CCR o2 sensor data

[Anton Lundin]

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