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VR101S
Users Manual
4
(N-G) events and to measure the recorder’s polarity,
indicated by the LED. Also see below under “Using an
Ungrounded Outlet”. The ground prong may be
electrically disconnected (as long as it is not exposed).
The recorder does not need special ventilation,
however, its ambient temperature should not be allowed
to rise above the operating limit. (See Chapter 7 “VR101
Specifications”.
Using an Ungrounded Outlet
Plugging the recorder into an ungrounded outlet has the
following consequences:
1. Polarity indication by the LED is not valid.
2. Neutral to ground events captured are not valid.
3. If the recorder is plugged in improperly (improper
polarity), hot to neutral events captured are shifted
180 degrees and indicated with the opposite
polarity.
Polarity Indication
In some countries outlets are not polarized. This means
that the recorder can be plugged in improperly (hot and
neutral swapped). Improper polarity connection will not
cause damage to the recorder but events will not be
correctly recorded and the results may cause
misinterpretation.
Note 1:
When plugging in the recorder improperly
(improper polarity connection), the LED will
blink quickly during 8 to 16 seconds (also see
Note 2). When plugging in correctly, the LED
lights steadily during 8 to 16 seconds. Polarity
indication starts from 0 to 8 seconds after
plugging in.
Note 2:
The LED on the recorder also blinks when an
event is captured, but then it blinks slowly.