Sonel MPI-540 User Manual

MPI-540 – USER MANUAL
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3.1 Diagnostics performed by the meter – limits
The meter is able to assess whether the measurement result is within acceptable limits for the se-
lected safety device or the limit value The user may set a limit, the threshold value which should not
be exceeded by the result. It is possible for all measurement functions except for:
 RCD measurements (I
A
, t
A
) for which the limits are permanently enabled,
 fault loop measurements, where the limit is determined indirectly by selecting a suitable
overcurrent protection for which standard limits are assigned,
 the recorder.
For the measurements of insulation resistance and light the limit is the minimum value. For meas-
urements of fault loop impedance, earth resistance, resistance of protective conductors and equipo-
tential bonding - it is the maximum value.
The limits are set in the relevant measurement menu. After each measurement the meter dis-
plays the symbols:
the result is within the set limits,
the result is outside the set limits,
assessment of the result correctness not possible. The symbol is displayed, when for exam-
ple the result is not available (e.g. measurement in progress, or no measurement has been
performed)
the method for setting limits is described in the sections describing the measurement data.
3.2 Measurement of alternating voltage and frequency
The meter measures and displays alternating voltage and network frequency in the selected
measurement functions in accordance with the table below.
Measuring function
U
F
Z
L-N


Z
L-PE


Z
L-PE[RCD]


R
ISO

RCD I
A


RCD t
A


R
x
R
CONT
Phase sequence

Motor rotation

Resistance-to-earth R
E

Soil resistivity

Illuminance
Recorder



Sonel MPI-540 Specifications

General

Brand	Sonel
Model	MPI-540
Category	Measuring Instruments
Language	English