Agilent Technologies TwisTorr 305 FS Notice De Mode D'emploi page 243

Technical Information 8
Vent Accessories
This vent valve waits before opening a minimum time of about 5 sec.
This time can be increased up to about 220 min. by means of a setting of the controller
software (optional).
To install the vent valve, unscrew the threaded plug (see figure below).
Figure 38
TwisTorr 305 FS User Manual / 87-901-057-01 (A.00) 243/258