Quote: (Originally Posted by
divingabe)
Yes I do mean the reading on the handsets. After calibration it will read 20.9 on air. The next morning it should read the same as when you calibrated and to be .1 off either way would not warrantee recalibrating unless you feel compelled to do so. My view is if it does show greater than .1 off I would then recalibrate.
IMHO .1 is way too much variance for just setting overnite with a fresh calibration. I am thinking that the calibration was done improperly or you have some sensor drift. .01 is much more in the ballpark.
.1 difference is only acceptable (to me of course, you have to decide for yourself) after about 3-4 hours of diving. I would consider it drift from moisture in this instance (happens to me every time at about 3 hours). This is usually done in four dives of 1 hour each during the course of a day.