[volt-nuts] HP 3458A DC current accuracy

Poul-Henning Kamp 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 mailing list