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Article #2276Re: Measuring small battery discharge currents
From: Craig Hart
Date: Wed, 07 May 2003 08:07
Date: Wed, 07 May 2003 08:07
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2063 bytes
plenty of the more expensive multimeters will measure down around this low... http://www.dse.com.au/cgi-bin/dse.storefront/3eb8be6f0b225312273fc0a87f9c071 5/Product/View/Q1557 or, slightly cheaper... http://www.dse.com.au/cgi-bin/dse.storefront/3eb8be6f0b225312273fc0a87f9c071 5/Product/View/Q1456 "Dale" <ewgeneral@yahoo.com> wrote in message news:65050f09.0305061710.3cda1f64@posting.google.com... > I need to measure the discharge from a 3V Lithium 'coin' cell, > supplying current to some static ram and low power support circuitry. > > This battery is supposed to have a 10 yr backup capability, which i > need to confirm, but I imagine the I to be in the very low uA to nA > range > > Has anyone got any ideas on how to measure this reasonably accurately? > > Dale
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,3b7cb272f991d702 X-Google-Attributes: gid112d1e,public X-Google-Thread: 103407,3b7cb272f991d702 X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2003-05-07 01:08:11 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!newsfeed.vmunix.org!news1.optus.net.au!optus!snewsf0.syd.ops.aspac.uu.net!ken-transit.news.telstra.net!news.telstra.net!news-server.bigpond.net.au!not-for-mail From: "Craig Hart" <no@spam.thanks> Newsgroups: sci.electronics.design,aus.electronics References: <65050f09.0305061710.3cda1f64@posting.google.com> Subject: Re: Measuring small battery discharge currents Lines: 26 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <Y83ua.4692$_o4.63475@news-server.bigpond.net.au> Date: Wed, 07 May 2003 08:07:20 GMT NNTP-Posting-Host: 203.51.131.96 X-Complaints-To: abuse@bigpond.net.au X-Trace: news-server.bigpond.net.au 1052294840 203.51.131.96 (Wed, 07 May 2003 18:07:20 EST) NNTP-Posting-Date: Wed, 07 May 2003 18:07:20 EST Organization: BigPond Internet Services (http://www.bigpond.net.au)