How to troubleshoot a clamp-on ultrasonic flowmeter that is functioning normally but not measuring flow?

Potential causes and solutions are as follows:

• Changed measured medium: Adjust the measurement mode.
• Medium vaporization due to excessive temperature: Cool down the medium.
• Medium temperature exceeding the sensor’s temperature limit: Cool down the medium.
• Aged or depleted coupling agent under the sensor: Reapply coupling agent.
• High-frequency interference exceeding the meter’s self-filtering capacity: Move away from the interference source.
• Lost data in the controller: Re-enter all correct parameters.
• Controller crash: Restart the controller.