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Article #2167Re: 250 Volt AC 50hz supply from battery to test Multimeter
From: John G
Date: Tue, 17 Feb 2004 21:41
Date: Tue, 17 Feb 2004 21:41
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3097 bytes
<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 Wot's Your Real Problem?
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,ff8104e2c376ad X-Google-Attributes: gid112d1e,public X-Google-Thread: 103407,a2e1b495846b3e86 X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2004-02-17 13:41:17 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news2.google.com!newsfeed2.dallas1.level3.net!news.level3.com!zeus.visi.com!news-out.visi.com!petbe.visi.com!news.octanews.net!news1.optus.net.au!optus!snewsf0.syd.ops.aspac.uu.net!nnrp1.ozemail.com.au!53ab2750!not-for-mail From: "John G" <Greentest@ozemail.com.au> Newsgroups: sci.electronics.design,aus.electronics References: <UB2Yb.62674$Wa.33056@news-server.bigpond.net.au> <hdh130dkrv8eia7sce4vbakbvk5vo7i95l@4ax.com> <pzeYb.76$L43.2210@nnrp1.ozemail.com.au> <slrnc33s4e.qb.mathew@alpha.spiesareus.yi.org> Subject: Re: 250 Volt AC 50hz supply from battery to test Multimeter Lines: 60 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Message-ID: <0UvYb.524$L43.10243@nnrp1.ozemail.com.au> Date: Wed, 18 Feb 2004 08:41:11 +1100 NNTP-Posting-Host: 203.102.234.113 X-Trace: nnrp1.ozemail.com.au 1077054076 203.102.234.113 (Wed, 18 Feb 2004 08:41:16 EST) NNTP-Posting-Date: Wed, 18 Feb 2004 08:41:16 EST