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Andy:
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OK. I have to be more clear here: What I mean is that if you are NOT flushing or making good use of available instant cell validation by putting small amounts of DIL across the cell faces at regular intervals and INSTEAD put your trust in the slightly better odds that two similar readings are right and a third different reading is wrong, then you are on your way to statistics.
Not meaning to be argumentative but Im not sure of your comparing apples with apples in your eg above
Compare 2 cells with instant cell verification to 3 cells that you dil flush when they show up that there is any variance...
Instant cell verification is just a fast dil flush - something thats taught on every ccr course as something you do if you have cell variances in a 3 cell system.
I agree if your not dil flushing to verify when a 3 cell system gives a variance that this isnt as safe as 2 cells that your are verifyijng - but who wouldnt flush in that situation??? it is SOP. (or at least its supposed to be )
Anyone can do a dil flush on any unit - maybe not as fast as on your - but it can be done - and is done. It would be cool if ot could be done faster as you seem to have set up - a good idea,
As for calculating ppo2 easily at deep depths -i pressume your joking re additional helium. N2 is only part of the dumbifying effect and personally after a fast descent even on heliox Im as thick as pig sh1t sub 150m
and deep = helium and thats where Im working hard and is therefore (He and exersion being high trigger to tox) where Im most concerned about too high O2 so deep is where Id want to flush (if I was diving a 2 cell system) = lots of dil (ordinarily)
My bob had fast cell verification for just the reason yours does - but I had 3 cells and would only flush if there was a variance as Im as thick as pig sh1t and too busy trying to do the dive
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I guess thats one way to look at it:
whats safer (jn all aspects) : 2 cells with instant flush or 3 cells which if they show any variance can be instant flushed? Hmm I may have to mod the RAT to give fast verification.....
I agree there is a lot to be said for flushing cells at depth at intervals - regardless of what number of cells one is using and having a fast way to do that is a neat advantage - do you think this could help clear water off cell faces - I recall years ago the 'puffer' was tried