Teledyne 3300PA operating instructions Electronics, General, Signal Processing

Percent Oxygen Analyzer Operational Theory 2

2.3Electronics

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 sensor 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.

			Millivolt
			Potput
		TEM PERATU RE	SENSO R
M FC		CO M PENSATION
		NETW ORK ON	AM PLIFIER
Microamp		SENSO R PCB
Output
	I-22 Sensor

KEYBO ARD

A D C

M ICRO - CO NTRO L- LER

E –I CON V 4–20 m A dc

Concentration

0–10 V dc

D A C RAN GE ID

D IS P LAY	A LAR M S
RELAYS
RELAYS	A LAR M S

Figure 2-3: Block Diagram of the Signal Processing Electronics

Teledyne Analytical Instruments 2-5