American Power Conversion MatrixTM UPS - Manual (Page 22)

This screen shows selected UPS self test function choice. The self test determines
the readiness of the UPS to supply power to the load in the event of utility failure.
The benefit of this test is that the user is warned of conditions that could otherwise
cause unexpectedly short run times.
l ON - UPS conducts self test immediately upon start-up.
l OFF - Self test function is disabled.
l 7 day - The UPS conducts the self test automatically upon start-up and once every
7 days thereafter.
l 14 day - The UPS conducts the self test automatically upon start-up and once
every 14 days thereafter.
This screen shows the selected utility failure sensitivity function choice. The
UPS can be set to automatically adapt to utility service conditions where
extreme voltage distortion is present or where severe rapid voltage excursions
occur. Such conditions are typically created by inexpensive fuel generators
or by unusually long branch circuits burdened by heavy cyclic loads.
Nearby arc welding or heavy industry equipment can also affect the quality of service.
l AUTO - UPS automatically adapts to utility service quality. This adaptive
mode is selected to reduce frequent transfers to on-battery operation which
could unnecessarily exercise the battery, shortening its life. Normally, the
UPS provides load voltage regulation within a narrow band. In response to
rapid and frequent utility voltage fluctuations, the UPS relaxes the load
voltage regulation. This relaxed regulation band remains within the bounds
recommended by telecommunications and computer manufacturers.
See the Specifications section of the manual for the regulation ratings.
l High - UPS remains sensitive to aberrant line voltages. Load voltage
regulation stays within the narrow band.
l Low or Medium - UPS is insensitive to aberrant line voltages. The load
voltage regulation is relaxed to a widened band.
The voltage at which the UPS will transfer to on-battery operation is
adjustable for service conditions where extremely high utility voltages
persist and it is known that the loads can withstand the elevated voltage.
l When configured for operation from a 208V service, the transfer voltage
choices are 240V, 244V, 248V, and 252V.
l When configured for operation from a 240V service, the transfer voltage
choices are 276V, 264V, 253V, and 282V.
The minimum interval between activation of the UPS’s audible, visual and
signalled low battery alarm warnings and shut down of the UPS due to
battery capacity exhaustion is user settable.
l The function choices are 2, 5, 7, and 10 minutes.
The UPS may be set to shut down before usable battery capacity is
spent. This conserves battery capacity in the event of successive outages.
l The function choices for the amount of on-battery run time to be
conserved are NO (none) and 2, 5, and 8 minutes.