After checking out above issues, please process trouble shooting according to following description.

 

Problem Possible Cause Solution
Velocity measurement is erractic or fluctuating Very erractic or non-uniform flwo Follow installation requirements shown in Comate thermal mass flow meter manual
Flow meter installed with less than required minimum pip diameters upstream and dlown stream of the sensor Follow installation requirements shown in Chapter 2
Insertiong sensor probe not mounted securely Sensor probe must be mounted securely without vibration
Earthing circuit loop Wire the meter according to the introduction in Comate thermal mass flow meter manual
Liquid contains in fluid Install a water filter in upstream of the meter
Sensor failure Return to factory for evaluation
Transmitter failure Return to factory for evaluation
The measuring flow is too high or too low Sensor is not inserted to the middle of the pipe line Please fix the sensor in the middle of the pipeline
The flowmeter is not vertical to the center line of the pipe line Re-install the meter and make the probe vertical to the center line of the pipe line
No flow measured The limit of small signal cut off is set too high Set the small signal cut off limit to a lower and proper value
The flow rate in pipeline is smaller than the lower limit of the meter Contact the supplier
The flow rate in pipeline is larger than the higher limit of the meter Contact the supplier
Flow profile distortion Try to find another location for the meter
Sensor failure Return to factory for evaluation
Transmitter failure Return to factory for evaluation
Extremely turbulent flow Do not place the meter near a ventilator static mixer or valve