[volt-nuts] HP3458A _really_ long term stability
Poul-Henning Kamp
phk at phk.freebsd.dk
Wed Sep 7 08:52:17 UTC 2011
In message <33473809FD874529A25FBD3D6B6EB55E at laptop>, "Andreas Jahn" writes:
>If the last cal was really before 1.1.1990 remember that the
>official volt has been redefined at 1.1.1990 by +8.06 ppm.
>So all readings which were made before have to be corrected by -8.06ppm.
Now things get interesting: the 8.06 was for "most other countries",
but for US it was 9.26 PPM.
Does anybody know if HP calibrated 3458A's going to europe differently
from those going to USA ?
--
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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