On Fri, Sep 26, 2014 at 3:10 PM, Robert Helling <[email protected]> wrote: > > I am a bit in a rush, so only briefly: > > I discussed this a bit some time ago with John Kendall (one of the GUE > instructors and SCR divers). > > It should be safe to only use the steady state solution of the time > dependent O2 content (as it is reached very quickly). > > I have a piece of paper with some calculations and a boxed equation that > says > > ppO2_ss = ppO2_in - (1 -fO2_in) * O2consumption / (SAC * r) > > where O2consumption is what the body metabolizes per minute (in l/min) and > SAC is the surface air consumption (in l/min) and r is the ration of droped > gas in the rebreather. Those three parameters should be gotten from the > preferences/UI somewhere. > > Does that help?
Yep. I'm fully GUE certified but.. I got the SCR training on the dark side :) I'm in a rush too, I remember that the formula I was teached was: P02real = FO2 (K * RV * ATA +1) - 1 / K * RV Where: RV = ratio between inner and outher reb bellows (r in your formula). K = K factor = SAC / =2 consumption (metabolized) per minute. A tipycal value would be 20/0,8 = 25 I think it's the same. Now I'm on the phone and it was a task just writing this :) Anyway it would be nice having such feature. Bye _______________________________________________ subsurface mailing list [email protected] http://lists.hohndel.org/cgi-bin/mailman/listinfo/subsurface
