4
DESCRIPTION
1. Green LED - good
2. Yellow LED - normal
3. Red LED - warning
4. LCD display
5. Power button
6. Menu button
7. Set & Home button
8. Next button
9. High CO2 alarm LED
10. USB charging port
10, 11. Gas entry ports
LCD DISPLAY
1. CO2 concentration in ppm or % (> 9,999 ppm)
2. Air Temperature
3. % Relative Humidity
4. Battery Charge Level Indicator
Green/Yellow/Red LEDs
CO2 level indicator for indoor Air Quality (IAQ):
•
Green LED - CO2 is below 800 ppm
•
Yellow LED - CO2 between 800-1,200 ppm
•
Red LED - CO2 level is above 1,200 ppm