"notme" wrote in message
...
Fluke clamp current meters have 2 features that seem similar: peak and
in-rush. The older models have Max (some: Peak). The recent advent in
Fluke
clamps is "In-rush".

How do these differ? Isn't in-rush current the short, max current at
motor-turn on? Shouldn't meters with a Max feature capture this
accurately?

Compare, for example, my old Fluke 36 (Max):

http://assets.fluke.com/manuals/36______iseng0000.pdf

and the 334 (In-Rush):

http://us.fluke.com/VirtualDemos/330shock.asp

(click "Explore" then "Selection Guide").

How do Max & In-rush differ? Only in the marketing department?
Or is there a real-world difference?

Thanks,
Dave


In the usual Max measurement, the input (current) is sampled and the maximum
sample is displayed, but the true maximum could have occurred between the
samples and in that case you miss the true maximum or inrush current that
your looking for. In inrush current measurements first off it's a triggered
measurement and measures for a very short period of time and it doesn't
depend on samples, I think it's an analog approach.

Shaun