Newbie question Phillips 560

When looking at the sleep time on the info screen, does it represent just the time since I put on the mask, or total time I slept in one evening...Does it reset every time I shut off machine during the night to get up and go to the bathroom? Can't seem to figure this out, and I do get up several times to use the bathroom. TIA
Telly

The time represents all time during a 24 hour period where it detected breathing. I believe your machine sets its time to one specific time zone, so when it resets will depend on when it thinks it is noon. Others here can answer that part better. But all of your individual sessions will add up during the 24 hour period of time. If the machine is left on with nobody attached, that time won't count. But any time (asleep or awake) with you breathing into the mask, that will count.