AEMC 4500 - 2 Product Features; Description

6 Digital Ground Resistance Tester Model 4500
CHAPTER 2
PRODUCT FEATURES
2.1 Description
The Digital Ground Resistance Tester Model 4500 is a rugged, easy-to-
usetesterwhichisspecicallydesignedformeasuringverylowresistance
onlargegroundingsystems(groundgrids,groundmats),evenunderdif-
cultconditionssuchashighstraycurrentsorexcessiveauxiliaryelectrode
resistance.
This high performance instrument is capable of measuring up to 20kΩ,
anddirect readingwith aresolution of1 milliohmis possible.Theextra
large 3½ digit LCD display minimizes the possibility of operator reading
error,anddualindicators(blinkingdisplayandarrow)warntheoperator
whenexcessstraycurrentorauxiliaryelectroderesistanceispresent,or
when there is a lack of continuity between leads and electrodes. A beeper
notiestheuserifavoltagegreaterthan20Vpeakispresentbetweenthe
terminals X and Y or X and Z when the ground leads are connected.
The Model 4500 can be used to perform soil resistivity measurements with
the four-point method by using the high 20kΩ range and is designed in a
sturdy, dust and water-resistant carrying case with a detachable cover.
Carrying
Handle
Snaps for Closing Cover
Protective Cover
Case for
Papers
Compartment
for Leads and
Hex Key
X
X
Z
Y
v
B
A
TTER
Y
C
HAR
G
E
B
LINK
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DIS
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LA
Y
A
ND
P
OIN
TER
INDI
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ATE
EX
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SS
IVE
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ANSI
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ELEC
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NCE
EX
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RNAL
1
2
V
TE
ST
RANGE
TES
T CURRENT
DIGITAL GROUND
RE
SISTANCE
TE
STER
MODEL 4500
mA
2
10
50
Ω
kΩ
2
20
200
2
20
5
0
/60/4
0
0
Hz
_
1
1
0V
!
BEE
P
ER
INDI
C
ATES
HI
GH
GROU
ND VOLTAGE
AEMC
IN
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Figure 1