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3.4
Measurement 4p
The four-pole method is recommended in the case of measurements of earth resistance of very
low values. It permits to eliminate the influence of the test leads resistance over the result of the
measurement. In order to evaluate the resistance of the ground it is recommended to use the dedicated measurement function (point 3.9).
Disconnect the tested earth electrode for the object installation.
E
ES
E
S
H
CAT IV 300V
Turn the meter on.
Set the rotational
function selector at 4P.
ES S H
Connect the current electrode driver into ground to the H socket of the meter.
Connect the voltage electrode driver into ground to the S socket of the meter.
Connect the tested earth electrode to the E socket of the meter.
Connect the ES socket to the earth electrode In question below the E cable.
The tested earth electrode as well as the current electrode and voltage electrode
should be aligned.
MRU-200 OPERATING MANUAL Version 4.6
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