MI 3325 MultiServicerXD
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6.2.24.1 Compensation of test leads resistance (Rlow)
This chapter describes how to compensate the test leads resistance in
Rlow
function.
Compensation is required to eliminate the influence of test leads resistance and the internal
resistances of the instrument on the measured resistance. The test leads compensation is
therefore a very important feature to obtain correct result.
symbol is displayed if the compensation was carried out successfully.
Connections for compensating the resistance of test leads
Figure 6.92: Shorted test leads
Compensation of test leads resistance procedure
Enter
R low
function.
Connect test cable to the instrument and short all test leads together, see
Touch the
key to compensate leads resistance.
Figure 6.93: Result with old and new calibration values
6.2.25 PRCD test
Figure 6.94: PRCD measurement menu
Test results / sub-results
t ∆N
……trip out time
t I∆N (+)
……trip-out time ((+) positive polarity)
t I∆N (-)
……trip-out time ((-) negative polarity)
t I∆N x1, (+)
……trip-out time (I
=I
N
, (+) positive polarity)
