Electronic Operation; Overview; Figure 10-8: 300E Electronic Block Diagram - Teledyne 300E Instruction Manual

THEORY OF OPERATION

10.3. Electronic Operation

10.3.1. Overview

Figure 10-8 shows a block diagram of the major electronic components of the
Model 300E.
Analog Outputs
A1
A2
A3
Analog
Outputs
(D/A)
Power-Up
Circuit
Box
Temp
Thermistor
Interface
SAMPLE
TEMP
BENCH
TEMP
WHEEL
TEMP
164
Optional
Control Inputs:
4-20 mA
1 – 8
Status Outputs:
1 – 6
External
Digital I/O)
A/D
Converter
(V/F)
MOTHER
BOARD
Internal
Sensor Inputs
Digital I/O
C C
Sample
O O
Flow &
Pressure
M R
Sensors
E E
A F
S
Sensor
Status
&
Control
SYNC
DEMOD
Schmidt
Trigger

Figure 10-8: 300E Electronic Block Diagram

Model 300E Carbon Monoxide Analyzer
Back Panel
Connectors
COM-A COM-B
Optional
Ethernet
Interface
RS–232
or RS-485
RS – 232
PC 104 Bus
Zero/Span
2 Valve
I C
Bus Options
Keyboard &
Display
TEC Control
PHT
Photo-
Drive
detector
Detector
Output
GFC
Wheel
Optical
Bench
Segment Sensor
M / R Sensor
Instruction Manual
PC 104
CPU Card
Disk On
Chip
Flash Chip
PUMP
RELAY
BOARD
CPU Status
LED
IR
Source
GFC
Motor
Wheel
Heater
Bench Heater
P/N 04288 Rev: A