Industry new

What aspects should be noted in the use of electromagnetic flowmeters?

When it comes to the application of electromagnetic flowmeters, it is necessary to clarify that the appearance of electromagnetic flowmeters is to deal with the measurement of liquid-solid two-phase fluids such as slurry and mud and some highly corrosive liquids such as nitric acid and sulfuric acid. Since the beginning of 1930, experts and scholars from all over the world have conducted various experiments to find a measurement method, but they have not succeeded. But it is because of their continuous efforts that magnetic flux detection can gradually become practical. Until 1945, electromagnetic flowmeters appeared in everyone's field of vision and became a measuring instrument with commercial value. With the continuous development of science, the skills of electromagnetic flowmeters are constantly updated. In 1982, China developed the first generation of rectangular wave excitation electromagnetic flowmeters. Since then, we have begun to use a wide range of applications for electromagnetic flowmeters. Electromagnetic flowmeters have also become more advanced over time, with more varieties.

Today's electromagnetic flowmeters are used in chemical, steel, coal, oil mining, papermaking, pharmaceutical, food and other areas related to human rest, and can accurately measure the volume and flow of various conductive fluids and liquid-solid two-phase fluids. In so many applications, electromagnetic flowmeters have the absolute advantage of no pressure loss, high accuracy and good stability in the use of chilled water. In the use of electromagnetic flowmeters in chilled water, it should be noted that in the case where the measured substances have certain corrosive properties, the use of PTFE memory data will result in the electromagnetic flowmeter not being able to withstand negative pressure. Skeleton-type memory to ensure the security of the test.

In the application process, the electromagnetic flowmeter should pay special attention to the thunderstorm climate. The electromagnetic flowmeter will be easily damaged by lightning strikes. Therefore, it is necessary to pay attention to the application method during the thunderstorm season in spring. Only in an outstanding environment without interference, the electromagnetic flowmeter can measure accurately enough. Therefore, in order to ensure a safe environment during thunderstorms, the grounding maintenance of the sensor should be done during installation to ensure accurate measurement of the electromagnetic flowmeter. degree. The grounding wire for manufacturing the arrester should not exceed 1 m. Multi-strand copper insulated wires should be used and the grounding net should be installed. The signal cable between the converter and the sensor should be covered with a galvanized pipe, the length is within 50 meters, and the power supply should be a single current of 220v. An air switch should be placed in the outer case to make the lightning arrester and The air switches are connected in parallel, so that the electromagnetic flowmeter can be safely used and accurately measured in a thunderstorm climate.

PREVIOUS：How to correctly check the electromagnetic flNEXT：How to properly maintain the electromagnetic