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Really strange mask pressure reading
#1
Really strange mask pressure reading
Last night I had an utterly bizarre mask pressure blip right before a couple of events.
[Image: OddMaskPressure.png?raw=1]The flow rate did a wild gyration, while the mask pressure did an even wilder ride. The pressure curve didn't budge, until the two OAs caused it to nudge up a bit. But during that wild jump there was nothing else really going on -- a tiny leak, no flow limits.

It almost looks like some sort of bug in the code that's processing the sensor data? The machine can only put out a pressure of 20 -- it would take some serious violations of the laws of physics to generate a mask pressure of 40 out of that, LOL. Here's a one-minute closeup of the weirdness:
[Image: OddBlipCloseup.png?raw=1]
Did I stumble upon some sort of bug in the Air11 code?
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#2
RE: Really strange mask pressure reading
Question: did your mask vibrate when this happens?
It could be due to mask leak the leak graph is detecting leak and maybe motor trying to compensate it
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#3
RE: Really strange mask pressure reading
Ok, I know what it was -- a sneeze!

Last night right after I turned the machine on I sneezed three times.
[Image: 3Sneeze.png?raw=1]
(Full sequence of events: masked up, powered up, realized that I forgot to plug my cell phone in for the night, turned machine off and unhooked the hose and grabbed my phone, hooked the hose back on and restarted, settled into bed, sneezed 3 times.)

Here's a closeup:
[Image: 3SneezeCloseup.png?raw=1]
So that means that the 11-second OA a minute later would count as sleep-wake junk, too.
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#4
RE: Really strange mask pressure reading
God-Bless you! (x3) Big Grin
Crimson Nape
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#5
RE: Really strange mask pressure reading
Interesting question is that I never saw anything like that over 7 years of air10 and vauto10 use, and surely I sneezed a few times over that long a period.

So does this count as an algorithm change in the 11 series? And/or some sort of new/different sensor(s)?
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