As an example if calibration points were, 17 cmH2O 2403 counts and 46 cmH2O required 2600 counts and the value was 30 cm H2O the calculated power for this would (2600 - 2403) / (46 - 17) * (30 - 17) + 2403 or 2491. The PEEP valve would be set to 2491 and the flow valve to 30 LPM. So IF the Airway pressure was calibrated correctly, and IF the PEEP valve was calibrated correctly and IF the curve between the calibration points is linear and there are no leaks in the drive gas circuit, then the set pressure should be achieved. linear curve.