Electrical Installation Tester
Making Measurements
25
apx033f.eps
Figure 11. Display After Zeroing
4. Press and release T. Wait for the test to complete.
5. The primary (upper) display shows the loop
impedance.
6. To read the Prospective Fault Current, press the 3
key and select l
K
. The PFC appears in amps or
kiloamps in the secondary (lower) display.
Note
Errors may occur due to preloading the circuit
under test.
Earth Resistance Testing by Loop Method
You can also use the tester to measure the earth
resistance component of the total loop resistance. Check
your local regulations to determine if this method is
acceptable in your area. You can use three leads or the
mains cord to perform this test. Use the connection shown
in Figure 12 when making a 3-wire connection for earth
resistance loop test.
L
N
PE
PE (Green)
L (Red)
N (Blue)
apx024f.eps
Figure 12. 3-Wire Connection for Earth Resistance
Loop Test
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