| Re: Inacurrate PPO2
Reefhugger,
I may be wrong, but I think this depends on which version of the VR3 you have. If I understand it right, your VR3 takes ambient pressure into account while calibrating. If you calibrate at "normal pressure" in air, both your fO2 and PO2 will be 0.21. However, if you calibrate at increased ambient (higher pressure due to wheather), your PO2 will be higher than your fO2. So the reading of PO2 on your VR3 may actually be the correct one.
If you compare this to your KISS handsets than there will be a discrepancy because you manually calibrate the handset and assume PO2=0.21 when in fact PO2 (not the fO2!) is higher.
The discrepancy should be minimal however, and your PO2-sensor itself only has an accuracy of 0.01. If it bothers you you might want to consider taking ambient pressure into account when calibrating your KISS-handsets.
Hope this helps.
Joerg |