This regulator is used to inject calibration gases into the GASSYS2 or AFT15 chambers to create the secondary calibration points for a proper gas calibration of O2 and CO2 sensors.

• The initial case (for the primary calibration points) is the chamber flooded with ambient air (20.95% Oxygen, 0.04% Carbon Dioxide and balance Nitrogen).
• The secondary case (for the secondary calibration points) are using the GASCAL with GASREG to inject a calibrated gas mixture into the chamber.
• The chamber will be flooded with this mixture from GASCAL. GASCAL is a tank containing 4% carbon dioxide, 16% oxygen and balance (80%) nitrogen.

Use 3.2 mm ID tubing to run from GASREG output to the chamber and seal the 3.2 mm ID tube to the input port of the chamber, during calibration.

Wait for the chamber to be flooded, typically about 1-2 minutes.

Put regulator at 10 psi and open up the flow valve.

After flooding, then largely close the flow valve, but keep some small flow during the calibration of secondary point, to maintain positive pressure in the chamber.

The chamber needs to be flooded prior to attempting to calibrate for secondary points.

After secondary calibration, shut down the tank by closing the main valve.