Second reference pressure measurement

Next sequence is run if all of following conditions set

Condition 1, 2, 3 and 4

1. FTP when 4 seconds after reference pressure measurement

-1 kPa (-7.5 mmHg) or less

2. Reference pressure

-4.85 to -1.057 kPa (-36.4 to -7.92 mmHg)

3. Reference pressure

Saturated within 60 seconds

4. Reference pressure difference between first and second

0.7 kPa (5.25 mmHg) or less

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