Online ozone analyzer is a commonly used instrument in environmental monitoring, industrial production, and air quality monitoring, used for real-time detection of ozone concentration in air or water. Regular calibration and maintenance are particularly important to ensure its accuracy and reliability. The following will provide a detailed introduction to the basic methods and technical points of calibration and maintenance.

1、 Calibration techniques

Calibration is to ensureOnline ozone analyzerThe key step in accurately measuring ozone concentration. The purpose is to correct the deviation of instrument readings by comparing with known concentrations of ozone gas. Its calibration usually requires the use of standard ozone calibration gas and professional equipment.

(1) Zero point calibration

The purpose of zero calibration is to eliminate errors caused by internal environmental factors of the instrument, such as temperature and humidity changes. When calibrating, the instrument should be operated in an environment without ozone gas and the instrument display should be adjusted to zero. Zero calibration should be performed regularly, especially after seasonal changes or equipment movement.

(2) Span calibration

Span calibration is achieved by inputting a known concentration of ozone standard gas and adjusting the instrument to make its reading consistent with the standard value. The concentration of standard ozone gas is generally provided by professional gas suppliers and accurately measured. When conducting span calibration, it is important to ensure stable environmental temperature and humidity to avoid external factors affecting the measurement results.

(3) Multi point calibration

To improve the accuracy of calibration, it is recommended to perform multi-point calibration, which involves calibrating at different concentration levels. This helps to cover the response of the instrument in different measurement ranges, ensuring full range accuracy. Usually, low, medium, and high ozone concentration points can be selected for calibration.

2、 Maintenance technology

Regular maintenance is a necessary measure to extend the service life of online ozone analyzers and ensure their stable operation. Its maintenance mainly includes the following aspects:

(1) Sensor maintenance

The core component is an ozone sensor. Sensors may experience sensitivity degradation or failure due to prolonged use, aging, or environmental factors. Therefore, regularly checking the working status of sensors, cleaning sensor surfaces, and updating sensors are all important maintenance tasks. Usually, the service life of sensors is 1-2 years, and they should be replaced promptly after reaching their service life.

(2) Cleaning of filters and intake pipes

Usually equipped with filters and intake pipes, it is used to clean the external air and prevent impurities such as dust and oil mist from entering the interior of the instrument. Regular inspection and cleaning of these components can prevent the accumulation of pollutants, ensure smooth gas sampling channels, and reduce analysis errors.

(3) Circuit and display section inspection

The circuit part involves power supply, signal transmission, and other aspects. Circuit damage or looseness may cause the instrument to malfunction. Regularly check the cable connections, signal outputs, and display status of the instrument, promptly identify potential electrical faults, and carry out repairs or replacements.

The calibration and maintenance techniques of online ozone analyzers are directly related to the accuracy of their measurement results and the long-term stability of the instrument. Through regular calibration and maintenance, not only can the accuracy of analysis results be ensured, but the service life of equipment can also be extended, reducing the probability of failure. Proper operation and maintenance standards are crucial for achieving accuracy and reliability in environmental monitoring.