1 every day to clean the external surface.  
21% oxygen concentration calibration with 2 weekly (oxygen sensor breathing circuit).
3 every two weeks emptying and discarded anesthetic vaporizer.  
100% oxygen concentration calibration with 4 per month (the oxygen sensor of the breathing circuit).
5 every year to replace the external O rubber ring evaporation tank on the port.
6 on-demand:
The installation of the new cylinder gasket cylinder yoke. The emptying water collector, replace the absorption in the tank.  
The replacement of the oxygen sensor breathing circuit (in normal use, the sensor performance in accordance with the specifications in a year).  
Replacement of the disposable plastic flow sensor (under normal circumstances, the performance of the flow sensor at least within six months in line with technical specifications).

2016.4.18