Solmetric iPV calibration error If the tilt readings displayed on the iPhone are incorrect, the calibration routine should be performed. The calibration routine is a 3 step process: Vertical (press the button to confirm) Horizontal – “face-up” (press the button to confirm) Horizontal – “face-down” (leave for 2 seconds to confirm) Please note that in the last step the phone is “face-down” and there is no need to press the button. After performing the calibration, the application should perform correctly. Otherwise, the app may need to be removed and reinstalled on the iPhone. If neither of the above solves the problem, please contact technical support at this address: [email protected]