5.7.2 Sensor Mounting and Mechanical Alignment Verification
Verify that:
•
The emitter and receiver are directly opposite each
other
•
Nothing is interrupting the defined area
•
The defined area is the same distance from a
common reference plane for each sensor
•
The emitter and receiver are in the same plane and
are level/plumb and square to each other (vertical,
horizontal, or inclined at the same angle, and not
tilted front-to-back or side-to-side)
Figure 13. Incorrect Sensor Alignment
X
Y
Z
X
Y
Z
Level Surface
Emitter
Receiver
X
Level Surface
A
B
X
Angled or Horizontal Installations – verify that:
•
Distance X at the emitter and receiver are equal
•
Distance Y at the emitter and receiver are equal
•
Distance Z at the emitter and receiver are equal from
parallel surfaces
•
Vertical face (the window) is level/plumb
•
Defined area is square. Check diagonal
measurements if possible; see Vertical Installations,
on the right.
Vertical Installations – verify that:
•
Distance X at the emitter and receiver are equal
•
Both sensors are level/plumb (check both the side
and face)
•
Defined area is square. Check diagonal
measurements if possible (Diagonal A = Diagonal B).
S4B Safety Light Curtain
26
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