To calibrate your 18000T/2000T treadmill first remove the safety cylinder. The display should show four dashes on the display below the display with ‘TRUE’ scrolling. Press and hold the up and down buttons (Incline and Decline buttons) while inserting the safety cylinder. The display will show ‘CALIBRATION PRESS START’. Press the start button. The treadmill will begin to auto calibrate and the display will now show, ‘AUTO SPD/ELE CALIBRATION’. Wait until the treadmill stops moving before using. Once the calibration is complete the display will show ‘CALIBRATION SUCCESSFUL’. If there is a problem or an error message occurs, please contact Mobility Research’s technical support office.