[volt-nuts] 3458A in the SW Chicagoland area/Geller Labs references?

[Jason Pepas]

Hi Chris,

You might consider taking a look at the EEVBlog USA Cal Club thread.  We
are mailing a Geller Labs reference around the country.

The reference doesn't have a lot of history built up yet, and we haven't
tried shipping it back and forth between the same two parties multiple
times to characterize shipping-induced instability, but it has been in the
hands of a couple of 3458A owners, so its uncertainty is a bit of a mixed
bag at the moment.

Either way, its fun to participate :)

http://www.eevblog.com/forum/metrology/usa-calibration-club/

-Jason Pepas


On Fri, Aug 11, 2017 at 4:55 PM, Chris Farley via volt-nuts <
volt-nuts at febo.com> wrote:

> Greetings all,
>
> As suggested several months ago, I'm put out an inquiry/request to see if
> there's anybody in the area who has an HP3458A or better anywhere near me
> down here in Sandwich, that I might be able to either A) compare readings
> to my 3456A, or possibly use (without removing from your premises,
> obviously) use to calibrate my Fluke 332B.  I have means to keep my units
> powered during transport, so hopefully would not require hours of sitting
> to stabilize before taking any readings.  The 3456A's limitations are
> really being stretched, in trying to calibrate a 332B with it alone.
>
> Alternatively, is anybody aware of a Geller Labs (closed) voltage
> reference available on the used market, or something of equal or better
> precision available today?  The Malone Electronics VREF10-003 looks very
> interesting, with supposed 6mos accurace of ±300uV.
>
> Regards,
> Chris
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