Honeywell VA201T Calibration Handbook page 86

Calibration Handbook
The next screen allows you to specify the span calibration gas concentration value.
Use the Up or Down buttons to increase or decrease the value and press Enter to select.
The next screen requests confirmation; press Enter to confirm and the screen displays the following
message. (If there is no confirmation within 32 seconds, the calibration is automatically canceled
and display returns to the main menu option)
A success or failure message is displayed and the screen returns to the main menu option.
* Menu *
CO2 Set Span
Set Span Gas
2000
CO2 Set Span
YES
* Menu *
In Calib
CO2 Set Span
SUCCESS
86 IAQPoint