Mindray WATO EX-55Pro - EFCS Accuracy Test; N2 O Cylinder Supply Test; Air Cylinder Supply Test

4-7
4.5.2 N2O Cylinder Supply Test
1. Remove the N2O supply hose from the gas inlet assembly.
2. Mount the backup cylinder full of N2O on the backup cylinder yoke. If necessary, place
a new clean washer between the cylinder and cylinder yoke to minimize leakage caused
by yoke connections.
3. Keep the N2O cylinder open, before the cylinder pressure gauge displays the pressure of
the cylinder.
4. Turn off N2O cylinder.
5. Ensure that the pressure value displayed on the front panel N2O pressure gauge does not
decrease by less than 10% within one minute.
4.5.3 Air Cylinder Supply Test
1. Remove the Air supply hose from the gas inlet assembly.
2. Mount the backup cylinder full of Air on the backup cylinder yoke. If necessary, place a
new clean washer between the cylinder and cylinder yoke to minimize leakage caused
by yoke connections.
3. Keep the Air cylinder open, before the cylinder pressure gauge displays the pressure of
the cylinder.
4. Turn off Air cylinder.
5. Ensure that the pressure value displayed on the front panel Air pressure gauge does not
decrease by less than 10% within one minute.
4.6 EFCS Accuracy Test
Switch the system to the ACGO mode and connect the pipeline from the separate ACGO to the
test equipment (Alicat is recommended).
Verify the flow accuracy based on the following table.
Test Item Testing Method
Acceptance
Criterion (Flow
Value Displayed
on Alicat)
(Direct flow control mode)
Accuracy of the O2
electronic flowmeter
(Balance gas setting:
None)
Gas is set to O2 on
Alicat
Adjust the O2 flow knob to set the flow to
0.2 L/min.
0.2 ± 0.05 L/min
Adjust the O2 flow knob to set the flow to
1 L/min.
1.0±0.05 L/min
Adjust the O2 flow knob to set the flow to
3 L/min.
3.05±0.15 L/min
Adjust the O2 flow knob to set the flow to
15 L/min.
15.25±0.75 L/min
Accuracy of the air
electronic flowmeter
(Balance gas setting:
Air)
Gas is set to air on
Alicat
Adjust the air flow knob to set the flow to
15 L/min.
15.25±0.75 L/min
Adjust the air flow knob to set the flow to
3 L/min.
3.05±0.15 L/min
Adjust the air flow knob to set the flow to
1 L/min.
1.0±0.05 L/min
Adjust the air flow knob to set the flow to
0.2 L/min.
0.2 ± 0.05 L/min