Author: Huang Guangming Unit: Changsha Engineering of China Light Industry***
Abstract:Electromagnetic flowmeter is an instrument widely used in industrial fluid measurement, which has the advantages of accurate measurement and good stability. However, in the actual use process, various failures may occur in the electromagnetic flowmeter, which affects the accuracy and stability of the measurement results. The purpose of this article is to provide reference for engineers and technicians in related fields for the common faults of electromagnetic flowmeters and their treatment methods and disposal measures.
Keywords: electromagnetic flowmeter; troubleshooting; Disposal measures.
I. Introduction. Electromagnetic flowmeter is an instrument for flow measurement based on Faraday's law of electromagnetic induction, which is widely used in chemical, metallurgical, environmental protection and other industrial fields. In the actual use process, due to the influence of various factors such as fluid characteristics, environmental conditions, installation and maintenance, various faults may occur in the electromagnetic flowmeter. Therefore, it is of great significance to master the fault handling methods and disposal measures of electromagnetic flowmeters to ensure the smooth progress of industrial production.
2. Analysis of common faults and causes of electromagnetic flowmeter.
Zero drift: The zero drift of the electromagnetic flowmeter refers to the phenomenon that the output signal of the meter is not zero when no fluid passes through. Zero drift can be caused by aging of the internal coil of the sensor, temperature changes, improper installation position, etc.
Measurement error: Measurement error may occur during the measurement process of electromagnetic flowmeter, such as high or low indication value. Measurement errors can be caused by dirt deposits inside the sensor, changes in fluid conductivity, magnetic field disturbances, etc.
Signal fluctuations: The output signal of the electromagnetic flowmeter may fluctuate, affecting the stability of the measurement results. Signal fluctuations can be caused by bubbles or impurities in the fluid, power fluctuations, poor grounding, etc.
3. Electromagnetic flowmeter fault handling method.
Zero drift treatment: For zero drift faults, the following treatment methods can be taken: check whether the sensor coil is aged or damaged, and replace it if necessary; Adjust the mounting position to ensure that the sensor is in full contact with the fluid and is not subject to external interference; The sensor is temperature compensated to reduce the effect of temperature changes on the zero point.
Measurement error handling: The following measures can be taken for the failure of measurement error: regularly clean the inside of the sensor to prevent dirt deposition from affecting the measurement accuracy; Check if there is a change in the conductivity of the fluid and calibrate if necessary; Eliminate the source of magnetic field interference and ensure the stability of the sensor's operating environment.
Signal fluctuation processing: For signal fluctuation faults, the following measures can be taken: check for the presence of bubbles or impurities in the fluid, and filter or vent if necessary; Check whether the power supply is stable, and take voltage stabilization measures if necessary; Check whether the grounding is good to ensure the stability of signal transmission.
Fourth, electromagnetic flowmeter fault disposal measures.
Establish a sound maintenance system: regularly clean, calibrate and inspect the electromagnetic flowmeter to ensure that the instrument is in good working condition. At the same time, the maintenance process is recorded in detail to facilitate subsequent fault analysis and treatment.
Improve the skill level of operators: Strengthen the training and education of operators to improve their skill level and troubleshooting ability. Ensure that operators can quickly judge and take correct measures when encountering faults.
Equipped with necessary fault diagnosis tools: Equip operators with necessary fault diagnosis tools, such as multimeters, oscilloscopes, etc. These tools help operators quickly locate the cause of the failure and take appropriate action.
Establish an emergency response plan: Formulate an emergency response plan for possible serious failures or emergencies. The plan should include fault reporting, on-site disposal, cause analysis, preventive measures, etc., to ensure that it can respond quickly and effectively in case of emergency.
V. Conclusions. Electromagnetic flowmeters play an important role in industrial fluid measurement, and their accuracy and stability are of great significance to ensure the smooth progress of industrial production. This article describes the common faults of electromagnetic flowmeters and their treatment methods and disposal measures, and provides a reference for engineers and technicians in related fields. However, with the continuous development and advancement of industrial technology, the performance and function of electromagnetic flowmeters are also constantly improving and improving. Therefore, in the future, it is necessary to continue to study the fault handling methods and disposal measures of electromagnetic flowmeters in depth to adapt to the continuous changes and development needs of industrial production.