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Trace Oxygen Analyzer Operational Theory 2
Teledyne Analytical Instruments
Figure 2-2. Characteristic Input/Output Curve for a Micro-Fuel Cell
2.3 Electronics
2.3.1 General
The signal processing uses an Intel microcontroller with on-board
RAM and ROM to control all signal processing, input/output, and display
functions for the analyzer. System power is supplied from a universal
power supply module designed to be compatible with most international
power sources.
The power supply circuitry is on the Power Supply PCB, which is
mounted vertically, just behind the rear panel of the Control Unit.
The signal processing electronics including the temperature compen-
sated amplifier, microcontroller, analog to digital, and digital to analog
converters are located on the Main PCB, which is mounted vertically, just
behind the front panel of the Control Unit.
2.3.2 Signal Processing
Figure 2-3 is a block diagram of the signal processing electronics
described below.