Kauai Labs navX-MXP User Manual page 73

Guidance
Gyro/Accelerometer Calibration
Factory Calibration
Before navX-MXP units are shipped, the accelerometers and gyroscopes are initially calibrated
at the factory; this calibration data is stored in flash memory and applied automatically to the
accelerometer and gyroscope data each time the navX-MXP circuit board is powered on.
Note that the onboard gyroscopes are sensitive to temperature changes. Therefore, since the
average ambient temperature at the factory (on the island of Kauai in Hawaii) may be different
than in your environment, you can optionally choose to re-calibrate the gyroscope by pressing
and holding the "CAL" button for at least 10 seconds. When you release the "CAL" button,
ensure that the "CAL" Led flashes briefly, and then press the "RESET" button to restart navX-
MXP. When navX-MXP is re-started, it will perform the Initial Gyro Calibration – the same
process that occurs at our factory. NOTE: It is very important to hold navX-MXP still, and
parallel to the earth's surface, during this Initial Gyro Calibration period. You might consider
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