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Drmike · 4th May 2006, 15:12

Quote: (Originally Posted by AD_ward9)

Attached is a verification model for the CNS calculation.

The margin needed to meet the 1 billion hour requirement for avoiding O2 convulsions may be controversial (Section 7).

The model provides a formal specification and model for integer implementations as well as floating point. The actual code, both the Verilog version and the C version, is then run against the model, in Monte Carlo simulations, to validate the correctness of the implementation.

As usual, all constructive comments welcome.

Cheers,

Alex

Hi Alex,

What validation has ever been done on these CNS limits?

I ask because it seems to me that many divers exceed them regularly and some divers (myself included) routinely do dives with huge CNS% with no ill effect.
I know its hardly subjective but when you have divers doing dives with huge% CNS it does make a bit of a mockery

4th May 2006, 15:12	#12 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,300	Re: CNS Calculation and Verification Model Quote: (Originally Posted by AD_ward9) Attached is a verification model for the CNS calculation. The margin needed to meet the 1 billion hour requirement for avoiding O2 convulsions may be controversial (Section 7). The model provides a formal specification and model for integer implementations as well as floating point. The actual code, both the Verilog version and the C version, is then run against the model, in Monte Carlo simulations, to validate the correctness of the implementation. As usual, all constructive comments welcome. Cheers, Alex Hi Alex, What validation has ever been done on these CNS limits? I ask because it seems to me that many divers exceed them regularly and some divers (myself included) routinely do dives with huge CNS% with no ill effect. I know its hardly subjective but when you have divers doing dives with huge% CNS it does make a bit of a mockery __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
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