EN-7
V.
OPERATING INSTRUCTIONS
5-1 Correct Wiring
Before pressing the “Test Button” always check the P-E,
P-N, neon lamps for the following light sequence :
P-E Neon must be ON
P-N Neon must be ON
Neon must be OFF
If the sequence of lights is not as above DO NOT
PROCEED with further testing.
The wiring at the socket must be checked.
If the
neon is ON there is reversed phase and neon is ON
there is reversed phase and neutral wiring.
5-2 Measurement of the Loop Impedance
Set the instrument to the 200
Ω
or 2000
Ω
range.
If the instrument is set to the 20
Ω
range slight sparking
may occur when testing with the external earth probe
although the unit has been designed to minimize this.
Connect the lead to the instrument.
Plug the mounded mains plug to the socket being
tested.
Check the neons are lit as indicated in section 5-1.
If not DO NOT PROCEED – check wiring.
Note the mains voltage if required.
