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Adam Kropelin wrote:
> Artem Volk wrote:
>> I've Back-UPS ES 525 bought three monthes ago. I use it to protect
>> FreeBSD box with apcupsd installed. All data I mention below is
>> gathered using apcaccess 3.14.2.
>> I monitor the UPS and noticed that time remaining on battery degrades
>> from 42 minutes to 20 minutes two weeks ago, then to 20 minutes, and
>> now for approximately 3 minutes. The load is the same --
>> approximately 17%,
>> the battery charge level is 100%.
>> During its life the UPS has three big power outages (discharge to
>> 10%) and it seems that it have "ON-LINE BOOST" state very often.
>> acptest do not have calibrate option for my UPS.
>> Why the battery became weak so fast?
> The BOOST status indicates that the UPS believes the line voltage is below
> spec and is using battery power to boost it.
That does not explain it because a Smart-UPS diddles the tap on a
transformer if the line voltage is too low just to avoid using the battery.
APC call that SMART BOOST. It would use the battery only if the line voltage
were so low that changing the transformer tap was not enough. (Similarly if
the line voltage were too high and it used SMART TRIM).
What is your actual line voltage? Mine says this at the moment:
LINEV : 123.5 Volts
You can look at your system log file (/var/log/messages) for apcupsd events
to see what your line voltage is doing. Mine says stuff like this (in part)
Apr 22 21:16:06 trillian apcupsd:
Apr 22 22:16:37 trillian apcupsd:
Apr 22 23:17:07 trillian apcupsd:
> This may explain the reduced
> battery runtime figure.
> Try using apctest to reduce the UPS low voltage threshold (you may need
> 3.14.3 to see this option).
Do not set this arbitrarily. I set mine so the voltage window where it lets
things alone is as wide as possible without going out of the range that the
power supply promises to regulate properly. So if my line voltage goes under
97 volts, SMART BOOST is started. If it goes over 129 volts, SMART TRIM goes
into effect. YMMV.
LOTRANS : 097.0 Volts
HITRANS : 129.0 Volts
.~. Jean-David Beyer Registered Linux User 85642.
/V\ PGP-Key: 9A2FC99A Registered Machine 241939.
/( )\ Shrewsbury, New Jersey http://counter.li.org
^^-^^ 23:35:01 up 36 days, 4:37, 2 users, load average: 4.38, 4.28, 4.17
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