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IAQPoint Calibration Procedure
Setting the Sensor Zero
This option allows users to calibrate the sensor Zero.
Never calibrate the sensor Zero with ambient air. Always use Nitrogen (N2). Make sure to release the
gas to the sensor for at least 10 minutes before beginning and continue throughout.
Before starting the calibration (using the programming menus), connect the regulator to the gas
cylinder.
Adjust the flow rate to 0.1 L/min.
Open the rubber cap on the IAQPoint calibration port and connect the tubing from the regulator to
the sensor, as shown.
Let the gas flow for at least 10 minutes before starting the calibration.
Scroll to the CO2 Set Zero screen and press Enter to select.
The next screen requests confirmation; Use the Up or Down buttons to display YES and press Enter
to confirm. (If there is no confirmation within 32 seconds, the calibration is automatically canceled
and display returns to the main menu option.)
A confirmation screen is briefly displayed and the zero calibration begins.
A success or failure message is displayed and the screen returns to the main menu option.
Calibrating the CO
This option allows users to calibrate the sensor's span.
Note:
When calibrating a duct mounted unit, the unit must be removed from its base to ensure proper calibration.
Before starting the calibration (using the programming menus), connect the regulator to the gas
cylinder.
Adjust the flow rate to 0.1 L/min.(for the 2000 ppm range)
Connect the tubing from the regulator to the sensor, as shown in the image at left.
Start exposing the sensor to the calibration gas at least 10 minutes before starting and throughout the
calibration process.
Let the gas flow for at least 10 minutes before starting the calibration.
Scroll to the "CO2 Set Span" main menu option and press Enter to select.
IAQPoint
* Menu *
CO2 Set Zero
CO2 Set Zero
* Menu *
In Calib
CO2 Set Zero
SUCCESS
Sensor
2
Calibration Handbook
YES
85
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