Possible causes:
  • A zero-flow calibration has not been performed or was done incorrectly.
  • High humidity or oil residue may cause thermal sensors to register false readings.
  • Nearby machinery or vibrations might create noise signals that are interpreted as flow.
Solutions:
  • Use the S4C-FS software to perform a proper zero-flow calibration with the pipe completely depressurized.
  • Check for moisture or oil using a dew point sensor or monitor.
  • Avoid installing the sensor near sources of vibration, such as compressors or motors, which could affect accuracy.