25-8 
 
6.  Turn on and adjust the relief valve to make the flowmeter reads within 10-50 mL/min 
and keeps stable as well. 
7. In the [Calibrate CO
2
] menu, enter the vented CO
2
 concentration in the [CO
2
] field. 
8. In the [Calibrate CO
2
] menu, the measured CO
2
 concentration is displayed. After the 
measured CO
2
 concentration becomes stable, select [Calibrate CO
2
] to calibrate the 
CO
2 
module. 
9.  If the calibration is finished successfully, the message [Calibration Completed!] is 
displayed in the [Calibrate CO
2
] menu. If the calibration failed, the message 
[Calibration Failed!] is displayed. In this case, perform another calibration. 
 
 
25.7 Calibrating the Touchscreen 
1. Select [Main Menu][Maintenance >>][Cal. Touchscreen]. 
2. 
  will, in turn, appear at different positions of the screen. 
3. Select each 
  as it appears on the screen. 
4.  After the calibration is completed, the message [Screen Calibration Completed!] is 
displayed. Select [Ok] to confirm the completion of the calibration. 
 
 
25.8 Electrical Safety Tests 
Refer to E Electrical Safety Inspection. 
 
 
Flowmeter 
Tubing 
T-shape connector Monitor 
Relief valve 
Gas cylinder