3. Adjust the vacuum level from 0 to 560 mm Hg by turning the vacuum adjust knob
(clockwise to increase vacuum and counter-clockwise to decrease vacuum). Referring
to the vacuum gauge while setting the desired level of vacuum. To accurately read the
gauge, block the patient end of the hose or cap off the collection bottle and allow the
gauge to reach a stable vacuum reading.
Collection Bottle
Cap
Patient End of the Hose