Put the laser in ready mode by pressing "ready." Then using a straight handpiece attached to the fiber (waveguide), insert the end of the handpiece into the calibration port on the side of the laser unit, then press and hold the foot switch down. You will hear a series of clicks. Once the check mark appears on the screen, the calibration is finished. To learn more or get a walk-through over the phone, you can call LuxarCare support at (866) 589-2722.