The HP 3455A had a much better AC section but it was a pain to cal.
HP work hard to make cal easy and settled for a weak AC converter so they
could do a closed case cal.
The 3455A, 3457A and 3458A all integrate at line frequency and all have a
better AC converter.
Integration is tied to line fre
Hi David,
I don't mind so much the journey, as I do being disappointed
in the performance of the HP3456A's AC section. DC and Ohms,
it is a wonderful DVM. AC, not so much.
Since it times its integrators to the power line frequency, it
is dooming itself to work stably only at those exact freque
ded to turn on the filter for <400Hz
signals.
Cheers
Dave
-Original Message-
From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Chuck
Harris
Sent: 27 August 2015 17:41
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Fluke 5200A instability... A resol
Back in July, I posted this note about a stability problem I
was having with my Fluke 5200A. I didn't get much response,
so I dove in with both feet.
The symptom was viewed on a trio of HP3456A 6-1/2 digit DVM's,
when measuring the 10V 60Hz output of a Fluke 5200A.
The 3456A's showed a 20mv off
