Powering On the A7 Anesthesia System Operations
5 - 2 046-004667-00 A7™ Operating Instructions
WARNING: Before using the A7 Anesthesia System on the patient, ensure that the
system is correctly assembled and in good condition, and that all the
tests described in the Preoperative Tests are already completed. In case
of test failure, do not use the system. Have a qualified Mindray service
representative repair the system.
5.1 Powering On the A7 Anesthesia System
1. Connect the gas supplies and gas cylinders to the A7.
2. Connect the power cord to the AC power source. Check that the AC power LED illuminates.
3. Set the system switch to ON. Check that both the operating state LED and battery LED are
illuminated (the battery is being charged or fully charged).
4. The display shows the start-up screen.
5. The alarm LED flashes red, yellow, and cyan once in turn and then a beep sounds. This
verifies that audible and visual alarms are operational.
6. After several seconds, the system self-test screen displays and the A7 System self-test runs.
5.2 Powering Off the A7 Anesthesia System
The A7 System provides a powering off function with the following features:
• A prompt tone is heard when the user turns off the A7. If the system switch is turned off in
Standby mode, the A7 will immediately power off.
• If the system switch is turned off in Manual mode or in any of the Automatic ventilation
modes, the A7 waits 12 seconds to power off completely. In the 12-second power off delay
period, the screen displays a 10 second countdown timer. If the A7 is performing
Automatic ventilation, the ventilator continues ventilating the patient in the current
ventilation mode.
• A beep sounds for each second of the countdown from 10 to 1 second, after which a two-
second shutdown tone is heard when the timer reaches zero.
• The volume of power off delay sound can be adjusted in the System Alerts setting in the
Alarm Volume menu.
• When the user turns on the machine during the power off delay period, the countdown
timer disappears, and the ventilator resumes its previous state.
NOTE: The powering off delay function is not implemented when in the
Standby mode, only when actively ventilating.
FIGURE 5-1 Countdown timer screen
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