1. The measurement value decreases due to the decrease of the current.
An electromagnetic flowmeter calculates the flow rate by measuring the current in a fluid, where the magnitude of the current is directly related to the measured value. Therefore, if the current is reduced, the measured value will also decrease accordingly. This condition is often caused by unstable mains voltage, aging or clogged wires, etc. To solve this problem, you can check the power supply voltage, replace the wires, or clean up the blockages, etc.
Second, the internal magnetic field of the electromagnetic flowmeter becomes weaker.
The magnetic field inside the electromagnetic flowmeter has a great influence on the magnitude of the current, and if the magnetic field becomes weaker, the current when the fluid passes through will also decrease correspondingly, resulting in a smaller measured value. The reason for the weakening of the magnetic field may be the aging of the magnet or the heating of the electromagnet, which usually requires the replacement of the magnet or timely repair and maintenance to solve this problem.
3. Fluid density or conductivity decreases Electromagnetic flowmeter calculates the flow rate according to the conductivity and density of the fluid, and if these factors change, the measured value will become correspondingly smaller. This is usually caused by changes in the temperature of the fluid, the addition of chemical agents, or changes in water content. When using an electromagnetic flowmeter, the conductivity and density of the fluid in different states need to be measured and verified to ensure the accuracy of the measurement. Electromagnetic flowmeter
Fourth, the electromagnetic flowmeter selection error.
The scope of application and accuracy of different electromagnetic flowmeters are different, and if the selection is not correct, it is easy to cause the problem of inaccurate measurement results. Therefore, when using electromagnetic flowmeters, the appropriate model and accuracy should be selected according to the needs to ensure the reliability and accuracy of the measurement results. Summary: The decrease in the measured value of the electromagnetic flowmeter may be caused by the decrease in the current, the weakening of the internal magnetic field, the decrease in fluid density or conductivity, and the wrong selection of the electromagnetic flowmeter. Dealing with these problems needs to be comprehensively considered and resolved in light of the actual situation.