13
Basic Operation
continued
NORM
DELAY
Power Sensitivity Adjustment (Select Models Only):
This dial is normally
set fully counterclockwise, which enables the UPS to protect against waveform
distortions in its AC input. When such distortion occurs, the UPS will normally
switch to providing PWM sine wave power from its battery reserves for as long
as the distortion is present. In areas with poor utility power or where the UPS’s
input power comes from a backup generator, chronic waveform distortion could
cause the UPS to switch to battery too frequently, draining its battery reserves.
You may be able to reduce how often your UPS switches to battery due to
waveform distortion by experimenting with different settings for this dial. As the
dial is turned clockwise, the UPS becomes more tolerant of variations in its input
power’s AC waveform.
NOTE:
The further the dial is adjusted clockwise, the greater the degree of waveform
distortion the UPS will allow to pass to connected equipment. When experimenting with
different settings for this dial, operate connected equipment in a safe test mode so that the
effect on the equipment of any waveform distortions in the UPS’s output can be evaluated
without disrupting critical operations.
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