Fluke 8842A Manuals

Fluke 8842A Manuals

Manuals and User Guides for Fluke 8842A. We have 2 Fluke 8842A manuals available for free PDF download: Instruction Manual

Fluke 8842A Instruction Manual

Fluke 8842A Instruction Manual (269 pages)

Brand: Fluke | Category: Multimeter | Size: 13.88 MB

Table of Contents

Instruction Manual
1
Table of Contents
3
Title Page
15
Introduction and Specifications

15
- Introduction
  16
- The 8842A Digital Multimeter
  16
- Options and Accessories
  16
- Specifications
  17
- External Dimensions
  17
  - Introduction
    25
  - Adjusting the Handle
    26
  - Connecting to Line Power
    27
  - Installation
    27
  - Installing the Power-Line Fuse
    27
  - Introduction
    27
  - Adjusting the Handle
    28
  - Installation
    26
  - Introduction
    26
Operating Instructions

26
- Rack-Mount Kits
  28
  - Rack Mounting Kits
    28
  - Operating Features
    29
  - Power-Up Features
    29
  - Front and Rear Panel Features
    29
- Installing the Single Rack Mount Kit
  29
- Front Panel Features
  30
- Rear Panel Features
  32
- Typical Error Messages
  33
  - Display Features
    33
  - Error Messages
    33
- Error Codes
  34
  - 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
  - Overrange Indication
    37
  - Automatic Settling Time Delay
    37
  - External Trigger Input (Option -05 Only)
    37
  - Sample Complete Output (Option -05 Only)
    37
  - Making Measurements
    38
  - Input Overload Protection Limits
    38
  - Measuring Voltage and Resistance
    38
  - Measuring Current
    38
  - Current Fuse Protection
    38
  - Offset Measurements
    39
  - External Cleaning
    40
  - Measuring Voltage and Resistance
    40
  - Measuring Current
    40
Remote Programming

42
- Introduction
  44
- Capabilities
  44
- Bus Set-Up Procedure
  44
- An Overview of Remote Operation
  45
- IEEE-488 Address Selection
  45
- Remote Operation Block Diagram
  46
  - A Note about Examples
    47
  - Device-Dependent Command Set
    47
- Typical Command String
  47
- Commands Which Correspond to the Front Panel
  48
- Device-Dependent Command Set
  49
Chapter 3

50
- Bn (Offset Commands)
  50
- Cn (Calibration Commands)
  50
- Dn (Display Commands)
  50
- Fn (Function Commands)
  51
- Output Data Format
  51
  - Get Commands
    51
  - Status Data
    52
  - G0 (Get Instrument Configuration)
    53
  - G1 (Get SRQ Mask)
    53
  - G2 (Get Calibration Prompt)
    53
  - G3 (Get User-Defined Message)
    54
  - G4 (Get Calibration Status)
    54
  - G5 (Get IAB Status)
    55
  - G6 (Get YW Status)
    55
  - G7 (Get Error Status)
    55
  - G8 (Get Instrument Identification)
    56
  - N (Numeric Entry Command)
    56
  - Put Commands
    56
  - P0 (Put Instrument Configuration)
    56
  - P1 (Put SRQ Mask)
    57
  - P2 (Put Calibration Value)
    57
  - P3 (Put User-Defined Message)
    58
  - Rn (Range Commands)
    58
  - Sn (Reading Rate Commands)
    58
- Trigger Selection Logic Diagram
  59
  - Tn (Trigger Mode Commands)
    59
  - Wn (Terminator Commands)
    60
  - X0 (Clear Error Register Command)
    60
  - Yn (Suffix Commands)
    60
  - Z0 (Self-Test Command)
    60
  - Device-Clear Command)
    61
  - (Single-Trigger Command)
    61
  - Input Syntax
    61
  - Definitions
    62
  - Input Processing
    62
- Interpretation of Messages
  63
  - Syntax Rules
    64
  - Output Data
    65
  - Loading Output Data
    65
  - Types of Output Data
    66
  - Numeric Data and Error Messages
    66
    
