MPI-525
– USER MANUAL
33
Remarks:
During measurements of insulation resistance, dangerous voltage up to 2,5 kV
present at the ends of test leads of MPI-525 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).
- If any of the measured values of partial resistance is out of range, the value of the absorption coefficient
is not displayed
– the display shows dashes.
- 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
.
- Periods t1, t2 and t3 can be choose from the range of 1...600s.
Additional information displayed by the meter
Test voltage is present on terminals of the meter
.
NOISE!
Interference voltage occurs on the object being tested.
Measurement is possible but may be burdened with addi-
tional uncertainty.
LIMIT I!
Activation of current limit. The symbol displayed is accom-
panied by a continuous audio signal.
3.6.2 Measurements with AutoISO-2500 adapter
Set the rotary switch of function selection at
R
ISO
position.
Connect AutoISO-2500 adapter.
The meter detects this fact auto-
matically and changes the appear-
ance of the screen.
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