As a new type of liquid level gauge, radar level gauge has been widely used in petrochemical industry. Due to the lack of full familiarity with new equipment and mastery of troubleshooting methods, failures that cannot be resolved in time often occur in the production process, making the failures more serious. The next editor will talk about the editors you see on Hukeda’s instruments.
1. The fault type of the radar level gauge.1. The instrument hardware and software are faulty; upgrade the software, replace the equipment or return to the equipment for processing.2. The 4-20mA signal is lost. The main cause of the fault is incorrect wiring of the power supply, no power supply, low supply voltage, and high load resistance.3. The current signal is greater than 22mA or 0mA. This is a general breakdown of electronic parts.4. The 4-20mA signal is unstable. This failure is mainly caused by changes in the level.5. The radar level gauge with bypass tube has false echo.6. If the instrument is not tightly sealed, the instrument loop will malfunction.7. In winter, the antenna will freeze or freeze.2. The cause of the failure.1. The heavy and wet scars are strongly reflected by the microwave, which keeps the measurement value of the instrument at a certain high level.2. The antenna or nearby condensate will produce interference echoes during the discharge process.3. The failure of most of the instrument loops is caused by the intrusion of rainwater and other liquids, dust, moisture, etc. into the inside of the instrument.4. When the material is exhausted, the fixed parts in the fuel tank will cause a strong echo.5. Because the wall of the bypass tube has burrs, welding slag, welding seal and attached impurities, there is a false echo signal, which affects the detection of the true echo signal, and the radar level gauge shows a false level.3. Solutions.1. Check whether the circuit and power supply are actually connected, whether the wiring diagram is correctly installed, whether the cable is broken, whether the fuse is broken, etc., and repair it in time; when the voltage is too low or the load resistance is too high, please check and correct it.2. The use of computer software to remove false echoes is only a temporary method. To completely solve the problem of false echoes showing false liquid levels, the bypass pipe needs to be cleaned and polished. In addition, when purchasing, please note that the purchase quality is relatively good, to minimize measurement failures caused by such problems.3. In addition to regular inspection and cleaning, it is recommended to install heat preservation and heat exchange devices outside the radar level gauge to keep the temperature near the water tank opening basically unchanged.
Post time: 21-09-21