Tuning fork liquid level switch is an indispensable measuring instrument in modern industrial production. With the installation of a highly reliable tuning fork liquid level switch, people can grasp the change of liquid level in real time and perform intelligent control, which provides safe production and efficient operation. ensure. So, what is the measuring principle of the tuning fork level switch? What are the precautions?1. Measuring principle of tuning fork liquid level switchThe tuning fork liquid level switch adopts piezoelectric devices to realize the vibration drive and detection of the fork body. When the fork body contacts the liquid to be measured, the resonance frequency of the fork body is significantly reduced, and the change of the vibration frequency is directly reflected on the output signal of the piezoelectric detection device. The detection circuit distinguishes the change in frequency and outputs a switch signal.When measuring the high point, when the fork body contacts the liquid medium, the meter will generate an alarm signal; when measuring the low point, if the liquid medium is lower than the position of the fork body, the meter will also generate an alarm signal. As for whether to install the tuning fork liquid level switch at a high point, a low point, or both high and low points, it depends on the needs of the job site.2. Precautions for tuning fork liquid level switch measurementGenerally speaking, in order to ensure the reliable measurement of the tuning fork level switch, the following points need to be paid attention to:1. Theoretically speaking, the tuning fork liquid level switch can be installed in any position as needed, but if it is installed at the feed inlet position, the measurement error may even damage the meter. Therefore, when installing the tuning fork liquid level switch, try to avoid it. Import and export of materials for installation.2. The tuning fork liquid level switch can be installed horizontally, vertically or inclinedly. But if the measured medium is relatively viscous, in order to reduce or avoid the phenomenon of hanging materials, the tuning fork liquid level switch should be installed vertically.3. When installing the tuning fork liquid level switch, in order to make the meter more accurately detect, the fork body should be kept parallel to the liquid lifting or flow direction to avoid the phenomenon of hanging materials and prevent the resistance of the medium to the fork body from measuring. The data is biased to improve the accuracy of the measurement.4. When the electronic components are damaged or malfunctioning, in order to make the instrument continue to work normally, it is recommended to replace the electronic components of the tuning fork level switch.
If the signal output modes of electronic components are different, adjustments should be made accordingly to select electronic components that meet the requirements. If the actual working conditions have explosion-proof requirements for the tuning fork level switch, pay attention to using electronic components that meet the corresponding explosion-proof requirements when replacing it.
Post time: 21-09-21