On Tue, 28 May 1996, Richard Pyle wrote:

> Perhaps a better community standard would be to require all  SCR
> students to become familiar with their own O2 consumption characteristics
> at different workloads during the training course, using a special
> version of the rebreather they're being trained on that is equipped with
> O2 sensors.

There is a much cheaper way to do this: If the student excercises (say on
a stationary bicycle) at 1.0 ATA wearing/using the SCR as a breathing
source, the VO2 can be calculated at a worst case scenario. I think this
would be a useful part of standard rebreather training and would not add
appreciably to costs.

> > 5.  The SCR must deliver a volume of gas at the MOD that exceeds the
> > minute volume of the user by at least 10%.
> >
> > Others may disagree, but I think this is *minimal* to blow off CO2.
> >
>
> But isn't the CO2 being pulled out of the loop by the absorbent canister?

The CO2 is being absorbed by the canister *after* you get it out of your
body. If I deliver a pPO2 to you of 1.2 ATA but in a volume of 150cc, you
wont't run out of O2, but you will become hypercarbic, because I am not
meeting your minimum minute respiratory volume needs.

- ph

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