3-Pole/4-Pole Measurement Of Single Earth Electrode Resistances - Fluke 1625 User Manual

Errors of the current transformer can be corrected as described in "Correcting
Clip-on Transformer Error".
3-pole/4-pole Measurement of Single Earth Electrode Re-
sistances
See Figure 12.
1625 EARTH / GROUND TESTER
START
H/C2
TEST
DISPLAY
S/P2
MENU
AC
Resistance
Earth/Ground Resistance 300 k 300 k DC Low Resistance 3k
RA R R
2 POLE
4 POLE
3 2 POLE
POLE
4 POLE 4 POLE
CHANGE
ES/P1
ITEM 3
POLE
OFF
SELECT E /C1
Figure 12. 3-pole/4-pole Measurement of Single Earth Electrode Resis-
Turn central rotary switch to position "A RE 3pole" or "A RE 4pole".
The instrument is to be wired according to picture and notices given on the
display.
A flashing of the sockets symbols EFGH or A, points to an incorrect
or incomplete connection of the measuring lead.
Fix clip-on transformer around the earth electrode to be measured.
Make sure that the clip-on transformation ratio set on the instrument corre-
sponds to the clip-on transformer used. Change settings if necessary (see
"Changing of all Data Settings with Personalised CODE")
4 Pole
Earth
electrode
tances
Earth/Ground Tester
Procedure of Measurements
Probe
>20 m
Auxiliary
earth
electrode
>20 m
edw015.eps
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