If a PM reading is .01 gr/dscf at 8% CO2, what is the corrected reading at 12% CO2?

To adjust the particulate matter (PM) reading from one concentration of carbon dioxide (CO2) to another, a correction must be made based on the change in CO2 levels. Typically, the correction for particulate matter readings accounts for the density differences introduced by varying concentrations of CO2 in the flue gas.

In this case, the PM reading at 8% CO2 is .01 gr/dscf. To correct this reading to 12% CO2, you need to account for the increase in dilution that occurs when moving from 8% to 12% CO2. This can be done using a conversion factor based on the relationship between the two CO2 concentrations.

The general formula for this type of correction is:

Corrected PM = Measured PM × (New CO2 Percentage / Old CO2 Percentage)

Applying this formula, the calculation would look like this:

Corrected PM = .01 gr/dscf × (12% / 8%)

Converting the percentages to a decimal form gives us:

Corrected PM = .01 gr/dscf × (0.12 / 0.08) = .01 gr/dscf × 1.5 = .015 gr/dscf.

Therefore, the