MeshGuard LEL IR & CO2 IR User’s Guide 
 
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5.9.1.  Entering Programming Mode 
To enter the Programming Mode, press [MODE] and [N/-] for 3 seconds while the instrument is on. 
“Pro” appears in the display:  
 
Pressing [N/-] steps you through all the screens and then returns to the first programming display: 
 
Each display alternates between its name and a status message or value. 
Note: You can exit Programming Mode at any time by pressing [MODE]. Also, if you do not make a 
change within one minute, the instrument exits Programming Mode and returns to Detection Mode.