Online conductivity analyzers are widely used in industries such as water treatment, chemical engineering, and food to monitor the conductivity (EC value) of liquids in real-time, ensuring the stability and quality control of the process. Regular calibration and maintenance are crucial to ensure its accuracy and long-term stability. Here isOnline conductivity analyzerThe calibration and maintenance techniques help users effectively improve the performance and reliability of the instrument.

1、 Calibration method

1. Choose the appropriate standard solution: When calibrating, the first step is to select a suitable standard solution. The commonly used standard solutions are KCl solution (with different concentrations) and NaCl solution. The conductivity value of the standard solution should be within the measurement range, and the solution temperature should match the working temperature. Temperature has a significant impact on conductivity, so ensuring temperature consistency is crucial.

2. Use dual or multi-point calibration: Most support dual or multi-point calibration. Calibration using two or more standard solutions with known conductivity can improve measurement accuracy. Double point calibration generally uses low concentration and high concentration standard solutions to cover different parts of the measurement range.

3. Temperature compensation: The value of conductivity is affected by the temperature of the solution, so most are equipped with temperature sensors that can automatically perform temperature compensation. When in school, it is necessary to set the correct temperature compensation coefficient to ensure the accuracy of measurement data. If there is no automatic temperature compensation function, the solution temperature needs to be manually adjusted.

4. Recording and adjustment: The calibration process needs to be performed through a control panel or computer software. During the calibration process, the comparison value between the real-time measured conductivity and the standard solution will be displayed. If the error exceeds the set allowable range, the output needs to be adjusted to ensure accuracy. After completing the calibration, the calibration data will be automatically saved.

2、 Maintenance skills

1. Regularly clean the electrodes: The electrodes of an online conductivity analyzer are one of its most critical components. If there is dirt, deposition, or corrosion on the surface of the electrodes, it will directly affect the measurement results. Regularly use specialized cleaning solution to clean the electrodes and remove surface dirt and impurities. For sediment that is difficult to clean, it is recommended to use a milder acid washing solution for cleaning, but avoid using highly corrosive solvents.

2. Check the electrode connection and status: Whether the electrode connection is stable, whether there are corrosion or cracks, etc., can affect the performance of the instrument. Regularly check the condition of the electrodes to ensure their proper functioning. In addition, the plugs and terminals of the connecting wires should be kept clean to avoid poor contact.

3. Regularly replace electrodes: The electrodes have a lifespan and may experience performance degradation or malfunction after prolonged use. Generally speaking, the service life of electrodes is 1-3 years, depending on the usage environment and frequency. Regularly check the condition of the electrodes to ensure that they do not cause measurement errors due to aging. If necessary, the electrode should be replaced in a timely manner.

4. Monitoring instrument working status: Regularly check the working status, especially after calibration, to observe whether it stably outputs the expected conductivity value. Any abnormal situation (such as reading drift or fluctuation) needs to be noted and checked and adjusted in a timely manner.

The calibration and maintenance of online conductivity analyzers are crucial for their accuracy and long-term stability. By selecting appropriate standard solutions for calibration, ensuring accurate temperature compensation, and conducting regular cleaning, inspection, and electrode replacement, the service life can be greatly extended and the measurement accuracy can be improved. Regular maintenance and appropriate calibration can ensure that the instrument always provides accurate data support during the production process, thereby ensuring production quality and safety.