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Page 7
User Guide
Model 4200 Dust & Opacity Monitor
Transmissometer measurement mode (Shutters optional)
Fig. 4-1
1
Transmissometer Unit
2
Retroreflector Unit
3
Fail-safe Shutter Unit
4 Beamsplitter
5
Detector (Measurement)
6
Detector (Reference)
7
Collomating Lens
8
Span Calibration Filter
9
Zero Point Reflector
10 Reflector
11 LED 1
12 LED 2
13 Mirror