Page 9
Gerard Lighting Pty Ltd
96 - 112 Gow Street, Padstow, NSW 2211
Tel: 02 9794 930
www.gerardlighting.com.au
d.
Tighten the trunnion bracket mounting bolt to the required torque (by others) so that
floodlight will no longer rotate.
e.
The azimuth angle can be marked for future reference by marking a line in the cross
arm along the back and/or front of the trunnion bracket foot (without damaging
galvanising).
3.
To set the tilt angle (elevation):
a.
The tilt is adjusted using the front glass as a reference plane. Attach an accurate
inclinometer to indicate tilt of the glass according the lighting design. Avoid the
irregular edges of the modules. Note, when the glass is horizontal, the built-in protractor
will indicate zero.
b.
Tighten side bolts (19mm) so that the floodlight will no longer tilt (110 nm).
c.
Tighten the safety side screws (5mm Hex - 10 nm).
d.
The tilt angle can be marked for future reference by writing in the box provided on the
type label near the side bolt.
e.
Clip on the plastic bolt covers.
Note regarding the built-in protractor:
This actually indicates the angle of the glass with respect to the trunnion bracket, and not
necessarily the true horizontal. Its reading relies on the levelness of its mounting surface being
truly horizontal for the actual tilt of the floodlight to be correctly indicated. It is for this reason
that it is not recommended that the built-in protractor is used for accurate aiming. It is for
approximate aiming only.
Note regarding a lighting design with an asymmetric optic:
The lighting design will normally list the tilt angle of the floodlight with respect to the downward
vertical (nadir). Depending on the format of the photometric data used, the design can
present the tilt angle is one of two ways:
1.
The tilt of the glass, where a typical design would have tilts of 0-10 degrees (Fig. 2), or
2.
The tilt of the peak intensity (or similar reference direction), where a typical design would
have tilts of 60-70 degrees (Fig. 3).
The latter type is generally preferred as the aiming arrow (vector), and thus the aiming points
used by the design will correspond to where the peak intensity is directed. Where a reference
direction angle is used, it is necessary know the difference between this angle and the nadir
(B°, see Fig 3). This should be noted in the design schedules, and it can be different for each
beam type, e.g. NB/60
°
.
d.
Tighten the trunnion bracket mounting bolt to the required torque (by others) so that
floodlight will no longer rotate.
e.
The azimuth angle can be marked for future reference by marking a line in the cross
arm along the back and/or front of the trunnion bracket foot (without damaging
galvanising).
3.
To set the tilt angle (elevation):
a.
The tilt is adjusted using the front glass as a reference plane. Attach an accurate
inclinometer to indicate tilt of the glass according the lighting design. Avoid the
irregular edges of the modules. Note, when the glass is horizontal, the built-in protractor
will indicate zero.
b.
Tighten side bolts (19mm) so that the floodlight will no longer tilt (110 nm).
c.
Tighten the safety side screws (5mm Hex - 10 nm).
d.
The tilt angle can be marked for future reference by writing in the box provided on the
type label near the side bolt.
e.
Clip on the plastic bolt covers.
Note regarding the built-in protractor:
This actually indicates the angle of the glass with respect to the trunnion bracket, and not
necessarily the true horizontal. Its reading relies on the levelness of its mounting surface being
truly horizontal for the actual tilt of the floodlight to be correctly indicated. It is for this reason
that it is not recommended that the built-in protractor is used for accurate aiming. It is for
approximate aiming only.
Note regarding a lighting design with an asymmetric optic:
The lighting design will normally list the tilt angle of the floodlight with respect to the downward
vertical (nadir). Depending on the format of the photometric data used, the design can
present the tilt angle is one of two ways:
1.
The tilt of the glass, where a typical design would have tilts of 0-10 degrees (Fig. 2), or
2.
The tilt of the peak intensity (or similar reference direction), where a typical design would
have tilts of 60-70 degrees (Fig. 3).
The latter type is generally preferred as the aiming arrow (vector), and thus the aiming points
used by the design will correspond to where the peak intensity is directed. Where a reference
direction angle is used, it is necessary know the difference between this angle and the nadir
(B°, see Fig 3). This should be noted in the design schedules, and it can be different for each
beam type, e.g. NB/60
°
.
