MPI-535
– BRIEF USER MANUAL
17
Transmitting clamps and measuring clamps should be attached to the tested earth
electrode
at a distance of at least 30 cm from each other.
The arrow on the clamps
can be directed in
any direction
.
Connect the transmitting
clamps N-1
to
H
and
E
socket.
Connect the
measuring clamps C-3
to the clamp socket.
Select the
clamps +
clamps
option in the
measurement menu.
Select other settings and
perform the measurement
using the
START
button.
3.4
Measuring 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 addi-
tional procedure of entering the distance between the electrodes. The measurement result is the
resistivity value, 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.
3.4.1
Settings of measurements
Select item
Ωm
.
