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Article #2167

Re: 250 Volt AC 50hz supply from battery to test Multimeter

#2167
From: John G
Date: Tue, 17 Feb 2004 21:41
57 lines
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<mathew@spamtrap-spiesareus.yi.org> wrote in message
news:slrnc33s4e.qb.mathew@alpha.spiesareus.yi.org...
> On 2004-02-17, John G <Greentest@ozemail.com.au> wrote:
> >
> > "budgie" <me@privacy.net> wrote in message
> > news:hdh130dkrv8eia7sce4vbakbvk5vo7i95l@4ax.com...
> >> On Mon, 16 Feb 2004 12:22:12 GMT, "Dave Nichols"
> ><dnichols@bigpond.net.au>
> >> wrote:
> >>
> >> >I don't know a lot about electronics design, I'm an
> > electrician but have
> >> >built a few electronic circuits succesfully.
> >> >When we do a test for dead on electrical equipment
before
> > isolating and
> >> >tagging we have to test meter on known 240v AC 50hz
live
> > source before
> >> >testing equipment for dead. If this is during a power
> > failure there is no
> >> >240v AC supply to test meter.
> >> >I thought maybe you could have a sine wave generator
at
> > 50hz feed into an
> >> >amplifier and take output to a transformer instead of
a
> > speaker.
> >> >don't know if this is feasible, maybe there are better
> > ways to do it.
> >> >whatever I come up with needs to be compact and
portable
> > to go in
> >> >electricians tool box.
> >> >Any comments or thoughs would be appreciated
> >>
> >> The sort of thing that Bob Parker would do.  He lurks
> > mainly in aus.electronics,
> >> I have x-posted this there.
> >
> > A small invertor from Dick Smith or Jaycar will run from
> >  your vehicle attery and provide plenty of AC for this
job.
>
> Not if he wants a sine-wave output.
>
Would  Sine wave be all that important just to be sure the
meter is
reading and not dead itself.
I often watch something turn OFF as I open its circuit just
to prove I
did open the correct switch if I want to work on it.
-- 
John G

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From: "John G" <Greentest@ozemail.com.au>
Newsgroups: sci.electronics.design,aus.electronics
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Subject: Re: 250 Volt AC 50hz supply from battery to test Multimeter
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