MeshGuard LEL IR & CO2 IR User’s Guide 
 
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5.9.6.  Change Low Alarm 
At the Change Low Alarm menu, “Set” and “go” flash in alternation, and “LOW“ and “ALARM” are 
visible in the display. 
 
         
 
Press [Y/+] to enter and change the setting. Press [MODE] to exit and return to Detection Mode or 
[N] to advance to the next menu. 
The LCD displays current value. Change the value if necessary. (LEL value is shown here.) 
 
To change the value: 
1.  Press  [Y/+] to increase the number and [N/-] to decrease it. 
2.  Press [MODE] to advance to the next digit. 
3.  After moving to the last digit and making changes, press [MODE]. A question mark (?) is shown 
in the display, asking if you want to save the change. 
•  Press [Y/+] for yes. The message “dn” means the change is done. 
•  Press [N/-] for no. A “no” message means that the change was abandoned. 
•  Press [MODE] to return to the first digit. 
 
Note: Due to certification requirements for the MeshGuard LEL IR, the maximum value you can set 
for Low Alarm is 60. If you set a value above 60 and try to save it, the MeshGuard LEL IR’s display 
shows “no” and it does not accept your change, plus it retains the current stored value.