Mindray A7 Service Manual

A7™ Service Manual 046-006272-00 4 - 27
Calibration System Calibration
[00 00 00 40] is
displayed.
Measurement range error occurs to the
inspiratory flow sensor.
1. Check if the sampling line is
properly connected.
2. Diagnose by using the valve
diagnotic tools: keep the pneumatic
connection environment for
calibraiton. Access the valve
diagnostic tools. Occlude the
expiration valve with 4000DA. Open
the inspiraiton valve from small
values to bigger values. Observe the
measured value of the calibration
device under different valve
opening DA. If the inspiratory flow
sensor sampling AD corresponding
to the point of measured value of
calibration device close to (less than
90) 90 L/min is greater than 3900,
the measurement range of
inspiratory flow sensor has an error.
In this case, replace the inspiratory
flow sensor ?
3. Replace the board.
[00 00 00 80] is
displayed.
Measurement range error occurs to the
expiratory flow sensor.
1. Check if the sampling line is
properly connected.
2. Diagnose by using the valve
diagnotic tools: keep the pneumatic
connection environment for
calibraiton. Access the valve
diagnostic tools. Occlude the
expiration valve with 4000DA. Open
the inspiration valve from small
values to bigger values. Observe the
measured value of the calibration
device under different valve
opening DA. If the inspiratory flow
sensor sampling AD corresponding
to the point of measured value of
calibration device close to (less than
90) 90 L/min is greater than 3900,
the measurement range of
expiratory flow sensor has an error.
In this case, replace the expiratory
flow sensor.
3. Replace the board.
Failure description Possible cause Recommended action

Mindray A7 Specifications

General

Brand	Mindray
Model	A7
Category	Medical Equipment
Language	English