6-48 
 
3.  Select Begin to access the screen shown below. 
 
  The real-time fresh gas flow is displayed on the Calibrate Total Flow Sensor 
screen. Normally, only N2O and total flow values are greater than 0, and N2O 
and total flow values ascend with the increase of calibration progress. Air and 
O2 values should be 0 or small all the time.