ADXL345 Sensitivity with time

[aftab_s81]

Hello,

I am new to accelero-meters.

I have several ADXL345 boards with me. I am reading XYZ data over I2C. However, different boards have different level of sensitivity to the jerk/change in their orientation.

The most used one (oldest) has least sensitivity while the brand new is very sensitive. I am using the same code for testing all of the ADXL345 boards.

By sensitivity I mean change in XYZ value w.r.t change in orientation and/or movement.

Any body has any idea what is happening?

 

[visioneer]

You need calibration of your Si MEMS accelerometers.

Can you remember your iPhone needs 360 degree turn around occasionally?

You must implement application specific calibration method for your own requirement?