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Fluke Manuals
Multimeter
8506A
Instruction manual
Fluke 8506A Instruction Manual
Thermal true rms multimeter
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Instruction manual
(316 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
List of Tables
List of Illustrations
Introduction
Description
Specifications
Software Calibration
Options
Accessories
AC Voltage
Input Characteristics
Accuracy
Enhanced Mode
Normal Mode
AC+DC Coupled Modes
Operating Characteristics
Autorange Points
Operating Range
DC Voltage
DC Ratio
Operating Instructions
Shipping Information
Operating Features
Operating Notes
Controls, Indicators and Connectors
Required Hardware
Power-Up Configuration
Default Configurations
Display
Annunciators
Range Identifier
Overrage Indication
Low Input Indication
Warning Indication
Error Codes
Momentary Error Conditions
Latching Error Conditions
Interactive Programming Information
Front Panel Push Buttons
Programming Hierarchy
Measurement Parameters
Mathematic Operations
Special Operations
Measurement Terminals and Controls
Guard Selector and Guard Terminal
Function
Amps Input/Ohms Source
OHMS Selector
Rear Input Selector
Measurement Connections
Triggering
Filtering
Filter Modes
Averaging
Range
V DC and OHMS Zero
Resolution
External Reference
Remote Control
Limits
Calibration Mode
Operation
Use
Initial Turn on
Initial Set up
Measurement Instructions
AC Volts Enhanced Mode
AC Volts
AC Volts High Accuracy Mode
Applications
Remote Programming Commands
Programming Instructions
Initialization
Program Sequence
Immediate Characters
Voltage and Current Reading
Ohms Readings
Termination Characters
Clear the Command String
Execute the Command String
Command Characters
Function Command Characters
Range Command Characters
Ohms
Modifier Command Characters
Samples Per Reading Command Characters
Filter Command Characters
Trigger Command Characters
Offset Command Characters
External Reference and Scaling Command Characters
Limits and Peaks Command Characters
Control Command Characters
Output Format
The Binary Output Format
ASCII Data Output Format
Display Control
Local Lockout Control
Echo Command Characters
Line Feed Control Command Characters
Calibration Constant
External Trigger Delay Command Characters
Memory Command Characters
Store
Recall
Range Codes
Sample Codes
Function Codes
High Speed Mode
Averaging Command Characters
Binary Output Format
ASCII Output Format
Recall DC Zero
Recall Status
Additional Recall Commands
Theory of Operation
Block Diagram Description
Bus Structure
Analog Signal Flow
Controller
Background Software Process
Foreground Software Process
Controller Block Diagram
Front Panel
DC Signal Conditioner
Active Filter
Signal Conditioner Block Diagram
Active Filter Block Diagram
A/D Converter Block Diagram
Thermal True RMS Converter
Theoretical Description
System Operation
Ideal Curve
Thermal True RMS Functional Block Diagram
Front/Rear Switch Assembly
Circuit Analysis
Mnemonics
Address and Data Buses
Reset
Status Latch
Wait Logic
ACK Logic
Interrupts
Interrupt Generation Logic
Filter/External Reference
Fast R A/D Converter
Analog
Digital
Thermal True RMS Converter Module
Logic Control
Sample Mode
Mode Timing
Thermal True RMS Conversion
Hold Mode
Module Commands Logic
Decoded ID Bus Logic
Maintenance
Service Information
General Maintenance
Fuse Replacement
Test Equipment
Power Supply Settings
Module Installation
Module Removal
Module Disassembly and Reassembly
Calibration Memory Replacement
Front Panel PCB Removal
Power Supply PCB Assembly Removal
Power Supply Interconnect Assembly Removal
Installation
Performance Test
Motherboard PCB Removal
Cleaning Instructions
DC Performance Test
