Measurement Of Resistance - Chauvin Arnoux C.A 6423 Manual De Instrucciones

Checking the measurement
7. Note the displayed value.
8. Wait for a few moments and then re-measure.
9. Move rod S by 10% towards H, along the line between the earth point E
and the rod H. Measure and note the result.
10. From its initial position, move rod S by 10% towards E, along the line
between the earth point E and the rod H.
If the three values are of the same order of magnitude, the earth measurement is
correct. If not, increase the distance "a" and repeat the measurements.
Do not forget to reconnect the earth point after the measurement.

3.2 MEASUREMENT OF RESISTANCE

This measurement can be performed to determine the coupling resistance
between two earth points. For example, between the neutral and ground earth
points (EDF distribution).
Cut the power supply of the installations. For measurement of the
coupling resistance, disconnect the earths!
1. Short-circuit terminals S and H using the bar provided
2. Connect terminal E to the earth of the ground, and terminal H to the
earth of the neutral.
3. Press the « MEASURE » button
measurement is displayed. Check that none of the three indicators are
flashing, otherwise check the connections (see Ch. 3.4: FAULT
SIGNALS) and repeat the measurements.
2-wire resistance measurement
C.A 6423 Earth Tester
❹
.
and hold down until the
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