Document ID: chunk:federal_register_of_legislation:F2023C00162:body:0:p8
Version: federal_register_of_legislation:F2023C00162
Segment Type: other
Provision Reference: 
Character Range: 21050–23892

be on the same side of the "E" and face in the same direction. The use of Roman numerals as approval numbers should be avoided so as to prevent any confusion with other symbols.

       Annex 3

       PHOTOMETRIC MEASUREMENTS

       1. For measurements, the measuring screen shall be located at a distance of 10 m in front of the headlamp and perpendicular to a line joining the filament of the lamp and the point HV; the line H-H shall be horizontal. For lamps with transverse filament, the filament shall be as horizontal as possible during the measurements.

       2. Laterally, the headlamps shall be so aimed that the beam is as symmetrical as possible with reference to the line V-V.

       3. Vertically, the headlamp shall be so aimed that the illumination in point HV is 2 lx.

       Under those conditions, the cut-off shall be situated between the line H-H and the line H-100 mm.

       4. When aimed according to paragraphs 2 and 3 above, the illumination shall meet the following values:

       4.1. on the line H-H and above: 2 lx max.;

       4.2. on a line situated 300 mm below H-H and over a width of 900 mm in both sides of the vertical line V-V: not less than 8 lx;

       4.3. on a line situated 600 mm below the line H-H and over a width of 900 mm on both sides of the vertical line V-V: not less than 4 lx.

       Measuring screen

Annex 4

MINIMUM REQUIREMENTS FOR CONFORMITY OF PRODUCTION CONTROL PROCEDURES

1. GENERAL

       1.1. The conformity requirements shall be considered satisfied from a mechanical and geometric standpoint, if the differences do not exceed inevitable manufacturing deviations within the requirements of this Regulation.

       1.2. With respect to photometric performances, the conformity of mass-produced headlamps shall not be contested if, when testing photometric performances of any headlamp chosen at random and equipped with a standard filament lamp, no measured value deviates unfavourably by more than 20 % from the values prescribed in this Regulation.

       1.3. If the results of the tests described above do not meet the requirements, tests on the headlamp shall be repeated, using another standard filament lamp.

       1.4. Headlamps with apparent defects are disregarded.

       1.5. The chromaticity coordinates shall be complied with when the headlamp is equipped with a filament lamp set to Standard A colour temperature.

       The photometric performance of a headlamp emitting selective yellow light when equipped with a colourless filament lamp shall be the values contained in this Regulation multiplied by 0.84.

       2. MINIMUM REQUIREMENTS FOR VERIFICATION OF CONFORMITY BY THE MANUFACTURER

       For each type of headlamp the holder of the approval mark shall carry out at least the following tests, at appropriate intervals. The tests shall