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z-accelerometer offset?
Have you checked against x- and y-direction if “g” is at the same level then? There could be multiple ways that the values are off: shifted, scaled, individual axes…

You could have a look into our, select then the line of your 6s, and click through the “(i)nfo circles” below the table. A value of 9.9 does not seem to be that unlikely as a result:
[edit: moved inline picture into an attachment] 

There are also graphs for standard deviations…

Acceleration without g is essentially a blackbox provided by the smartphone OS. Gyroscope and magnetometer are likely to be taken into account – in iDevices at least. I have no idea if an error in these sensors could account for such a systematic.

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Messages In This Thread
z-accelerometer offset? - by jeglin - 08-28-2020, 05:56 AM
RE: z-accelerometer offset? - by Jens Noriʇzsɔɥ - 08-28-2020, 09:31 PM
RE: z-accelerometer offset? - by jeglin - 08-28-2020, 09:57 PM
RE: z-accelerometer offset? - by jeglin - 08-28-2020, 10:17 PM

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