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located on the Main PCB, which is mounted vertically, just behind the front panel of the control unit.
2.5.2 Signal Processing
Figure 2-3 is a block diagram of the signal processing electronics described below.
Figure 2-3: Signal Processing Block Diagram
In the presence of oxygen the sensor generates a millivolt potential which is fed to a voltage amplifier. The output from the sensor amplifier is sent to an analog to digital converter (ADC), and the resulting digital concentration signal is passed to the
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