O2 sensor values on CCR dives

[Davide DB]

On 17 November 2017 at 21:59, Davide DB <dbdavide at gmail.com> wrote:
> On 17 November 2017 at 19:10, Anton Lundin <glance at acc.umu.se> wrote:
>> On 17 November, 2017 - Davide DB wrote:
>>
>>> Looking to one of my CCR dives (Petrel 2 controller) I realized that
>>> Po2 values reported by Subsurface at the 6 meter stop are way higher
>>> than those recorded and displayed by Shearwater Desktop.
>>> I'm 100 sure that Shearwater Desktop shows correct values because I
>>> perfectly remember O2 values I was seeing at 6 meter: I was never
>>> never never over 1.6 for all the time.
>>> According to Subsurface profile I was all the time at 6m over 1.6 with
>>> spikes at 1.75.
>>> Am I missing something?
>>>
>>> I chose a point in time (122' 50")and I attach three screenshots:
>>>
>>> Shearwater (which display only the AVG pO2)
>>> Subsurface with single pO2 sensor display
>>> Subsurface with AVG pO2 sensor display
>>
>> Could you dump the raw data from the device?
>>
>> It can be done using either dctool or using the predator protocol and
>> creating a device dump.
>>
>>
>> You could probably just send a log file of the download, I think I still
>> got the tool to replay a log file as a download.
>>
>>
>> Then I can take a look at the raw data to try to figure out what's going
>> on.
>>
>>
>> //Anton
>
>
> After depleting one battery here are.
>
> Dctool is a lucky process. 99% of the times I get errors like this:
>
> [73.192176] ERROR: Failed to receive the response packet. [in
> ../../source/src/shearwater_common.c:319 (shearwater_common_transfer)]
> [73.192715] ERROR: Failed to download the dive. [in
> ../../source/src/shearwater_petrel.c:266
> (shearwater_petrel_device_foreach)]
> [73.193107] ERROR: Error downloading the dives. [in
> ../../source/examples/dctool_download.c:218 (download)]
> [73.193712] INFO: Write: size=9, data=FF0105002E902000C0
>
> Raw file for the dive attached
>
> Thanks a lot
>
> --
> Davide
> https://vimeo.com/bocio/videos

Hi Anton,
Did you find the time to have a look at it?

Thank you in advance


-- 
Davide
https://vimeo.com/bocio/videos