2.3.4 Reset Z-Axis Angle; Reset Height To 0 - WiT WT901B User Manual

2.3.4 Reset Z-axis Angle

Note：If you want to avoid magnetic interference, you can change the algorithm
to Axis 6,then you can use reset function of " Reset Z-axis angle".
The z-axis angle is an absolute angle, and it takes the northeast sky as the
coordinate system can not be relative to 0 degree.
Z axis to 0 is to make the initial angle of the z axis angle is relative 0 degree.
When the module is used before and z - axis drift is large, the z - axis can be
calibrated, When the module is powered on, the Z axis will automatically return
to 0.
Calibration methods as follow: firstly keep the module static, click the "Config"
open the configuration bar and then click "Reset Z-axis Angle" option, you will
see the the angle of the Z axis backs to 0 degree in the module data bar.

2.3.5 Reset Height to 0

The zero setting is to reset the height of the module output to zero. The altitude
output of the module is calculated according to the air pressure. The operation
of returning to altitude is to calculate the current air pressure value as the zero
altitude position. The operation method is to click the "Reset Height" option in
the configuration bar.
Only available for the module built-in barometer like WT901B, HWT901B,
WTGAHRS1, WTGAHRS2
WT901B | manual v0707 | http://wiki.wit-motion.com/english
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