Accelerator starting point calibration

[Barrett]

On a level plane, the az in tisensortag-ble-cc2650.js shows about .24 while the ax and ay show about 0.
If I use the divisor of 410 instead of 16384.0, it shows about 9.7, close to gravity (9.80665).
Should I set the divisor to show az of 9.80665? And also ax and ay?
Then, a change in the plane can reference gravity rather that the starting point of .24.

Why did you choose 16384.0 in the first place?

Thank you.