Sonel MPI-540 User Manual

MPI-540 – USER MANUAL
51
R
H
– resistance of current elec-
trode
R
S
–
resistance of voltage elec-
trode
δ – additional uncertainty caused
by resistance of the electrodes
Selecting the bar hides the
menu.
Save the measurement to the meter memory using the icon. A detailed description of
memory management is contained in section 5.1.3.
The last measurement can be recalled using the icon.
Repeat the steps for two
additional locations of the voltage
electrode S:
 located at a certain distance
from the tested earth electrode,
 moved closer by the same dis-
tance to the tested electrode.
This is done to confirm that the S
electrode was driven into the ref-
erence earth. If so, the difference
between the value of R
E
between
the main measurement and each
additional measurement should
not exceed 3%.
If R
E
measurement results differ
from one another by more than
3%, the distance of the current
electrode from the earth electrode
being tested should be consid-
erably increased and the meas-
urements should be repeated.
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 50 V it is signalled as hazardous. The meter must not be connected to
voltages exceeding 100 V.

Sonel MPI-540 Specifications

General

Brand	Sonel
Model	MPI-540
Category	Measuring Instruments
Language	English