148  AO2000 CONTINUOUS GAS ANALYZERS  |  OI/AO2000-EN REV. B 
 
 
 
Operating by key entry 
Key entry 
Key entries are made during measurement mode by pressing the number 
key that corresponds to the position of the display element on the display 
and that is indicated over the display element.   
In the example, this is key 4:   
 
A softkey line then appears with the configured keys: 
 
Description and configuration 
Further information can be found in sections "Key entry" (see page 209) and 
"Configuring key entry" (see page 210).