| The important thing is that they can read over your setpoint, as Garth says. Your c'lung doesn't have to be pure O2 though, you can just inject O2 manually instead of dil through the ADV to bring them to a level your happy with.
Also, 1.5 at 6m is normal. My theory is this is because the loop is 100% humid at the end of a dive, so cells will underread by 5%.
Janos
__________________ You can lead a horse to water but you can't climb a ladder with a large bell in both hands - Vic Reeves
DO of Hellfins |