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Airfield Lighting
Safegate Group
Manual
Date: October 2016
Ref: SL-RE-E_SL-RT-E_SL-RN-E_SL-RTN-E_SL-SB-E
Version: 1.4
Page 25 of 42
2.7.4
Using the Sight Device
The Sight Device is used to ensure that a light fixture is installed correctly, with
respect to both levelling and azimuth angle.
2.7.4.1
Levelling the Light Fixture
The spirit level near the bottom of the Sight Device shows whether the light fixture
is levelled or not.
FIGURE 29
– THE SPIRIT LEVEL ON THE SIGHT DEVICE
2.7.4.2
Installing At the Correct Azimuth Angle
Before installation make sure that the toe-in setting on the Sight Device is correct, see
section
SIGHT DEVICE FOR BI-DIRECTIONAL LIGHT FIXTURE
and
2.7.2 Toe-in Adjustment Operation.
To install a light fixture at the correct azimuth angle, use the aiming telescope in one
of its four possible pre-set positions, and aim at a light fixture or other object in the
same row as the light fixture being installed, (e.g. the threshold, end or edge row). The
row can be either in line with or perpendicular to the light fixtures light beam
orientation.
Levelled
Needs adjustment