Ultrasonic flowmeter countermeasures against frequency converter interference

With the gradual improvement of industrial production automation technology and the gradual increase in the use of frequency converters, the electromagnetic interference caused by high-order harmonics of frequency converters is becoming more and more serious, especially in applications such as high-precision instruments and microelectronic control systems. The problem of electromagnetic interference is particularly prominent. If the ultrasonic flowmeter does not display the instantaneous flow rate, it is caused by the frequency converter electromagnetic wave interfering with the transmission signal strength of the flowmeter signal line. In order to reduce the influence of the frequency converter on the signal strength to a large extent, the following measures should be taken: 1. Reasonable layout . Make a reasonable layout during installation. The flow meter and data transmission line should be as far away from the frequency converter as possible; the control line should be as far away from the frequency converter as possible in space. cross. 2. Weaken the source of interference. When economic conditions permit, connect the filter to the inverter, but for some low-power inverters, the cost is high, and a low-cost electromagnetic interference suppression method can be used. 3. Shield the line. The flow meter and signal transmission line close to the inverter should be installed in a metal box or penetrated into a metal box for shielding. 4. Accurate grounding. The grounding wire of the frequency converter should be as thick as possible, and the grounding point should be as close as possible to the frequency converter; the grounding wire should be as far away as possible from the power line and signal line of the ultrasonic flowmeter; Connect the grounding wires of all equipment together before grounding; the grounding terminal of the frequency converter cannot be connected to the 'zero line' of the power supply of the ultrasonic flowmeter; although electromagnetic interference cannot be seen or touched, there are certain rules to follow The understanding of electromagnetic interference, as well as the understanding of the methods and means of combating electromagnetic interference, improve the ability to resist electromagnetic interference, and gradually eliminate the harm caused by electromagnetic interference.

The single most important quality you'll need as Beijing Sincerity Automatic Equipment Co., Ltd is 'stick-to-it-iveness' or grit, a combination of perseverance, patience and adaptability.

For more tips and strategies on effective coriolis mass flow meter emerson solutions, get your choice at Sincerity Mass Flow Meter Manufacturers.

But we do think that reckoning with supply chains of mass flow meter is a really important step. Even super simple switches in material, or sourcing, or shipping, or worker benefits seems like good place to start.