5
Contents
Safety
Symbols 3
WARNINGS
4
Chapter 1 General Information
Introduction
6
Manual
Description
6
Instrument Description
7
Safety
Considerations
7
Instrument Identification
7
Chapter 2 Unpacking and Installing
Inspection
8
Power
Requirements
8
Installation
8
Chapter 3 Specifications
Range / Resolution / Test Current
10
Accuracy
10
Temperature
10
General Specifications
10
Power
Specifications
11
Physical Specifications
11
Chapter 4 Optional Equipment
Available
Options
12
Test
Leads
12
Interface 13
Chapter 5 Operations
General 14
Front
Panel
14
Rear
Panel
14
4-Wire Resistance Measurements
15
Connections
16
Interpreting the Display
16
Chapter 6 Theory of Operation
General 17
Troubleshooting
17
Circuit
Descriptions
18
Power
Supplies 18
Constant Current Source
19
Transconductance Amplifier
20
Analog to Digital Converter
20
LED
Display
21
Chapter 7 Routine Maintenance
General 22
Required Test Equipment
22
Calibration
Procedure
23
Battery Replacement Instructions
24
Chapter 8 Interface Operations
BCD
Output
25
Chapter 9 Addendums
Addendums
26
Chapter 10 Parts List
Main Board Assembly
28
Display Board Assembly
30
Chassis & Final Assembly
31
Option BCD Assembly
32
Chapter 11 Schematics & Drawings
33
4021-070 1 of 4
a
4021-070 2 of 4
b
4021-070 3 of 4
c
4021-070 4 of 4
d
4021-071 1 of 1
e
2053-76
f
4021-080 1 of 1
g
4021-700 1 of 1
h
4021-701 1 of 1
i
