226  AO2000 CONTINUOUS GAS ANALYZERS  |  OI/AO2000-EN REV. B 
 
 
 
Calibration data for manual calibration 
Menu path 
MENU → Configure → Calibration Data → Manual Calibration  
→ ... 
Test gas concentration 
The zero and span test gas concentrations to be used as set points for 
manual calibration need to be set for the selected sample component and 
measurement range. 
Calibration method 
The method for manual calibration (see page 223) needs to be set. 
For …  Select …: 
Common calibration  The sample component and the measurement 
ranges for zero and span calibration for the se-
lected component. 
Substitute gas calibra-
tion 
The (substitute gas) components for zero and 
span calibration and the measurement range for 
the selected component. 
NOTE 
The components and measurement ranges settings apply to manual, auto-
matic and externally controlled calibration. 
Drift calculation 
In MENU → Configure → Calibration data → Drift calculation, it 
can be set if the relative drift between two calibrations is calculated only for 
automatic calibration or for both automatic and manual calibration. 
Only one relative drift value is saved, i.e. if an automatic calibration is con-
figured and active and a manual calibration is performed the relative drift is 
calculated relative to the last automatic calibration and vice versa.