Knowledge on the installation and fault detection of intelligent electromagnetic flowmeters

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　　The intelligent electromagnetic flowmeters commonly used today are those that measure flow rate based on Faraday’s law of electromagnetic induction. The advantages of electromagnetic flowmeters include extremely low pressure loss, a wide range of measurable flow rates, and easy installation and use. Below, the technical editor from the manufacturer will provide users with a brief analysis of the installation requirements and key points for fault detection of intelligent electromagnetic flowmeters. 　　1. Due to its narrow measurement range, the intelligent electromagnetic flowmeter experiences pressure variations caused by uneven stress resulting from different installation positions. (A pressure of around 0.2 KPa is generated at a slope of 30 degrees.) In such cases, especially when using it in conjunction with Aniuwa flow meters, it is essential to pay attention to the installation of intelligent electromagnetic flow meters. 　　2. Prevent the transmitter from coming into contact with corrosive or overheated media being measured. 　　3. Prevent residue from accumulating in the pressure guide tube. 　　4. The pressure guide tube should be as short as possible. 　　5. The hydrostatic head of the liquid columns in the pressure guiding pipes on both sides should be kept balanced. 　　6. The pressure guide tube should be installed in a location with a low temperature gradient and minimal temperature fluctuations, free from shocks and vibrations. 　　Fault detection methods for intelligent electromagnetic flowmeters: When detecting faults in intelligent electromagnetic flowmeters, it is necessary to understand their working principle, as this enables us to identify the causes more easily and quickly. 　　Working principle of intelligent electromagnetic flowmeters: The differential pressure from the pressure tubes on both sides acts directly on the isolation diaphragms on either side of the transmitter’s sensor. This pressure is transmitted to the measuring element through the sealing fluid inside the diaphragms. The measuring element converts the detected differential pressure signal into a corresponding electrical signal, which is then sent to the converter. After processing such as amplification, this signal is output as a standard electrical signal. 　　Several common and practical measurement methods for intelligent electromagnetic flowmeters: 1. In combination with a throttling element, the flow rate of the liquid is measured by utilizing the pressure difference generated before and after the throttling element. 　　2. Utilize the pressure difference generated by the liquid’s own gravity to measure the height of the liquid. 　　3. Directly measure the pressure difference of liquids in different pipes and tanks. 　　During the measurement process, transmitters often experience various faults, and timely identification, analysis, and handling of these faults are crucial for ongoing production. Based on our experience in daily maintenance, we have summarized some determination and analysis methods as well as analysis procedures. 　　(1) Investigation method: Reviewing sparking, smoking, unusual odors, power supply changes, lightning strikes, humidity, misoperations, and improper maintenance prior to the failure. 　　(2) Visual inspection method: Observe external damage to the circuit, leaks in the pressure guiding tubes, overheating of the circuit, and the status of the power supply switch. 　　(3) Detection method: Open circuit detection – Separate the part suspected to be faulty from the other parts to see if the fault disappears. If it does, the location of the fault is determined; otherwise, further investigation can be carried out. For example, if an intelligent differential pressure transmitter cannot communicate via Hart over a distance, the power supply can be disconnected from the instrument itself, and an external power source can be used to power the transmitter in order to check whether an electromagnetic signal of around 2 kHz is present in the cable and interfering with the communication. 　　After-sales service: For the first time of use, our technical engineers can go to the site to guide installation and debugging. Under normal use and within the warranty period, parts are replaced and repairs are carried out free of charge; upon receiving a call regarding a fault from the customer, if the issue cannot be resolved over the phone, technical personnel will be sent to the site within 48 hours (except in cases of force majeure). 　　We promise to provide technical consultation on products; assist customers in making product selections; offer pre-sales, in-sales, and after-sales services; provide training on how to use the products; and deliver all services within our capabilities.