| Re: PO2 Set-points (WHEN!) First I would learn to use your setpoint changing manually, that will get you used to check where you are and when it should be switched, and confirming that it does. When you are familiar with that you could use the auto function and as a rule of thumb and depending on the type of dive to be done, I would switch from low to high at or near reaching my target depth. The switch back to low can be just after leaving your 6m deco/safety stop, say 4m!
these points can be used in manual switch mode and auto switch mode
HTH
Dave |