Loop Impedance (High-Current Trip Mode) - Fluke 1662 User Manual

Loop Impedance (High-Current Trip Mode)

To measure loop impedance—high-current trip mode:
If no RCDs are present in the system under test, you can use the high-current
Line Earth (L-PE) loop impedance test.
1. Turn the rotary dial to the
to indicate that high-current trip mode is selected.
2. Connect the leads to the L and PE (red and green) terminals of the Tester.
3. Press  to select L-PE or L-N.
4. 1664 FC only, press  to select between  and m resolution for the test
results. The m resolution test takes between 30 seconds and 60 seconds
to complete.
5. Zero the test leads. For a Loop (Z
6. More information about how to zero the test leads is on page 22.
6. For 1663 and 1664 FC only, press  to toggle the Zmax monitor.
If Zmax is turned on, consecutive measurements are compared. The
secondary display shows the maximum Z
Zmax is turned off. The Zmax value is saved when you save the test result.
If you change the location fields a, b, or c before you save, the actual test
result is the new Zmax. The Tester retains the Zmax value between the Z
No Trip and Z
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.
8. Touch the touch pad and watch the front panel for the W warning.

Hi Current tests.
I
Electrical Installation Tester

position. The
) test, check that all 3 leads are shorted.
I
(or Z if F1 = L-N) value until
L I
Measurements
shows on the display
I
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