> How are people who are talking about low EMC's in the 4% > range quantifying their as built EMC's? > > Same question for those of us in the higher EMC Ranges. This gage goes where the panel or ribbed assembly goes, be it the hot box, or the shop. Since it's made of similar stuff as the panel, the assumption is that it will react to moisture at a similar rate to the panel, and I get a direct MC reading without thermometers, RH% meters, or conversion tables. It's a strip of soundboard panel mounted in a frame so it can expand and contract unconstrained. The length (cross grain) of the panel is calculated and calibrated so overall length change is 0.010" per 1% MC change. It's read directly by a dedicated dial indicator, which Harbor Freight sold for under $7. The reading on the dial in the photo is 8.8% MC. Hard to see at this low resolution. That's how I do it. Ron N -------------- next part -------------- A non-text attachment was scrubbed... Name: MC gage.jpg Type: image/jpeg Size: 45072 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080130/cc6f2862/attachment-0001.jpg
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