Electronic Operation; Overview; Figure 9-1. Electronic Block Diagram - Teledyne T750 User Manual

E O
9.4.
LECTRONIC
O
VERVIEW
Figure 9-1 shows an electronic block diagram of the portable calibrator.
TEST
CHANNEL
OUTPUT
MFC3
2nd Cal Gas
(Optional)
MFC2
Cal Gas
MFC1
(Diluent)
Diluent
Pressure Sensor
Cal Gas
Pressure Sensor
O Generator Input
3
Pressure Sensor
Photometer Sample Gas
Pressure Sensor
O Generator
3
UV Lamp
O Generator
3
Lamp Supply
Photometer
Detector
Preamp
Absorption tube
Photometer
Detector
Photometer
The core of the calibrator is a microcomputer (referred to as the CPU) that controls various
internal processes, interprets data, makes calculations, and reports results using specialized
firmware developed by Teledyne API. It communicates with the user as well as receives
data from and issues commands to a variety of peripheral devices via a separate printed
circuit assembly called the motherboard.
160
PERATION
ANALOG
OUT
2
(I C Bus)
Analog Outputs
Aout 4
Aout 3
Aout 2
Aout 1
Analog Outputs
(D/A)
Box
Temperature
Thermistor Interface
Photometer Photometer
Sample Gas UV Lamp
Temperature Temperature
O Generator UV Lamp
3
Temperature
Photometer
Lamp Power
Supply

Figure 9-1. Electronic Block Diagram

RS232 COM2
Male Female
Status Outputs
1 - 8
Control Outputs
1 - 12
Control Inputs
1 - 12
External Digital I/O
Power Up
Circuit
CPU
Status
LED
2
I C Bus
RELAY
PCA
2
I C
Status
LED
CAL GAS
INLET
DILUENT
Valve
USB
ETHERNET
port
Touchscreen
Display
PC 104
CPU Card
Disk on
Module
Flash
Chip
GPT Valve
(Optional)
O Generator
3
Valve
(Optional)
Photometer M/R
Valve
(Optional)
Photometer
Lamp Heater
O Generator
3
Lamp Heater
Photometer
Pump
083730750B DCN8606