It might be necessary to scale the ozone measurement values with an additional correction factor. For instance, if another method (such as light absorption) is usable for measuring total ozone concentration, partial pressure values can be corrected to fit the inferred total ozone value with the total ozone measurement in question.
This can be done in the ground equipment software by modifying one of the scaling calibration coefficients of the sensor. Preferably, the pumping time for 100 ml of air is used for this correction.
tcorrected = t × Cref