Doesn't the "input" C-H monitor the _output_ of the H-bridge going to the input of the transformer? I have no idea if anyone else noticed it. I'm fairly familiar with the use of the Clarke-Hess 2330 myself, though, so I know what to look for on the instrument. I str that .99 poynted out the toroid filters on the patch wiring. He probably noticed the Current bypass too. I'm not sure what effect this filtering would have on the overall measurement problem. Since the Current patch lead is making a series connection with the C-H, going from the H-bridge to the transformer, the filtering would keep spikes out of both the C-H and the transformer. At first I thought maybe the spikes could be sneaking energy into the transformer that was deliberately being filtered out of the C-H. But since the circuit is a series one for the Current, that's probably not the case. If, that is, the C-H is being patched in properly to begin with, which I can't tell from the photo. Performed the whole demonstration with the "input" C-H current input bypassed/disconnected? That's hardly kosher IMHO. Under certain conditions the C-H display will hold the last value sensed, which might explain the 1.53 W starting reading you saw. Here's the brochure with specifications for the C-H 2330. http://www.clarke-hess.com/2330.htmlI recently saw one listed, manual included, for 300 dollars US on Ebay. I have a friend about 100 miles away who has one I can borrow but it costs me about 30 dollars to make the round trip to pick it up, and the same to return it.
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Topic: Graham Gunderson Energy conference High COP demonstration (Read 213452 times)
