Measurement Of Soil Resistivity - Fluke 1625 User Manual

3. Call display R
4. Implement compensation with "START TEST" button.
The compensation resistance is displayed only for as long as the "START
TEST" button is kept pressed. After releasing the "START TEST" button the
measured value is stored and the measuring instrument returns to the standard
settings at the beginning of the measurement so that a succeeding measurement
of the earthing resistance can be implemented by pressing "START TEST"
again. Thereafter, R
If the compensation value has to be reset to the basic setting (0.000 ), the
compensation sequence has to be implemented with an open (disconnected)
measuring lead or turn the switch to the next position and back.

Measurement of Soil Resistivity

The soil resistivity is the geological and physical quantity for calculation and
design of earthing systems. The measuring procedure applied below uses the
method developed by Wenner (F.Wenner, A method of measuring earth resis-
tivity; Bull. National Bureau of Standards, Bulletin 12 (4), Paper 258, S 478-
496; 1915/16).
1625 EARTH / GROUND TESTER
START
TEST
DISPLAY
MENU
AC
Resistance
Earth/Ground Resistance 300k 300 k
RA R
2 POLE
4
POLE
3
POLE
4
POLE
CHANGE
ITEM 3
POLE
OFF
SELECT
Figure 16. Measurement of Soil Resistivity
with "DISPLAY MENU" button.
K
is subtracted from the actual measured value.
K
H/C2
S/P2
DC Low Resistance 3k
R
2 POLE
4
POLE
ES/P1
E /C1
Earth/Ground Tester
Procedure of Measurements
edw020.eps
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