Am I expecting too much from my barameter. P2 is a month old and I have just fitted an IOSD mini. I have notice that the height reads a bit high ( e.g. 6-8m) at ground level, so today before I flew I monitored it for 10 minutes on the ground, with engines off. When I first switch everything on it seems to show 0m and then quite soon shows 0/1m - fair enough. After 2 mins height shows 3m After 3 mins height shows 4m After 4 mins height shows 5m After 7 mins height shows 6m After 9 mins height shows 7m What I should have done at that point was probably cycle the power and see if it went back to zero and see if the drift had slowed, but it was cold and my battery was already at 94% and I hadnt turned a prop yet. So I flew until it autolanded Can anyone comment on how the barameter should fluctuate? Should I expect to have to let it sit around to normalise before I fly or is it broken ? Thanks.