Multifunction Tester
Measurements
35
5. Select L-PE.
6. Connect and zero the test leads or mains line cord. For more information, see How to Zero
the Test Leads.
7. Tap Zmax to toggle the option on or off.
If Zmax is turned on, consecutive measurements are compared. The display shows the
maximum Z
L
(or Z
I
for L-N) value until Zmax is turned off.
8. Connect all three leads to the L, PE, and N of the system under test or plug the mains test
cord into the socket under test.
9. Tap
H.
If Auto Start is turned on, the test starts automatically as soon as the mains voltage is
detected and the required test leads are connected.
10. Wait for the test to complete. The loop impedance shows on the display.
The Prospective Earth Fault Current appears in amperes or kiloamperes in the display.
This test will take several seconds to complete. If you disconnect the mains while the test is
active, the test automatically stops.
Note
Warnings can occur due to equipment on the circuit under test. If the measurement is
noisy, the Interference Indicator will show red. If the Tester shows 0.00 Ω, consider that
no perfect circuit exists. Check for correct lead connection to the Tester, leads are
zeroed correctly, and fuse is good.
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