Chapter II
Digital Earth Tester
47
EARTH MEASUREMENTS - TYPICAL INFLUENCE OF ROD RESISTANCE
20 Ohm Range
0
5
10
15
20
25
0
2
4
6
8
10
12
14
kOhm
%
Ra = 0.3 Ohm
Ra = 10 Ohm
2000 Ohm Range
-5
0
5
10
15
20
25
0
10
20
30
40
50
60
kOhm
%
Ra = 30 Ohm
Ra = 1000 Ohm