[volt-nuts] Fluke 5200A instability... A resolution...

[Chuck Harris]

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 frequencies.

Wouldn't it have been better to arrange things so that the
integrator randomly frequency hopped about a range of frequencies?

With computer control, it should be fairly easy to compensate for
the differing integration times such a scheme would require...
even back then.

-Chuck Harris


David C. Partridge wrote:
> Chuck I so feel for you one this one.  I almost went down the exact same
> rabbit hole about two years back when I didn't set the AC Filter to ON on my
> 7081.
>
> Luckily I didn't get very far down the "my 5200A isn't working" track before
> I was reminded by a friend that I needed to turn on the filter for <400Hz
> signals.
>
> Cheers
> Dave
>