AEMC 4500 - Page 37

Digital Ground Resistance Tester Model 4500 35
Forexample,ifthereadingisR=15,
ρ(resistivity)=2πxRxA
A(distancebetweenelectrodes)=450cm
ρ=6.28x15x450=42,390Ω-cm
Z
Y
X
X
v
TEST RANGETEST CURRENT
2
10
50
2
20
200
2
20
R
B
XXvYZ
AA A
DIGITAL GROUND
RESISTANCE
TESTER
MODEL 4500
Figure 19
AAA
A
A
A
Figure 20