EN-8
Press the “Press to Test” button. The value of loop
impedance will be displayed with the appropriate units.
A bleep will sound on completion of the test.
For best results always test on the lowest possible
range.
No harm will be done to the instrument by selecting too
low a range.
5-3 External Earth Probe
The phase earth loop impedance of exposed metal of
bonding, portable appliances or metal conduit etc., can
be tested using the external earth probe provided.
Connect the unit to the socket as normal. Plug the
external earth probe into the instrument. This breaks
the earth continuity at the socket and the P-E lamp
should go out. When the probe is connected to any
other earth point the P-E lamp should light up.
The point at which the probe is connected becomes the
earth point (instead of at the socket).
