Lidar Lite V2 range adjustment

Hi, I have installed a lidar lite v2 on my quad and all seems to be working fine except when sitting on the bench i noticed that it is reading the distance incorrectly.

When sitting on the bench the lidar sensor is 150mm above the bench but is reading as 300mm.

Is there a way to correct this. If i lift the quad to 300mm off the bench im now getting a reading of 500mm.

Any help would be appreciated.