Quote:
Originally Posted by Rodger Knox
No, that is not calibration, which requires more than one data point and adjustment to match all the data points.
It is plenty good enough for practical purposes.
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I think this may be veering into semantics . There is such a thing as one-point or single-point calibration. If you look up methods for calibrating analog hygrometers, a standard method is to wrap the hygrometer in a damp cloth or paper towel and after 30 minutes check to see if it reads 95%. If it does not, you adjust the screw on the back so that the indicator reads 95%. An example of single-point calibration. Alternatively, salt tests are recommended. Again, single-point calibration but to a different RH value. Calibration to 95% obviously assumes that the hygrometer's response to RH is linear over its range, which it may not be. If it's not, calibrating to 95% may result in inaccurate readings in the 45% range. Which is why doing a single-point calibration with potassium carbonate at 43% makes send for guitar owners and builders.