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4500
AEMC 4500 User Manual
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Digital Ground Resistance T
ester Model 4500
7
2.2
Detaching the Cover
T
o detach the cover from the case, apply downward pressure to the rear
portionofthecoverwhilegrippingitrmly
.
T
o
re-attach
the
cover
,
t
the
hinges
into
the
respective
housings
and
apply strong rear-to-front pressure to the cover until it snaps into place.
F
F
Unhinging
Supporting Point
Figure 2
8
10
Table of Contents
Default Chapter
3
Table of Contents
3
1 Introduction
5
International Electrical Symbols
6
Receiving Your Shipment
6
Ordering Information
6
Accessories and Replacement Parts
6
2 Product Features
8
Description
8
Detaching the Cover
9
Control Features
10
3 Specifications
11
Electrical Specifications
11
Accuracy
12
Table Of Influencing Parameters
13
Influence Of Stray Voltage
14
Influence Of Auxiliary Resistances
14
Mechanical Specifications
15
Safety Specifications
16
4 Operation
17
Grounding Electrode Resistance
17
Effect of Electrode Size/Depth on Resistance
19
Effects of Soil Resistivity on Electrode Resistance
20
Factors Affecting Soil Resistivity
20
Effect of Ground Electrode Depth on Resistance
23
Ground Resistance Values
24
Ground Resistance Testing Principle
26
Position of Auxiliary Electrodes in Measurements
27
Measuring Resistance of Ground Electrodes
28
Auxiliary Electrode Spacing
30
Ground Resistance Measurement Procedures
31
Over-Range Indication
32
Incorrect Measurements
32
2-Point Measurement (Simplified Measurement)
32
Continuity Measurement
33
Soil Resistivity Measurements
34
Soil Resistivity Measurement Procedure (4-Point)
35
Multiple Electrode System
38
5 Maintenance
40
Warning
40
Power Supply
40
Testing Battery Voltage
40
Average Operating Time
40
Recharging Built-In Battery
41
Power Supply From External Battery
41
Replacing Battery
41
Changing the Supply Voltage (110/220V AC )
42
Replacing the Supply Fuse
43
Replacing the Safety Fuse
43
Cleaning
44
Storage
44
Repair and Calibration
45
Technical and Sales Assistance
45
Limited Warranty
46
Warranty Repairs
46
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AEMC 4500 Specifications
General
Brand
AEMC
Model
4500
Category
Measuring Instruments
Language
English
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