How do I calibrate the incline on a NordicTrack treadmill?

To calibrate the incline on a NordicTrack treadmill, one would typically begin by inserting the safety key into the treadmill console and selecting the calibration option from the main menu or holding down specific buttons that initiate the calibration process, which often includes pressing the 'Stop' and 'Speed Increase' buttons simultaneously. Once initiated, the machine will enter into calibration mode and automatically adjust the incline from its lowest to highest level to calibrate its incline system. During this procedure, it's important for users to stand clear of the treadmill and avoid interrupting the process. Upon completion, the machine will stop moving, signaling the end of calibration. It is advised to refer to the user manual for specific instructions related to their treadmill model as button combinations and procedures may vary slightly between models.