[volt-nuts] HP 3458A DC current accuracy
phk at phk.freebsd.dk
Wed Jul 11 07:56:30 UTC 2012
In message <4FFCA814.5080200 at toneh.demon.co.uk>, Tony Holt writes:
>I've never understood why relatively expensive and sophisticated
>instruments don't have significantly lower resistance shunts
Isn't it simply because there are better ways to do it, than to
use an external shunt ?
Flux Gate current sensors regularly have <1PPM linearity without even
breaking the circuit to be measured, and their offset due to
earths magnetic field is trivially cancelled by zeroing.
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.
More information about the volt-nuts