2-6
2 Operational Theory
Model 3000MA
Teledyne Analytical Instruments
2.5
Electronics and Signal Processing
The Model 3000MAPercent Oxygen Analyzer uses an 8031 microcon-
troller with 32 kB of RAM and 128 kB of ROM to control all signal pro-
cessing, input/output, and display functions for the analyzer. System power
is supplied from a universal power supply module designed to be compatible
with any international power source. Figure 2-6 shows the location of the
power supply and the main electronic PC boards.
Figure 2-5: Location of Electronic Components
The signal processing electronics including the microprocessor, analog
to digital, and digital to analog converters are located on the motherboard at
the bottom of the case. The preamplifier board is mounted on top of the
motherboard as shown in the figure. These boards are accessible after re-
moving the back panel. Figure 2-7 is a block diagram of the Analyzer
electronics.
