Electronics And Signal Processing; Figure 2-7: 3000Rs-P Internal Electronic Component Location - Teledyne TEXIO PTE6-200 Operating Instructions Manual

Percent Oxygen Analyzer

2.4 Electronics and Signal Processing

The Model 3000RS-P Percent Oxygen Analyzer uses a microcon-
troller to control all signal processing, input/output, and display
functions for the analyzer.
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. The motherboard slides into the
plate assembly as shown in Figure 2-7. The rear panel board plugs into a
connector at the rear of the motherboard. An interface board is mounted
at the front of the plate assembly and accepts the connectors from the
sensor block, MEMEs sensor and auto calibration solenoid valves.
Figure 2-8 is a block diagram of the Analyzer electronics.
In the presence of oxygen, the cell generates a current. A current to
voltage amplifier converts this current to a voltage, which is amplified in
the second stage amplifier.
CELL HOLDER
MID PLANE PCB

Figure 2-7: 3000RS-P Internal Electronic Component Location

The second stage amplifier also supplies temperature compensation
for the oxygen sensor output. This amplifier circuit incorporates a ther-
Teledyne Analytical Instruments
MEMS FLOW SENSOR
AUTO CAL VALVES
Operational Theory
REAR PANEL PCB
MAIN PCB
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