5-6
5.4.3 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.
3. Observe the reading on the AIR high pressure gauge for the entire system. Verify that the
difference between the pressure displayed on the AIR high pressure gauge and the pressure
displayed on the cylinder pressure gauge does not exceed 1.25 MPa(181 PSI).
4. In the EFCS state, set the balance gas to AIR and enable the direct flow control mode. Set
the ventilation mode to the manual mode.
5. Adjust the AIR flow gradually. The total flowmeter fluctuates along with the set EFCS flow.
6. Open the Backup AIR/O2 door in the BFCS state. Confirm the choice or wait 15 s for the
Backup flow to enable automatically. The Backup Flow Control is enabled alarm is
generated. The backlight of the total flowmeter is on. The system has about 1 L/min basal
flow. Adjust the AIR needle valve. The value on the total flowmeter fluctuates accordingly.
7. Turn off the AIR needle valve. Click Disable Backup Flow Control in the lower left corner
of the screen. Close the BFCS door to disable the BFCS. The backlight of the total
flowmeter is off after the BFCS door is closed. Enter the standby state and turn off the AIR
cylinder.
8. Verify that the pressure value displayed on the AIR high pressure gauge doesn't drop more
than 10% of its initial pressure over 1 minute.
9. Exit the standby state and set the AIR flow to 6 L/min.
10. Verify that the Air Supply Failure alarm occurs with the decrease of AIR pressure.
11. Verify that the AIR high pressure gauge decreases to zero.
5.5 EFCS Accuracy Test
1. Connect the calibrated flowmeter to ACGO port. Adjust the mechanical auto/manual switch
to Manual. Perform operations on the screen to switch the system to the manual mode. Set
ACGO to ON.
2. In the EFCS state, set the balance gas to none and enable the direct flow control mode.
3. Adjust the O2 flow knob to set the flow to 0.2 L/min, 1 L/min, 10 L/min, and 15 L/min.
Verify that the flow value displayed on calibrated flowmeter meets the acceptance criteria in
the table blow.
4. Set the balance gas to AIR. Adjust the AIR flow knob to set the flow to 1 L/min, turn off the
O2 flow meter.
5. Adjust the AIR flow knob to set the flow to 15 L/min, 10 L/min, 3 L/min, and 1 L/min.
Verify that the flow value displayed on flowmeter meets the acceptance criteria in the table
blow.
Test Item Test Method
Acceptance
Criterion
Direct flow control mode
Accuracy of the O2
electronic flowmeter
Adjust the O2 flow knob to set the flow to 0.2 L/min.
Adjust the O2 flow knob to set the flow to 1 L/min.
Adjust the O2 flow knob to set the flow to 10 L/min.
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