Sonel MPI-540 Brief User Manual

MPI-540 ● MPI-540-PV – BRIEF USER MANUAL
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3.5 Soil resistivity
For soil resistivity measurements – used as preparation for the designing the earthing system or
in geology measurements – a separate function is provided: measurement of soil resistivity  This
function is identical to 4-pole measurement of earth resistance, however, it contains an additional pro-
cedure of entering the distance between the electrodes. The measurement result is the resistivity val-
ue, calculated automatically according to the formula applied in Wenner method:
ρ = 2  LR
E
where:
L – distance between the electrodes (all distances must be equal),
R
E
– measured resistance.
Select item Ωm.
 Drive 4 probes into the ground in one line and at equal distances.
 Connect the probes to the meter according to the drawing above.
 Call up the measurement
menu.
 Select other settings and per-
form the measurement using
the START button.

Sonel MPI-540 Specifications

General

Brand	Sonel
Model	MPI-540
Category	Measuring Instruments
Language	English