Yikes - I just realized that Iggy, who blocks posts from Google Groups, will never see this. I really don't have the time or inclination to change news readers right now (I've been down that road before - I ran a major usenet feed in the early 90s), so if someone wanted to forward this to Iggy...
I'm violating one of my rules here "reading and responding to an electronic thread". :-) But it's interesting that so many folks don't seen to understand that point. The read what is on the front panel and "assume". :-) ...lew...
I guess you are saying most people don't have true rms meters which is what Jim is saying.
My 117 is true rms if I can believe the spec sheet, I'm pretty sure the meter I had before it was also. Wish I had it here, I could generate some sine, square, and triangle waves, measure them with the scope and then compare to what the meter indicates. That is subject to a scaling factor of .707 or .577 .
Just to make sure I'm on the right track, 10 Vdc and 10VAC rms has the same heating value?
Average is a series of equally spaced samples of magnitude divided by sample number. RMS deals with P=E^2/R which an average does not.
I'm going to have to go out and snow blow. I wasn't planning on thinking too much before noon today. ;)
I unblocked RangersSuck, it is not that I block GG because I do not like it, only because spammers post through it. Thanks a lot for a good thinking on this measuring question.
I will post an update once I figure out the safest way to do it. Which could be some weeks away. For now I just wired it with three phase and will work on the drive at my leisure.
Again, I have nothing personal against GG users. Only against buy-my-counterfeit-shoes-and-handbags.com spammers.
I have some RF ammeters - they are nice - 4 wire thermocouple... Heating effect of a precision coil drives the meter.
It works on DC to RF. Kinda nice military grade meters. (I mean panel meter - not a hand or bench ones.) I have those in Mil grade and in TI grade. My Beckman lost the LCD so I did the same to it.
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