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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
4.2 Instrument Description
4.2.1 Sensor Module, Reaction Cell, Detector
The sensor module (Figure 10-6) is where the fluorescence light is generated and detected. It is
the most complicated and critical sub-assembly in the entire analyzer. It consists of the following
assemblies and functions:
1. The reaction cell
2. Reaction cell heater/thermistor
3. PMT and HVPS (high voltage power supply)
4. PMT cooler/cold block/heatsink/fan
5. Preamp assembly:
A. Preamp range control hardware
B. HVPS control
C. PMT cooler temp control
6. Electric and optic test electronics
7. Light trap
8. UV lamp and UV detector
4.2.2 Pneumatic Sensor Board
The pneumatic sensor board consists of two pressure sensors mounted on the flow control
module. One pressure sensor measures the upstream of the flow control module which is near
ambient pressure. The second pressure sensor measures reaction cell’s pressure which is about
one-quarter of ambient pressure. From these two pressure the sample flow rate can be computed
and is displayed as sample flow in the test menu including two pressure readings. The M100AH
displays pressure in inches of mercury-absolute (in-Hg-A) and flow in cc/min.
4.2.3 Computer Hardware and Software
The M100AH Analyzer is operated by a micro computer. The computer's multitasking operating
system allows it to do instrument control, monitor test points, provide analog output and provide
a user interface via the display, keyboard and RS-232 port. These operations appear to be
happening simultaneously but are actually done sequentially based on a priority queuing system
maintained by the operating system. The jobs are queued for execution only when needed,
therefore the system is very efficient with computer resources.
4-3