At 04:38 PM 8/2/97 -0400, you wrote:

>
>Do you really need the true RMS value?

Sadly - yes - very distorted waveforms and need true RMS to determine
what DC power (down the line) to  pump into some big batteries...

> It's usually only when you need to
>precisely measure a waveform with a truly bizarre crest factor.

Yep - thats what I've seen :(

> If that's
>what you've got to have, the classical method is to measure the heating
>effect. Works DC to daylight.

mmmm - Bit like using valves - I think I might mux an AD chip afterall :(

Rgds

Mike
Perth, Western Australia