Unstable PPO2

schnappi

Hi

During recent dives i noticed that the VR3 seems not to honor my setpoint settings. When i start the dive with the setpoint set to 0.7bar the PPO2 displayed on the VR3 increases with depth. When I switch the VR3 to a higher setpoint, lets say 1.3 bar it keeps the display constantly at 1.3. Switching back to 0.7 bar ends up in the same problem, the PPO2 shown on the screen changes with depth.

When this happens and I switch to a higher setpoint of 1.3 bar for a longer peroid of time (usually 40 mins) and switch back then, the 0.7 bar on the screen is stable (as expected) again.

This seemed to happen randomly so far. I tried switching the unit on before submerging or during descend the result is about the same: Sometimes it happens, sometimes not.

I have the latest 2007 software installed.

Anyone had the same problem or am I doing something badly wrong?


thanks && cheers
--bruno

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Sutty

From what I've seen on my VR3 it assumes your PO2 is at least as high as your selected diluent PO2, ie if air dil then even if you have set PO2 at 0.7 then at 40m it will read 5bar x 0.21 ie 1.05bar PO2.

Neil

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