<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.6000.16705" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>I have been using the technique Bruce Hoadley talks about - cut several samples of spruce (similar dimensions) to the same weight - 100g is easy to deal with - oven dry one of them to get a dry weight to compare the others with. Sounds straight forward enough.</FONT></DIV> <DIV><FONT face=Arial size=2>Then I compare calculated mc using weighed samples with my hygrometer and the EMC charts and the disagreement begins.</FONT></DIV> <DIV><FONT face=Arial size=2>If conditions are changing, certainly there is a lag time for equalization but the disagreement continues. Also the samples must be placed in the shop so they are representative - still the disagreement continues.</FONT></DIV> <DIV><FONT face=Arial size=2>Probably it would pay to get a much more accurate hygrometer? </FONT></DIV> <DIV><FONT face=Arial size=2>Is the weighing technique really accurate? How would you determine if it was?</FONT></DIV> <DIV><FONT face=Arial size=2>Would it be helpful to add a moisture meter to the lot?</FONT></DIV> <DIV><FONT face=Arial size=2>I am curious how shop folks gain confidence in their technique to measure mc so that if the measurements are telling you the mc is 7% it really is 7% +/- an irrelevant amount?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I can give one example: I use my humidifier to get the rh up to 40% at 95 deg f - this should get my weighed samples up to about 7%rh but they insist on weighing in at 6.1%. Is this a typical discrepancy between cheap hygrometer and weighed samples?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Thanks for any comments. </FONT></DIV> <DIV><FONT face=Arial size=2>Gene Nelson</FONT></DIV> <DIV><FONT face=Arial size=2>Thanks,</FONT></DIV> <DIV><FONT face=Arial size=2>Gene Nelson</FONT></DIV></BODY></HTML>