High Range DC Voltage Tests
Low Range DC Voltage Tests
DC External Reference Test
Connections for High Range DC Voltage Tests
Thermal True-RMS Converter Performance Test
Equipment Set-Up a
Characterization Points
110 MV Tests
Calibration Adjustments
Initial Procedure
Power Supply
Power Supply Verifications
DC Calibration
DC Signal Conditioner Adjustments
A/D Converter Calibration
A/D Zero Adjustment
Control Setting a
A/D Ladder Adjustments
Linearity Verification
Range Adjustments
Linearity Checks
AC Calibration Procedure
Thermal True-RMS Converter
Ground Equalizer Adjustment
Amplifier Zero Adjustment
Sensor Adjustment
Attenuator and Amplifier Adjustment
Low Frequency Attenuator Accuracy Test
Amplifier and Attenuator Adjustments
Attenuator Flatness Verification Test
Attenuator Flatness Verification Test Procedure
Troubleshooting
Non-Recurring Adjustments
Faulty Module Isolation
Controller Troubleshooting
Front Panel Troubleshooting
DC Signal Conditioner Troubleshooting
Active Filter Troubleshooting
Adjustment of R14
Selection of R15 or R16
A/D Converter Troubleshooting
Guarded Supply
Unguarded Supply
Power Supply Troubleshooting
Thermal True RMS Converter Module Troubleshooting
Factory Selected Component Replacement
Amplifier Offset Resistor Selection
RMS Sensor Gain Selection
Low Voltage 50 Khz Capacitor Selection
High Voltage 50 Khz Capacitor Selection
C7 Selection Values
C18 Selection Values
Selected Capacitor Ordering Information
C25 Selection Values
C26 Selection Values
List of Replaceable Parts
How to Obtain Parts
Final Assembly
A1 Display Assembly
A2 Mother Board PCB Assembly
A3 Isolator PCB Assembly
A4 Power Supply PCB Assembly
A5 Power Supply Interconnect
A6 Controller PCB Assembly
A7 Front/Rear Switch PCB Assembly
A9 Active Filter PCB Assembly
A10 Fast R2 A/D Converter Assembly
A11 Thermal True - RMS Converter Assembly
A11A1 Attenuator PCB Assembly
Option & Accessory Information
Rack Ear Mounting Assembly
High Frequency Probe
High Voltage Probe
Ohms Converter
Ohms Converter Specifications
Temperature Coefficient
Maximum Lead Resistance
Open Circuit Voltage
Ohms Measurement Connections and Guarding
Calibration
Parts List
Failure Isolation
Symptom Analysis
Timing
Voltage Measurements
Range Switch Closures
Address and Data Coding
Ohms Converter PCB Assembly
Current Shunts
Current Shunts Specifications
Current Shunt Configurations and Range Information
Current Shunts Isolation
Address and Data Field
Current Shunts Assembly
Rear Panel Access
Allowable Listen and Talk Addresses
Interface Control
Data Lines
Interface Messages
Status Request Responses
Resets
Control Register
Status Register
Message Decoder
Mode Register
Instrument Interrupts
Bit Serial Interface
Mode Selection
Baud Rate Selection
Jumper Arrangements
Bit Serial Interface Troubleshooting
Bit Serial Asynchronous Interface PCB Assembly
Parallel Interface
Personality Card Pin Definition
Personality Cards
Personality Card Location
Block Diagram Analysis
Parallel Interface Block Diagram
Data Inputs
Addressed
Data Outputs
Detailed Input Processes Description
Parallel Interface Connections
Detailed Output Processed Description
Interface Input Control Signal Timing Diagram
Input Timing Parameters
Output Timing Parameters
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Table of
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Table of Contents
Troubleshooting
Troubleshooting
140
Controller troubleshooting
148
DC Signal conditioner troubleshooting
149
Active filter troubleshooting
150
A/D converter troubleshooting
151
Guarded supply
152
Thermal True RMS Converter Module Troubleshooting
153
Bit Serial Interface Troubleshooting
245
Isolator troubleshooting
264
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