How is the PORTACOUNT affected by fluctuations in ambient particle levels?

The PORTACOUNT takes an ambient particle measurement before and after each mask sample. The average of the two concentrations is used to calculate the fit factor. This eliminates problems with normal ambient fluctuations.

Persons using the PORTACOUNT should check the ambient particle count using count mode to make sure that there are no wild fluctuations. If fluctuations vary more than 20 percent in 60 seconds, then they should move to a more suitable location. More.

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