CPAPtalk.com

Pugsy wrote:

Bertha deBlues wrote:I can change the time on my Philips Respironics DreamStation AutoPAP by going into "my setup" then "clock." I can only change it in 30 minute increments, and it's always 5 or 6 minutes behind the actual time, but I don't worry about that. I change it when we go on and off DST and also when I travel to another time zone. Personal preference.

That's only for the time zone. It doesn't really change the internal clock as evidence by your machine always being 5 or 6 minutes off.
You can't really get to the internal clock to correct the time. Known issue with Respironics machines....internal clock drift.
I am not sure what function setting the time zone might do with the DreamStation machines unless it affects the reporting session cut off time where a new reporting "day" gets started which is noon GMT time.

Now with the ResMed machines we can go in and change the actual minutes as well as hour if we wanted to. We can really "set the clock" to the time if we want to and have it be 100% correct.

Yeah, it's one of those times when I say "it's close enough." The first time we traveled half a world away, and I realized it was splitting what was for me one night's sleep into two separate nights - that's when I learned how to adjust the time so at least one night would be recorded as one night. There are probably ways to "unsplit" a night, but for me the easiest route was to simply change the time as best I could. * shrug *

So if I sleep Sunday from midnight to 6am, that's really 7 hours. Will my PR machine know that? Will Encore? Will Sleepyhead?

This will be interesting.

The clock drift thing has given me some odd results on the local screen, but I don't get compliance-checked so no biggie.

sc0ttt wrote:So if I sleep Sunday from midnight to 6am, that's really 7 hours. Will my PR machine know that? Will Encore? Will Sleepyhead?

This will be interesting.

The clock drift thing has given me some odd results on the local screen, but I don't get compliance-checked so no biggie.

We'll have to compare notes. I plan to set my PR machine back one hour before bed on Sunday evening. Compliance is not a concern for me, either.

Uncle_Bob wrote:I made things simple by moving to Arizona

My husband and I lived briefly in hell--er, I mean Yuma, AZ--and he worked in El Centro, CA. Daylight savings time made things crazy for us. He would often arrive at work after a nearly hour-long drive before the time he left our house, while his commute home took 2 hours by the clock.

It made me crazy trying to keep track! Not simple for us.

sc0ttt wrote:So if I sleep Sunday from midnight to 6am, that's really 7 hours. Will my PR machine know that? Will Encore? Will Sleepyhead?

It's always a crap shoot what the software reports show when falling back. I have had "double" reports for than hour meaning 2 different pressure line, leak lines and events flagged superimposed on top of each other. When springing forward it's usually just a blank hour on the graphs.

I always tell people to expect weird data/looking reports for the first day or two after the time change.
SleepyHead just reports what the machine does and when I had weird reports the other software (ResScan or Encore) always was weird too.

If they get weird looking reports it's no big surprise and if they don't it's a pleasant surprise.

You ResMed people though....remember don't try to change the clock backwards when there is data written for that reporting period. The machine won't want to do it without erasing the whole darn card. I had to do it once because when I was changing the clock I accidentally changed the calendar forward a day and it totally screwed things up. The only way to fix it was erase the card and then change the calendar.

Best thing is to change the clock (if that is what you want to do) right before bedtime...either Sat night or Sun night assuming you have had no data from noon to bedtime. Don't wake up Sun morning and try to change it at 7 AM...the machine won't want to do it.

Before I got a "real" job, I worked in retail--specifically fine jewelry.
We sold railroad watches, which have to be accurate within "x" seconds; which seemed a bit ridiculous,
because it was never my impression that railroad schedules were seriously adhered to.
Several railroad employees agreed with this observation-off the record, of course.

Bertha deBlues wrote:

Pugsy wrote:

Bertha deBlues wrote:I can change the time on my Philips Respironics DreamStation AutoPAP by going into "my setup" then "clock." I can only change it in 30 minute increments, and it's always 5 or 6 minutes behind the actual time, but I don't worry about that. I change it when we go on and off DST and also when I travel to another time zone. Personal preference.

That's only for the time zone. It doesn't really change the internal clock as evidence by your machine always being 5 or 6 minutes off.

