Many thanks for the preference for BITalino. The calibration values change slightly for each chip... you can determine the values for your sensor by slowly rotating the accelerometer in a way that forces each accelerometer’s axis to rotate 360º.
From the resulting signals you can determine the maximum and minimum values, although you'll want to smooth the data first to prevent outlier peaks from biasing the calibration. You can see an example of the raw and filtered rotation time series for the Z axis in the figure presented in:http://bitalino.com/datasheets/REVOLUTION_ACC_Sensor_Datasheet.pdf
Hope you found this information useful. In case you have any further questions we can help with regarding this or any other topics, just let us know and we'll do our best to support.
The BITalino Team