8
5
Note:
This test is only performed after the instrument has first
proved that the wiring is connected correctly (i.e. All
correct wiring indicators are continuously green.
While the voltage is being checked, the two outer red LED’s of
the voltage indicator will be briefly illuminated. On completion of
the check, the actual voltage range will be indicated by the
appropriate LED as shown in Figure 4 below. The supply
voltage can be considered correct if the centre green LED is lit,
indicating a voltage between 207 & 253 V AC. Other voltage
range indications should be investigated accordingly.
Figure 4.
4.3 Earth - Loop Test.
After confirming correct voltage, press and release the Earth
Loop Test Switch Button. The outer two (<1
W
& >200
W
) LED’s
of the Earth Loop Indicator (See Figure 5) will illuminate briefly
while the test is being undertaken. On completion of the test, the
LED indicating the measured Earth-Loop Impedance will remain
illuminated.
Figure 5.
3.2 Top View
Figure 2.
The top of the instrument (see Figure 2) incorporates an IEC
type connector that is used to connect the test leads (supplied)
to the unit.
3.3 Test Leads.
Figure 3a Test Lead with 13 Amp Plug
Figure 3b Test Lead with 3 separate probes
Two test leads are supplied with the instrument (see Figure
3a & 3b). Both incorporate an IEC connector at one end,
which connects to the socket on the top of the instrument.
One test lead has a UK style 3 pin plug at the other end,
which can be