Chapter 3: Theory of Operation
1049766 Rev A
V60 Ventilator Service Manual
3-3
3.1.3
Air Flow Sensor
The
air flow sensor
measures a subset (bypass flow) of total flow in the
pneumatic air path and interpolates the measurements according to constants
that are calculated during gas delivery subsystem (GDS) calibration. The air
flow sensor also helps provide closed-loop control of gas flow during oxygen
blending.
3.1.4
Machine and Proximal Pressure Transducers
The
machine and proximal pressure transducers
on the DA PCBA measure the
machine and proximal pressure over a range of -20 to +65 cmH
2
O.
3.1.5
Barometric Pressure Transducer
The
barometric pressure transducer
on the DA PCBA measures barometric
pressure over a range of 525 to 850 mmHg.
3.1.6
Oxygen Pressure Transducer
The
oxygen pressure transducer
on the DA PCBA measures inlet pressure over
a range of 0 to 87 psig. An alarm results if oxygen supply pressure is below
40 psig (276 kPa) or above 92 psig (634 kPa).
Air flow sensor
Manifold
Oxygen pressure
transducer
Machine pressure
transducer
Proximal
pressure
transducer
Barometric
pressure
transducer
DA PCBA
