Fabius
®
Function Description
2-46
Copyright 2000 Draeger Medical, Inc.
sec2_funcdescrip_b.fm
10.2 Control PCB
The Control PCB measures and monitors all measuring and status signals. If an error
occurs, the Control PCB switches off the solenoids, and activates the buzzer. The
Control PCB is then reset.
The Control PCB is equipped with the pressure sensors for the airway pressure (Paw)
and the flow (
∆P).
The Control PCB comprises the following components:
− microcontroller
− quartz oscillator
− EPROM
− EEPROM
− RAM
− latch
− 9 V rechargeable battery or Goldcap capacitor
The Control PCB provides the following functions:
− measurement of oxygen concentration, flow, and pressure
− voltage monitoring and power-on
− LED control
− 2-min silence timer
− buzzer and buzzer control
− contrast control
− membrane keypad scanning
− control knob scanning
− motor current monitoring
− membrane pressure
− charging voltage monitoring
− display control
− ±12 V generation
Rev. A
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