Fluke 8502A User Manual

NOTE
This manual
documents
the
Model
8502A
Digital
Multimeter
and
its
assemblies
at the
revision
levels
shown
in
Appendix
7A.
If
your
instrument
contains
assemblies
with
different
revision
tetters,
it will
be
necessary
for
you to
either
update
or
backdate
this
manual.
Refer
to
the
supplemental
change/errata
sheet
for newer
assemblies,
or
to
the
backdating
sheet in
Appendix
7A for
older
assemblies.
Instruction
Manual
P/N
471466
March
1978

Fluke 8502A Specifications

General

Type	Digital Multimeter
DC Voltage Range	0.1 mV to 1000 V
Operating Temperature	0 °C to 50 °C
Frequency Range	1 MHz
Interface	GPIB
Power Supply	100 V, 120 V, 220 V, 240 V
Display	6.5 digit

Summary

Warranty Information

Introduction and Specifications

Instrument Description

General description of the 8502A Digital Multimeter.

Options and Accessories Listing

System Specifications

General specifications for the 8502A mainframe and options.

Operating Instructions Overview

Key Operating Features

Function Selection Controls

Range Control Operations

Memory Control Functions

Modifier Control Functions

Display and Warning Information

Warning indications and error codes displayed by the instrument.

Input Terminal Interconnections

Guarding Principles and Use

Explanation of the guarding feature and its importance.

Front Panel Control Usage

Measurement Functions Explained

Explanation of the available measurement functions.

Resistance Measurement Ranges

Details on the DC voltage measurement ranges and accuracy.

Modifier Functions (Sample, Filter)

Sample Rate Configuration

External Reference Voltage Use

Memory Storage and Manipulation

Explanation of the instrument's memory capabilities.

Setting and Using Measurement Limits

Peak Value Capture and Display

Calibration Mode Procedures

Procedure for entering and using the calibration mode.

Offset Mode Operation

Using the offset mode to subtract values from measurements.

Scaling Mode Operation

Using the scaling mode to divide measurements by a factor.

Instrument Zeroing Procedures

Methods for zeroing the instrument for accurate readings.

General Operating Directions

Front Panel Control Usage Details

Sample Rate Setting

Filter Mode Selection

External Reference Input

Storing and Displaying Limits

Peak Value Recording and Recall

DC Voltage and Ohms Zeroing

Procedure for zeroing DC voltage and ohms measurements.

Offset Mode Functionality

Using the offset mode to subtract values.

Scaling Factor Storage and Use

Storing and using scaling factors.

Calibration Mode Entry

Entering and using the calibration mode.

Measurement Instructions

General instructions for performing measurements.

DC Voltage Measurement Procedure

Procedure for measuring DC voltage.

DC Zeroing Procedure

Procedure for zeroing DC measurements.

AC Voltage Measurement Procedure

Procedure for measuring AC voltage.

DC Current Measurement Procedure

Procedure for measuring DC current.

AC Current Measurement Procedure

Procedure for measuring AC current.

Resistance Measurement Procedure

Procedure for resistance measurements.

Ohms Zeroing Procedure

Procedure for zeroing resistance measurements.

Theory of Operation Overview

Block Diagram Description

Overview of the instrument's block diagram.

Bus Structure Explanation

Explanation of the instrument's bus architecture.

Guarded Bus Description

Description of the guarded bus lines and connections.

Controller Functionality

Details on the instrument's controller.

Software Program Processes

Explanation of the instrument's software processes.

Controller Module Structure

Structure of the controller module.

Software Storage and RAM Usage

Details on software storage and RAM usage.

Interrupt Handling Mechanisms

Explanation of interrupt usage in the system.

Front Panel Interface Function

The front panel as an interface.

DC Signal Conditioner Functionality

Function of the DC signal conditioner.

Active Filter Module Purpose

Purpose of the active filter module.

Fast R2 A/D Converter Analysis

Explanation of the Fast R2 A/D converter.

Analog Portion of A/D Converter

Digital Portion of A/D Converter

Circuit Analysis Introduction

Detailed Circuit Descriptions

Controller Circuit Analysis

Microprocessor Timing Analysis

Address and Data Bus Description

ACK Logic Functionality

Interrupt Handling and Prioritization

Handling of interrupts.

Interrupt Prioritization Details

Prioritization of interrupts.

Front Panel Operation and Addressing

DC Signal Conditioner Circuit Analysis

Filter/External Reference Module Analysis

Fast R2 A/D Converter Detailed Analysis

Analog A/D Converter Circuit Analysis

Digital A/D Converter Circuit Analysis