    Measurement Data
    66
- Numeric Output Data Format
  66
  - Overrange Indication
    67
  - Error Messages
    67
  - Status Data
    67
  - Output Priority
    67
  - Service Requests
    68
  - The Serial Poll Register
    68
  - The SRQ Mask
    69
- Serial Poll Register
  69
  - Interface Messages
    70
  - Address Messages
    70
  - Universal Commands
    70
  - Addressed Commands
    71
  - Talk-Only Mode
    71
  - Remote Calibration
    72
  - Timing Considerations
    72
  - Immediate Mode Commands
    72
  - Example Programs
    73
- Immediate-Mode Commands for Various Controllers
  73
  - Example Programs
    74
- Example Program: Taking Readings with Local Control
  75
- Example Program: Using the Serial Poll Register
  76
- Example Program: Record Errors During Selftest
  77
- Example Programs: Using the IBM PC
  78
- ASCII/IEEE Std 488-1978 Bus Codes
  90
Measurement Tutorial

92
Chapter 4

93
- Introduction
  93
- DC Voltage Measurement
  93
- Circuit Loading Error
  93
- Circuit Loading Error Calculation
  93
- Input Bias Current Error
  94
- Measuring Input Bias Current Error
  94
- Resistance Measurement
  95
- 2-Wire Ohms
  95
- Wire Ohms Measurement
  95
- Correcting for Test Lead Resistance in 2-Wire Ohms
  96
- 4-Wire Ohms
  96
- Ohms Test Current
  97
- Wire Ohms Measurement
  97
  - Applications of the Ohms Functions
    98
    
    Testing Diodes
    98
    
    Testing Electrolytic Capacitors
    98
    
    A Precision Current Source
    99
  - DC Current Measurement
    99
  - Reducing Thermal Voltages
    100
- Burden Voltage Error Calculation
  100
  - Ac Voltage and Current Measurement
    101
  - True RMS Measurement
    101
  - Waveform Comparison
    101
- Waveform Comparison Chart
  102
  - 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
- Reduction of Zero-Input Error
  105
  - MAKING ACCURATE MEASUREMENTS on the 20 MV
    105
  - Making Accurate High-Resistance Measurements
    106
- Shielding for Low Voltage Measurements
  106
- Shielding for Low Resistance Measurements
  106
- Leakage Resistance in High Resistance Measurement
  107
Theory of Operation

108
Chapter 5

110
- Introduction
  110
- Overall Functional Description
  110
- Detailed Circuit Description
  111
- DC Scaling
  111
- Overall Functional Block Diagram
  112
  - VDC Scaling
    113
  - VDC Protection
    114
  - Ma DC Scaling
    114
  - Analog Filter
    114
  - Track/Hold Circuit
    115
- Track/Hold Amplifier
  115
- Track/Hold Circuit Configurations
  116
  - Track Configuration
    117
- Timing Diagram for One A/D Cycle
  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
- Ohms Scaling
  121
  - 4-Wire Ohms
    122
  - A/D Converter
    122
- Analog-To-Digital Converter
  123
  - Timing/Data Control
    124
  - Precision DAC
    124
- First Remainder-Store Period
  124
  - A/D Amplifier
    125
  - Bootstrap Supplies
    125
  - Display
    125
- Autozero Period
  125
  - Keyboard
    126
  - Digital Controller
    126
- Vacuum Fluorescent Display
  126
- Digital Controller Block Diagram
  127
  - In-Guard Microcomputer
    128
- Read/Write Timing Diagrams for Internal Bus
  129
  - Function and Range Control
    130
  - A/D Control and Computation
    130
  - Calibration Correction
    130
- Sample Rates and Reading Rates
  130
  - Keyboard/Display Control
    131
  - Troubleshooting Modes
    131
  - Guard-Crossing Communication
    131
  - Guard Crossing
    131
  - Guard Crossing Circuit
    131
  - Power Supply
    132
  - Ieee-488 Interface (Option -05)
    133
  - Out-Guard Microcomputer
    133
  - Guard Crossing
    133
  - IEEE-488 Interface Block Diagram
    133
  - Bus Interface Circuitry
    133
  - Signal Conditioning
    134
  - IEEE-488 Interface Power Supply
    134
  - True Rms Ac (Option -09)
    134
  - True RMS AC Option Block Diagram
    134
  - VAC Scaling
    134
  - Ma AC Scaling
    135
  - Frequency Response Trimming
    135
  - True RMS AC-To-DC Conversion
    135
- True RMS AC-To-DC Converter
  135
Maintenance

