Mindray WATO EX-55Pro, Service Manual

Page: 312 / 474

8-58
Failure
Description
Possible Cause Recommended Action
The pressure sampling line of the flow
sensor is leaked.
After checking, repair the pressure
sampling line of the flow sensor
according to section
8.4.4.1
Leakage Test on the Sampling
Line of the Flow Sensor
.
8.4.4.1 Leakage Test on the Sampling Line of the Flow Sensor
If an irregular flow waveform is displayed, the pressure sampling line of the flow sensor may be
leaked. Use the following tools to perform the leakage test:
 One anesthesia machine calibration device
 One test fixture of the pressure sampling line of the flow sensor
 One test fixture of the circuit transit adapter
 One syringe
 Three Φ 6 silicon tubes
 One Y-shape tube
Test procedures:
I. Leakage test on the pressure sampling line of the flow sensor (covering four sampling lines of
the expiration flow sensor and inspiration flow sensor)
1. Disable the system switch.
2. Install the breathing circuit properly.
3. Remove the flow sensor assembly.
4. Install the test fixture of the flow sensor tributary on the installation position of the flow
sensor assembly on the patient circuit. Rotate the breathing interface knob securely.
5. Connect the pressure sensor interface (positive pressure end) of the anaesthesia machine
calibration apparatus, syringe (pull out the pushrod to a certain position before
installation), and the test fixture of the flow sensor tributary to the Silicon hose (6x300)
using the Y-shape tube.