Jan,
Would you please post the link to your plot? I searched but haven't found
it yet.
thanks,
Randy Evans
On Thu, Feb 12, 2015 at 3:51 AM, Jan Fredriksson wrote:
> I posted a plot of calculated resistor values versus temperature in
> the LTZ1000 thread on the EVV blog yetserday. Email me if you can't
> find it.
>
> I guess the 3458A was specified to be used at north pole and desert
> heat, that's why they have such a high temperature setting. They could
> have a "laboratory version" and a "field version" of the reference
>
> I have a NI-4071 PXI DMM with a LTZ1000 and it uses 14.3 ratio to
> fulfill the PXI specified temperature range. Still higher than optimal
> for stability but the temperature in my PXI rack is typically 40C at
> 20C room temperature.
>
> my2C
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