138
Chapter 6

140
- Introduction
  140
- Recommended Test Equipment
  140
  - Performance Test
    141
  - Diagnostic Self-Tests
    141
  - DC Voltage Test
    142
- DC Calibration Connections
  143
- DC Voltage Test
  143
  - AC Voltage Test (Option -09 Only)
    144
  - Low- and MID-Frequency AC Voltage Test
    144
  - Resistance Test
    145
- High-Frequency AC Voltage Test
  145
  - DC Current Test
    146
- Resistance Test
  146
  - AC Current Test (Option -09 Only)
    147
  - Calibration
    147
  - Basic Calibration Procedure
    148
    
    Initial Procedure
    148
- First A/D Calibration Prompt
  148
  - A/D Calibration
    149
- Calibration Functions
  149
- A/D Calibration Steps
  150
- A/D Calibration Verification Test
  150
  - Offset and Gain Calibration
    151
  - Offset and Gain Calibration Steps
    151
  - High-Frequency Ac Calibration
    152
  - Advanced Features and Special Considerations
    153
    
    Storing Variable Inputs
    153
- High-Frequency AC Calibration Steps
  153
  - Calibrating Individual Ranges
    154
  - Verifying Calibration
    154
  - Prompts When Calibrating Individual Ranges
    154
  - Erasing Calibration Memory
    155
  - Tolerance Check
    155
  - Ac Calibration at Other Frequencies
    156
  - Optimizing Use of the 5450A
    156
- Tolerance Limits
  156
  - Optimizing Use of the 5450A
    157
  - Remote Calibration
    157
- Commands Used During Remote Calibration
  158
  - Timing Considerations
    160
- Error Numbers Which Are Displayed When Commands Are Not Valid
  160
  - Remote Erasure
    161
  - Example Calibration Program
    161
  - Disassembly Procedure
    162
- Example A/D Calibration Program
  162
  - Case Removal
    163
- A Disassembly
  163
  - True RMS AC PCA Removal (Option -09 Only)
    167
  - IEEE-488 Interface PCA Removal (Option -05 Only)
    167
  - Main PCA Removal
    167
  - Front Panel Disassembly
    169
  - Reassembly Procedure
    169
  - Front Panel Disassembly
    171
- Removing the Display Window
  172
- Overall State Table
  175
- Circuitry Tested by the Analog Self-Tests
  177
  - Diagnostic Self-Tests
    178
  - Self-Test Descriptions
    179
- Self-Test Voltages
  179
  - Digital Controller Troubleshooting
    182
    
    In-Guard Microcomputer System
    182
- U202 Pin Diagram
  183
- Waveforms for In-Guard Troubleshooting Mode
  184
  - Display System
    185
- Waveforms for Display Logic
  186
  - Analog Control Signals
    188
- Keyboard Wiring
  188
- Analog Control Devices
  189
- Analog Control Logic States
  190
  - DC Scaling Troubleshooting
    191
- Typical Dynamic Control Signals
  191
- DC Scaling and Track/Hold Supply Voltages
  192
  - Track/Hold Troubleshooting
    193
  - Ohms Current Source Troubleshooting
    193
- Typical Output Waveforms for Track/Hold Circuit (TP103)
  194
  - Precision Voltage Reference Troubleshooting
    195
  - A/D Converter Troubleshooting
    196
- Output of A/D Amplifier (TP101)
  196
- Waveforms at U101-24 and U101-25
  197
- Typical Bus Data Line Waveform
  197
  - Power Supply Troubleshooting
    198
- Waveforms at TP102 for Several Inputs on 2V DV Range
  199
- Power Supply Voltages
  200
- Calculating the A/D Reading from TP102 Waveform
  200
  - IEEE-488 Interface Troubleshooting (Option -05)
    201
    
