
DL9120 / DL9130
Operating Instructions
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To begin the test, press and release the TEST key or select Z Auto Start
using F4.
During the test, progress is shown by the rotating progress icon. When
the test is complete, the loop measurement is shown in the primary
display and the calculated Prospective Fault Current (PFC) or
Prospective Short-circuit Current (PSC) is shown in the secondary
display.
Tip: A Line Impedance measurement is automatically made as part
of the Earth Loop Impedance test. The Line Impedance
measurement (L-N) and Prospective Short-circuit Current
(PSC) can be viewed by simply pressing function key F1,
without the need to repeat the test.
5.9 Auto RCD Test Sequence
The DL9120 / DL9130EV will only allow the RCD test to be
performed if the correct voltages are detected between line-
earth (L-PE illuminated), line-neutral (L-N illuminated) and
neutral-earth (N-PE
not
illuminated).
Potential fields from other earthing installations, large
voltages between the protective conductor and earth, large
voltage between the neutral and earth or leakage currents
in the circuit following the residual current protection device
may influence the measurement.
Equipment which is connected downstream of a residual
current protective device (RCD) may cause a considerable
extension of the operating time.
The DL9120 / DL9130EV will determine the fault voltage
that may appear on the protective conductor during the test.
If the fault voltage is greater than 25V the DL9120 /
DL9130EV will indicate >25V on the LCD, but the user may
proceed with the test. If the fault voltage is great than 50V,
this is indicated on the LCD and the test is inhibited.
The Auto test is used to automatically perform a sequence of RCD trip
time tests with a single press of the TEST key. Each time the RCD trips,
the sequence will automatically continue once the RCD is reset.
Functions keys F1-F4 have are used to select the options below: