Amprobe GROUND PROBE GP-1 Manuel de l'utilisateur - Page 13
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Electrode Resistance:
Test C & D
C1
13)Remove P2 (RED) from the 52% rod and clip to the 72% rod.
14)Press and release the START button.
15)Note the value of Rg, or press the SAVE button.The value of Rg will be saved to the next
available memory location. Note the memory location.
16)The electrode resistance is equal to point P2 @62%. Points P2 @52% and P2 @72%
are used to confirm the accuracy of the measurements.
The rule of thumb is that in order to perform an accurate measurement, the difference in
resistances between points marked as P(62%) and P(52%) as well as between points
P(72%).
To compute differences use following Formula 2:
Formula 2
(P2 @62%) - (P2 @52%) x 100% < ± 10%
(P2 @62%)
(P2 @72%) - (P2 @62%) x 100% < ± 10%
(P2 @62%)
(cont'd.)
BLUE
BLACK
P1
52%
62%
RED
GREEN
P2
C2
72%
100%
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