Ground Resistance Testers Models 6422 & 6424
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2.3.4 Measurement Average (Model 6424)
After completing the measurement made with the S rod at 62 % of the distance
between the H rod and the grounding electrode, press
to store the value in
memory.
1. Place the S rod at 72 % of the distance d and take another measurement.
2. Press
to store the measurement.
3. Place the S rod at 52 % of d, and take another measurement.
4. Press
to store the measurement.
The instrument immediately calculates and displays the average of the three
measurements and the percent difference between the lowest and highest
values. For the measurement to be valid, the difference must not exceed 5 %. If
it is, place the H electrode out further and repeat the tests at the 52 %, 62 %, and
72 % distances.
Press
for > 2 seconds to erase the stored measurements.