    Service Position
    201
    
    Diagnostic Program
    201
- Diagnostic Modes
  202
- Option -05 Service Position
  202
  - True RMS AC Troubleshooting (Option -09)
    203
- I/O Port Configurations
  203
  - Service Position
    203
  - Major Problems
    204
- Isolating a Defective AC Stage
  204
- AC Signal Tracing
  205
- Option -09 Service Position
  205
  - More Obscure Problems
    206
- Truth Table for U804 and K2
  206
  - Guard Crossing Troubleshooting
    207
  - Internal Cleaning
    207
  - Cleaning Printed Circuit Assemblies
    207
  - Cleaning after Soldering
    208
- Guard Crossing Test Waveforms
  208
List of Replaceable Parts

210
- Introduction
  212
- How to Obtain Parts
  212
- Manual Status Information
  212
- Newer Instruments
  213
- Service Centers
  213
- A Digital Multimeter
  214
- A Digital Multimeter
  215
- A1 Main PCA
  219
- A1 Main PCA
  222
- A2 Display PCA
  223
- A2 Display PCA
  224
- Service Centers
  227
- Service Centers (Cont)
  228
Options and Accessories

230
Chapter 8

232
- Accessories
  232
- Introduction
  232
- Options
  232
  - Accessories
    233
  - Rack-Mount Kits (Y8834, Y8835 and Y8836)
    233
  - Shielded IEEE-488 Interface Cables (Y8021, Y8022, and Y8023)
    233
  - Replacement Test Leads (TL70A)
    233
  - Deluxe Test Lead Kits (Y8134)
    233
  - Slim-Flex Test Leads (Y8140)
    233
  - Temperature Probes (80T-150U, and 80TK.)
    233
  - RF Probes (85RF and 83RF)
    233
  - Current Shunt (80J-10)
    234
  - Current Probes (Y8100, Y8101, 80I-400 and 80I-600)
    234
  - High Voltage Probes (80K-6 and 80K-40)
    234
  - 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
- Installing Option -05
  240
- Option -05A IEEE-488 Interface PCA
  242
- IEEE-488 Interface PCA
  243
Option -09 True RMS AC

244
- Introduction
  246
- Installation
  246
- Operating Instructions
  247
- Maintenance
  247
- List of Replaceable Parts
  247
- Installing Option -09
  248
- Option -09 True RMS AC PCA
  249
- True RMS AC PCA
  250
Schematic Diagrams

252
- Main PCA, DC Scaling and F/R Switch
  254
- Main PCA, A/D Converter
  256
- Main PCA, Ohms Current Source
  258
- Main PCA, Digital
  260
- Main PCA, Power Supply
  262
- Display PCA
  264

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Fluke 8842A Instruction Manual

Fluke 8842A Instruction Manual (191 pages)

Brand: Fluke | Category: Multimeter | Size: 10.07 MB

Table of Contents

Digital Multimeter
1
Instruction Manual
1
Table of Contents
2
Introduction and Specifications
14
- Introduction
  15
- The 8842A Digital Multimeter
  15
- Options and Accessories
  15
- Specifications
  16
External Dimensions
16
- Introduction
  25
- Connecting to Line Power
  26
- Installation
  26
- Installing the Power-Line Fuse
  26
- Introduction
  26
Operating Instructions
25
Line Voltage Selection Settings
26
- Adjusting the Handle
  27
- Rack Mounting Kits
  27
Chapter 2

27
- Installation
  27
- Operating Features
  28
- Power-Up Features
  28
- Front and Rear Panel Features
  28
- Installing the Single Rack Mount Kit
  28
- Front Panel Features
  29
- Rear Panel Features
  31
  - Display Features
    32
  - Error Messages
    32
- Typical Error Messages
  32
- Error Codes
  33
  - Overrange Indication
    34
  - Diagnostic Self-Tests
    34
  - Ranging
    34
    
