The tribometer is programmed to start collecting data from the load cell, inclinometer, and IR thermometer after the load cell experiences a non-zero force for three seconds.

This means that the user can 'trick' the tribometer into taking readings even when the motor is not running by applying a force on it and removing it after three seconds. (Important fact for load cell calibration)

Likewise, the user can 'trick' the tribometer into not taking any readings even when the motor is running by simply not applying a force on the load cell. (Important fact for grinding/polishing of disk)

If a non-zero force is detected by the load cell, the indicator beside the load cell will be lighted up.