9.3. Operating instructions for LOOP and PSC/PFC
9.3.1 Initial Checks: to be carried out before any testing
1. Preparation
Always inspect your test instrument and lead accessories for abnormality
or damage:
If abnormal conditions exist DO NOT PROCEED WITH TESTING. Have the
instrument checked by Kewtech.
Operation of Function Switch
LOOP
F1 Switches measurement mode:
L-PE or L-N/L-L
F2 ATT setting (on or off)
F3
N/A
F4
N/A
PSC/PFC
F1 Switches measurement mode:
PFC or PSC
F2 ATT setting (on or off)
F3 N/A
F4
N/A
1 Operate the Power button and turn on the instrument. Turn the Function
switch and set it to either the LOOP or PSC/PFC position.
2 Insert the Test Lead into the instrument. (Fig.29)
3 Press the MODE switch(F1) and select L-N to measure Loop(L-N/L-L) or PSC
or select L-PE to measure earth loop impedance or PFC.
Display changes automatically as follows depending on the applied voltages
while LOOP(L-N/L-L) or PSC is selected.
Fig. 27
Fig. 28
Fig. 29
LOOP/PSC/PFC
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