Environmental Interference Factors of Electromagnetic Flow Meters

Abstract: The information on environmental interference factors of electromagnetic flowmeters is provided by excellent flowmeter and flowmeter manufacturers. Environmental interference factors of electromagnetic flowmeter Generally, the flowmeter will be more or less disturbed by the outside world during measurement, which will affect the measurement results. This article describes what external disturbances are encountered during the measurement of electromagnetic flowmeters. List it out to please everyone. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on environmental interference factors of electromagnetic flowmeters. Environmental interference factors of electromagnetic flowmeters Generally, the flowmeter will be more or less disturbed by the outside world during measurement, which will affect the measurement results. This article describes what external disturbances are encountered during the measurement of electromagnetic flowmeters. List it out so that everyone can understand the existence of these factors, and I hope it will help everyone. The electromagnetic flowmeter is susceptible to external interference due to its small flow signal. The main sources of interference are pipeline stray current, static electricity, electromagnetic waves and magnetic fields. ●Pipeline stray current: mainly rely on electromagnetic flowmeter for good grounding protection, usually the grounding resistance should be less than 100Q, do not share grounding with other motors and electrical appliances. Sometimes the environmental conditions are better, and the electromagnetic flowmeter can work normally without grounding, but we think that it is better to be grounded even so. Because once the good environmental conditions no longer exist and the instrument fails, it will affect the use at that time, and various inspections will bring a lot of trouble. Sometimes the electromagnetic flowmeter is well grounded, because the stray current of the pipeline is too strong (such as the electrolysis process pipeline and the cathodic protection pipe network), which affects the normal measurement of the electromagnetic flow. At this time, the electromagnetic flow sensor must be electrically insulated from the pipeline. isolation. ●Electrostatic and electromagnetic wave interference: Static and electromagnetic waves will be introduced through the signal line between the electromagnetic flowmeter sensor and the converter. Usually, it can be prevented if it is well shielded (such as shielded cable for signal line, and the cable is placed in a protective iron tube). However, there have also been instances where the prevention of strong electromagnetic waves is ineffective. At this time, the converter is moved closer to the sensor, the connected signal cable is shortened, or an integrated instrument without an external cable is used. ●Magnetic field interference: Usually, the electromagnetic flow sensor is only taken away from the strong magnetic field source. The ability of the electromagnetic flowmeter to resist magnetic fields varies depending on the structural design of the sensor. For example, the sensor excitation coil protective shell is made of non-magnetic materials (such as aluminum, plastic), and the ability to resist the influence of magnetic fields is weaker, while steel is stronger. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Environmental Interference Factors of Electromagnetic Flow Meters'

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