How can I know the direction of X/Y/Z axis of ACC data as represented on a device?

The actual direction of the three-axis accelerometer varies for different devices. You can use the data tagging feature of INTELINK to determine the direction of the three axises. If your devices do not support INTELINK, contact us for more information.

1. Go to Data tagging page using INTELINK.
   For detailed procedure, see Data tagging. After it is done, you can see three of the signal lines with the blue one representing X axis value, green one representing Y axis value and red one representing Z axis value, as shown below.
   
2. Place device in different directions and observe X/Y/Z value.
   When the value of an axis is close to +1000 or -1000, the direction of the axis is parallel to the gravity. And a positive value means a direction opposite to the gravity while a negative value means a direction the same as the gravity.

Example:

• Place NANO on a stable place as below.
  
  Value Z is close to -1000
  
• Place NANO on a stable place as below.
  
  Value Y is close to 1000
  
• Place NANO on a stable place as below.
  
  Value X is close to 1000
  

So we can get that the direction of the three axes in the device is illustrated as below: