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n Shutdown – these parameters affect signaling via the UPS’s inter-
face port. They are generally used in the context of controlling an
orderly shutdown of an attached server in the event of a power
failure or a user initiated Graceful Reboot or Graceful Off.
Low Battery Duration – length of time between low battery
signalling and shutdown of power to the attached load.
(Set this for long enough to allow the server to perform its
shutdown process)
Shutdown – The length of time between a shutdown com-
mand (from the computer to the UPS) and shutdown of
power to the attached load. This is to allow a server time to
gracefully complete its shutdown process.
Return Delay – the minimum length of time that the UPS will
wait before restoring power to the attached load after return
of normal line voltage.
Note: the UPS may wait longer than this if the battery capac-
ity is less than the value of Return Battery Capacity.
Return Battery Capacity – The minimum percentage of bat-
tery capacity required before power is restored to the at-
tached load after return of normal line voltage.
n Other
Self Test – The UPS can be configured to perform a selftest au-
tomatically at selectable time intervals.
UPS ID – the user can store up to 8 characters of descriptive
text in the UPS for identification purposes. This setting has no
effect on the operation of the UPS. Allowable characters are:
A-Z, 0-9,/, space.
Battery Date – Set at the factory to the date the battery was
installed (mm/dd/yy format). If the user replaces the battery,
the date should be updated for future reference. This setting
has no effect on the operation of the UPS. Allowable charac-
ters are: 0-9,/, space.
External Battery Packs – in SmartUPS which have external
batteries (having XL in the model number), the user must tell
the UPS how many external battery packs are attached so
that the Runtime estimate will be correct. This is important
not only for the displayed runtime estimate but also for the
Low Battery Duration time (advance warning of impending
discharged battery).