miketsp
Contributor
Red Sea Shadow:Ditto to what Charlie said.
I have a Suunto Vyper and I changed the default maximum depth from 50 meters to 70 meters. Frequently the computer gives me deco warnings but I ignore them and complete the dive, then make the "required" deco stop. However, I never set it to Nitrox while I'm using normal air.
Changing max depth parameter will only change the depth at which it gives you an alarm.
It shouldn't change the algorithm.
Most Vyper users that are Nitrox qualified learn very quickly that you should always leave it in Nitrox mode at 21% because otherwise you can't change the setting in the middle of a dive series. If I remember rightly not until the no-fly timer has zeroed.
You may do a first dive with air and then the boat will find a spare Nitrox cylinder left over and offer it to you. Or some diver that paid extra will be seasick and abort his dive.
As for upping the Nitrox setting to make the computer more aggressive. The results are of course unpredictable but I do know a few DMs working holiday locations, up to 5 dives per day every day on very well known profiles, that do nudge the setting up 1 or 2%. I wouldn't do it or recommend it but for some people in specific circumstances it's an option.