Operation Manual
MI 3121H Smartec 2,5 kV Insulation / Continuity Warnings and notes
7
Notes related to measurement functions:
General
If there is any irregular condition on input terminals then the selected measurement
can't be performed.
Insulation resistancecontinuity measurements shall be performed on de-
energized objects, i.e. voltage between test terminals should be lower than 10 V!
PASS / FAIL indication is enabled when limit is set to ON. Apply appropriate limit
value for evaluation of measurement results.
Insulation resistance
When measuring insulation resistance between installation conductors all loads
must be disconnected and all switches closed!
The instrument automatically discharge tested object after finished measurement.
Click the TEST key twice for continuous measurement.
It is recommended to use the GUARD connection when high insulation resistance
(>10G Ω) is measured. You need optional 2.5 kV 3-wire test lead.
The guard terminal is internal impedance (660 kΩ) protected.
The DAR and PI diagnostic is automatically calculated during insulation
measurements.
Continuity functions
Parallel resistance paths and interfering currents in measured circuit will influence
the test result!
If necessary compensate test lead resistance before performing continuity
measurement, see 5.2.3.
Measurement of resistance of wire wound components like transformer or motor
windings is possible only in continuous function due to great influence of the
winding inductance.