Quote: (Originally Posted by
jhaaja)
You could start using TX18/45 (or TX18/??) as diluent. Then the ppO2 would not be so high at 60m and you still can breath it OC all the way from surface to surface.
Hem ,
mabye i did not ask the good question then....
Like many I've converted a dolphin ccr kiss style and used the 5 liter tank as the dil tank and the 2 liter bail out as o2 tank.
the consequence is that I had plenty of dil to flush hard and deeply the loop to reduce the ppo2 arround 60m
2 years ago I got rid of the 5 liter dil tank that was destroying my back and replaced it by a 2 liter.
I noticed no difference cause i usualy dive shallow arround 40m
the thing is that i recently decided to dive deeper after 4 years of ccr and then I went down
As a result my deep flushes revealed "expensive" in term of dil pressure making me realize that reducing ppo2 of a rich loop with air or normoxic trimix at 55 m with a 2 liter tank was not really easy.....
what is your experience with 18 O2 mixes , does it drop ppo2 enough during the descent ?
Maybe does it also comes from the way I dive, i start rich to avoid surface hypoxia and get dowm to say 30m and after ward i decend slowly to my max depth following the bottom profile keepping my ppo2 arrounf 1.2 to match my hs explorer fixed set point (i don't use a cell to drive the computer ppo2).
......
well I wil try a 18 fo2 mix and a more direct decent .
mabye 2 dils are not as supid as I thought before
regards
jean mi