OPERATING MANUAL MIC-2501 version 1.04
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Additional information displayed by the meter
Test voltage is present on terminals of the meter
.
NOISE!
Interference voltage higher than 25V but lower than 50V, is present
on the tested object. Measurement is possible but may be bur-
dened with additional uncertainty.
READY
disappears, LED
lights red, two-tone beep
Interference voltage higher than 50 V, is present on the tested ob-
ject. The measurement is blocked.
LIMIT I!
Activation of current limit. The symbol displayed is accompanied by
a continuous beep.
Breakdown of the tested object insulation, the measurement is in-
terrupted. The message appears after displaying
LIMIT I!
for 20 s
during the measurement, when the voltage previously reached the
nominal value.
, R
ISO
LED is
blinking in red and two-
tone acoustic signal is
generated
During the measurement, AC voltage appeared or the object can-
not be discharged for 30 seconds.
Immediately
disconnect the test
leads.
4.1.2 Three-lead measurement
In order to eliminate the influence of surface resistance in transformers, cables, etc. the three-
lead measurement is used. For example:
at the measurement of inter-winding resistance of a transformer,
G
socket of the meter should be
connected to the transformer tank;