Flow meter does not count| gas flow indicator

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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. How to deal with inaccurate flow meters

1. Fluctuating measurement values 2. Inaccurate measurement values

3. There is a medium, but the instrument displays zero

4. The instrument has no display or no output. Common solutions are: 1. The reason for the fluctuation of measurement values may be a wiring problem (applicable to newly installed flow meters), usually due to poorly connected shielded wires; User process issues may cause dissatisfaction with the pipeline (possibly due to early installation not meeting installation conditions, which must be ensured to be full; during later use, the pipeline may not have an exhaust valve installed to hold air in the middle of the pipe). Check if the front valve of the flowmeter is fully open. If it is not fully

Flow meter does not count

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

2. How to deal with inaccurate flow meters

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