Incorrect number of Therapy Hours listed by PR System One?

[WhatMeSnore]

My PR System One BiPAP shows the total number of Therapy Hours for the past 24 hours, but sometimes it just seems wrong. Last night I'm sure I wore the mask for a good amount of time, yet it only shows 1 hr 45 min for the past "1 Day" as it calls it. Am I wrong or is it wrong or what?

I just checked the humidifier and it's almost empty though I refilled before going to sleep. It was set on 3 most of the time but I changed it to 4 toward the end of my time wearing the mask - my tongue was dry as...toast!

[Cowboy Casey]

What does sleepyhead say? I think mine has had wacky hours also but when I look at SH it is correct... I hardly ever look at the LCD screen to get info...

[palerider]

I *believe* (pugsy, check me) that the PRS1 machines roll over the 'day' at what the think is 12 noon *GMT* there's no way to set the clock to local time or compensate for clock drift, that's why sleepyhead (and I think encore) has an clock offset correction setting to compensate for that.

so, basically, if you sleep 8 hours but 1.5 of them are past when the machine thinks noon is, it'll show 1.5 hours of use for that day.

[library lady]

Sleepyhead sometimes incorrectly gauges amount of time slept... today I slept in, woke up and turned machine off at 9:30, but on looking at sleepyhead, I slept until 3 PM in spite of my sitting at my computer looking at the graphs at 10 AM... go figure. I've had that happen several times and I've learned that it's just a glitch... odd, but a glitch. I checked the LCD and I can see that the flow rate on graph stopped at about the time the LCD says it should have... yet some events are still being flagged... weird.

[palerider]

Sleepyhead sometimes incorrectly gauges amount of time slept..

did you ever get around to installing a more current version of SH?