如何避免测量误差?

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。
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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.