2-8
2 Operational Theory Model Ultra Trace 3000
Teledyne Analytical Instruments
Figure 2-5 is the flow diagram for the sampling system. In the standard
instrument, calibration gases can be connected directly to the Sample In port
by teeing to the port with appropriate valves.
2.4 Electronics and Signal Processing
The Model Ultra Trace 3000 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.
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.
Figure 2-6: Electronic Component Location Inside the Model Ultra Trace 3000
Motherboard
Preamplifier
PCB
Front Panel
Display Board
Universal
Power Supply
Slide-out
Electronics
Drawer
Temperature
Controller
Board
TEC Power Supply