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3. Select Setup > Service > Diagnostic Tests> Valves to access the flow test screen.
4. Set Safety Valve to On.
5. Set PEEP Valve Pressure to 50 cmH2O, and Auto/Manual Valve to Auto.
6. Set Insp Valve Flow to the following values: 3L/min, 10L/min, 20L/min, 30L/min, and
60L/min.
7. Check the values displayed on the inspiratory flow sensor and expiratory flow sensor. The
deviations between these values and the measured values of the flow sensors on the
anesthesia machineshould not exceed 1 L/min or 5% of the measured values of the flow
sensors on the anesthesia machine, whichever is greater.
8. Set flow to 0 and reinstall the water collection cup.
5.17 Constant Flow Test (Checking the Pressure Sensor
Accuracy)
Generally, measurement deviations seldom occur on pressure sensors. However, in
case that the monitoring signal test board, solenoid valve assembly, or expiratory
valve assembly needs to be replaced, you must perform pressure calibration and
check the pressure sensor accuracy to confirm the effectiveness of calibration.
You can use any flowmeter with the accuracy of at least ±2% for the accuracy
measurement of the pressure sensors.
To check the measurement accuracy of pressure sensors, perform the following operations:
1. Make the machine enter the standby mode, remove the patient circuit, and mount the
pressure calibration test fixture to the circuit adapter block in place.
2. Connect the syringe and the pressure sampling port of the pressure test equipment by using a
three-way silicon tube.
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