Capacitive level gauge is a common liquid level measuring instrument, which works by measuring the capacitance value of the capacitor to determine the liquid level height. In practical applications, due to environmental factors and errors in the instrument itself, the measurement accuracy of the liquid level gauge is often affected to a certain extent. Therefore, regular calibration is needed to ensure the accuracy and reliability of the measurement results. The following are two common calibration methods.

　　

1. Static calibration method

　　

Static calibration method is a commonly used method for calibrating liquid level gauges. The specific steps are as follows:

　　

(1) Install the liquid level gauge on a standard container to ensure that the system is in a static state.

　　

(2) Add standard liquid level and record the reading.

　　

(3) Repeat the above operation while changing the standard liquid level height.

　　

(4) Draw the relationship curve between standard liquid level and capacitance value based on the recorded data.

　　

The static calibration method can obtain a relatively accurate calibration curve for the liquid level gauge, but it should be noted that when drawing the curve, the continuity, stability, and repeatability of the collected data should be ensured as much as possible.

　　

2. Dynamic calibration method

　　

The dynamic calibration method requires the use of special equipmentCapacitive level gaugeSimulate. The specific steps are as follows:

　　

(1) Connect the simulated capacitor to the liquid level gauge.

　　

(2) By adjusting the capacitance value of the simulated capacitor, simulate the changes in liquid level and record the corresponding readings.

　　

(3) Based on the recorded data, obtain the coefficient relationship between the measured value of the liquid level gauge and the actual liquid level.

　　

The dynamic calibration method can simulate complex working environments and calibrate for different liquid level heights, but requires special equipment and professional technical support.

　　

Whether it is static calibration or dynamic calibration, when calibrating capacitive level gauges, we must pay attention to the following matters:

　　

1. Before calibration, a comprehensive inspection of the liquid level gauge should be conducted to ensure the normal operation of the equipment and system.

　　

2. During the calibration process, safety precautions should be taken to avoid damage to personnel and equipment.

　　

3. When performing static calibration, appropriate standard liquid levels and standard containers should be selected, and the testing environment should be kept stable and consistent as much as possible.

　　

4. When performing dynamic calibration, attention should be paid to the accuracy and stability of the equipment, and the actual usage environment should be simulated as much as possible.

　　

5. After calibration, verification should be carried out to verify the reliability and accuracy of the calibration results in actual use.