Quote:
Originally Posted by markem
1. RH meter calibration. 68% on the meter is within tolerances for most meters even if the true RH is 65%. It may just be that for your meter, you have to subtract about 3% (at this time, next calibration, it may change)
2. 65% beads can really be anything from about 62-68%. If the beads are not showing as full of moisture, then you can assume that the humidity isn't really much more than about 1/2% or so above their set point.
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Thanks for the help. I hadn't considered margins of error. I guess if both the gel and the hygrometers are running at the top of a +/- 2% MOE, the hygrometer could be showing something even as high as 69% and things would still be within "acceptable parameters."