MPI-520 OPERATING MANUAL version 3.4
During measurements of insulation resistance, dangerous voltage up to 1 kV occurs at
the ends of test leads of MPI-520 meter.
It is forbidden to disconnect test leads and to change the position of the function
switch before completion of measurement. Failure to obey the above instruction will
lead to high voltage electric shock and make it impossible to discharge the object
tested.
- The meter emits a continuous audio signal until test voltage reaches 90% of the preset value (and
also when 110% of the preset value is exceeded).
- After completion of measurement, the capacitance of the object tested is discharged by shorting
R
ISO
+
and R
ISO
-
terminals with resistance of 100 k.
Additional information displayed by the meter
Test voltage is present on terminals of the meter.
Interference voltage occurs on the object being tested.
Measurement is possible but may be burdened with addi-
tional uncertainty.
Activation of current limit. The symbol displayed is accom-
panied by a continuous audio signal.
Wrong accessory is connected to test jack (other than WS-
03 or WS-04 or AutoISO-1000c).
WS-03 or WS-04 lead for three-lead measurements is
connected (measurement at L-PE, L-N and N-PE termi-
nals).
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