    Autorange
    34
    
    Manual Range
    35
  - Triggering
    35
    
    Continuous Trigger Mode
    35
    
    External Trigger Mode
    35
  - Reading Rates and Noise Rejection
    35
  - Automatic Settling Time Delay
    36
  - External Trigger Input (Option -05 Only)
    36
  - Sample Complete Output (Option -05 Only)
    36
  - Overrange Indication
    36
  - Making Measurements
    37
  - Input Overload Protection Limits
    37
  - Measuring Voltage and Resistance
    37
  - Measuring Current
    37
  - Current Fuse Protection
    37
  - Offset Measurements
    38
  - External Cleaning
    39
- Measurement Tutorial
  41
Chapter 4

42
- Introduction
  42
- DC Voltage Measurement
  42
- Circuit Loading Error
  42
- Input Bias Current Error
  43
- Resistance Measurement
  44
- 2-Wire Ohms
  44
- Correcting for Test Lead Resistance in 2-Wire Ohms
  45
- 4-Wire Ohms
  45
- Ohms Test Current
  46
  - Applications of the Ohms Functions
    47
    
    Testing Diodes
    47
    
    Testing Electrolytic Capacitors
    47
    
    A Precision Current Source
    48
  - DC Current Measurement
    48
  - Reducing Thermal Voltages
    49
  - Ac Voltage and Current Measurement
    50
  - True RMS Measurement
    50
  - Waveform Comparison
    50
  - Waveform Comparison Chart
    51
  - Crest Factor
    52
  - AC-Coupled AC Measurements
    52
  - Combined AC and DC Measurements
    53
  - Bandwidth
    53
  - Zero-Input VAC Error
    53
  - MAKING ACCURATE MEASUREMENTS on the 20 MV and 20Ω RANGES
    54
  - MAKING ACCURATE MEASUREMENTS on the 20 MV
    54
  - And 20Ω Ranges
    54
  - Making Accurate High-Resistance Measurements
    55
- Leakage Resistance in High Resistance Measurement
  56
- Theory of Operation
  57
Chapter 5

59
- Introduction
  59
- Overall Functional Description
  59
- Detailed Circuit Description
  60
- DC Scaling
  60
- Overall Functional Block Diagram
  61
  - VDC Scaling
    62
  - VDC Protection
    63
  - Ma DC Scaling
    63
  - Analog Filter
    63
  - Track/Hold Circuit
    64
- Track/Hold Circuit Configurations
  65
  - Track Configuration
    66
  - Settling Configuration
    67
  - Hold Configuration
    67
  - Pre-Charge Configuration
    67
  - Precision Voltage Reference
    67
  - Ohms Current Source
    68
  - Ohms Protection
    69
  - Ohms Functions
    69
  - 2-Wire Ohms
    69
- Ohms Scaling
  70
  - 4-Wire Ohms
    71
  - A/D Converter
    71
- Analog-To-Digital Converter
  72
  - Timing/Data Control
    73
  - Precision DAC
    73
  - A/D Amplifier
    74
  - Bootstrap Supplies
    74
  - Display
    74
  - Keyboard
    75
  - Digital Controller
    75
  - Digital Controller Block Diagram
    76
  - In-Guard Microcomputer
    77
- Read/Write Timing Diagrams for Internal Bus
  78
  - Function and Range Control
    79
  - A/D Control and Computation
    79
  - Calibration Correction
    79
  - Keyboard/Display Control
    80
  - Troubleshooting Modes
    80
  - Guard-Crossing Communication
    80
  - Guard Crossing
    80
  - Power Supply
    81
  - Ieee-488 Interface (Option -05)
    82
  - Out-Guard Microcomputer
    82
  - Guard Crossing
    82
  - Bus Interface Circuitry
    82
  - Signal Conditioning
    83
  - IEEE-488 Interface Power Supply
    83
  - True Rms Ac (Option -09)
    83
  - VAC Scaling
    83
  - Ma AC Scaling
    84
  - Frequency Response Trimming
    84
  - True RMS AC-To-DC Conversion
    84
- Maintenance
  87
Chapter 6

