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Releasing the press button before the constant buzzer tone will
stop the test.
If the RCD does not trip, the upper LED's will flash AMBER and
the buzzer will emit a slow pulsed tone.
3.3.5 RCD's in the Circuit Under Test
The EZ165 / EZ365 should operate satisfactorily on circuits
protected by most 30mA or higher RCDs or RCBOs.
Factors which should be considered are where equipment,
such as computers, may introduce earth leakage currents due
to internal noise filter circuits. This earth leakage current can
approach the trip threshold of an RCD or RCBO, and the EZ165
/ EZ365 test current will add to it with the possibility of the
protective device tripping.
Before using the EZ165 / EZ365 on critical circuits which supply
computers, medical equipment, or other systems where loss of
supply is unacceptable, ensure these are not being operated, in
line with normal practice when using electrical test equipment.
3.3.6 Possible Effects on Accuracy when Measuring Earth
Loop Impedance
Where supply circuits under test have highly inductive
or capacitive loads distributed on that circuit or there is
an excessive amount of mains disturbance present (e.g.
motors running, etc) it is possible the earth loop impedance
measurement could be affected.
In such circumstances, where possible, disconnect any loads
that may be a source of error.
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