possible O2 PP display bug

[Dirk Hohndel]

On Mar 2, 2013, at 4:49 AM, dave remling wrote:

> HI,
> 
> Great to see a new dive planner.  Just found out abut it via the post in Rebreather World.
> 
> I note some anomalous spikes in O2 partial pressure that may indicate a bug in the extrapolation procedure.
> 
> I am running a Predator on a rEvo (computerized.0  Sampling is at 10 second intervals.  I have looked at the XML dump of the computer log and the O2 levels are normal.
> 
> The problem seem to ocure when hanging on deco.  I note that a slight decrease in depth, followed by slight decrease seems to trigger the indicated spike.
> 
> for example over a 10 second interval:  starting depth 39.8 feet, O2 1.09 ending 41.5 feet, O2 1.3
> 
> In the middle of this period Subsurface shows an O2 spike to 1.9. As there is no dive computer data available for this period I must assume it as an artifact of calculation.

Linus just yesterday found a bug in the code that saved the pO2 values and what you are seeing could be a result of that bug.

I assume you are observing this after you saved the dive with Subsurface and then re-open it?

Can you build from source (if not, tell me what platform you are on and I'll get you a binary)? The latest git should fix this - but it requires you to re-download from your divecomputer, I'm afraid.

/D

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