Amprobe INSP-3 Mode D'emploi page 16

C) Ground Impedance Test – This test is not related
to the "set load" switch and is not affected by
voltage drop on the line. This test simply tells you
the quality of the outlet ground. Most computers
and high technology electronics are reliant on
a good quality equipment ground for proper
operation. A typical rule of thumb is ground
resistance in most cases should be less than 2
ohms. Loose connection, splices or too small of a
ground conductor can cause high impedance. If
less than .05 ohms is indicated on a medium or
long wire run, check the test outlet for a short
between neutral and ground.
D) Polarity Test – This test checks for typical wiring
errors involving three wire outlets. Any wiring
errors should be corrected immediately before
further test of the outlet.
NOTE: Open hot is indicated by "No AC present"
Important Notes for Testing GFCI / AFCI Circuits
A) Consult the manufacturer's installation
instructions to determine that the device is
installed in accordance with the manufacturer's
specifications.
B) Check for correct wiring of the receptacle and
all remotely connected receptacles on the branch
circuit.
C) In case GFCI/AFCI breaker does not
automatically trip after pressing and releasing
GFCI/AFCI TEST button, push the "TEST" button on
the breaker under test. The breaker must trip. If
it does not – do not use the breaker – consult an
electrician.
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