Two hour time difference when importing SpO2 data in OSCAR

[Chrisk100]

Hi, I am Chrisk100 from Amsterdam.
Since September 2019 I use Philips Respironics DreamStation, Auto CPAP combined with Philips full face mask.

Ubuntu 18.04.4 LTS, 64 bit,Intel® Core™ i3-3217U CPU @ 1.80GHz × 4.
OSCAR 1.0.1-r-1 (linux x86_64) built with Qt 5.9.5 on Apr 24 2019 15:49:32

A few day ago I got a Contec CMS50D+ Oxyigen meter and wanted to combine the data in OSCAR.
Unfortunately importing the data goes wrong. There is a time difference of 2 hours.
I cannot set the right hour difference in OSCAR. See screenshot and I cannot change the UU characters to provide OSCAR with the correct start time.
See also screenshot with graph data from OSCAR, where the Oxygen data has shifted  two hours.
I hope to find some help here to solve this problem. Thank you.

           

[untoutseul05]

In Oscar, there is a parameter to shift the hour.

On your profile, you have to choose the good timezone.

File --> Preferences --> CPAP. On the widows which is opened, you have a square named CPAP Clock Drift.

I need to put 2 hours : I think on data import, hour is in UTC. (I'm in France (timezone is UTC + 1). But, now it's UTC + 2 because DST).

[Chrisk100]

[attachment=23602]
Thank you for your suggestion. I have tried it, but it does not solve the issue.
I do not have a problem with CPAP time, but a problem with the time when I import data from contec CMS50D+ oximeter. The CPAP and Oximeter recording have been started at the same time, but when I first import CPAP data in OSCAR everything is fine. In the next step I want to add the data from the Contec Oximeter, which does not have a clock of its own. It should use the same start time as the CPAP datarecording time, but it shifts the SpO2 data to two hours earlier.


I tried your solution, but that only shifst the CPAP data two hours. That way I end up with wrong CPAP starting time (it is now two hours to early). This solution has 1 advantage, that CPAP and Oximeter graphs are in sink now and start both at the same time, only both are showing the wrong time.


======later on =====


I have been playing a little bit more with your suggestion and found a workaround, although its a bit complicated ;-}
First, I read in the CPAP data in OSCAR;
next I turn the OSCAR clock 2 hours forward as you suggested
then I read in CMS50D+ oximeter data
next I set OSCAR clock back 2 hours, so OSCAR is in its regular time again.


Now the CPAP and Oximeter data graphs are completely synchornized in time!

[Jeff8356]

There is a new version of OSCAR available, version 1.1.1
Try upgrading and see if you still have issues. You may need to clear you browser cache to see the newer version....

[Chrisk100]

Thanks, I will try OSCAR_ 1.1.1 next week.

[GuyScharf]

A few day ago I got a Contec CMS50D+ Oxyigen meter and wanted to combine the data in OSCAR.
Unfortunately importing the data goes wrong. There is a time difference of 2 hours.

Please update OSCAR to the current version 1.1.1.  We did fix a problem with timezone shift in oximeter import after 1.0.1 was released.  Maybe that is what you are encountering.

[Chrisk100]

Thanks to everyone for the helpful suggestions. I just installed version 1.1.1. This has resolved the clock problem.

[unidee]

I had two hour difference with oximeter graph when daylight saving time changed to summer time. And Resmed Airsense 10 cpap machine clock was in winter time.

Check the cpcp machine clock that time is correct. Then check oximetry clock that it's time is correct. And computer, check that it is correct time.

[Dugy40]

File,preferences.cpap.  Time shift.  Try -2 hours.  If that’s wrong change to +2 hours.   It fixed mine.