Date: 09 Jun 2004 08:24:48 +0100 From: Richard Caley <rjc@caley.org.uk> To: Charles Swiger <cswiger@mac.com> Cc: "Bernt. H" <bernt@bah.homeip.net> Subject: Re: [OT] Re: Leaving a server on all day Message-ID: <87brjtdwhr.fsf@pele.r.caley.org.uk> In-Reply-To: <3F7DF4CB-B993-11D8-8148-003065ABFD92@mac.com> References: <20040608122101.GA68204@dogma.freebsd-uk.eu.org> <87zn7ednwg.fsf@pele.r.caley.org.uk> <20040608172756.GA70798@dogma.freebsd-uk.eu.org> <20040608135903.024729b8.wmoran@potentialtech.com> <6CCB3AEC-B97C-11D8-8148-003065ABFD92@mac.com> <40C62A70.8060102@bah.homeip.net> <3F7DF4CB-B993-11D8-8148-003065ABFD92@mac.com>
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In article <3F7DF4CB-B993-11D8-8148-003065ABFD92@mac.com>, Charles Swiger (cs) writes:
cs> You are correct that one needs to measure the voltage and use the RMS
cs> value, or DC series equivalent if you like that phrase, in order to
cs> figure out the power consumption accurately, but an {ammeter,
cs> amp-meter, DMM} which can deal with AC will do the right thing.
[from the we don't need no steeeeenking test equipment dept.]
When I did this kind of thing a few years ago (trying to get a measure
for things like the washing machine heating water and the kettle etc
as well as PCs) I did it by watching the electricity meter.
The one I had at the time had a big rotating disk with ticks marked on
it counting off load as well as the dials recording larger units
(can't easily see the current one to check this is a normal
feature). I turned off everything I could in the flat, then turned
various things on and counted off ticks per minute.
I assumed that the electricity company was trying to do a reasonably
good job to get as much money as possible without getting caught
cheating, and in any case I was worried about money not the
environment, so whatever they were measuring was the right metric,
even if they were wrong scientifically.
--
Mail me as MYFIRSTNAME@MYLASTNAME.org.uk _O_
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