Measuring Techniques - Continuity Testing - Megger DET2/2 Guide De L'utilisateur

Measuring Techniques - Continuity Testing

DET 2/2 can be used to measure metallic resistances
of low inductance or capacitance. To test the continuity
of conduit or other earth conductors the instrument can
be connected as shown. Ensure that the circuit is de-
energised, before connecting the instrument for
measurement.
Note:- Due to the inherent high accuracy of the
instrument and the low continuity resistance to be
measured, contact resistance between the test lead
clips and the conduit becomes a factor in the measured
value. Contact resistance should therefore be kept as
low as possible.
1) Firmly short together terminals 'P2' and 'C2'.
2) Firmly short together terminals 'P1' and 'C1'.
3) Firmly connect a test lead to 'P2 and C2',and the
other test lead to 'P1' and 'C1'.
4) Firmly connect the free ends of the test leads
across the isolated circuit under test.
5) Press the Test push, and take a reading in the
normal way.
The resistance of the two test leads can be found by
firmly joining their free ends together, pressing the
Test push and taking the reading in the usual way. Test
lead resistance can then be subtracted from the original
reading, to give a 'true' value of continuity resistance.
Continuity testing.
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