[Nut-upsuser] unacceptable utility voltage rate of change

[Vieri]

Hi,

One of my APC devices reports: "unacceptable utility voltage rate of change".
I believe it has something to do with input voltage fluctuating too fast maybe even beneath or over the input voltage thresholds.
Should I worry about this?
should I measure input voltage? (I suppose I'd need more than multimeter readings. Maybe an oscilloscope or a multimeter that can record statistics? - I'm no expert in this field...)

battery.alarm.threshold : 0
battery.charge : 100.0
battery.charge.restart : 00
battery.date : 09/02/08
battery.packs : 000
battery.runtime : 960
battery.runtime.low : 120
battery.voltage : 55.05
battery.voltage.nominal : 048
device.mfr : APC
device.model : SMART-UPS 5000 RM DL4
device.serial : AS0836160289
device.type : ups
driver.name : apcsmart
driver.parameter.pollinterval : 2
driver.parameter.port : /dev/UPS-1
driver.version : 2.6.3
driver.version.internal : 3.0
input.frequency : 50.00
input.quality : FF
input.sensitivity : H
input.transfer.high : 253
input.transfer.low : 196
input.transfer.reason : unacceptable utility voltage rate of change
input.voltage : 226.2
input.voltage.maximum : 226.2
input.voltage.minimum : 226.2
output.voltage : 226.2
output.voltage.nominal : 230
ups.delay.shutdown : 020
ups.delay.start : 000
ups.firmware : 112.1DL4.I
ups.id : UPS_IDEN
ups.load : 039.0
ups.mfr : APC
ups.mfr.date : 09/02/08
ups.model : SMART-UPS 5000 RM DL4
ups.serial : AS0836160289
ups.status : OL
ups.temperature : 022.5
ups.test.interval : 1209600
ups.test.result : NO

Thanks,

Vieri

[Julian H. Stacey]

Post by Vieri
Hi,
One of my APC devices reports: "unacceptable utility voltage rate of change".
I believe it has something to do with input voltage fluctuating too fast maybe even beneath or over the input voltage thresholds.
Should I worry about this?
should I measure input voltage? (I suppose I'd need more than multimeter readings. Maybe an oscilloscope or a multimeter that can record statistics? - I'm no expert in this field...)

A scope wouldnt do it, you couldn't stare for hours, days,
not blink & then memorise the glitches.

There are special machines that log power fluctuations.
I used one maybe in 1977, so theyre not new & can be/ were once simple :-)

With modern micro electronics one could do more logging.
Rather than look for more hardware, as inside of (eg my) APC is
stuff full already, if I were in your shoes, I'd see if maybe APC
might be able to emit a real time output one could log on PC.

Cheers,
Julian