5.0 Orientation and elevation settings
5.1 Introduction
In this chapter the orientation and elevation settings for an UEL light are described.
5.2 Standard levelling device
5.2.1 Introduction
This system is suited for ground mounted lights or pole mounted lights up to 2 meters. It consists of a support, which is
secured on the light unit, in the place of the optical cartridge, and which is equipped with a elevation angle setting device, a
sighting device (both with a graduated scale) and a spirit level.
The elevation angle setting device is graduated from 0 to 25°.
For the azimuthal setting, the system can be rotated around a vertical axis, and has 4 set positions that allow aiming at
reference points (generally other lights) in a direction parallel or perpendicular to the center line. The sighting device is
graduated from -4 to +4 ° to allow for toe-in angles. Two additional set positions at -15 and +15° permit the setting of RTILS
lights.
5.2.2 Procedure
The following table instructs you on how to work with the device:
1. Assemble the system.
2. Remove the optical cartridge and install the leveling device in its place.
Tighten the securing screw.
3. Set the elevation angle on the setting device and the azimuth (toe-in) angle on the sighting device.
Note
Refer to ICAO Annex 14 to know the correct elevation and toe-in angles in function of the light and its position.
4. Level the light approximately to allow the azimuth orientation of the light.
5. Set the light in the correct direction using the sighting device, aiming at the next or former light in the same alignment.
For lights in a barrette, a side row or a wing bar, aiming laterally at another light is possible. For this purpose release the
two locking levers, turn the system by 90° until a distinct click can be felt, and re-tighten the locking levers.
Note
If there is no light in the same alignment, use a reference pole.
6. Secure the bracing clamp of the light.
7. Use the spirit level to set the light at the correct elevation by unscrewing/ tightening slightly the two opposite screws.
Tighten the screws sufficiently to avoid any play, but do not overtighten them. Once this is done, secure the two counter-
nuts.
8. Remove the device. Put the optical cartridge back in place, without forgetting to connect the lamp.
5.2.3 Illustration
The drawing below illustrates the procedure described above:
UM-4020 / AM02-630e, Rev. 2.0, 2020/05/19
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