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mike mike is offline
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Default Kill-o-watt meter used on computer UPS - bad readings?

Bob F wrote:
I just unplugged the Belkin 1200 VA UPS powering my computer, and plugged it
into my Kill-o-watt meter. After the UPS quit beeping after power was restored,
the meter shows 7-11 watts being consumed by the UPS feeding the computer, which
is way less than the computer (quad core core-duo processor) uses.

Does the killowatt have a problem reading accurately with UPS units?




I tried a Killawatt P4400 on my old dell.
Reads 100W/140VA.

Do you know if your Killawatt is working?
Try it on an incandescent light bulb.

It's possible to exceed the crest factor capability
of the meter, but your computer shouldn't do it.

You can work around that problem by measuring
a light bulb then adding the computer and subtract
the light bulb watts.