How to check whether the concentration detection of a carbon dioxide detector is abnormal?
1, Clarify the characteristics of the scene
The normal range of carbon dioxide concentration varies in different environments:
The outdoor atmospheric concentration is usually in a natural fluctuation state, influenced by vegetation, industrial activities, etc; The concentration of ordinary indoor environments such as residences and offices is related to personnel activities and ventilation conditions;
The concentration in densely populated areas such as conference rooms, classrooms, or enclosed underground parking garages is more likely to increase due to insufficient air circulation; The concentration of industrial or special-purpose space greenhouses needs to be determined based on specific process requirements.
Troubleshooting the instrument and confirming the reliability of the data
1. Calibration and maintenance status
Confirm whether the carbon dioxide detector is calibrated according to the prescribed cycle, usually once a year. Exceeding the calibration cycle may result in data deviation due to sensor drift;
If the gas detector equipment is not used for a long time or comes into contact with dust and water vapor, it may affect the sensitivity of the sensor. You can observe whether it can initialize normally after turning on.
2. Hardware and display abnormalities
Pay attention to whether the carbon dioxide detector displays error codes (such as "ERROR"), or if there are data jumps, fixed value displays, etc., which may be circuit or sensor faults;
If the device has a long service life, such as electrochemical sensors exceeding 2-3 years, and even after calibration, the data is still unstable, it may be necessary to replace the components.
Abnormal Confirmation and Handling Process
1. Preliminary judgment
When the data on the carbon dioxide detector is significantly different from the actual environmental conditions, such as when the outdoor detection value is much higher than the natural level, or when the concentration in a closed space continues to rise, it can be judged as abnormal;
Prioritize improving the environment through ventilation and other measures, observe whether the concentration drops, and distinguish whether it is a temporary ventilation problem or a persistent anomaly.
2. Cross validation
Use another calibrated carbon dioxide detector to detect at the same location. If the data is consistent, it indicates that the original instrument data is reliable; If there is a significant difference, it is necessary to troubleshoot the instrument.
3. Professional handling
If you suspect that the carbon dioxide detector being used is malfunctioning, contact a professional organization for calibration or repair; If it is confirmed that there is an abnormal concentration in the environment, such as an unexpected increase in industrial sites, personnel need to be evacuated immediately, ventilation needs to be strengthened, and the source of leakage needs to be investigated.
