No problem. Today dive. Again a small offset between Shearwater desktop and Subsurface pO2 values.
Am I the only one with a Petrel controller ccr? Jan? davide@mobile Il 01 dic 2017 23:20, "John Smith" <[email protected]> ha scritto: > > > On 1 Dec 2017, at 20:39, Davide DB <[email protected]> wrote: > > Yes I know perfectly how calibration works. I meant how po2 is calculated > from downloaded data. > > Sorry, I wasn’t making myself clear. The point I was trying to make was > wondering how libdivecomputer takes the individual cell calibration into > account as there doesnt seem to be any calibration values in the log file. > > It's a completely different story. > > Am I the only one with a Petrel controller here? Maybe other user can > confirm if their pO2 values are correct. > > I was thinking about whether I could time match data from my AP handset - > which shows PPO2 for each cell against my ext petrel data. The following > graph shows the data extracted from subsurface. > > > > I know there is a small difference between the two computers, I see that > during calibration, but I cannot see anything major in this particular > dive. > > > > davide@mobile > > Il 01 dic 2017 7:38 PM, "John Smith" <[email protected]> ha scritto: > >> >> What I do not understand is how this conversion was made the very first >> time. I mean how did you reverse engineered those values? I mean did you >> have a reference data set (mV, calibration K and resulting po2) to compare >> against? >> >> Surely every time you run the calibration routine on the shearwater there >> should be a new calibration value (calibration k) for each cell. The PPO2 >> is then a linear calculation based on this. >> >> >> >> _______________________________________________ >> subsurface mailing list >> [email protected] >> http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface >> >>
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