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Subject:Re: Current Draw?
From:Matt Roberds
Date:Tue, 29 May 2007 00:28:32 -0500

> From:    John Reddick <SVYOLO@YAHOO.COM>
> Date:    Sun, 27 May 2007 08:29:09 -0400
>
> Unfortunately digital meters are no more accurate than their analog
> counterparts.

I guess that's why a $200 Simpson 260-8 analog VOM (specs at
http://www.simpsonelectric.com/uploads/File/datasheets/2608.pdf ) has
2% DC accuracy and 3% AC accuracy, while a $200 Fluke 177 digital VOM
(quick specs at
http://us.fluke.com/usen/products/specifications.htm?cs_id=29983(FlukeProducts)&category=HMA(FlukeProducts)
or detailed specs in the user manual at
http://assets.fluke.com/manuals/175_____umeng0000.pdf ) has a DC
accuracy of 0.15% + 2 counts and an AC accuracy of 2% + 3 counts.

> I know they show a nice precise number, but that number was derived
> from the same electrical sensiing package,

Sometimes true.

> then through an analog to digital converter.

True for a digital meter.  That number is then simply displayed
directly, instead of run through a mechanical device and left to the
user to interpolate on a scale.

Matt Roberds