Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account


New Posts   Today's Posts

Date/time?
#1
Anyone know how an xpap gets the date/time/DST so sleep data is accurate? No clock in admin setup screen. Have a PR System One A-Flex.
Post Reply Post Reply
#2
Hate to break it to you, but the PR machines have a known clock drift problem.

PR machines are set to GMT at the factory.  Both the Encore and SleepyHead software used to read the data use the computer's time zone as the default time zone for the user of the machine and they automatically adjust the GMT time stamps to get times for the local time zone.

But over time, the PR clocks do drift, and as near as I know there is no way of correcting that drift. In SleepyHead, you can adjust the times in the detailed reports if you figure out (approximately) how much drift your clock has accumulated.  PR clocks can drift both ways---i.e. over time, the PR time stamps can be either earlier or later than the actual time.

In my case, my old PR System One Series 50 BiPAP's clock was approximately 40 minutes too fast (as I recall) when I retired that machine in October 2016. My current PR DreamStation's clock is already running about 3 1/2 minutes too slow; I got the DreamStation in October 2016.

I did complain at some point to my DME about the clock drift problem on the System One. If I recall correctly, their response was that the machine would have to be sent back to PR to have the clock reset. It was easier to just live with the clock drift and use SH's adjustment to keep my SH data reasonably accurate.
Questions about SleepyHead?
See my Guide to SleepyHead
Post Reply Post Reply
#3
Thanks Robysue for the quick response. Seems my cpap has drifted. I'll note the start or stop time & determine how much. Thanks for the SH tip. Didnt know the app has time drift compensation. I'll apply it.
Post Reply Post Reply


#4
42 minutes fast...
Post Reply Post Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  time for ASV? lionel197 22 1,073 8 hours ago
Last Post: Walla Walla
  ResMed Airsense 10 Setting Date Problem Reuven Gruber 10 922 10-13-2017, 10:46 AM
Last Post: jaswilliams
  ACCESS Machine Blower Time zzzZorro 3 121 10-11-2017, 02:29 PM
Last Post: Sleepster
  [Equipment] New sleep apnea patient here using oral device for first time liz81 17 1,198 08-23-2017, 09:11 PM
Last Post: Romster
  Time for a new machine ?? GrammaBear 8 345 08-10-2017, 11:33 AM
Last Post: GrammaBear
  Date not Changing on M Series Remstar redmed 1 121 08-04-2017, 08:20 AM
Last Post: Sleeprider
Question very casual relation between AHI and sleep time CPAPreturnee 2 241 07-31-2017, 02:53 PM
Last Post: CPAPreturnee

Forum Jump:

New Posts   Today's Posts




About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.

For any more information, please use our contact form.