WiT WT901C - 6-Axis; 9-Axis Algorithm

WT901C RS232| manual v0707 | http://wiki.wit-motion.com/english
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2.4.10 6-axis/ 9-axis Algorithm
6-axis algorithm: Z-axis angle is mainly calculated based on angular velocity
integral. There will be calculated error on Z-axis angle.
9-axis algorithm: Z-axis angle is mainly calculated and analyzed based on the
magnetic field. Z-axis angle will have few drift.
The default algorithm of WT901C is 9-axis. If there is magnetic field
interference around installed environment, it is recommended to switch to
6-axis algorithm to detect the angle.
Method:
Step 1: Switch to the "6-axis" algorithm on “Config” menu
Step 2: Proceed the “Accelerometer calibration” and “Reset Z-axis angle”
calibration.
After the calibration is completed, it can be used normally.