7 points to pay attention to when installing a radar level gauge (1) When measuring liquid materials, the axis of the sensor and the surface of the medium should be kept vertical; when measuring solid materials, because the solid medium will have a pile angle, the sensor should be tilted to a certain angle . (2) Try to prevent devices that form false reflections within the emission angle. In particular, it is necessary to avoid obstructing devices in the 1/3 cone-shaped emission area closest to the antenna (because the closer the obstructing devices are, the stronger the false reflection signal is). If it cannot be avoided, it is recommended to use a refraction plate to refract the too strong false reflection signal away. This can reduce the energy density of false echoes, making it easier for the sensor to filter out false signals. (3) Avoid the feeding port to prevent false reflections. (4) The sensor should not be installed in the middle of the arched tank (otherwise the false echo received by the sensor will be enhanced), and it should not be installed very close to the tank wall. The best installation position is 1/2 of the container radius. (5) Avoid placing the equipment in places with strong eddy currents. For example: due to mixing or strong chemical reaction, etc., it is recommended to use waveguide or bypass tube for measurement. (6) If the sensor device is on the receiver, the antenna must protrude from the receiver. The horn antenna extends to receive at least 10mm. Rod antenna receiving length up to 100 or 250mm. The minimum receiving diameter is 250mm. The method of increasing the receiving diameter can be adopted to reduce the interference echo generated by the receiving. (7) Regarding the waveguide antenna: the inner wall of the waveguide must be lubricated, and the bottom opening of the waveguide must reach the required minimum liquid level, so that it can be measured in the pipeline. The type plate of the sensor should be aligned with the axis of the waveguide opening. If the measured dielectric constant is less than 4, it is necessary to install a reflector at the end of the waveguide, or bend the end of the waveguide into a curvature to refract the reflected echo at the bottom of the container.
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