Advantage analysis of small launch angle of ultrasonic level gauge

In the actual application situation, the ultrasonic level gauge will often have a fault. When the fault occurs, the user should know how to eliminate it. This article describes the Jiangsu Zhongneng Instrument.
Advantage analysis of small launch angle of ultrasonic level gauge Release time: 2013-12-9 7:50:02


In the actual application, the ultrasonic level gauge will often have a fault. When the fault occurs, the user must know how to eliminate it. The working principle of the ultrasonic level meter is that the ultrasonic transducer (probe) emits high-frequency pulse sound waves. The surface of the measured material (material) is reflected back to the reflected echo. The echo is received by the transducer and converted into an electrical signal. The multi-pulse low-voltage multi-point emission transmitting circuit of the ultrasonic level meter, double-balanced noise-reducing multi-point receiving circuit (QF- 9000 series): Improve the reliability of the instrument, solve the problem of inaccurate measurement of non-level unevenness, and greatly enhance the anti-interference ability. It can work stably near the substation tower. Advanced detection technology, rich software functions to adapt to various complexities Environment. The suppression function with interference echo ensures the authenticity of the measured data. Automatic power adjustment \ gain control \ temperature compensation. The sensor is made of PTFE material and can be used in various corrosive applications. Using new waveform calculation technology to improve the instrument measurement accuracy.

When the ultrasonic level meter is used, when the fault indicator light is always on, it may be a problem of installation. In addition, another distinctive feature is that the ultrasonic wave is emitted in addition to the flat head. If the zero position is continuous, the metal bracket is used for the mounting part. The ultrasonic level gauge will recognize that the signal strength of the bracket part is greater than the signal strength received by the plane head. The metal bracket part is in the dead zone distance from the transmitted wave. Therefore, the ultrasonic wave is in the protection state, the fault light is always on, and the output is 22MA. The solution is to use a non-metallic bracket. Because the non-metallic bracket is used, the transmitted wave at the thread can penetrate, and the echo signal of the zero liquid level will definitely It is larger than the echo signal at the thread. After debugging and reprogramming, the top fault light is always on, and the output current is 22MA. This fault condition occurs, after actual verification, it is still in the process of programming and debugging, it fails to follow the instructions. The resulting program is disordered and self-protected. The customer is programming the ultrasonic level timer, failing to wait until the indicator light flashes normally, or the programming method step is not at all. In the unstable programming and debugging. If the programming is not repeated according to the requirements, the ultrasonic level gauge will refuse to work and protect itself. The solution to this fault is to reset the ultrasonic level gauge as required. Programming. If the program is reprogrammed multiple times without reset, the above fault will occur.

When the ultrasonic wave continues to zero level, the top light is on, and the output current is 22MA. When the liquid level is restored after a period of time, the fault cannot be automatically cancelled, and it needs to be turned off after the power is turned off, which brings unnecessary trouble or even loss to the customer. The highly cost-effective product of the level gauge can truly solve the customer's requirements for automatic detection and control of liquid level, and maximize cost savings.

Zhongneng Instrument Expert also tells the accident when the user encounters the blue fault light on the top of the ultrasonic level gauge. To solve the problem that the fault light is always bright, the design of the ultrasonic level gauge must be understood. The ultrasonic level gauge is 0 degree emission. Angle is the smallest angle of global emission. The advantage of small launch angle is that it can gather energy well, and it has better penetration for foam, steam, mild dust, etc. It can be directly applied to narrow occasions, thus improving Applicability and accuracy of the product. When no echo is received and the internal software is faulty, the top blue indicator light is always on.
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