Thermo 48i - Page 7

Contents
Thermo Electron Corporation Model 48i Instruction Manual vii
Chapter 8 System Description.........................................................................8-1
Hardware ................................................................................8-2
Optical Bench ......................................................................8-3
Band-pass Filter ...................................................................8-3
Bench Heater Board.............................................................8-3
Chopper Motor....................................................................8-3
Optical Pickup.....................................................................8-4
Gas Filter Wheel ..................................................................8-4
Infrared Source ....................................................................8-4
Pre-amplifier Assembly with IR Detector .............................8-4
Sample Flow Sensor .............................................................8-4
Pressure Transducer .............................................................8-4
Capillary ..............................................................................8-4
Pump ...................................................................................8-4
Purge Flow Switch (optional)...............................................8-4
Software..................................................................................8-5
Instrument Control..............................................................8-5
Monitoring Signals...............................................................8-5
Output Communication......................................................8-5
Electronics ..............................................................................8-7
Motherboard........................................................................8-7
Measurement Interface Board ..............................................8-8
Flow Sensor Assembly..........................................................8-8
Pressure Sensor Assembly .....................................................8-8
Bench Heater Board.............................................................8-9
Pre-amp Board Assembly .....................................................8-9
Digital Output Board...........................................................8-9
I/O Expansion Board (Optional) .........................................8-9
Front Panel Connector Board ..............................................8-9
I/O Components ..................................................................8-10
Analog Voltage Outputs.....................................................8-10
Analog Current Outputs (Optional) ..................................8-10
Analog Voltage Inputs (Optional)......................................8-11
Digital Relay Outputs ........................................................8-11
Digital Inputs.....................................................................8-11
Serial Ports.........................................................................8-11
RS-232 Connection ...........................................................8-12
RS-485 Connection ...........................................................8-13
Ethernet Connection..........................................................8-13
External Accessory Connector ............................................8-13
Chapter 9 Optional Equipment ........................................................................9-1
Internal Zero/Span Assembly ..................................................9-1
Internal Zero Air Scrubber ......................................................9-1