Earth Coupling Measurement - 3-Pole (3-Point); Measurement - AEMC 6470 User Manual

DISPLAY button after a long START push:
Initial
A1= R XXXW AC
E
XXX W
A2= R
H
XXX W
A3= R
S
Optional Push
A2= U NOISE
H-E
A3= F Hz (1)
(1) If NOISE was blinking during the measurement, in State 3 NOISE is stable and the values that had been
measured during the measurement, are shown.
(2) Display shows actual readings of the external voltage and frequency.

4.6 Earth Coupling Measurement - 3-Pole (3-Point)

4.6.1

Measurement

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Coupling Coefficient: k = (RH + RL - RHL) / 2RH
Ground Resistance Tester Model 6470
First Push
XXX W AC
A1= R
E
A2= U XXX V
H-E
A3= XXX Hz
Third Push
A2= U
S-E
A3= Hz (2)
HV
R
H
Figure 4-5
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Second Push
XXX W AC
A1= R
E
A2= U V
S-E
A3= I XXX mA
H-E
Fourth Push
A2= U
H-E
A3= F Hz (2)
LV
Z
.ca
Optional Push
A2= U
S-E
A3= Hz (1)
Fifth Push
A1= R XXXW AC
E
XXX W
A2= R
H
XXX W
A3= R
S
R
L
Y
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NOISE
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