Electromagnetic flowmeter is one of the most widely used medium measuring instruments in industrial production at present. Through electromagnetic flowmeter, we can measure the quality, flow rate and other data of medium to analyze whether the production process is normal. In the industrial environment, electromagnetic flowmeter is generally used in some corrosive media measurement, so it needs to be regularly maintained in the process of use, to ensure its normal work.
The zero point of the electromagnetic flowmeter must be adjusted when the electromagnetic flow sensor is filled with liquid. After put into operation, it is also necessary to check the zero point of the operation condition for timing stop flow. Especially for accumulated, easily contaminated electrode, rich in solid non-clean liquid, in the early period of operation should be more check, to determine the normal view period. The electromagnetic flowmeter of communicating excitation method and rectangular wave excitation ratio are more prone to zero drift, so it is more important to pay attention to check and adjust.
After the electromagnetic flowmeter stops, it is necessary to measure the resistance between the electrodes first, and then disconnect the signal connection between the sensor and the converter, so as to measure whether the instrument is in the range specified by the manufacturer after it is filled with liquid. The resistance value of each measurement needs to be recorded and saved, which can be used as the basis for judging the faults of electromagnetic flowmeter sensors in the future.