11
TARGETING, ALIGNING AND COMMISSIONING
THE REFLECTIVE BEAM DETECTOR
What is ‘targeting’ and ‘aligning’?
The refl ective beam detector will work only if
the beam of light hits the refl ector and returns to
the receiver. The best possible result is achieved
if the centre of the beam hits the centre of the
refl ector.
In order to achieve this result the beam detector
is adjusted in two stages called ‘targeting’ and
‘aligning’.
Panning and tilting
To carry out the targeting and aligning process
the refl ective beam detector is panned (moved
on its vertical axis) and tilted (moved on its hori-
zontal axis). Two thumbwheels are provided to
carry out these actions (Fig 8)
Successful target-
ing will result in the
centre of the beam
on full power hitting
the central part of
the reflector and
light being returned
to the receiver
Fig 6 Targeting
principle
or
tilt
thumbwheels
pan
Fig 8 Panning and tilting the detector
Fig 7 Aligning
principle
Correct aligning will
result in the centre of
the beam, with power
automatically adjusted,
hitting the dead centre
of the refl ector.
If the beam detector is
not correctly targeted
and aligned, problems
will occur.
