二氧化碳测量原则
室内空气二氧化碳浓度的测量取决于测量员的个人需要。基本上，区分两种不同的测量要求。
- 固定式测量，恒定的，需符合HVAC（加热、通风和空调）系统的规定。
- 便携式测量，使用手持式仪器在任何选定位置进行零星测量，例如：工作场所评估。
如何避免测量误差？
The following points must be taken into account to get a reliable result when taking a measurement:
- Both fine dust and condensation influence the optical path and therefore the measurement.
- After the instrument is switched on, there is a sensor warm-up phase of approx. 30 s.
- If the ambient temperature changes (change of measuring location, e.g. indoors to outdoors or vice-versa), the probe needs a few minutes to adjust.
- The CO2 concentration in the sensor requires approx. 60 s to adjust to the environment.
- As a rule, normal air movement is all that is needed for sufficient mixing of the CO2 gas with the other components of the air.
- The content of the air we have breathed is approx. 40,000 ppm CO2. Therefore, you should not breathe directly on the probe or in its direction.