Sonel MPI-536 - Soil Resistivity; Settings of Measurements

MPI-536 – USER MANUAL
58
3.7 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-wire 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.
3.7.1 Settings of measurements
Select item Ωm.
 Touch the parameter drop-down
menu Un (measuring voltage
selection).
 Select the required measuring
voltage from the list.
Select Limit to set the soil resis-
tivity limit.