Quote: (Originally Posted by
Tino Corp.)

You are right, this is the only solution I see but I was taught not to switch off the O2 when there is no problem of the machine. And here this is only a bad diluant choice ...
I sort of agree. I would be very uncomfortable having my O2 switched off. I would probably spend those four minutes ignoring the wreck and doing nothing but staring at my displays until I could turn my O2 back on again!
Janos