Tubes to the bubbling bottle, how to connect.

Fill the bubbling bottle with about 15 mL of clean water (about one third of the bottle), and close the cap tightly. Push the bubbling bottle into the bottle holder on the controller to secure it, and connect the PFA tube from the bubbling bottle to HUMIDITY CONT. 

New instruments have labels on the tubes, but older instruments don't. Follow the picture below for the installation.