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2.5 Optical Alignment
The fiber optic lens is aligned at the factory to look straight down the nozzle’s bore. The alignment should be
visually checked prior to using the instrument. This alignment check is only possible when there is light inside the
reactor vessel, either with the vessel opened and lighted prior to operation, or from the light from the reaction after
startup.
To view the optical path:
1.
Unscrew the lens cover quick disconnect and remove the lens top cover as shown in Figure 10. Be
careful not to allow the weight of the cover to damage the fiber optic cable.
2.
Open the isolation valve.
3.
Sight down the Alignment Tube, through the process window and into the reaction chamber.
The light from the reaction vessel should appear centered in
the Alignment Tube. If it is not, the Alignment Tube should
be aligned as follows:
4.
Loosen the three alignment clamp screws using a
9/64” hex wrench (Figure 11).
5.
Manually adjust alignment tube until light is
centered.
6.
Tighten the three alignment clamp screws.
7.
Re-check the alignment to make sure the alignment
tube did not move while tightening the clamp
screws.
8.
Replace the Lens Top Cover, making sure that the
Lens Body is inserted into the Alignment Tube, and
tighten the Lens Cover Quick Disconnect.
Lens Top Cover
Lens Body
Alignment Tube
Figure 10
Lens Cover Quick Disconnect
Alignment
Clamp
Screws (3)
Figure 11
Alignment
Tube
