MPI-535
– BRIEF USER MANUAL
14
3.3
Measurement of resistance to earth
WARNING
Measurement of resistance to earth may be carried out if voltage of interfer-
ences does not exceed 24 V. Voltage of interferences is measured up to the
level of 100 V.
Over 50V it is signalled as hazardous. The meter must not be connected to
voltages exceeding 100 V.
3.3.1
Settings of measurements
Select item
R
E
.
3.3.2
Measurement of resistance to earth using 3P method
The three-pole measuring method is the basic type of resistance to earth measurement.
Disconnect earth electrode being tested from the installation of the building.
Drive the
current
electrode into the ground and connect to the
H
socket of the meter.
Drive the
voltage
electrode into the ground and connect to the
S
socket of the meter.
The
earth electrode
being tested should be connected to
E
socket of the meter.
It is recommended that the tested
earth electrode
as well as
H
and
S
electrodes should be
located along one line and at relevant distances, in accordance with the rules of earth
measurements.
