
  - Guard-Crossing Communication
    131
- GUARD CROSSING
  131
- POWER SUPPLY
  132
- IEEE-488 INTERFACE (OPTION -05)
  133
  - Out-Guard Microcomputer
    133
  - Guard Crossing
    133
  - Bus Interface Circuitry
    133
  - Signal Conditioning
    134
  - IEEE-488 Interface Power Supply
    134
- TRUE RMS AC (OPTION -09)
  134
  - VAC Scaling
    134
  - mA AC Scaling
    135
  - Frequency Response Trimming
    135
  - True RMS AC-to-DC Conversion
    135
Static Awareness
136
6. Maintenance
138
- INTRODUCTION
  140
- PERFORMANCE TEST
  141
  - Diagnostic Self-Tests
    141
  - DC Voltage Test
    142
  - AC Voltage Test (Option -09 Only)
    144
  - Resistance Test
    145
  - DC Current Test
    146
  - AC Current Test (Option -09 Only)
    147
- CALIBRATION
  147
  - Basic Calibration Procedure
    148
    - INITIAL PROCEDURE
      148
    - A/D CALIBRATION
      149
    - OFFSET AND GAIN CALIBRATION
      151
    - HIGH-FREQUENCY AC CALIBRATION
      152
  - Advanced Features and Special Considerations
    153
    - STORING VARIABLE INPUTS
      153
    - CALIBRATING INDIVIDUAL RANGES
      154
    - VERIFYING CALIBRATION
      154
    - ERASING CALIBRATION MEMORY
      155
    - TOLERANCE CHECK
      155
    - AC CALIBRATION AT OTHER FREQUENCIES
      156
    - OPTIMIZING USE OF THE 5450A
      156
  - Remote Calibration
    157
    - TIMING CONSIDERATIONS
      160
    - REMOTE ERASURE
      161
- DISASSEMBLY PROCEDURE
  162
- REASSEMBLY PROCEDURE
  169
- INTERNAL FUSE REPLACEMENT
  173
- EXTERNAL TRIGGER POLARITY SELECTION (Option -05 Only)
  173
- TROUBLESHOOTING
  173
- INTERNAL CLEANING
  207
  - Cleaning Printed Circuit Assemblies
    207
- Cleaning After Soldering
  208
7. List of Replaceable Parts
210
- INTRODUCTION
  212
- HOW TO OBTAIN PARTS
  212
- MANUAL STATUS INFORMATION
  212
- NEWER INSTRUMENTS
  213
- SERVICE CENTERS
  213
8. Options and Accessories
230
- INTRODUCTION
  232
- ACCESSORIES
  233
805. Option -05 IEEE-488 Interface
236
- INTRODUCTION
  238
- CAPABILITIES
  238
- EXTERNAL CONTROLS
  238
- INSTALLATION
  238
- PROGRAMMING INSTRUCTIONS
  239
- MAINTENANCE
  239
- LIST OF REPLACEABLE PARTS
  239
809. Option -09 True RMS AC
244
- INTRODUCTION
  246
- INSTALLATION
  246
- OPERATING INSTRUCTIONS
  247
- MAINTENANCE
  247
- LIST OF REPLACEABLE PARTS
  247
9. Schematic Diagrams
252

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269
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English

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