Canbuilt OPT-5405, User Manual

Page: 22 / 32

BEAM SLOPE COMPENSATION
NOMINAL VERTICAL AIM FOR LOW BEAMS
The revised SAE J599 standard (8/97) requires low beam headlight aim to be adjusted
based on headlamp height from the ground. The NOMINAL VERTICAL AIM position on
low beam headlamps, as introduced in the new revision of the Standard SAE J599, "shall
be adjusted based on the headlamp mounting height, from the ground to the light source
center of the headlamp".
The TABLE 1 shows the VERTICAL BEAM AIM GUIDELINES as required in the
standard. These apply only for low beam.
The states that headlights centered 36”- 48” from the ground must be aimed 2”
below the 0 line and headlights mounted 48”- 54” must be aimed 4” below the 0 line.
Inspection tolerance is plus or minus 4”.
TABLE
7.6 m (25 ft)
H
Nominal
Vertical
Aim
Headlamp centerline
mounting height
H
Beam
Slope
Compensation
TABLE 1 - VERTICAL AIM GUIDELINES
Headlamp
(centerline) Aim Inspection Limits
mounting for Vertical Aim
height
22
to
36 in
0
4 in
UP to
4 in
DOWN
36
to
48 in 2 in
DOWN
2 in
UP to
6 in
DOWN
48
to
54 in 4 in
DOWN
0 in
UP to
8 in
DOWN
56 90 cm 100 mm 100mm
90 120 cm 50 mm 50 mm 150 mm
120 140 cm 100 mm 0 mm 200mm
Beam slope
compensation
(nominal
vertical aim)
Page 19 - Beam Slope Compensation - Nominal Vertical Aim
Canbuilt Mfg.
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