Tuning Fork Level Switch Related Information

 Introduction to working principle

The working principle of the tuning fork level switch mainly depends on the detection of vibration frequency. Its working process can be summarized into the following three steps:

• Vibration excitation: The piezoelectric ceramics equipped inside the tuning fork will drive it to vibrate continuously at a fixed frequency (usually about 1200 Hz).

• Liquid interference: As the liquid level rises, when the liquid surface approaches or contacts the tuning fork, the liquid will have a damping effect on the vibration of the tuning fork, which will cause its vibration frequency to drop significantly or the amplitude to gradually decay.

• Signal triggering: The electronic module monitors the vibration frequency change of the tuning fork in real time and compares it with the preset threshold. Once the frequency change exceeds the preset range, the electronic module will output the corresponding switching signal, such as relay action, to trigger an alarm or control device.

Technical advantages

The tuning fork level switch has the advantages of strong durability and wide adaptability, and can work stably in complex environments. Specific advantages include:

• Strong durability: The tuning fork level switch has no moving parts, thus avoiding mechanical wear and making its life up to 5-10 years.

• Wide adaptability: The switch can work stably in complex environments such as turbulence, scaling, disturbance and bubbles. It is not affected by liquid conductivity, viscosity or temperature and can be applied to a variety of media such as water, oil, acid and alkali liquid.

Installation points

When installing the tuning fork level switch, the choice of location is crucial. Avoid installing the tuning fork in areas with violent liquid surface fluctuations such as the feed inlet and stirring area to ensure that it can work properly. If vertical installation is selected, ensure that the fork body is completely immersed in the liquid to achieve the best measurement effect. In addition, when installed horizontally, the direction of the fork body should be adjusted to keep it parallel to the direction of liquid flow to prevent damage caused by impact.

Debugging process

After the tuning fork level switch is installed, the next key step is debugging. The purpose of debugging is to ensure that the switch can work accurately and stably. First, check whether the wiring of the tuning fork level switch is correct and whether the power supply is stable. Secondly, it is necessary to calibrate according to the instruction manual provided by the manufacturer to ensure the accuracy of the measurement data. Finally, conduct actual use tests to observe the performance of the tuning fork level switch in various situations to ensure that it can meet actual needs. Through these debugging steps, you can ensure that the tuning fork level switch can work normally and reliably.

• Power-on self-test: When debugging, first ensure that the power supply voltage is stable, usually 24 VDC, and observe whether the indicator light flashes normally.

• Sensitivity calibration: Use the knob or software to carefully adjust the sensitivity of the tuning fork level switch to ensure that the signal can respond without delay when the liquid level is triggered, that is, the response time does not exceed 1 second.

• Simulation test: By manually blocking the tuning fork, observe whether the output signal can switch normally, so as to verify whether the switch function is intact.