[volt-nuts] Fluke 732A themistor reading

[Randy Evans]

Todd and Bill,

Thanks for the input.  The 3.6 K thermistor reading seems viable and i will
pursue it further.

I may have over committed myself to modifying the HP-419A, the Fluke 845A,
buying the 3458A and looking at buying a Fluke 732A.

So much to do and so little time.

Thanks again,

Randy


On Sun, Aug 17, 2014 at 11:48 AM, Bill Gold <wpgold3637 at att.net> wrote:

> Randy:
>
>     I have 6 ea Fluke 732A instruments.  The results of being an over the
> edge and deeply obsessed "Volt Nut", they just kept adding (reproducing?)
> over the years.  My readings for the themistors range from 3.407K OHMS to
> 4.514K OHMS and all work just fine.  3.6K OHMS would seem just fine to me.
> It really depends upon the final inside temp of the oven assembly.  The one
> with 3.407K OHMS measures around 47.5 degrees C while the others are around
> 45 C.  It is the stability of this reading over time that is very
> important.
> Fluke says that it could change as much as 10 ohms per month but mine are
> rock solid for years and years.
>
> Bill
>
> ----- Original Message -----
> From: "Randy Evans" <randyevans2688 at gmail.com>
> To: <volt-nuts at febo.com>
> Sent: Sunday, August 17, 2014 11:08 AM
> Subject: [volt-nuts] Fluke 732A themistor reading
>
>
> > Can anyone tell me what value to expect for a Fluke 732A thermistor
> > reading?  I am looking to get a used 732A and one of the things I was
> told
> > to look for is to measure the thermistor reading after the unit has
> heated
> > up for at least an hour.  I saw in one of the posts that a "typical"
> > reading was 4950 ohms.  One vendor I asked said he measured about 3600
> ohms
> > after a two hour warmup. I was concerned that this is too low.  What do
> you
> > guys think?
> >
> > Thanks,
> >
> > Randy
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