On 19/12/2014 22:13, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
On 19 Dec 2014 19:30, "Jan Fredriksson" <[email protected]> wrote:
It's no coincidence that virtually all 8.5 digit DMMs use the LTZ1000.
It's in a class of it's own.
What do the 8.5 digit meters use if they don't use the LTZ1000?
Dave.
Well the 7081 uses well conditioned 1n829 zeners with a parabolic
temperature compensation scheme, but Mickle does not have a good opinion
on how well it works. but it could possibly be that the drift over the
decades since manufacture means it is running at the wrong current now.
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