Stephan Alia - Page 49

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4 Serial interface
© F. Stephan GmbH SA-112-0106V1.0-WEM-GB 49
EXTADC stands for the output values of the AD converter in the sensor
board.
DPa1 = Digital value of the patient pressure sensor
Flow = Digital value of the differential pressure in the flow
sensor
O2% = Digital value of the voltage in the oxygen sensor
TTank = Digital value of the resistance in the temperature
sensor of the humidifer chamber
TTube = Digital value of the resistance of the temperature sensor
near to the patient
Accu = Digital value of the voltage in the rechargeable battery
The register CTRLREG shows the status of the internal hardware
monitoring as digital signals.
15 = 15 V OK – voltage present
Ak = Battery OK
DC = 5 V supply from the power supply OK
OR = Position of the ON/OFF switch
- = not addressed
IV = Expiration valve OK
H2 = Tube heating OK
H1 = Water bath heating OK
The valve image stipulates which valve is ON or OFF.
Every valve combination possible during operation of the ventilator has
its own image.
VImage indicates which combination is currently active.
The individual valves and switches are listed in the register shown below:
EV1 EV2 = Expiration valve
OV = Calibration valve of the oxygen sensor
FV = Calibration valve of the offset value of the differential
pressure
AE = Battery switched on
H2 = Tube heating ON/OFF
EXTADC
CTRLREG
VImage