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Thu Jul 19 11:01:08 EDT 2012

APC Back-UPS ES 550G

Installed apcupsd and changed config file to usb device, left the
other Debian defaults.



zoo:/home/tom# apcaccess
APC      : 001,034,0858
DATE     : 2012-07-19 10:59:54 -0400  
HOSTNAME : zoo
VERSION  : 3.14.10 (13 September 2011) debian
UPSNAME  : zoo
CABLE    : USB Cable
DRIVER   : USB UPS Driver
UPSMODE  : Stand Alone
STARTTIME: 2012-07-19 10:59:53 -0400  
MODEL    : Back-UPS ES 550G 
STATUS   : ONLINE 
LINEV    : 117.0 Volts
LOADPCT  :  34.0 Percent Load Capacity
BCHARGE  : 100.0 Percent
TIMELEFT :  19.2 Minutes
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME  : 0 Seconds
SENSE    : Medium
LOTRANS  : 092.0 Volts
HITRANS  : 139.0 Volts
ALARMDEL : 30 seconds
BATTV    : 13.5 Volts
LASTXFER : No transfers since turnon
NUMXFERS : 0
TONBATT  : 0 seconds
CUMONBATT: 0 seconds
XOFFBATT : N/A
STATFLAG : 0x07000008 Status Flag
SERIALNO : 4B1205P26980  
BATTDATE : 2012-02-02
NOMINV   : 120 Volts
NOMBATTV :  12.0 Volts
FIRMWARE : 843.K4 .D USB FW:K4
END APC  : 2012-07-19 11:00:22 -0400  


I'm a bit worried about this:

LOTRANS  : 092.0 Volts
HITRANS  : 139.0 Volts

That seems like a big fluctuation.
I've seen some flickering (incandescent) lights also..

Tested it:

Broadcast Message from root@zoo                                                
        (somewhere) at 11:37 ...                                               
                                                                               
Power failure on UPS zoo. Running on batteries.                                
                                                                               

zoo:/home/tom# apcaccess 
APC      : 001,035,0890
DATE     : 2012-07-19 11:37:08 -0400  
HOSTNAME : zoo
VERSION  : 3.14.10 (13 September 2011) debian
UPSNAME  : zoo
CABLE    : USB Cable
DRIVER   : USB UPS Driver
UPSMODE  : Stand Alone
STARTTIME: 2012-07-19 10:59:53 -0400  
MODEL    : Back-UPS ES 550G 
STATUS   : ONBATT 
LINEV    : 000.0 Volts
LOADPCT  :  39.0 Percent Load Capacity
BCHARGE  : 088.0 Percent
TIMELEFT :  14.0 Minutes
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME  : 0 Seconds
SENSE    : Medium
LOTRANS  : 092.0 Volts
HITRANS  : 139.0 Volts
ALARMDEL : 30 seconds
BATTV    : 11.9 Volts
LASTXFER : Low line voltage
NUMXFERS : 1
XONBATT  : 2012-07-19 11:36:53 -0400  
TONBATT  : 15 seconds
CUMONBATT: 15 seconds
XOFFBATT : N/A
STATFLAG : 0x07060010 Status Flag
SERIALNO : 4B1205P26980  
BATTDATE : 2012-02-02
NOMINV   : 120 Volts
NOMBATTV :  12.0 Volts
FIRMWARE : 843.K4 .D USB FW:K4
END APC  : 2012-07-19 11:37:08 -0400  
                                                                               
Broadcast Message from root@zoo                                                
        (somewhere) at 11:37 ...                                               
                                                                               
Power has returned on UPS zoo...                                               
                                     

So computer stayed on fine, but the SIP phone rebooted when switching
from battery to line.  Not a big deal I guess.

I wanted to measure the waveform so I plugged the Rigol scope in the
UPS.  It gives a 3-step square approximation.  However, switching the
power back glitched the computer.  Unplugging the monitor solved the
issue.  Maybe the initial current inrush is too much to handle?
Probably best to plug the computer separately, or not plug anything
else, maybe just phone.  Let's try that.

Nope, it still glitches with PC + phone + hub.  Maybe it's just
because battery is near empty?  Or do I misunderstand something.  This
might not be designed to handle power coming up again?

Let's try to put PC to sleep and cycle.  I really need something that
works reliably to bridge a couple of minutes without shutting PC down..

Yep, that works.  So maybe I should get a more powerful model.

It does glitch the phone, but the energy stored in the PC power supply
seems to be enough to survive the glitch.

It might be better to upgrade to a more powerful model.  Anyways, lets
just put this one to the test in a real situation after it's charged
for a day.



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