Radar level gauges have been widely used in various industrial occasions due to their unique advantages and characteristics. However, because each industry has different measurement requirements, its application covers simple storage containers with different capacities until it has multiple levels. Therefore, when selecting a radar level meter, there are many places that need to be selected correctly. If it is not in place, its measurement effect will be greatly reduced, and even the dashboard will not work at all. This article will introduce the precautions of radar level meter selection.
1. Measure the temperature of the medium;
The measurement temperature range of ordinary radar level gauges is -40 ~ 130 degrees. When the medium is in this temperature range, the radar level gauge can work normally. When the temperature is lower than -40 degrees, the LCD screen will not work properly; when the temperature is higher than 130 degrees, it is necessary to replace the high temperature type. The high temperature resistance range is -40 ~ 250 degrees; when the temperature is higher than 250 degrees, the nitrogen purge function needs to be added.
2. Measure the pressure of the medium
The measuring pressure range of the ordinary radar level gauge is -1 ~ 4MPa, beyond which the range needs to be customized, and the maximum can reach 10MPa.
3. Measure the physical characteristics of the medium
It is necessary to determine the physical characteristics of the measurement medium, including the corrosivity of the medium, whether it will cause it, whether it will crystallize, and so on. Selection is needed to select different models based on specific physical characteristics.
4. Process connection specifications
Requires specific process connection specifications on the coaxial tank. If it is a threaded connection, the radar level gauge needs to be equipped with a threaded connection (thread connection pressure up to 0.3MPa); if it is a flanged connection, accurate flange specifications are required Only after the flange gauge has determined the flange specifications, can the corresponding antenna size be matched. Incorrect flange specifications may cause the instrument panel to fail to be installed on site.
5. Stirring specifications in the tank
When there is stirring in the tank, specific mixing specifications need to be incorporated, including several layers of fan blades, the distance of the fan blades from the tank wall, and the location of the fan blades. When installing the radar level gauge, try to avoid opening the fan blades to get the best measurement results.
6, flange takeover height
The height of the flange connection must be determined accurately because when the radar level gauge is installed, the antenna must reach into the tank, and the length of the radar antenna must be greater than the height of the connection. If the radar antenna is shorter than the takeover height, the measurement effect will be greatly reduced.
7, the average value of the tank
The variable of the tank is a parameter directly related to the accuracy of the instrument and must be determined correctly.