Common faults and solutions of radar level gauge

Due to the complexity of the measured object, high temperature, high pressure and high corrosion, as well as serious damage to the radar level gauge due to foam, stirring, steam and many other reasons, the radar level gauge will fail. The common faults of the radar level gauge are listed below. Approach. 1. Check whether the power supply is normal If the radar level gauge changes very slowly after the liquid level rises to a certain value, you should immediately check whether the power supply of the radar level gauge is normal, and the relevant staff should also check the radar in detail during daily maintenance. The power-on status of the liquid level gauge, whether there is normal output after power-on. If the liquid level changes slowly or does not change at all, it is necessary to check whether the fuse of the equipment is burned out. If there is no current output, it can basically be judged that there is a problem with the instrument, and it should be replaced or repaired according to the situation. In addition, management should be strengthened in the process of instrument installation and commissioning to prevent inaccurate instrument parameter settings from affecting production. Relevant staff also need to strengthen daily maintenance work, and conduct regular outages for maintenance, so as to ensure the normal operation of the radar level gauge. 2. Check whether the communication equipment is normal Once the communication equipment is found to be abnormal, you can install the radar debugging software to read the radar configuration data and monitor the status of the radar sensor. Mainly check that the radar sensor can accurately judge the difference between the reflected echo and the false echo, and whether the intensity of the reflected wave reaches the predetermined standard. If there is no problem with the above test, you need to check other electronic components. If the communication unit is damaged, it is necessary to replace the components according to the situation, so as to ensure the normal communication of the radar level gauge. Relevant staff should also strengthen the inspection of the communication of the radar level gauge in the daily maintenance work. They can use the radar debugging software to access the signal line, and use the regulator to maintain the communication equipment of the radar level gauge. 3. Use temperature In order for the radar level gauge to measure normally, it should be ensured that the internal temperature of the radar level gauge is lower than 50 °C. Generally speaking, radar level gauges are used to measure high temperature media. Therefore, the shell of the radar level gauge is made of materials with strong heat resistance, so under normal circumstances, the interior of the radar level gauge will not exceed 50 °C. If the internal electronic components exceed this value, ice must not be used. Water is used for cooling and cooling, and ice water will not only not play a role in cooling and cooling, but even paralyze the radar level gauge. A small amount of wind can be blown into the radar head with a copper pipe to scientifically reduce the internal temperature of the radar level gauge. 4. Inaccurate display value Inaccurate display value is a common problem of radar level gauges. The cause of inaccurate display value may be that the initial setting contrast is not appropriate, or because the plug-in connection of the display module is incorrect, the relevant staff This problem should be avoided as much as possible. Once it is found that the displayed value is not visible, the initial setting of the radar level gauge should be checked, and the connection of the display module plug-in should be checked. Whether the output current of the level gauge is normal, if the output current is greater than 22mA, it can be judged that the display module of the radar level gauge is faulty and needs to be replaced in time. If the output current is less than 3.5mA, it can be judged that the electronic module of the radar level gauge is faulty, and the electronic module of the radar level gauge needs to be replaced in time. 5. The system displays error information The system of the radar level gauge often displays error information. Generally, the cause of this failure is that the power supply is cut off before the end of data storage, and it needs to be calibrated, reset and re-calibrated. If the alarm still sounds after the calibration is reset and re-calibrated, the electronic module of the radar level gauge needs to be replaced. 6. When the antenna is contaminated or crystallized, the possibility of antenna contamination and crystallisation should be considered first. The solution is to wear suitable protective equipment after power off, remove the radar and put it down tilted, and wipe off the dirt with a rag Or crystals, do not let the antenna bend and damage, handle it with care, and avoid scratching with iron, so as not to damage the antenna skin. 7. If the liquid level is low or there is no liquid level in diffuse reflection, the main reason may be that there are brackets and pipes at the bottom of the test container, or steam is generated during the process, which forms diffuse reflection to the radar wave and causes the liquid level to fail. , at this time, you can wait until the process liquid level is normal, restart it and it will automatically recover. The diffuse reflection caused by steam will automatically recover when the temperature is normal.
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