7-57 
 
10.  If the calibration is finished successfully, the message [Calibration Completed!] is 
displayed. Otherwise, the message [Calibration Failure! Please try again.] is 
displayed. In this case, you need to do the calibration again
.
 
NOTE 
  If the calibration fails, you can select [Defaults] to restore the factory default 
calibration values. If the deviation is great, select [Calibrate] again to do a 
calibration. 
  If the calibration still fails, replace the AG module. 
 
 
7.3.9.3 Commonly-encountered Problems and Recommended Actions   
Failure description  Possible cause  Recommended action 
Calibration menu is 
inaccessible. 
The AG module is not fully warmed up 
or not in measure mode. 
Wait for the AG module to be 
fully warmed up and then access 
the calibration menu. 
Calibration is not 
completed. 
1. The module is damaged. 
2. The difference between the set AG 
calibration concentration and the 
selected standard AG concentration is 
too great. 
1. Return the module to factory 
for repair. 
2. The difference between the 
standard gas concentration and 
the set calibration concentration 
cannot exceed 25% of the 
standard gas concentration. 
 
7.3.10 O2 Module Calibration (factory) 
7.3.10.1 Preparations 
Calibrate the O2 module once a year or when the measured value has a great deviation. Prepare 
the following before doing the calibration: 
  Gas cylinder with 100% O2 and the O2 concentration not less than 99%. 
  T-shape connector 
  Tubing 
 
7.3.10.2 Calibration Procedures 
NOTE 
  Do not calibrate the O2 module when there are significant leaks in the airway. 
  In case of calibration failure, select [Calibrate] again to do a calibration. 
  If the calibration still fails, replace the O2 module. 
  Calibrate the O2 module, if it has been transported for long distance or if you 
suspect it does not work properly. 
 
Follow this procedure to perform a calibration: 
1.  Make sure that the system is not Standby and the AG module is in [Measure] state. 
2.  Wait for the AG module to be fully warmed up. 
3. Select the [Maintenance] shortcut key → [Factory Maintenance >>] → enter the 
required password → [Factory Cal. >>] → [Gas Module Cal. >>] → [O2 Module 
Cal.].