Symptom Reason Trouble shooting Repair
No display Power supply failure Test the voltage on the power source with a universal meter Re-wire the power or use a new power
Power is not wired Test the voltage on the power source with a universal meter Wire the power
Cable if broken Check if there is break off point on the cable Check the cable and re-wire
Wrong wiring Check if wiring to the correct termimal Re-wire
Displayed flow rate is 0 while there are flow in the pipe Flow rate is lower than the meter’s lower limit Increas the flow rate to check Increase the flow rate or replace a new proper flowmeter
The flow rate of small signal cut off function is too high Check the small signal cut off setting Set the small signal cut off to a proper value
Energy threshold value is too high Check if the Energy threshold value is too high in spectrum analyzing checking mode Set the Energy threshold value to a proper value (Please reference to Note 1 for how to set)
Transmitter function failure Replace the transmitter with another transmiter of same type to check Replace the transmitter
Sensor is damaged Increase the flow rate to check first, than intall the transmitter to another flowmeter in same type to check. Replace the sensor
Pipeline blocked or sensor jamed. If all above possibilties are eliminated, please check the pipe line and installation. Re-install the flowmeter
The flowmeter has flow reading while there is no flow in the pipe Power frequency interference Check the frequency display on meter is stable at the value that same as the power frequency Re-wire the meter with sheilded cable according to requirement.
There is high voltage instrument or high frequency interference close to the flowmeter Check if there is high voltage instrument or high frequency interference close to the flowmeter Re-locate the flowmeter
There is heavy vibration on the pipe line Sense the vibration on the pipe line by touch it with hand Tighten the pipeline where the flowmeter is installed
Valve is not closed properly that there flow leak into the pipe Check pressure and check if valve is closed and sealed Repare the valve
The flow rate reading fluctuate significantly The gasket and the pipe are not concentric Check the position of the gasket Re-install the gasket
The flowmeter pipe body and the pipe line are not concentric Check if the flowmeter pipe body and the pipe line are not concentric Re-install the meter
Straight pipe length not enough or the inner diameter of flowmeter pipe body do not match the pipeline Check the straight pipe length and the diameter of the pipelien Re-locate the flowmeter
There is heavy vibration on the pipe line Sense the vibration on the pipe line by touch it with hand Tighten the pipeline where the flowmeter is installed
The fluid has not fill the pipeline fully Check the fluid status and the location of the meter. Re-locate the flowmeter
Two phase flow Check if there is 2-phase flow according to the pressure and temperature of the fluid. If the fluild is liquid-solid two phase flow, need to install a filter at upstream of the flow meter. If the fluild is liquid-gas two phase flow, need to install a getter at upstream of the flow meter.
Transmitter failure Replace the transmitter with another transmiter of same type to check Replace the transmitter
There is big difference between the flow reading and the process flow rate No density compensation for steam measurement Check the density compensation devices and the setting Fix density compensation
The estimated flow rate before using the meter is wrong Use other flowmeter to confirm the actual flow rate
Setting incorrect Check the settings of meter K factor,upper and lower limit of flow rate Set the meter correctly