Ventilator Control and Drive Theory of Operation
1 - 12 0070-10-0683 AS3000™ Service Manual
1.5 Ventilator Control and Drive
1.5.1 BDU (Basic Digital Unit)
The BDU serves as the active ventilator control. The BDU controls the actions of the PEEP,
calibration, and proportional valves, and reads the signal flow, and pressure sensors and
valves
FIGURE 1-6 BDU Control Board, Top View
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