Mindray A9 Service Manual

7-61
7.6.1.3 Pressure Sensor Test
When no pressure measurement device is available, check the pressure sensors in the following
way:
1) Directly connect the inspiratory port to the expiratory port with a breathing hose, or connect
the patient circuit to the inspiratory port, expiratory port, and leak test plug in the same way as
that in the leak test.
2) As shown in the following figure, ensure that Safety Valve is On and that Auto/Manual Valve
and VPM Auto/Manual Valve are Auto.
3) Set PEEP Valve Pressure to 10 cmH2O, 30 cmH2O, 60 cmH2O, and 100 cmH2O in turn.
4) Set Insp Valve Flow to 100 L/min and check the values of PEEP Pressure and PAW Sensor.
If the difference between PEEP Pressure on the left and PEEP Valve Pressure exceeds 5
cmH2O or 5%, whichever is greater, the PEEP sensor or PEEP valve needs to be calibrated or
replaced.
If PEEP Pressure is normal but the value of PAW Sensor is less than 20 cmH2O or 20%,
whichever is greater, the Paw sensor needs to be calibrated or replaced.
Select Setup > Service > Diagnostic Tests > Valves.

Mindray A9 Specifications

General

Type	Anesthesia Workstation
Integrated Gas Analysis	Yes
Backup Battery	Yes
Operating Temperature	10°C to 40°C
Storage Temperature	-20°C to 55°C
Battery Type	Lithium-ion
Ventilation Modes	Volume Control, Pressure Control, SIMV, Manual Ventilation
Display	Touchscreen
Patient Monitoring	ECG, SpO2, NIBP, EtCO2, Temperature
Connectivity	Ethernet, USB
Portability	Mobile (with wheels)
Battery Life	Minimum 90 minutes (typical)
Altitude	Up to 3000 meters
Power Supply	100-240 VAC, 50/60 Hz
Charging Time	Approximately 4 hours
Storage	Internal storage for patient data and system logs
Supported Languages	Multiple languages
Certifications	CE, FDA