40
Ground Resistance Tester Model 6471
W
AUTO
Ω
m
m
H
S
ES
E
d
ρ
=
Ω
d
d
DISTANCE
3.
To modify the hundredths (of meters or feet), press the ▲ button until the
desired digit is displayed (0-9).
4.
To select and modify the tens, press the ► button and then the ▲ button until
the desired digit is displayed (0-9).
5.
To select and modify the units and tenths of a unit, press the ► button and
then the ▲ button until the desired digits are displayed (0.0-9.9).
6.
To terminate the programming of distance, press the
2nd
button and then the
DISTANCE
button.
In the case of the Schlumberger method, it is also necessary to program distance
A
. This is done in the same way as for distance
d
.
5.6.4 Wenner Method
1.
Set the switch to
.
2.
Place the 4 earth electrodes on a straight line, at a distance
d
from one an
-
other and at a depth
p < 1/20 d
. Distance
d
must be between 2 and 30m.
3.
Connect the cables to the electrodes, then to terminals
H (Z)
,
S (Y)
,
ES (Xv)
,
and
E (X)
in sequence.
4.
Program the distance into the instrument as described in § 5.6.3.
H
S
ES
E
d
d
d
p
In order to avoid electromagnetic interference, it is best to unwind the full length of
each cable from the reel, to keep the cables as far apart as possible on the ground,
www.
ShopAEMC
.com
Shop for AEMC products online at:
1.888.610.7664
