Multifunction Tester
Measurements
37
6. For 1673 FC and 1674 FC only, tap Zmax to toggle the option on and off.
If Zmax is turned on, consecutive measurements are compared. The secondary display
shows the maximum Z
L
(or Z
I
for L-N) value until Zmax is turned off. The Zmax value is saved
when you save the test result. The Tester retains the Zmax value between the ZI No Trip
and Z
I
Hi Current tests.
7. Connect the leads to the L and PE of the system under test or connect the mains test cord
to the socket under test.
The interference meter shows on the display.
8. 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.
9. Wait for the test to complete. The display shows the loop impedance.
The Prospective Earth Fault Current (PEFC) appears in amperes or kiloamperes below the
loop impedance measurement.
10. If Zmax is turned on, the Zmax value shows on the display.
XW Warning
To prevent possible electrical shock, fire, or personal injury, ensure there are no
RCDs present. Any RCDs in the system will trip.
Note
The Tester may show a test result when the RCD is tripped if the trip time is >10 ms.
Because of the short measurement, the test result does not meet the published
specification. If the Tester shows 0.00 Ω, consider that no perfect circuit exists. Check
for correct lead connection to the Tester, leads are zeroed, and fuse is good.
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