Venting from helium to atmosphere

• Open the helium gas bottle.
• Close V9i for safety.
• Loosen the locking nut on one viewport to allow it to pop open when at atmosphere.
• Press the Vent Over button and hold it until the chamber reached atmosphere. You hear when the viewport pops open. Release the button to stop the flow of helium.
• Remember to close the helium gas bottle at the end of the day.