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3458A DCV reading with shorting link

Question asked by perdrix on Jan 13, 2018
Latest reply on Mar 27, 2018 by tomc

I'm seeing a reading of between -50nV to -700nV on the 100mV range after completing an ACAL 0 and a CAL 0 with a newly cleaned copper shorting link installed.  A friend who also has a 3458A says his behaves the same, but that could just be two meters with the same issue!

 

I thought the whole point about doing a CAL 0 was to cancel out these seebeck voltages?

 

Is what I am seeing "normal behaviour", and if not what should be done to correct the problem?

 

Thanks

David

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