Vortex flowmeter malfunction | What are the common malfunctions of vortex flowmeters? How to solve it?

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1. What should I do if the vortex flowmeter does not count and the signal has no output?

When the vortex flowmeter of Xuner Instrument shows the situation of "no data displayed, no signal output", the following steps can be taken to troubleshoot and handle it:

1. Check the instrument itself and check the settings: First, check the instruction manual to confirm whether the instrument settings are correct, to avoid no signal output caused by incorrect parameter settings.

. Tap test: Use a hard object to tap the vortex flowmeter and observe if there is any flow display. If there is a flow display, it may be due to the absence of medium flow in the pipeline, cracking and seepage, or the medium flow rate not reaching the lower limit of the vortex diameter. At this point, it is necessary to check the condition of the pipeline medium to ensure that the medium flows normally and the flow rate is within the measurement range of the instrument. If there is no traffic display: proceed to the next check. Sensor lead testing: Remove the sensor leads from the circuit compartment on the amplification board, then short-circuit the sensor lead terminals on the amplification board and touch them with your hand. If 50 or 100Hz is displayed, it indicates that there is a problem with the sensor and it may need to be replaced. If there is no display: it indicates that there is a problem with the amplification circuit, and the amplification circuit needs to be repaired or the relevant circuit components need to be replaced.

Secondly, investigate the on-site situation of the instrument and common ground problems. If the instrument itself has no problems, it is necessary to consider the situation where the instrument

and DCS system share the ground, causing the signal to not be transmitted.

. For example, at the water tank replenishment measurement site in a chemical plant, the customer has two DN125 flow meters on the feedback site, with a display on the meter head, but no current is flowing to the DCS system. The current measured from the GND end of the instrument is 0mA, and the current measured from the 24V end is 4mA. It is preliminarily judged to be a common ground problem. Solution: Replace with a separate 24V power supply for disturbance power supply: Provide an independent 24V power supply for the vortex flowmeter to avoid affecting signal transmission due to power issues. Adding isolation barriers to DCS systems: Isolation barriers have strong signal processing capabilities and can isolate electrical interference between instruments and DCS systems, providing greater selection space for the application of field instruments and control systems.

2. What are the common faults of vortex flowmeter? How to solve it?

3. What are the emergency handling methods for the display of over range in vortex flowmeters?

The core principle for emergency handling of over range display in vortex flowmeters is to quickly restore the normal operation of the process first, and then investigate the cause of the over range, which can be promoted in two directions: temporary emergency and long-term investigation. Temporary emergency handling steps 1 First time load reduction or medium cut-off: If the fluid flow rate instantly exceeds the upper limit of the range, immediately reduce the fluid flow rate and flow rate in the process pipeline, or close the upstream and downstream valves to cut off the medium, to avoid con

Vortex flowmeter malfunction | What are the common malfunctions of vortex flowmeters? How to solve it?

1. What should I do if the vortex flowmeter does not count and the signal has no output?

2. What are the common faults of vortex flowmeter? How to solve it?

3. What are the emergency handling methods for the display of over range in vortex flowmeters?

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