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『Electromagnetic flowmeter for measuring incomplete pipes』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. If the straight pipe section of the electromagnetic flowmeter is insufficient, the flow rate may be too high or too low.
When the straight pipe section of the electromagnetic flowmeter is insufficient, the flow rate display may be too high or too low, depending on the actual fluid state. When the length of the straight pipe section is insufficient, there may be vortices or uneven flow velocity distribution before the fluid enters the flowmeter. If local high-speed flow is formed, the signal detected by the electromagnetic flowmeter will be enhanced, resulting in the displayed flow value being larger than the actual flow. For example, in some pipelines with bends and short straight sections, if the fluid enters the flowmeter without sufficient stability after turning, this phenomenon may occur. If the straight section is not sensitive enough, the fluid flow velocity distribution may be uneven, forming a low-speed zone near the electrode. The signal sensed by the electrode will weaken, resulting in a displayed flow rate value smaller than the actual flow rate. When the pump outlet is directly connected to an electromagnetic flowmeter and the straight pipe section is not sufficient, the unstable flow state generated by the pump may lead to this situation. 3. Flow fluctuations are caused by insufficient branch connections in the straight pipe section, resulting in unstable fluid flow and constantly changing flow velocity and direction. The signal detected by the electromagnetic flowmeter will also fluctuate accordingly, and the final displayed flow value will be unstable, making it difficult to accurately reflect the true flow rate.
2. After the electromagnetic flowmeter opens the air pipe alarm, there 
The return alarm from the air traffic control system should indicate that the pipe is not fully filled. Not fully filled but with flow, this occurs on horizontally placed pipelines. Installing the sensor on the riser should eliminate this problem. Another issue is whether the air traffic control alarm is faulty, tampered with, or improperly installed.
3. Kaifeng electromagnetic flowmeter empty tube alarm processing method
The processing method of Kaifeng electromagnetic flowmeter empty tube alarm mainly includes the following process: confirm whether the measured fluid is full in the measuring tube. The primary reason for the empty tube alarm is that the fluid in the measuring tube is not full, and it is necessary to check whether there is any leakage, gas accumulation or insufficient fluid flow in the pipeline.
. If the fluid is not fully filled, the process flow or pipeline design needs to be adjusted to ensure that the fluid continues to fill the measuring tube. Short circuit test: Connect the converter signal to terminals SIG1, SIG2, and SIGGDN with wires, and observe whether the "empty tube" prompt is cancelled. If the prompt is cancelled, it indicates that the converter is normal. Further check whether the conductivity of the measured fluid is too low (below the threshold), or whether the empty tube threshold and range parameters are set incorrectly. If the prompt has not been revoked, the converter may have a malfunction and the manufacturer needs to be contacted for repair. Check the connection of the signal line to confirm whether the signal line (SIG
1, SIG
2, SIGGDN) of the electromagnetic flo