Given the good relationship between Subsurface devs and Shearwater wouldn't it be easy to ask them some more info on this topic?
On 11 December 2017 at 16:53, Anton Lundin <[email protected]> wrote: > On 11 December, 2017 - Davide DB wrote: > >> On 11 December 2017 at 15:59, Anton Lundin <[email protected]> wrote: >> > On 11 December, 2017 - Davide DB wrote: >> > >> >> On 11 December 2017 at 10:16, Anton Lundin <[email protected]> wrote: >> >> >> I calibrate my two Petrels ALWAYS when I assemble my unit as part of >> >> >> my checklist and ALWAYS the same day I dive and. No calibration No >> >> >> party. >> >> >> I made other dives and all of them show the same error. Shearwater >> >> >> desktop tell me that everything is ok (like my Petrel underwater) >> >> >> while Subsurface reports pO2 over 1.6. >> >> >> Thank you for the detailed explanation. >> >> >> Where do we go from here? >> >> > >> >> > Is this a divecan unit or something? >> >> > >> >> > I'm just guessing that it might affect how/where the cal factors are >> >> > stored. >> >> > >> >> > >> >> > //Anton >> >> >> >> Yes, divecan unit. >> > >> > There we go. Thats probably why its the factory default cal factors that >> > are stored in the header, and not the real ones. It might be that the DC >> > doesn't even have them, and its only the sensor board which know them >> > for real. >> > >> > >> > My suggestion then is to not show individual sensor ppo2's, if the cal >> > factor is 2100, and just emit the average ppo2 then. >> > >> > At least that one is accurate. >> > >> > >> > The best would be if we had a interface which let us both expose the >> > average ppo2 and the raw mV values. >> > >> > >> > //Anton >> >> Hi Anton, >> >> The strange thing is that also the other dataset from my dive friends >> came from divecan units (JJ). >> IIRC those dataset haven't this problem. > > When I read the thread again, from the snippets Jef posted all those > have cal factors of 2100, so I'm guessing those ppo2-values are > inaccurate to. > > > Jef: could you verify this against the average ppo2 in those mem dumps? > > > //Anton > > > -- > Anton Lundin +46702-161604 -- Davide https://vimeo.com/bocio/videos _______________________________________________ subsurface mailing list [email protected] http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface
