[volt-nuts] HP3458A _really_ long term stability

Poul-Henning Kamp phk at phk.freebsd.dk
Mon Sep 5 16:05:45 UTC 2011


I finally had a chance to drop my HP3458A into a friendly Cal-lab and since
the last sticker on it says it is due for calibration in "2-1996" we are
talking seriously overdue calibration.

The result:
	Internal 40K resistor:   -11.66ppm
	Internal 7V Voltage ref: -28.96ppm

That's not too shabby over 15 years...

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.



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