Re: How to measure sub micro amps.

From: Tim Shoppa (shoppa_at_trailing-edge.com)
Date: 06/26/04 

Date: 26 Jun 2004 04:53:17 -0700

Tim Auton <tim.auton@uton.[groupSexWithoutTheY]> wrote in message news:<0vtod0lu9d8d8qjd5cak7g41lr976lv9qv@4ax.com>...
> John Larkin <jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:
> [death of RS-232?]
> >Any but trivial instruments should go Ethernet nowadays. GPIB is ugly
> >and expensive, RS-232 is slow and won't network, USB is too short
> >range.
>
> RS-232 is CHEAP and therefore the best solution for trivial
> instruments / devices.

Replace "232" with "485" and I'll agree... it gets around the rate
and length and most of the ground potential considerations at basically
zero cost.

Ethernet is really nice for many instruments because it is transformer-
coupled at both ends, getting rid of any nasty ground loops in your
instrumentation data connection.

Tim.