89
- Introduction
  89
- Performance Test
  90
- Diagnostic Self-Tests
  90
- DC Voltage Test
  91
- Performance Test
  91
- DC Voltage Test
  92
- AC Voltage Test (Option -09 Only)
  93
- Resistance Test
  94
- DC Current Test
  95
- AC Current Test (Option -09 Only)
  96
- Calibration
  96
- Basic Calibration Procedure
  97
  - Initial Procedure
    97
  - A/D Calibration
    98
- A/D Calibration Steps
  99
  - Offset and Gain Calibration
    100
  - High-Frequency Ac Calibration
    101
  - Advanced Features and Special Considerations
    102
    
    Storing Variable Inputs
    102
    
    Calibrating Individual Ranges
    103
    
    Verifying Calibration
    103
    
    Erasing Calibration Memory
    104
    
    Tolerance Check
    104
    
    Ac Calibration at Other Frequencies
    105
    
    Optimizing Use of the 5450A
    105
  - Remote Calibration
    106
  - Get Commands
    107
  - Error Messages
    108
    
    Timing Considerations
    109
    
    Remote Erasure
    110
    
    Example Calibration Program
    110
  - Disassembly Procedure
    111
  - Case Removal
    112
  - True RMS AC PCA Removal (Option -09 Only)
    116
  - IEEE-488 Interface PCA Removal (Option -05 Only)
    116
  - Main PCA Removal
    116
  - Front Panel Disassembly
    118
  - Reassembly Procedure
    118
  - Front Panel Disassembly
    120
- Removing the Display Window
  121
- Overall State Table
  124
- Circuitry Tested by the Analog Self-Tests
  126
  - Diagnostic Self-Tests
    127
  - Self-Test Descriptions
    128
  - Digital Controller Troubleshooting
    131
    
    In-Guard Microcomputer System
    131
- U202 Pin Diagram
  132
- Waveforms for In-Guard Troubleshooting Mode
  133
  - Display System
    134
- Waveforms for Display Logic
  135
  - Analog Control Signals
    137
- Analog Control Devices
  138
- Analog Control Logic States
  139
  - DC Scaling Troubleshooting
    140
- DC Scaling and Track/Hold Supply Voltages
  141
  - Track/Hold Troubleshooting
    142
  - Ohms Current Source Troubleshooting
    142
- Typical Output Waveforms for Track/Hold Circuit (TP103)
  143
  - Precision Voltage Reference Troubleshooting
    144
  - A/D Converter Troubleshooting
    145
- Waveforms at U101-24 and U101-25
  146
  - Power Supply Troubleshooting
    147
- Waveforms at TP102 for Several Inputs on 2V DV Range
  148
- Power Supply Voltages
  149
  - IEEE-488 Interface Troubleshooting (Option -05)
    150
    
    Service Position
    150
    
    Diagnostic Program
    150
- Diagnostic Modes
  151
  - True RMS AC Troubleshooting (Option -09)
    152
    
    Service Position
    152
    
    Major Problems
    153
- AC Signal Tracing
  154
  - More Obscure Problems
    155
  - Guard Crossing Troubleshooting
    156
  - Internal Cleaning
    156
  - Cleaning Printed Circuit Assemblies
    156
  - Cleaning after Soldering
    157
  - List of Replaceable Parts
    158
  - Introduction
    160
  - Capabilities
    160
  - Installation
    160
  - Programming Instructions
    161
  - Maintenance
    161
  - List of Replaceable Parts
    162
- Installing Option -05
  162
- Option -05A IEEE-488 Interface PCA
  164
- IEEE-488 Interface PCA
  165
- Option -09 True RMS AC
  166
  - Introduction
    168
  - Installation
    168
  - Operating Instructions
    169
  - Maintenance
    169
  - List of Replaceable Parts
    169
- Installing Option -09
  170
- Option -09 True RMS AC PCA
  171
- True RMS AC PCA
  172
- Schematic Diagrams
  174
- Main PCA, DC Scaling and F/R Switch
  176
- Main PCA, A/D Converter
  178
- Main PCA, Ohms Current Source
  180
- Main PCA, Digital
  182
- Main PCA, Power Supply
  184
- Display PCA
  186

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