[volt-nuts] Thermistor value for 732A Reference 10V Standard

[WB6BNQ]

Mitch,

Quite the contrary.  The 10 volt output is the master output and therefore the
most stable.  The others are derived from dividers and thus add additional error
terms due to the tempco of the divider string and any possible loading presented
to those outputs.

Bill....WB6BNQ

Mitch Van Ochten wrote:

> I think monitoring the 1V or 1.1V is a better test over temperature than
> monitoring the 10V.  It's quite stable even without the heater.
>
> ----- Original Message -----
> From: "Rob Klein" <rob.klein at smalldesign.nl>
> To: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
> Sent: Friday, June 29, 2012 6:29 AM
> Subject: Re: [volt-nuts] Thermistor value for 732A Reference 10V Standard
>
> Op 29-6-2012 6:34, Tom Leedy schreef:
> > Has anyone actually measured the internal temperature of the oven (in
> > degrees
> > C)?  Since the operating temperature of the 732A is spec'd at 40 C, I
> > suspect
> > that it is about 45-50 C, or so.
>
> According to the manual it's 48 ± 2°C
>
> > And I also suspect that temperature stability
> > of the oven is more important than absolute accuracy.
>
> You'd be correct :-)
> >
> > I didn't expect the large outpouring of knowledge!
>
> *Nobody* expects the large outpouring of knowledge! (with apologies to
> M. Python)
>
> Rob.
>
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