US 12,691,305 B1 · Method to calculate fit factor and protection factor with a dynamically changing background challenge

Abstract

A method for quantitatively evaluating the protective efficacy of a respiratory protection mask in an environment with a dynamic pollutant concentration, including providing a first air sampling unit and a second air sampling unit both electronically connected to a data acquisition system, obtaining a first pollutant reading of the environment with the dynamic pollutant concentration using the first air sampling unit, obtaining a second pollutant reading of the respiratory protection mask in the environment using the second air sampling unit, and determining a fit factor of the respiratory protection mask using the data acquisition system by dividing the first pollutant reading by the second pollutant reading. The method additionally includes determining a correction factor between the first air sampling unit and the second air sampling unit and applying the correction factor to the second air sampling unit using the data acquisition system.

Claims19

Dependent claims

A method for quantitatively evaluating the protective efficacy of a respiratory protection mask in an environment with a dynamic pollutant concentration, the method comprising:

providing a first air sampling unit and a second air sampling unit, both the first air sampling unit and the second air sampling unit electronically connected to a data acquisition system;
determining a correction factor between the first air sampling unit and the second air sampling unit and applying the correction factor to the second air sampling unit using the data acquisition system;
positioning the respiratory protection mask in the environment with the dynamic pollutant concentration, the respiratory protection mask forming a seal with a substrate;
obtaining a first pollutant reading of the environment with the dynamic pollutant concentration using the first air sampling unit;
obtaining a second pollutant reading of the respiratory protection mask using the second air sampling unit;
and
determining a fit factor of the respiratory protection mask using the data acquisition system by dividing the first pollutant reading by the second pollutant reading.

4 more elements

A method for quantitatively evaluating the protective efficacy of a respiratory protection mask in an environment with a dynamic pollutant concentration, the method comprising:

providing a first air sampling unit and a second air sampling unit, both the first air sampling unit and the second air sampling unit electronically connected to a data acquisition system, wherein the data acquisition system includes software configured to control the operation of the first air sampling unit and the second air sampling unit;
positioning the respiratory protection mask in the environment with the dynamic pollutant concentration, the respiratory protection mask forming a seal with a substrate;
obtaining a first pollutant reading of the environment with the dynamic pollutant concentration using the first air sampling unit;
obtaining a second pollutant reading of the respiratory protection mask using the second air sampling unit;
and
determining a fit factor of the respiratory protection mask using the data acquisition system by dividing the first pollutant reading by the second pollutant reading, wherein the software of the data acquisition system instructs the first air sampling unit and second air sampling unit to switch to clear where zero voltages for both the first air sampling unit and second air sampling unit are recorded, instructs the first air sampling unit and second air sampling unit to switch to downstream where a downstream voltage for the first air sampling unit is recorded and a downstream voltage of the second air sampling unit is recorded, and then calculates the fit factor according to:
Fit
⁢
Factor
=
(
(
Downstream
⁢
Volatge
⁢
of
⁢
first
⁢
unit
-
Zero
⁢
Voltage
⁢
of
⁢
first
⁢
unit
)
(
Downstream
⁢
Volatge
⁢
of
⁢
second
⁢
unit
-
Zero
⁢
Volate
⁢
of
⁢
second
⁢
unit
)
⋆
Correction
⁢
Factor
)

55 more elements

Dependencies are inferred from the claim text.

Method to calculate fit factor and protection factor with a dynamically changing background challenge

Life of this patent

Method to calculate fit factor and protection factor with a dynamically changing background challenge

Life of this patent

Abstract

Claims19