Disconnection of the shielding wire in the electromagnetic flowmeter will affect the measurement accuracy and stability, and needs to be replaced or repaired in time.
1. Working principle of electromagnetic flowmeter
Electromagnetic flowmeter is a classic flow measurement instrument and is widely used in the field of industrial automation. It is an instrument that uses Faraday's electromagnetic induction principle to measure flow by inducing electromagnetic potential when a conductor (usually water or liquid) passes through a conductive pipe.
Electromagnetic flowmeter consists of two parts, namely pipe and sensor. The medium flowing in the pipeline is an electrical conductor. When the electrical conductor flows through the pipeline, the electromagnetic induction coil inside the sensor will bring a magnetic field. When the conductor flow is small, the conductivity is low and the magnetic field is weak; when the conductor flow is large, the conductivity is high and the magnetic field is strong. . According to Faraday's principle of electromagnetic induction, when an electric current moves in a magnetic field, it will generate electromagnetic induction around it.
Famet Electromagnetic Flowmeter2. The role of shielded wire in electromagnetic flowmeter
The shielded wire in electromagnetic flowmeter is a wire specially used to shield external electromagnetic signals. Its main function is to protect the sensor coil inside the electromagnetic flowmeter and avoid errors caused by external interference. The shielded wire can effectively isolate external interference, make the signal measured by the sensor more accurate, and ensure that the flow meter can work stably.
3. What impact will the disconnection of the shielding wire have on the electromagnetic flowmeter?
When the shielding wire inside the electromagnetic flowmeter is disconnected, the accuracy and stability of its measurement will be affected, which may lead to inaccurate readings or the inability to measure flow. This is because when the shielding wire is disconnected, external electromagnetic signals will interfere with the sensor signal, causing errors.
In addition, the shielded wire can also protect the sensor from static electricity and electromagnetic radiation. Once the shielded wire is disconnected, the sensor may be damaged, thus affecting the service life of the electromagnetic flowmeter.
4. How to solve the problem of shielded wire disconnection?
When it is found that the shielding wire of the electromagnetic flowmeter is disconnected, we should promptly investigate the cause and replace or repair the broken wire. For electromagnetic flowmeters whose shielding wires are seriously disconnected, we can consider replacing the shielding wire with a new one, or welding the disconnected shielding wire back. These methods can effectively solve the problem of shielding wire disconnection and ensure the normal operation of the electromagnetic flowmeter.
V. Conclusion
The electromagnetic flowmeter is a high-precision flow measurement instrument. During use, attention needs to be paid to the protection and maintenance of its shielding wire. When the electromagnetic flowmeter's shielding wire is disconnected, its measurement accuracy and stability will be affected, and it may even cause it to fail to work properly. Therefore, we should find the cause of the fault in time and replace or repair the shielded wire as needed to ensure the normal operation of the electromagnetic flowmeter.
Hangzhou Economic Development Area，Hangzhou 310018，China
