What is the general situation of troubleshooting for radar level gauges? In fact, we don’t have many opportunities to come into contact with radar level gauges in our lives, but if you are engaged in equipment monitoring, you may have to monitor its data and operations every day. After all, some jobs can’t go wrong.Fault handling of radar level gaugeFault handling of radar level gaugeThe radar level gauge is a new type of liquid level measuring instrument, which is widely used in the petrochemical industry. In the production process, because people lack sufficient understanding of this new type of instrument and troubleshooting methods, when the radar level gauge fails When the problem was solved in a timely and effective manner, the malfunction of the radar level gauge was exacerbated.Aiming at the common problems of radar level gauge faults, some solutions are proposed. Using theoretical analysis and field test methods, the reasons for the level gauge failure are briefly explained, the reasons for the failure are analyzed and demonstrated, and finally the handling of radar level gauges is summarized. Some methods of failure. The following are common faults of radar level gauges and their possible causes:1. There is an error in the measured valueThe fault indicates that the change trend of the actual liquid level is the same as the measured value, but the value is not equal. This is a common, simple, and easy-to-treat fault.The traditional rope method is used to measure the true distance in the sky. If the measured value is consistent with the distance of the instrument, it proves that the quality of the instrument itself is no problem. It can be seen from the working principle of the radar level gauge that the actual liquid level is obtained by subtracting the distance D from the measurement reference point to the surface of the medium from the distance E of the empty tank. In order to ensure the accuracy and reliability of the measurement, the height of the empty tank must be Accurate and accurate. Therefore, in order to obtain the most true data, the actual liquid level must be measured on site before calibration. If the instrument is connected to a computer system, you should also check whether the full-scale parameters of the instrument are consistent with the computer configuration data.Second, the measured value is obviously distorted.The fault is characterized by changes in the liquid level and constant measured values. When the tank is emptied or filled, the instrument will maintain an obvious false material level, or when the tank is full, the material in the container will rebound to a lower value. This failure is usually caused by the following reasons:(1) Antenna scar. Thick and wet scars will produce strong reflections on the microwave, keeping the measured value of the instrument at a constant high level.(2) When the material is emptied, the antenna or nearby condensed water will produce interference echoes.(3) The fixed components in the tank will produce a strong echo when emptying materials. In view of the above situation, the following methods should be adopted to solve the above situation:(I) Carefully clean the antenna and the accessories near the antenna.(2) Reasonably activate and set the window resistance distance. The instrument eliminates the influence of flange welds, antenna or nearby suspension materials on the measurement by setting the near-field suppression distance, which is an effective means to optimize the measurement. The instrument records the echo within this range as an unmeasured interference echo by setting the near-field suppression distance.
Post time: 21-09-21