BeneVision N22/BeneVision N19 Patient Monitor Service Manual                    3-9
AA represents an anesthetic agent. Precision requirement: a/c ≤ 0.01 (a is the gas absolute concentration 
accuracy; c is the gas concentration)   
  T-shape connector 
  Tubing 
  Flowmeter 
 
1.  Plug the AG module into the module rack. 
2.  Wait at least 10 min and then perform a leakage test to make sure that the airway has no leakage.   
3.  Connect the test system as follows: 
 
4.  Open the relief valve, and adjust it until the flowmeter has a stable reading between 10 ml/min and 50 ml/min. 
5.  Verify that the concentration of each composition meets the specification stated in the Operator's Manual. 
 
 
Calibration 
Tools required: 
  A supply of medical grade 100% O2 and an anesthetic calibration gas (4% Desflurane, 6% CO2, 45% N2O, Bal O2, 
P/N: 0075-00-0048-01 and flow regulator P/N: 0119-00-0235). Gas concentration should meet the following 
requirements: 
  AA ≥ 1.5%, CO2 ≥ 1.5%, N2O ≥ 40%, O2 ≥ 40%, of which AA represents an anesthetic agent.   
  a/c ≤ 0.01 (a is the gas absolute concentration accuracy; c is the gas concentration) 
  T-shape connector 
  Tubing 
 
Follow this procedure to perform a calibration: 
1.  Select Main Menu  →  Maintenance  →  enter the required password  →  Module  →  AG.   
2.  Check the airway and make sure that there are no occlusions or leaks. 
Monitor 
T-shape connector 
Tubing 
Relief valve 
Flowmeter 
Gas cylinder