This link was posted over on Insight Central and I wondered if it might help for those wanting to check the accuracy of their DMM voltage readings: http://geoffg.net/Voltage_Reference.html. It looks quite simple and am thinking of making it just to see how my meters are doing.
Jeff, are you implying that if I want reasonably good voltage measurements I'd be better off with a non-clamp meter? I have an Extech EX830 so don't really know how accurate it is. On Wed, Sep 25, 2013 at 7:34 AM, Jeffrey Jenkins <evnetics.j...@gmail.com> wrote: > EVDL Administrator wrote >> .... >> Just be careful. Cheap multimeters are notoriously inaccurate. Some vary >> their readings with temperature. >> >> I'm not an expert, but my impression has been that clamp ammeters are >> mostly >> for by-guess-and-by-gosh measurement. I don't think they're ever all that >> accurate. Certainly the ones I can afford aren't. ;-) >> >> David Roden - Akron, Ohio, USA >> EVDL Administrator >> .... > > Yes, this. I have 3 different model Fluke clamp meters and 2 clamp probes > that all agree within 10A at 1000A (ie - 1%). We also have 4 other different > brand clamp meters and not a single one agrees with the others, much less > the Flukes, and are off anywhere from 30A, at best, to 100A typical (and > invariably they read low, which is especially bad in my opinion). > > And for mV accuracy don't even think about a clamp meter... Voltage readings > on them are more or less an afterthought, even for the Flukes. > > > > > > -- > View this message in context: > http://electric-vehicle-discussion-list.413529.n4.nabble.com/AC-DC-amp-meter-tp4665328p4665338.html > Sent from the Electric Vehicle Discussion List mailing list archive at > Nabble.com. > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA > (http://groups.yahoo.com/group/NEDRA) > -- David D. Nelson http://evalbum.com/1328 http://www.levforum.com Nokia Lumia 920 Windows Phone 8 _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
