νShutdown – 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.
νOther
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:
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:
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).
10