Teledyne gfc 7000ta operation manual CPU Card, Sensor, Sync, Demod, Optical Bench

Theory of Operation Model GFC7000TA Carbon Dioxide Analyzer

A1	Analog Outputs	RS232
	Analog In
		Male
A2	Optional
	4-20 mA

COM2	USB COM	Ethernet
Female	port

A3	Control Inputs:
	1 – 8
A4	Status Outputs:
	1 – 6
	(I2C Bus)
Analog	External
Outputs	Digital I/O)
(D/A)	A/D
	Converter
	(V/F)

Power-Up

Circuit

MOTHER

BOARD

Box

Temp

Thermistor	Internal		I2C
Interface	Digital I/O	Sensor Inputs	Bus

2 RS–485)	USB)
COM (RS–232or	or

PC 104 Bus

Zero/Span

Valve

Options

Touchscreen

Display USB

LVDS

transmitter board

PC 104

CPU Card

Disk On

Module

Flash Chip

PUMP

SAMPLE

TEMP

BENCH TEMP

&Control	CO2	CO2
			Optional
	M	R
	E	E	O2 Sensor
	A	F
Status	S

Sample Flow	RELAY
& Pressure	BOARD
Sensors	CPU Status
	LED

WHEEL

TEMP

O2 SENSOR

TEMP

(optional)

Sensor

SYNC

DEMOD

Schmidt

Trigger

TEC Control
PHT	Photo-
Drive
	detector

Detector

Output GFC

Wheel

Optical

Bench

Segment Sensor

M / R Sensor

IR

Source

GFC

Motor

Wheel

Heater

Bench Heater

Figure 9-9: GFC 7000TA Electronic Block Diagram

Teledyne Analytical Instruments 198