Measurement of Accleration or Inclination Angles
The sensor is located at the red rectangle position. Press keypad "9" to measure the variation of 3D acceleration in g (moving) and angles in degree (stationary) within 10s.

Remarks:
When the mobile logger is accelerating or decelerating, it will record the acceleration a_x, a_y and a_z along its three (X, Y and Z) axes in unit of g (acceleration due to gravity). When it is non-accelerating or stationary, it will record the inclination angles between the Earth's normal and its three axes. The X and Y axes are shown in the above diagram while the Z axis is pointing vertically upwards from the surface of the logger.