4
5
Deadband
Press knob and turn to set the dead-band (hysteresis) ppm, press again to
confirm the setting.
EXAMPLE: When using CO
2
increase mode, if the set-point is 1000 ppm and
the dead-band is 50 ppm, the CO
2
output will activate at or below 1000 and
deactivate at 1050 ppm. For CO
2
decrease mode, the fan will activate at or
above 1000 ppm and turn off at 950 ppm.
CO
2
Mode
PPM Up: Increase the CO
2
ppm if using a CO
2
generator or CO
2
regulator
and compressed CO
2
tank.
Fuzzy Logic: If using CO
2
regulator and compressed CO
2
tank. This
mode applies fuzzy logic control to the CO
2
output. NOT for use with CO
2
generators.
PPM Down: Will decrease the CO
2
ppm by using an exhaust fan.
Min/Max Recall: Click both knobs to display the CO
2
min/max ppm record.
This shows the lowest ppm and highest ppm levels for a 24 hour period. The
screen will return to normal display after 5 seconds or by a pressing both
knobs, and the record will be reset.
Calibration: Place the CO
2
sensor outdoors in an area free from people,
vehicles, animals, other CO
2
generating objects and press both knobs for 3
seconds. The display screen will read CAL/400. Keep the sensor from direct
sunlight and any breathing. Allow it 10 minutes to stabilize the ppm reading.
The screen will return to normal display once the calibration is complete.
Calibration should be performed approximately every 3 years.
Output
LED will be on when output is active.
CO
2
Disable
This function gives you the ability to coordinate the CO
2
controller with an
independent temperature controller. What this allows you to do, is avoid
having your controller enrich your room with CO
2
while your exhaust fan is
running. To utilize this feature, you simply plug the included power adapter
into your temperature controller. Whenever your temperature controller
activates, it will override the CO
2
controller enrichment mode.
