Multifunction Tester
Measurements
33
Figure 10. Continuity Measurement Screen
If a circuit is live, the Tester inhibits the test and this message shows on the display:
W Voltage detected. Cannot start test.
Loop Impedance Measurement
Loop impedance is source impedance measured between Line (L) and Protective Earth (PE).
You can determine the Prospective Earth Fault Current (PEFC). PEFC is the current that could
potentially flow if the phase conductor is shorted to the protective earth conductor. The Tester
calculates the PEFC as the measured mains voltage divided by the loop impedance. The loop
impedance function applies a test current that flows to earth. If RCDs are present in the circuit,
they may trip. To avoid tripping, use the
function.
No Trip Mode (Low Current)
The no trip test applies a special low-current test that prevents RCDs in the system from
tripping. If you are certain no RCDs are in the circuit, you can use the Trip Mode (High Current)
function for a faster, more accurate, and less noise-sensitive test.
Note
If the L and N terminals are reversed, the Tester will auto-swap them internally and
continue the test. This condition is indicated by the terminal indicator symbols. If the
Tester is configured for UK operation, L and N will not auto-swap and the test stops.
Functions
Form
Continuity
No Limit
No project selected
To Next Page
