4. Connectorinspection
•Turn tightly the negative pressure regulating valve clockwise, and block the air suction inlet with the
finger or the rubber head of dropper, or fold up and hold the suction tube;
•Start the aspirator for running with no strange sound; the pointer on the vacuum meter will quickly
reach up to the limit negative pressure. Release the suction inlet, the pointer will return below 0.02
Mpa. If so, the connector can be regarded as being in goodconnection.
•Attach the phlegm suction tube. The negative pressure in the negative pressure system shall be less than
0.06 Mpa at the time of attaching F6 suction tube, less than 0.04 Mpa when attaching F8 suction tube
and less than 0.03 Mpa when attaching F12 suction tube. If so, the phlegm aspirator is considered as
being in normal condition.
Note: Dredge the suction tube if blocked as per the following method: Bend the suction conductor in
“V” form (with no liquid in the holder), and release it to the original status when the negative
pressure reaches up to the maximum value. Repeat this procedure several times till the tube is not
blocked.
5. Negative pressure regulating
Block the suction inlet, open the aspirator switch and regulate the negative pressure valve, and the readings on the
pressure meter shall be within 0.02 Mpa ~ limit negative pressure.
•Control the negative pressure as required for suction by means of the negative pressure valve at the time of
clinicalpractice;
•Increase the negative pressure by turning the valve clockwise;
•Reduce the negative pressure below 0.02 Mpa prior to power shut-off.
3. Power lineconnection
Connect the plug with the power source. Turn on the power supply, and the power indicator will illuminate.
Note: The power plug is used for power shut-off, and the power socket shall be grounded reliably.
6. Inspection & test on the overflow device
•Open theholder plug;clean up the valve mouth, and leveling the rubber valve clack on the float.The valve
clack shall not be warped, bent and broken, but well connected with the float.The float shall be able to move
freely in its support without any blockage;
•Lift theholder plug with hand to make the float contact the water surface perpendicularly.Gradually lower
the holder cover to let the float rise;
•Tighten thehold plug, attach the suction tube conductor at the inlet, and screw firmly the regulating valve,
then, actuate the aspirator;
•Put the suction conductor into one clean water pail or attempt to simulate actual application to suction the
liquid into the holder of the overflow device.As aresult, the float will rise as the liquid level ascends until the
valve is closed and suction stops automatically.The final position of liquid level depends on the suction
process adopted;
•Release the regulating valve, set the aspirator switch off, open the holder plug and empty the liquid in the
holder.The float shall be at the bottom of the support and the valve is in open status in case of re-screwing
firmly the holdplug;
If so, the overflow device is considered as being in normal condition, which can be used for clinical practice.
