[sdiy] DMM problems [OT]

[Travis Shire]

I was having problems with my Fluke 79 a couple weeks back and what ended up
taking care of it was resoldering the (pcb mounted : /) banana jacks. They
weren't visibly cracked loose, but freshening up the solder took care of it.
BTW, that's what I noticed about this meter....screwey R readings.


> Unfortunately not this simple .. I tried different leads (and even just
> shorted the terminals with a banana lead)
>
> The interesting thing is that it gives very different readings in
> different ranges:
>
> Continuity tester mode: 31.8R + bleep
> Lowest: 32.0R
> Low: 424R
> Mid: 2.30K
> High: 20.8K
> Higher: 208K
> Highest: 0.21M
>
> All other modes: diode tester, cap meter, voltmeter, etc. work perfectly.
>
> Thanks anyway,
> Seb
>
>
> anthony wrote:
> > This happens to me when the wire is about ready to break. The lead
> > wire is maybe only one filament or two of actual copper wire - ergo it
> > has a higher resistance.
> >
> > ----- Original Message ----- From: "Seb Francis" <seb at burnit.co.uk>
> > To: "Synth DIY" <synth-diy at dropmix.xs4all.nl>
> > Sent: Wednesday, March 29, 2006 4:17 PM
> > Subject: Re: [sdiy] DMM problems [OT]
> >
> >
> >> Seb Francis wrote:
> >>> It reads about 500R in autoranging mode and different readings in
> >>> each range when manually ranged (from about 30R up to 20M depending
> >>> on range).
> >>>
> >> Sorry, should have said "with the inputs shorted".  When measuring a
> >> resistor the reading is similarly way off (much higher than it should
> >> be)
> >>
> >> Seb
> >>
> >>
> >>
> >>
> >
> >
> >
> >