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Mindray A7 Service Manual

Mindray A7
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System Calibration Calibration
4 - 8 046-006272-00 A7â„¢ Service Manual
NOTE: If measurement deviations are not corrected after multiple flow sensor
calibrations, the user is recommended to replace the flow sensor and
then perform calibration. If the problem persists, factory maintenance
is necessary.
4.3.2 Flow Calibration (Service)
NOTE: Flow Calibration (Service) is necessary in case of replacing the
ventilator control board, drive gas assembly or solenoid valve
assembly.
NOTE: When a great deviation is detected between the measured value of the
built-in flow sensor and that of the standard flow measurement device,
you need to perform Flow Calibration (Service).
This calibration is intended for the flows sensors in the breathing circuit, ventilator flow sensor, and
also inspiratory valve. The standard flow measurement device is used to calibrate the flow sensors
and inspiratory valve.
4.3.2.1 Calibration Procedures
NOTE: Make sure that the tubes are not leaking when connected.
NOTE: Do not move or press the tubes during calibration.
NOTE: When connecting calibration tubes, make sure that gas flows in the
correct direction, which is from the inspiration connector of the
breathing system, through high flow inlet of the anesthesia machine
calibration device, anesthesia machine calibration device, high flow
outlet of the anesthesia machine calibration device, and to the
expiration connector of the breathing system.
NOTE: Before calibration, make sure that no sensor or valve related technical
alarms occurred.
NOTE: During calibration, make sure that the drive gas pressure is enough.
Failure to do so may lead to calibration failure.
NOTE: You can select VT Plus for auto calibration. You can also select flow
calibration device which satisfies the accuracy requirement for manual
calibration.
NOTE: For calibration device with high flow channel and low flow channel,
flow channel switch over is required during auto or manual calibration.
NOTE: Set the machine to work in EFCS mode for flow calibration.
4.3.2.2 Auto Calibration
Follow these steps to calibrate flow sensors.
1. Enter Standby.
2. Select Setup-> Service-> Calibration-> Flow Sensors to access the screen as shown.

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Mindray A7 Specifications

General IconGeneral
TypeAnesthesia Workstation
BrandMindray
ModelA7
Display15-inch color touchscreen
Oxygen FlushYes
Gas InletsO2, N2O, Air
Ventilation ModesSIMV, PSV
Breathing SystemIntegrated
Gas MonitoringO2, CO2, N2O
Monitoring ParametersFiO2
CO2 MonitoringMainstream or Sidestream
Power Supply100-240 V, 50/60 Hz

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