10
Ω
10 m
10 m
4.5 V
P C
5
〜
10 ｍ
5
〜
10 ｍ
5 ｍ
[4] OPERATION
1. Arrangement of Auxiliary Earth Bars and Connections
As shown in Figs.1 and 2, the auxiliary bars are arranged parallel
to the earth (E) at intervals of 5
〜
10 meters. Where it is impossible
to align them parallel, a certain amount of bending (
E , P
(S)
C
(H)
≧
120
゜
) is allowed.
When the nets are used instead of the bars, the R
P
(R
S
) and
R
C
(R
H
)at the earth poles read larger. Normally, the impedance of
the power supplying constant AC current to E-C
(H)
is high enough
to prevent reading errors due to a slight increase of resistance.
However, when the nets are used on a concrete surface, wet them
to enable better contact with the ground. Measurement is not
possible on asphalt surfaces. Once the bars have properly set,
make connections as illustrated.
Take extra care not to drop the earth bars or pierce anything
with them when carrying them or inserting them into the
ground. The tips of the earth bars are very sharp.
WARNING
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