- that's when I learned how to adjust the time

On a respironics, you can't adjust the time, you can only change the timezone offset.

chunkyfrog wrote:... We sold railroad watches, which have to be accurate within "x" seconds; ....

My dad was a locomotive engineer (steam, then later diesel electric). You reminded me that as a young kid, he would double-park while I carried his watch to the jeweler for comparison and adjustment.

poppi2 wrote:

chunkyfrog wrote:... We sold railroad watches, which have to be accurate within "x" seconds; ....

My dad was a locomotive engineer (steam, then later diesel electric). You reminded me that as a young kid, he would double-park while I carried his watch to the jeweler for comparison and adjustment.

Now I have visions of xxxzx with a dog chain around his neck, with a two bell alarm clock on it, that doesn't run , but is still correct twice a day. He's also a engineer too. Toot! Toot! Jim

poppi2 wrote:

chunkyfrog wrote:... We sold railroad watches, which have to be accurate within "x" seconds; ....

My dad was a locomotive engineer (steam, then later diesel electric). You reminded me that as a young kid, he would double-park while I carried his watch to the jeweler for comparison and adjustment.

And, it was actually the railroads that created the time zones in the U S and Canada.



November 18, 1883 : Railroads create the first time zones

At exactly noon on this day, American and Canadian railroads begin using four continental time zones to end the confusion of dealing with thousands of local times. The bold move was emblematic of the power shared by the railroad companies.

The need for continental time zones stemmed directly from the problems of moving passengers and freight over the thousands of miles of rail line that covered North America by the 1880s. Since human beings had first begun keeping track of time, they set their clocks to the local movement of the sun. Even as late as the 1880s, most towns in the U S had their own local time, generally based on “high noon,” or the time when the sun was at its highest point in the sky. As railroads began to shrink the travel time between cities from days or months to mere hours, however, these local times became a scheduling nightmare. Railroad timetables in major cities listed dozens of different arrival and departure times for the same train, each linked to a different local time zone.

Efficient rail transportation demanded a more uniform time-keeping system. Rather than turning to the federal governments of the United States and Canada to create a North American system of time zones, the powerful railroad companies took it upon themselves to create a new time code system. The companies agreed to divide the continent into four time zones; the dividing lines adopted were very close to the ones we still use today.

Most Americans and Canadians quickly embraced their new time zones, since railroads were often their lifeblood and main link with the rest of the world. However, it was not until 1918 that Congress officially adopted the railroad time zones and put them under the supervision of the Interstate Commerce Commission.

palerider wrote:

PaulKTF wrote: noticed that my machine doesn't automatically change the time on its' own which is kind of annoying.

Every country has it's own version of Daylight Saving Time, And some places are forever dicking with it, so putting that into the cpap would be an unnecessary complication.

I'm surprised they don't just manage it with firmware and the cell data.

palerider wrote: On a respironics, you can't adjust the time, you can only change the timezone offset.

Thank you, Diamaunt.

Bertha deBlues wrote: Thank you, Diamaunt.

Did you mean: Diamante?

PaulKTF wrote:I'm surprised they don't just manage it with firmware and the cell data.

That would be overly complicated. Keep in mind these are sold world wide and originally patients didn't have access to the data so the times are updated when the computer displays the data. Not to mention there was no cell signal (nor was there an internet) when these were first designed. And there are still places that have NO Cell signal.

Also Keep in mind there have been some minor changes to the dates when we go into or out of the time changes. I still have clocks that change when they are ready.

Maybe future cpaps will but right now I am happy not to have another thing to worry about changing over tonite or tomorrow.

Guest 360 wrote:

Bertha deBlues wrote: Thank you, Diamaunt.

Did you mean: Diamante?

Palerider is known as diamaunt on another cpap forum. I learned something by looking up diamante.

Bertha deBlues wrote:

Guest 360 wrote:

Bertha deBlues wrote: Thank you, Diamaunt.

Did you mean: Diamante?

Palerider is known as diamaunt on another cpap forum. I learned something by looking up diamante.

And...What's your name on that other forum?