On 28 January, 2015 - Willem Ferguson wrote: > On 26/01/2015 11:32, Anton Lundin wrote: > >On 24 January, 2015 - Willem Ferguson wrote: > > > >>Hallo Anton, > >>Following our last emails, I was trying to encourage you to to tell me more > >>about your feelings on the representation or interpretation of CCR o2 sensor > >>data. Instead of just showing raw graphs of the sensor data, you felt there > >>are better ways to deal with it. Please, would you be prepared to share some > >>of your thoughts? > >If i had them well formulated.. But here is a quick brain dump. > > > >First we need to look at the rebreather head design. The design of both > >the Pelagian and the Poseidon rebreathers are such that the cells are > >exposed to different gases and can't be directly compared to each > >other all the time. So special techniques needed to validate the sensor > >values from those. > > > >For all other rebreathers i know about they have all there cells in the > >same place, reading the same gas, that includes AP, Meg, JJ and so on. > > > >What I'm proposing is comparing the actual response of the cells between > >each other. When you go down 30 meters in 1 minute, the response of the > >cells are supposed to be X, and what did the different cells actually > >read? Where any of them slow to react? Did any of them reach a current > >limiting state? Are the response changing within a statistical > >certainty during the dive, or over a range of dives? > > > >This would put our software in a unique situation to provide the diver > >with early warnings about the cell performance. > > > > > >//Anton > > > > > This is a mouth full! Thank you very much. This requires discussion among > CCR divers. I am not convinced that the manufacturers even have good > knowledge on this. This is possibly why several of them have systems in > place to receive dive logs from CCR divers. You gave a lot of food for > thought. I will keep this in mind. Thank you.
A tip is to CC the subsurface list, if and when someone else would like to chime in on the discussion, and for the collective memory. //Anton - Dropping this to the list for that reason -- Anton Lundin +46702-161604 _______________________________________________ subsurface mailing list [email protected] http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface
