Back-UPS CS 650: STATUS: onbatt nobatt

[Anonymous user]

Hi,

Got a problem with a brandnew CS650. The device changes to the battery every few seconds for some seconds. The line voltage is stable at 230V. The output below was generated just 10 minutes after apcupsd was started. Strange are STATUS, LASTXFER(wrong) and NUMXFERS. The following values are consistent but appear somehow questionable.

APC : 001,045,1155
DATE : 2010-12-14 15:55:21 +0000
HOSTNAME : xxx
VERSION : 3.14.8 (16 January 2010) redhat
UPSNAME : xxx
CABLE : USB Cable
MODEL : Back-UPS CS 650
UPSMODE : Stand Alone
STARTTIME: 2010-12-14 15:41:48 +0000
STATUS : ONBATT NOBATT
LINEV : 230.0 Volts
LOADPCT : 18.0 Percent Load Capacity
BCHARGE : 100.0 Percent
TIMELEFT : 25.0 Minutes
MBATTCHG : 15 Percent
MINTIMEL : 1 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 230.0 Volts
SENSE : Medium
DWAKE : 000 Seconds
DSHUTD : 180 Seconds
LOTRANS : 180.0 Volts
HITRANS : 266.0 Volts
RETPCT : 000.0 Percent
ITEMP : 29.2 C Internal
ALARMDEL : Always
BATTV : 13.6 Volts
LINEFREQ : 50.0 Hz
LASTXFER : Low line voltage
NUMXFERS : 162
XONBATT : 2010-12-14 15:55:22 +0000
TONBATT : 2 seconds
CUMONBATT: 701 seconds
XOFFBATT : 2010-12-14 15:55:21 +0000
SELFTEST : NO
STESTI : None
STATFLAG : 0x03040010 Status Flag
SERIALNO : 4B1042P27424
BATTDATE : 2010-10-14
NOMOUTV : 230 Volts
NOMINV : 230 Volts
NOMBATTV : 12.0 Volts
NOMPOWER : 400 Watts
FIRMWARE : 817.v7 .I USB FW:v7
APCMODEL : Back-UPS CS 650
END APC : 2010-12-14 15:55:24 +0000

[BillP]

Hi Hobit,

If you have a Windows based Operating system you can install the PowerChute Personal Edition software on it and hook up the UPS through USB and change it's sensitivity settings to a much more lower settings.

Can you provide the exact model number of your UPS as well?

[BillP]

apcupsd may allow you to change the sensitivity too but i am not sure how to do it on there. i have to assume that the UPS is seeing something that is causing it to transfer.

[Anonymous user · Accepted solution]

The exact model is CS650-EI.
I don't have a Windows system at hand, but apcups indeed allows to change the sensitivity. It is set to medium however and I can rule out that something funny happens on the line: I even put the CS650 behind another UPS on battery. Still the same behaviour. Next thing would be to have a look at the voltage with a scope, but I think it is not necessary.