andrewpreece wrote:

A 25W wirewound would be good to better than 1% probably - the blocky gold
finish type with solder terminals, RWR### I think they might be called.

Yeah, I know the ones - I have a bunch of them somewhere.



Anyway, you need only sample a
fraction of it, then
multiply up the result to get the power consumed by the load. Might be
better to do it over a longer period than 5 minutes though so temperatures
in a calorimeter have a chance to equalise.

I think I can set up a reasonably accurate calorimeter, and a few
calibration runs should allow me to compensate for its characteristics
quite nicely.



The Fluke 87 idea sounds like a lot less hassle, is that the one that
measures 'true rms'? I'd
check that it has a sampling time fast enough to record your glitches
though.

I will look into this further, thanks.


--
Grunff