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3Lo – A 3-wire low current loop impedance test. This test requires all three connections.
Where to use:
For making L-E measurements on circuits where all three conductors are available AND the Phase – Earth circuit is RCD protected.
REQUIRES ALL THREE TEST LEADS TO BE CONNECTED
2Hi – A 2-wire high current test. A fast 3-4 second test using high test currents.
Where to use:
On ALL circuits except Phase – Earth measurements on RCD protected circuits.
2Lo – A 2-Wire low current loop test for L-E measurements where the 3rd conductor in not available.
Where to use:
On RCD protected circuits where access to all three conductors is not possible
Note: 2Lo is not available when all three leads are connected, as the 3Lo is the preferred measurement mode.
Selecting the test mode:
To switch between Loop test modes press the Function <-> button, as below:
Press the function key <-> to
change between 3Lo, 2Hi and
2Lo
The test mode is displayed as below:
Default mode 1st Press 2nd Press
Note: RCDs can still trip when performing a “non-trip” loop test if there is an existing high level of fault current flowing in the Earth
conductor, or the RCD is not operating within specification.
7.1.2 L-N or L-L circuits:
L-N (or L-L) Selected Test performed
L1
N
E
Test options in L-N (L-L) mode
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