Just recently I was using a Fluke 87 III to measure the peak current in an AC circuit.
It was pointed out that I should be using the 1ms sampling range with the Min/Max mode to catch it (it was on the default 100ms sampling). OK, I didn't know it was available but you learn...
What confused me a little is that when you step through the readings (max, min average) in 100ms mode I got a good 12A etc reading for max, and a small negative value. I just ignored it as an irelivent reading.
Once the 1ms mode is used I now seem to have a valid Max(positive) reading and what apears to be a valid Min(Negative) reading.
I have looked in the manuls and googled etc, I'm still can not find a statement as to what it means. Is it the Min reading in fact the max negative current?
It would make sense to me.. it's just when you blow a fuse some times the Min value is larger than the Max value (ignoring the sign).
So the question is, do I look at both the max and Min values, which ever is largest it the real maximum current?