Thermo Scientific 49i Instruction Manual page 228

System Description
Hardware
I/O Expansion
Board (Optional)
Fan
Solenoid Assembly
Sample Valve
Reference Valve
Ozone Scrubber
Photometer Lamp
Optical Bench with
Photometer Lamp
Detector System
Flow Transducers
Pressure Transducer
8-2 Model 49i Instruction Manual
Motherboard
Digital Output Board
Lamp Heater
Assembly
Figure 8-1. Hardware Components
The optical bench has two airtight chambers that contain the sample and
reference gases with a common photometer lamp at one end and two
individual detectors at the other end.
The photo-diode in each detector transmits light intensity information to
the measurement interface board for sample measurement computations.
Flow transducers monitor the flow of the sample and reference gases and
transmit the data to the measurement interface board.
The pressure transducer measures the pressure of the sample gas.
Ozonator
Ozonator Board
Photometer Board
Pressure Transducer
Optical Bench
Pump
Power Supply
Measurement
Interface Board
Flow Transducer B
Flow Transducer A
Detector Assembly A
Detector Assembly B
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