Quote:
| Originally Posted by kinetic I am a bit curious, knowing little about rebreathers at this time but, I understand that the comp on board top range models, will adjust the pp of O2 as you descend/ascend. Am I right in thinking that the trimix rebreather does exactly the same as diving trimix OC and just keeps the N down? |
You have two gases available to a CCR. Pure Oxygen and a Diluent. The diluent supplies the inert gas fraction of the loop but has some oxygen in it to make it breathable. If your diluent is air the loop is always a nitrox with the oxygen percentage adjusted by either a manual, automatic or mechancal mechanism. If the diluent is a trimix the ratio of nitrogen to helium in the diluent is mirrored in the loop. So if you have 20/40 trimix 40% N2 and 40% He on the surface the loop might be 70% oxygen so the rest will be 15% N2 and 15% He. At 70 meters the oxygen would be adjusted to something like 1.3 bar so 16% and the remaining inerts would be about 42% each. The ratio of the inerts in the diluent is the ratio of the inerts in the loop. Only the oxygen changes.
I think you need to research trimix before this makes much useful sense.
PS: Stay away from rebreathers. They are adictive.