Recommendations For A Reliable Measurement - AEMC 6470-b User Manual

5.4.3
Moving the Auxiliary Electrodes
Move electrode S (Y) towards electrode H (Z) by a distance equal to 10% of d and
make another measurement. Then move electrode S (Y) again by a distance equal
to 10% of d, but towards the earth electrode.
H (Z)
The three measurement results should be the same to within a few percent. If this
is the case, the measurement is valid.
If not, electrode S (Y) is in the zone of influence of the earth electrode. It will be
necessary to increase distance d for the H (Z) auxiliary electrode and repeat the
measurements.
Positioning of the Auxiliary Electrodes
To make sure that your earth measurements are not distorted by interference, we
recommend repeating the measurement with the auxiliary electrodes placed at a
different distance and in another direction (for example, rotated 90° from the first
alignment).
Ground Resistance Tester Model 6470-B
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Recommendations for a Reliable Measurement

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