Chengfeng Instrument's intelligent electromagnetic flowmeter is developed based on a standardized manufacturing system. Its advanced design concept ensures high precision and reliability of the product. Compared with old-fashioned electromagnetic flowmeters, it has the advantages of high measurement accuracy, strong reliability, good stability, complete functions, and long service life. In the process of using any instrument, it is possible to encounter situations where it can operate normally during initial debugging but problems may occur later on. Split type electromagnetic flow meters can also experience such problems. So, what are the reasons for measurement problems during flow meter operation?
1. The installation and usage conditions have changed. Generally, during installation and debugging, there are no interference sources around that can affect the entire debugging process. However, during operation, interference sources may cause fluctuations in the output signal. Therefore, these factors should be taken into account during the installation and debugging phase to avoid various problems during later use.
2. Thunder electric shock. From the perspective of numerous instrument usage sites, it is not only electromagnetic flow meters that may experience measurement errors in the event of lightning strikes, but other instruments and meters may also experience signal instability as a result. Therefore, we need to find out from which pathways lightning strikes affect flow meters in order to take better measures to avoid them. Research has found that lightning strikes can cause instantaneous high voltage and surge current in power lines, thereby causing damage to electromagnetic flow meters. The main damage caused to the split type flowmeter is through the flow signal line, power line, and excitation line between the sensor and the converter. Therefore, this situation needs to be taken into account when installing a split type flowmeter.
3. Adhesive layer on the inner wall of the flow sensor. When using an electromagnetic flowmeter for flow measurement, if the measuring medium contains suspended particles or other impurities, their adhesion on the inner wall of the sensor may affect the flow measurement results. If the conductivity of the adhesion layer is similar to that of the measured liquid, the adhesion layer only invisibly obstructs the flow measurement and will not have a significant impact on the normal output signal of the flowmeter; If the conductivity of the adhesion layer is high, it may cause a short circuit between the electrodes; If the adhesion layer has good insulation, it may cause the measurement circuit to disconnect.
Therefore, during the installation and commissioning phase of electromagnetic flow meters, it is necessary to consider potential issues that may arise during later use and take early preventive measures to avoid flow measurement problems in the future.