Mindray A9 Operating Instructions

Flow Control System Test Preoperative Tests
5 - 10 Operator’s Manual of Anesthesia System
3. Record the current pressure of the cylinder.
4. Close the valve of the N
2
O cylinder.
5. Record the cylinder pressure after one minute.
If the pressure reduction of the backup gas cylinder exceeds 0.5 MPa (72.5 psi), install a new
cylinder gasket. Repeat Steps 1 to 5. If the leak persists, stop using the backup gas cylinder
supply system.
5.8.4 High Pressure Leak Test of Air Cylinders
1. Set the system switch to the Off position and disconnect the air pipeline supply.
2. Open the valve of the air cylinder.
3. Record the current pressure of the cylinder.
4. Close the valve of the air cylinder.
5. Record the cylinder pressure after one minute.
If the pressure reduction of the backup gas cylinder exceeds 1.25 MPa (181.3 psi), install a new
cylinder gasket. Repeat Steps 1 to 5. If the leak persists, stop using the backup gas cylinder
supply system.
5.9 Flow Control System Test
WARNING: If N
2
O is available and flows through the system during this test, use a
safe and approved procedure to collect and remove N
2
O gas.
WARNING: Incorrect gas mixtures can cause patient injury. If the O
2
:N
2
O ratio
system does not supply O
2
and N
2
O in the correct proportions, do not
use the system.
CAUTION: Open the gas cylinder valve slowly to avoid damage to it. Do not rotate
the flow control knob hard. If a backup gas cylinder is not used after a
backup gas cylinder test, close its valve.
CAUTION: When the electronic flow control system is disabled, the backup flow
control system will be enabled. The initial flow of backup flow control
system is 1 L/min of O
2
. The BFCS display only has a total flowmeter.
CAUTION: Turn the flow control knob of the backup flow control system slowly.
To avoid damaging the control valves, do not turn further when the
flowmeter reading is out of range. When turning a flow control knob
clockwise to decrease flow, the flowmeter should reach 1 L/min before
the knob reaches its most clockwise mechanical stop (off) position.
Do not turn any further when the knob has reached the off position.
Turning a flow control knob counter clockwise increases flow.
The flow control system includes Electronic Flow Control System (hereinafter referred to as
EFCS) and Backup Flow Control System (hereinafter referred to as BFCS). Normally, EFCS is
used. Perform EFCS and BFCS tests before any case:
1. Connect the pipeline supplies or slowly open the cylinder valves.
2. Set the System switch to the ON position.
3. Select the soft key in Fresh Gas Flow display zone, and set the [Control Mode] on the pop-up
screen to [Direct Flow].
4. Set the Balance Gas to AIR.

Mindray A9 Specifications

General

Brand	Mindray
Model	A9
Category	Medical Equipment
Language	English