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5-19

5.13.4 Ventilator-Related Alarm Tests

5.13.4.1 Setup

1. Ensure that the gas pressure for O2, N2O, and air is within the specified range.

2. Perform the power-on tests according to the instructions on the screen. Ensure that the tests

succeed.

3. Attach a breathing circuit and a manual bag.

NOTE

 For testing purposes, always use a reusable breathing circuit.

4. Attach an adult test lung to the Y-piece of the breathing circuit.

5. Set the O2 flow to 2 L/min and disable the N2O and air flows.

6. Set breathing parameters.

Parameter Setting

Patient Size Adult

Ventilation Mode VCV

Vt 600

Rate 8

I:E 1:2

Tpause 10

PEEP Off

Plimit 50

7. Start ventilation.

5.13.4.2 FiO2 Too Low Alarm Test

1. Set the FiO2 low alarm limit to 50%.

2. Set the air flow to 5 L/min.

3. Disable the O2 flow.

4. Verify that the following FiO2 low alarm signals activate within three ventilation cycles:

 The FiO2 Too Low message appears on the screen.

 An alarm tone sounds.

5. Set the FiO2 low alarm limit to 18%.

6. Verify that the alarm signals cease.

5.13.4.3 FiO2 Too High Alarm Test

1. Set the FiO2 high alarm limit to 50%.

2. Set the O2 flow control valve to 5 L/min.

3. Disable the air flow.

Mindray A9 Service Manual

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