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Electronics => Metrology => Topic started by: Jay_Diddy_B on January 01, 2026, 05:31:43 pm

Title: Datron 1062 Calibration Fixture 400391 and 400392
Post by: Jay_Diddy_B on January 01, 2026, 05:31:43 pm

Hi group,

The first two lines of the Datron 1062 DC calibration call for connecting a 1M \$\Omega\$ resistor in parallel with a 1nF capacitor for the Lin step. A 10M \$\Omega\$ resistor in parallel with a 1nF capacitor is required for the I_B step. Both networks are described as shielded and given the Datron part numbers 400391 and 400392 respectively.

I was unable to find any pictures of these fixtures. I had to take an educated guess at the design.

This what I came up with:

(https://www.eevblog.com/forum/metrology/datron-1062-calibration-fixture-400391-and-400392/?action=dlattach;attach=2726189;image)

(https://www.eevblog.com/forum/metrology/datron-1062-calibration-fixture-400391-and-400392/?action=dlattach;attach=2726181;image)

(https://www.eevblog.com/forum/metrology/datron-1062-calibration-fixture-400391-and-400392/?action=dlattach;attach=2726185;image)

I have connected the case and the shielding copper to the Guard terminal.

The networks are housed in a 1 inch length of aluminum extrusion.

Does anybody have the official fixtures?

Regards,

Jay_Diddy_B

Title: Re: Datron 1062 Calibration Fixture 400391 and 400392
Post by: TheDefpom on January 05, 2026, 01:06:22 pm

Very nice.

I always just used some through hole parts and screwed them down in the terminals, seemed to work fine.