Radar level gauges are widely used in fields such as petroleum and chemical engineering due to their non-contact measurement advantages, but standardized operation is the key to ensuring accuracy. The following core considerations from selection to maintenance can effectively reduce failure rates and improve data reliability.

1、 Selection and adaptation: precise matching of working conditions and requirements

Frequency selection directly affects the measurement effect: scenes with more dust or foam are preferred6GHzLow frequency models are suitable for measuring clean liquids26GHzHigh frequency model, data stability improved after a chemical plant replaced the high-frequency model40%The medium adaptation needs to be precise, and for liquids containing suspended solids, a model with signal processing function should be selected. High temperature volatile media should be equipped with condensation function. A certain refinery has used this to improve stability45%At the same time, it is necessary to confirm that the range covers the height of the storage tank and blind spots (usually)0.2-0.5m）It should be below the minimum liquid level to avoid measurement blind spots.

2、 Installation specification: Avoid signal interference

The installation location should be far away from sources of interference such as the feed inlet and mixer, and at least from the tank wall200mmOr the diameter of the can1/6It is prohibited to install it in the center of a circular tank to prevent multiple false echoes. The top mounted type is suitable for above ground storage tanks, and the side mounted type is suitable for underground storage tanks. After installation, the probe needs to extend into the interior of the tank at least10mmThe diameter of the connecting pipe shall not exceed the length of the shielding tube. The verticality error should be less than1The beam angle is selected according to the accuracy requirements, and the wavelet beam angle (such as8Although precise, the coverage is narrow and requires balanced adaptation.

3、 Daily maintenance: Extend lifespan and ensure accuracy

Regular cleaning is the core: Crystalline or viscous media need to clean the antenna every month, and models with backwash function can be selected to reduce this in a certain smelting plant70%Failure rate. The wiring terminals must be sealed and isolated, and the header or cabinet must be grounded at a single point to prevent electromagnetic interference. The calibration cycle needs to be strictly controlled, and every high-precision scenario6 Once a month, once a year for regular scenarios, calibration requires ±1mmPrecision standard liquid level source. If the internal temperature of the high-temperature environment exceeds50℃, it is necessary to use a copper tube to blow air and cool down, and direct flushing with ice water is prohibited.

4、 Fault response: Quickly locate and solve the problem

When the display value is not accurate, first check the contrast setting and plug connection, the current is greater than22mANeed to replace display module, less than3.5mAReplace the electronic module. The signal loss is mostly caused by antenna contamination or foam interference. Cleaning the antenna or using the foam suppression algorithm can solve the problem. A electroplating factory takes this opportunity to improve30%Data validity. System errors are often caused by power outages leading to abnormal data. Simply verify, reset, and recalibrate to restore the system. If it is ineffective, the electronic module needs to be replaced.