Status Bar Summary Zero the Probe Before you begin taking measurements you must first zero the probe. Was this article helpful? Yes No Related Articles Measuring With Cygnus Ultrasonic Tool PDF Download Troubleshooting Connecting with the TrackTreads Mobile Application Switching Bluetooth On to communicate with TrackTreads Mobile App. Gain Adjustment Turning On Vibration Mode Need Support?Can't find the answer you're looking for?Contact Support