PureAire Monitoring Systems, Inc.
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To adjust the baseline setting, expose the monitor to ambient air, either outside or in a well-ventilated
room for about 5 minutes.
OR
expose the sensor to a span gas cylinder with a certified concentration
of CO
2.
Push the joystick up to increase the CO
2
reading, or push the joystick down to decrease the
CO
2
reading displayed on the second line of the digital display.
When done setting the calibration, push the joystick left once and the display will scroll:
6.1.2 Adjusting the CO
2
sensor manually to an exact 400PPM value
There is a provision in the software for a user to manually adjust the reading of CO
2
monitor to an
exact 400ppm value.
DO NOT ADJUST the CO
2
sensor unless you are certain that the CO
2
level
has returned to normal ambient conditions, such as in an outdoor environment or spaces that are
unoccupied. Be careful to not breath near the sensor because a person can exhale very high
concentrations, ( 30,000PPM ) of CO
2
To perform a manual adjustment of the CO
2
sensor to an exact 400PPM, use the following procedure.
Use the joystick to enter the password, then push the joystick to the right and navigate to the “Sensor
Adjustment” menu. The display will scroll
Push the joystick right once and the display will scroll:
Push the joystick down until the once and the display will display:
Push the joystick right once to display
…Set CO2 sensor span..
..Press ENTER to continue..
…Sensor adjustment..
…Set CO2 sensor span..
..Calibrate CO2 sensor to 400 PPM…
