[volt-nuts] The averaging reference
tmicallef at gmail.com
Sat Dec 20 18:13:46 EST 2014
I believe the 1281 uses the LTZ1000. The datasheet mentions dual references.
My 4920 has both a ltz1000 and a lm399. I think you can find pics of the
1281 dual ref setup on eevblog.
I would not be surprised if the 8508a has a similar configuration.
On Saturday, December 20, 2014, Richard Moore <richiem5683 at gmail.com> wrote:
> The Datron 1081/1082 are 7-1/2 digit meters. The zeners are two pair of
> two zeners in series to get the ref voltage up high enough. In the two
> 1081s I had, they worked quite well, ref’d to the two Fluke 732As I had at
> the time. But not 8-1/2 digit grade, I don’t think. I have no idea what the
> 127x/128x sereis use; probably the LTZ1000A...
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