CO2 calibration work is easier to control when the gas path is guided directly to the instrument. This accessory connects the IAQ monitor with a nitrogen cylinder for CO2 calibration, supporting the 0 ppm calibration procedure described for the HD21ABE17.
The accessory slides onto the top of the instrument, with the T/RH probe passing through the central hole. The tube from the nitrogen cylinder connects to the CO2 input of the accessory, helping service personnel carry out the calibration with the correct setup.
For the documented CO2 zero calibration procedure, the nitrogen cylinder flow meter is adjusted to a constant flow from 0.3 to 0.5 l/min. The connecting tube is included, reducing the need to source the essential connection separately.
The accessory creates the connection between the IAQ instrument and a nitrogen cylinder for CO2 calibration.
The accessory is positioned on the top of the instrument, with the T/RH probe passing through the central hole.
The tube from the nitrogen cylinder connects to the CO2 input of the accessory during calibration.
The accessory is used in the documented 0 ppm CO2 calibration process with nitrogen.
