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1662/1663/1664 FC
Users Manual
36
3. Connect and zero the test leads or mains line cord. More information about
how to zero the test leads is on page 22.
4. With 1663 and 1664 FC models, press to toggle the Zmax monitor. If
Zmax is turned on, consecutive measurements are compared. The
secondary display shows the maximum Z
L
(or Z
I
if F1 = L-N) value until
Zmax is turned off.
5. 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.
6. Touch the touch pad and watch the front panel for the W warning. See
Safety Features for more information.
7. Press and release
. If Auto Start (Power-on option: + up ) is
turned on, the test starts automatically as soon as the mains voltage is
detected and the required test leads are connected.
8. Wait for the test to complete. The primary display shows the loop
impedance.
The Prospective Earth Fault Current appears in amperes or kiloamperes in
the secondary display.
9. Press the down to display Zmax if it is turned on. Press the down
several times to show the PSC, Zmax, Z
I
, and R
E
values.
10. Press the down again to display the Z
I
value.
This test will take several seconds to complete. If you disconnect the mains
while the test is active, the test automatically stops.
Note
Errors may occur due to a preload on the circuit under test. If the
measurement is too noisy, Err 5 shows on the display. (The
measured value accuracy is degraded by the noise). Press
to
show the measurement. Press
to return to the Err 5 display. If
the Tester shows 0.00 Ω, consider that no perfect circuit exists.
Check for correct lead connection to instrument, leads are
zeroed, and fuse is good.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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