What is the correct vacuum level required during vacuum drying, and how long must I evacuate the system?

Use a vacuum pump that attains 0.5 Torr (65 Pa) or lower after 5 minutes of operation. After the vacuum degree reaches 5 Torr (650 Pa), evacuate for an additional 1 hour, then verify that the vacuum degree has not risen by more than 1 Torr (130 Pa) after that hour. If 5 Torr (650 Pa) cannot be reached after 3 hours, water penetration or a leak is likely. (Page 12)