Full Method - AEMC 6470-b User Manual

To measure the resistances of auxiliary electrodes H (Z) and S (Y), or if the resis-
tance of the electrodes is too high (see § 10.1), start the measurement with a long
press of the START/STOP button.
R , R will be displayed.
H S
NOTE: Repeat the process at 52% and at 72% for the S electrode.
5.4.2

Full Method

A more thorough measurement can be obtained by taking measurement by mov-
ing the S (Y) auxiliary electrode every 10% between H (Z) and E (X) and plotting
the results. A distinct plateau should result as shown below.
0
Take the average of the 3 or 4 readings on the
plateau to obtain the earth electrode resistance.
30
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R30 R40
R20
R10
10 20 30 40
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EARTH
H
S
E
R70
R50 R60
50 60 70
% H - E
R =
Ground Resistance Tester Model 6470-B
Ω
kΩ
kΩ
AUTO
R90
R80
80 90 100
R40 + R50 + R60 + R70
4
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