Question Running a rebreather on only dilluent

[Tom_Ivan]

Continuing my barrage of rebreather questions.

Any reason you couldn't theoreticlly run a rebreather on dill only? I guess you'd have to accept your PO2 would flucuate and it would have to be a manual CCR as an automatic would keep trying to inject O2 to get to a setpoint that is potentailly impossible with your dill mix?

 

[scubayinzer412]

If iam Not wrong, that would be SCR Mode

 

[davehicks]

If iam Not wrong, that would be SCR Mode

Correct. You should do this in training. But not something you should plan to do on purpose.

 

[Tom_Ivan]

...But not something you should plan to do on purpose.

Any paticular reason? I realise it wouldn't be ideal as far as PO2 etc is concirned

 

[Alekseolsen]

If you want an SCR purchase an SCR In SCR mode you breathe the loop content a few times (higher PO2 on DIL means you can breathe it more times), and then vent, refill DIK and repeat. VERY useful for getting your sorry ass out of a cave (uses a lot less bailout gas), but comes with the price of longer deco (given lower PO2), and would be very annoying as "default dive mode"

 

[davehicks]

Any paticular reason? I realise it wouldn't be ideal as far as PO2 etc is concirned

It is a pain in the ass to do, not automomic, and not something you can do while enjoying other standard pleasures of diving. It's a fallback when other sh@t goes wrong, more dire than bailing to oc, which would be the first bailout option.