Dräger Medical Babytherm 8004, Техническая документация инструкция

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Function Description Babytherm 8004/8010
Selection logics of test signals
An addressing module and a shift register convert the serial test signals into
parallel data.
The test signals activate the skin-temperature test circuit (36 °C).
Amplifier of skin-temperature measurement
Two skin-temperature hybrides measure the skin temperature.
Test circuit (36.0 °C skin temperature)
The software checks the skin-temperature hybrides.
The test circuits are provided with reference resistors. They are located at the
inputs of the skin-temperature hybrides. The output voltage values of the
skin-temperature hybrides correspond to a temperature of 36.0 °C.
A/D conversion with multiplexer
The multiplexer transmits the analog measuring signals of the skin tempera-
ture to the integrated A/D converter. The serial output signal of the A/D con-
verter is applied to an optocoupler.
1.3 Front
The front comprises the following subassemblies:
– WT LED 8004 PCB
– Membrane keypad 8004
– Text display
– WT Front PCB
– Loudspeaker