[Test-Equipment] Evaluation of two DMMS

[John King]

Hello Al. I put a new Duracell 9 volt battery in each to make sure they were using the same voltage source. These Flukes have ONLY an ohms range, so I guess they are auto ranging. The 8025 that reads .2 ohm with the leads shorted is one I have used for several years. I bought it at Shelby one year. the one that reads high is a recent ebay buy and the seller suggested that I return it but I like the 8025s because they are mil spec and would like to keep it if I can get it reading correctly. 

Barbara is recovering from a fractured leg and surgery on her wrist/hand due to a break, both of which were suffered in an auto accident.

Weather is cool and we are otherwise doing OK. Hope you and Pat are doing well.

We will be stopping by Belton, Texas Hamfest first week in October on the way home. 73, John, K5PGW

--- On Sun, 8/8/10, Al Parker <anchor at ec.rr.com> wrote:

> From: Al Parker <anchor at ec.rr.com>
> Subject: Re: [Test-Equipment] Evaluation of two DMMS
> To: "Discussion of Electronic Test Equipment" <test-equipment at mailman.qth.net>
> Date: Sunday, August 8, 2010, 9:35 AM
> hi John,
>     I hope things are well with you and
> Barbara "out there".  Maybe not so 
> hot a July as "back here".
>     A man with a watch knows what time it
> is, a man with 2 watches is never 
> sure.
>     If you switch batteries in the 2 meters,
> does the same one still read 
> off?  Particularly the low range depends a bit on the
> battery voltage 
> and ability to hold a current drain.
>     On the next higher scale, do they read a
> test resistor close to the 
> same?  (doesn't really matter  what the actual
> resistance is.)
>     It could just be that the resistor for
> the low range in the "bad" one 
> has had too much current thru it & is off value.
>     Just some thoughts.
>     I've just started on an SP-600 to be
> delivered at Shelby, hope there's 
> enuf time.  Same fellow I did one for 4 yrs ago.
> 73,
> Al
> 
> 
> 
> 
> On 8/8/2010 1:09 PM, John King wrote:
> > I have two Fluke 8025A multimeters that read
> differently on the ohms scale.
> >
> > Using the same test leads on each, the ohms scale
> reads differently on the two meters. With the leads shorted
> on the ohms scale of one of the Flukes the resistance
> reading is .2 ohms. The other meter, using the same test
> leads, when they are shorted, reads 10+ ohms.
> >
> > I would like your input regading how useful the meter
> that has the higher ohms reading might be in service work.
> Measuring a 9 vdc battery on the DC scale reads within .01
> vdc, so the difference is in the ohms scale.
> >
> > I am not sure how the ohms reading differing will
> affect the utility of the higher reading meter in service
> work.
> >
> > Your comments will be appreciated. Thanks and 73,
> John, K5PGW
> >
> >
> >
> >
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