We have inherited a pair of HP R5000 UPSes from another part of our business. They each came with a network interface modue and a single runtime extension module (aux battery). We did a full factory reset on them and updated the firmware to the latest available. When we first put them in service they claimed to be at about 10% load and had a runtime estimate of over 9 hours, but when the power went out they dropped the load and completely shut off after just 5 minutes.
Obviously the batteries were expired, so we diconnected the extension modules and bought a fresh set of HP-branded internal battery packs. With just those internal batteries, and some additonal load up to about 33% they now calculate ~26 minutes of run time, but again drop the load and shut off entirely after ~7 minutes. We left them in this state for several weeks but nothing improved.
Frustrated, we bought a third set of internal batteries from a different supplier (exactly the same type as used in the genuine HP battery packs) and have exactly the same result: they calculate 26-27 minutes run time at 33% load but die completely and without warning at roughly 7 minutes.
We could live with 7 minutes uptime if they would calculate runtime correctly and signal the attached servers to shut down gracefully, instead of just suddenly dropping dead. The battery test function produces either 'abort' or 'OK' as a result but does so instantly it doesn't seem to actually test anything.
How do we calibrate these things so that they have an accurate time estimate? Our similar APC UPSes have a calibration test that can be triggered manually but I don't see any corresponding function either on the web interface or the front panel.
Thanks.
