A company uses a radar level meter to measure the liquid level of a pre-de silicon tank, which is a slurry tank with an agitator and tracer tube. It is 20 meters high and 10 meters in diameter.
The installation position is at the top of tank 1,6D to avoid the stirring paddle and does echo interference suppression. But just installed, production after a period of time dead, running no response, the LCD display remains the same.
After replacing the level meter or the same, so check the echo curve, interference suppression is normal. After several viewings and analyses, the cause was finally determined to be the high temperature, the temperature of the electronic components of the instrument exceeded 65 degrees, the production process to maintain the temperature of the slurry, and the temperature will be transmitted to the head of the radar level meter so that the temperature can not dissipate more than the working temperature of the electronic part.
The solution was to add a heat sink or change to a high-temperature type. After the modification, the instrument return curve was normal and worked properly.