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Signal error in coriolis flow meter

Q: What are the possible causes that could contribute to signal error in coriolis flow meter? I experienced a case in which my flow meter showed that there was a 300 L/min flow in the flow meter while there actually was no flow in the meter.

A: First, check that the meter was not zeroed with a full line. Second, the meter may not have been installed properly (e.g. piping flanges were not aligned or spaced properly). Also, there could be an incorrect flow cal factor. If it is an older meter (from the 1980s) piping, harmonic distortion and excessive vibration could be the cause. Also bad coils or magnets are possible.