Datasheet

Calibrate:

The ADXL chips are calibrated at the factory to a level of precision sufficient for most

purposes. For critical applications where a higher degree of accuracy is required, you may

wish to re-calibrate the sensor yourself.

Calibration does not change the sensor outputs. But it tells you what the sensor output is for

a known stable reference force in both directions on each axis. Knowing that, you can

calculate the corrected output from a sensor reading.