Radar and the antenna is mainly composed of electronic components and antennas, no moving parts, the use of faultless minimal. Occasionally encountered in the use of the problem is that some volatile organic storage tank will be in the radar level meter bell or antenna crystallization, as long as they are scheduled to check and clean up, less maintenance.
Radar level meter is the use of radar technology to measure the level of the instrument. The instrument emits and receives a specific frequency of radar waves reflected after the encounter object according to the time of the radar wave to calculate the instrument to the space between the material within the instrument has a predetermined set of the entire height of the silo, the instrument calculates the actual material Height, and display and output the corresponding signal.
At the time of its installation should pay attention to the matter whether the radar level gauge can accurately measure, relying on the reflected wave signal. If at the location of the chosen installation, the liquid level can not reflect the electromagnetic wave back to the radar antenna or there is an interfering object in the signal wave range that reflects the interference wave to the radar level gauge, the radar level gauge can not accurately reflect the actual level. The installation should pay attention to the following points:
1, tank mixing valve, tank wall adhesion and pathways and other objects, if the radar level gauge signal range, there will be interference reflected waves, affecting the level measurement. In the installation to choose a suitable installation location, in order to avoid interference of these factors.
2, radar level meter antenna axis should be vertical with the liquid level reflection surface.
3, the liquid level fluctuations in the larger container level measurement, can be used with bypass pipe level gauge to reduce the impact of liquid level fluctuations.
4, horn-type radar level gauge bell mouth to be more than the mounting hole of the inner surface of a certain interval (> 10mm). The rod antenna should protrude from the mounting hole, the length of the mounting hole can not exceed 100mm. For round or oval containers, they shall be mounted at a distance of ½R (R is the radius of the container) from the center, not at the center of the top of a round or oval container, After multiple reflections, the pool at the top of the container at the center, forming a strong interference wave, will affect the correct measurement.
In routine maintenance, you can use the PC (equipped with MAT software) remote observation of the reflected wave curve, the new interference may be generated later, you can use the level meter has the function of identifying false waves, remove the interference of reflected waves , To ensure the correct measurement.
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