As a core equipment for industrial and environmental monitoring, the accuracy and stability of CO ₂ analyzer directly affect production safety and data reliability. From daily calibration to fault diagnosis, scientific maintenance is the key to extending equipment life and ensuring performance.
Daily calibration: the cornerstone of accuracy
Zero calibration needs to be performed in pure air. Enter the "Zero" option through the operation interface, confirm and display "OK" to complete. The range calibration criterion requires the use of standard gas. Place the standard gas cover on the gas cup and adjust the flow rate to 0.4-0.5L/min. After the value stabilizes, compare the displayed value with the concentration of the standard gas and adjust it to consistency through the menu. When monitoring the concentration of CO ₂ in pipelines, the factory uses zero point and range calibration to ensure that the displayed value of the detector matches the standard gas value, ensuring the accuracy of the data. The recommended calibration cycle is once every 3-6 months. If the usage environment is harsh or the detection accuracy is high, it should be shortened to once a month.
Daily maintenance: Details determine success or failure
Air path cleaning is the core process. Check the pressure and flow rate daily to ensure they are normal, check if the filling material in the pre-treatment system has deteriorated, discolored, or become dirty, and ensure that the sampling gas is clean and dry. For example, in a certain greenhouse, the moisture filter was not replaced in a timely manner, resulting in a deviation in the detection data. After replacement, it returned to normal. Regular cleaning of infrared light sources, filters, and detectors is required for the maintenance of optical components to prevent dust from adhering and affecting performance. Environmental management is equally important, and equipment should be placed in a dry, ventilated, and non corrosive gas environment to avoid sensor aging caused by high temperature and humidity.
Fault diagnosis: Quickly locate the problem
Sensor malfunction is a common problem, manifested as inaccurate detection data, slow response, or no signal output. If the detector in the refrigerator displays a CO ₂ concentration of zero, it may be due to the sensor being damp; If there is a deviation in greenhouse data, it may be due to sensor aging. Circuit faults require inspection of power connections and circuit systems to ensure no looseness or aging. Blockage in the gas path can lead to abnormal data. For example, in a certain analyzer, the pipeline from the humidifier to the sample chamber is blocked, resulting in low hydrogen sulfide data. The problem can be solved by blowing the pipeline.
Preventive measures: Extend equipment lifespan
Establish maintenance records to document each calibration, cleaning, and repair to facilitate tracking of equipment status. Regularly replace vulnerable parts such as filters, batteries, etc. to avoid affecting overall performance due to small component failures. For example, a food processing plant has reduced equipment failure rates by 50% by regularly replacing filters.
The maintenance of CO ₂ analyzer needs to be carried out throughout the entire process of daily calibration, detailed maintenance, fault diagnosis, and preventive measures. Through scientific management, the long-term stable operation of equipment can be ensured, providing reliable support for safety production and environmental protection.