Chapter 4 – Installation
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Most of the targets are rectangular. Most of the installations for
the photocell result in a beam that hits the propeller in an arc. It
is possible that the beam might “cut” the target at something less
than its length. This is truer of placements close to the center of
rotation than farther away. Keep in mind the pitch of the
propeller can change too, causing loss of signal on the target.
4.4.2.3
Repair of Photocell Wiring.
The photocell is used in the sourcing mode. The wire color codes
are shown in the table below.
4.4.2.4
Photocell Placement
When mounting the photocell system, the user must take care in
positioning the photocell probe. The two lenses of the photocell
probe work best when
They are tangent to the arc created by the retro-reflective
target (see Section 4.4.2.4 Photocell Placement).
The retro-reflective target is aligned tangent to the arc
created by the radius where it is attached.
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