In the event that no burning fuel. To calculate the effect that atmospheric pressure of 760 mmHg 1 or at temperature of 25° c, dry condition (Dry Basis) by volume oxygen. In real conditions, while exhaust measurements.
In the absence of combustion. To calculate the pressure of one atmosphere or 760 mm Hg at 25 ° C, dry conditions (Dry Basis) by volume of oxygen. In bad weather conditions prevailing in the measurement time.
In the absence of the fuel combustion, calculate the pressure of one atmosphere, or 7 60 mm Hg at 25 degrees Celsius temperature dry. (Dry Basis) by volume of oxygen in air condition true while measuring instrument