Flip,
I guess I wasn't as clear as I should have been. What I meant by "calibrate" was, in its simplest form, "see what the thing *actually* reads when it *should* be reading x ". Most of the processes used for measurement--change in resistance, voltage, volume, etc.--are relatively linear over the ranges we're interested in. Thus, even if the thing isn't accurate in actual vs. as-read, it'll still be possible to use it precisely.
When there's an adjustment that can be made, one adjusts to the calibration measurement. Otherwise, given that you've calibrated the device, you have a good idea that, when it reads "x", in fact the actual temp is "x+y".
Sorry to have been so vague.
Geo
Sooo, you like wine and are looking for something good to read? Maybe
*this* will do the trick!
