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If any damage or loose connection is detected, replace the corresponding part.
4.10.6 Negative Pressure Suction Inspection
4.10.6.1 Check the Tube Connections of Liquid Collection Bottle
1. Check if the tubes are correctly connected following the connection diagram printed on
the liquid collection bottle. If not, the overfill protection device cannot work normally.
2. Check if the tubes are inserted in place. If not, leakage may occur, resulting in failure to
reach negative pressure of 50 kPa.
4.10.6.2 Check the Negative Pressure
1. Read the reading on the Air pipeline pressure gauge on the front side of the anesthesia
machine and make sure that the pipeline supply gas pressure is within the normal
pressure range. (Only for the anesthesia machines without Venturi negative pressure
suction configuration.)
2. Set the swapping switch on the negative pressure regulator to REG position.
3. Set the switch of Venturi negative pressure generator to ON position. (Only for the
anesthesia machines without Venturi negative pressure suction configuration.)
4. Occlude the patient connection outlet of suction tube with hand.
5. Check if the reading on the negative pressure regulator is greater than 50 kPa. If it is less
than 50 kPa, check the following:
a. Increase the pressure at the rear end of negative pressure regulator clockwise.
b. Rotate counterclockwise to remove the muffler. Shake dust and foreign substance
from the muffler.
Sealing ring
Hose and connector
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