Mindray A9 Service Manual

5-5
7. Reconnect the AIR pipeline supply.
5.4 Cylinder Supply Tests
5.4.1 N2O Cylinder Supply Test
1. Remove the N2O supply hose from the gas inlet assembly. Verify that O2 supply is
available.
2. Mount the backup cylinder full of N2O on the backup cylinder yoke.
3. Observe the reading on the N2O high pressure gauge for the entire system. Verify that the
difference between the pressure displayed on the N2O high pressure gauge and the pressure
displayed on the cylinder pressure gauge does not exceed 1 MPa (145 PSI).
4. In the EFCS state, set the balance gas to N2O and enable the direct flow control mode. Set
the ventilation mode to the manual mode.
5. Adjust the N2O flow to 6 L/min.
6. Set the N2O flow to 0. Turn off the N2O cylinder.
7. Verify that the pressure value displayed on the N2O high pressure gauge doesn't drop more
than 10% of its initial pressure over 1 minute.
8. Set the N2O flow to 6 L/min.
9. Verify that the N2O Supply Failure alarm occurs with the decrease of N2O pressure.
10. Verify that the N2O high pressure gauge decreases to zero.
5.4.2 O2 Cylinder Supply Test
1. Remove the O2 supply hose from the gas inlet assembly.
2. Mount the backup cylinder full of O2 on the backup cylinder yoke.
3. Observe the reading on the O2 high pressure gauge for the entire system. Verify that the
difference between the pressure displayed on the O2 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 None and enable the direct flow control mode. Set
the ventilation mode to the manual mode.
5. Adjust the O2 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 O2 needle valve. The value on the total flowmeter fluctuates accordingly.
7. Turn off the O2 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 O2
cylinder.
8. Verify that the pressure value displayed on the O2 high pressure gauge doesn't drop more
than 10% of its initial pressure over 1 minute.
9. Exit the standby state and set the O2 flow to 6 L/min.
10. Verify that the alarms of O2 Supply Failure and Drive Gas Pressure Low occur with the
decrease of O2 pressure.
11. Verify that the O2 high pressure gauge decreases to zero.

Mindray A9 Specifications

General

Brand	Mindray
Model	A9
Category	Medical Equipment
Language	English