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Working principle and correct operating methods of radar level gauges

2021-04-07View Original

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A radar level gauge transmits and receives short microwaves with very low power through an antenna system. And the radar waves within it travel at the speed of light. A special time-extension method ensures stable and accurate measurements in a relatively short period of time; the operating time can be converted into a level signal by electronic components. Even in the presence of false reflections, newer microprocessor technologies and software can accurately analyze level echoes. By entering the container dimensions, the empty-space distance value can be converted into a signal proportional to the fill level. The instrument can be debugged with an empty chamber. In solid measurements, high-frequency sensors in the K-band can be used. Due to the excellent focusing effect of the radar level gauge signal, installations inside the silo or adherences on the silo walls do not affect the measurement.   Radar level gauges can be used at normal industrial frequencies; the energy of the beam used for detection is relatively low, and they can also be installed inside various metals and pipes for detection purposes. It can perform continuous, contactless detection of certain liquids and particulates, using highly advanced detection technology.   Below are the correct procedures for operating a radar level gauge: 1. Fix the flange in place or tighten the screws; if necessary, replace it with a more secure sealing ring.   2. Before proceeding with the opening of the storage tank, it is essential to confirm that there is no pressure inside the tank and no harmful substances present.   3. It should be explicitly acknowledged that positioning calibration can be carried out when there are empty cans inside the vessel or when the material level just covers the bottom of the vessel; positioning calibration can also be performed when the material level is low ; The echo signals of radar level gauges can be optimized through false echo storage.   4. Rotate the flange mark by one hole position, or rotate the screw thread by 1/8 of a turn. Pay attention to the amplitude of the backwave. Then continue rotating the flange or screw thread until a full rotation is completed; position it at the location indicated by the echo signal.   I hope the above content helps everyone gain a better understanding of this instrument.

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