Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p50
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 135120–137822

values prescribed in this Regulation are met at HV (with a tolerance of + 0.2 1x) and related to that aiming at least one point of each area delimited on the measuring screen (at 25 m) by a circle 15 cm in radius around points B 50 L (or R) [1/] (with a tolerance of + 0.1 1x),75 R (or L), 25 R, 25 L, and in the entire area of zone IV which is not more than 22.5 cm above line 25 R and L;

       1.2.2.2. and if, for the driving beam, HV being situated within the isolux 0.75 E max, a tolerance of + 20% for maximum values and -20% for minimum values is observed for the phtometric value at any measuring point specified in paragraph 8.10. of this Regulation.

       1.2.3.  If the results of the tests described above do not meet the requirements, the alignment of the headlamp may be changed, provided that the axis of the beam is not displaced laterally by more than 1 degrees to the right or left. [10/]

       1.3.  With respect to the verification of the change in vertical position of the cut-off line under the influence of heat, the following procedure shall be applied:

       One of the sampled headlamps shall be tested according to the procedure described in paragraph 2.1, of annex 5 after being subjected three consecutive times to the cycle described in paragraph 2.2.2. of annex 5.

       The headlamps shall be considered as acceptable if delta r does not exceed 1.5 mrad.

       If this value exceeds 1.5 mrad but is not more than 2.0 mrad, a second headlamp shall    be subjected to the test after which the mean of the absolute values recorded on both samples shall not exceed 1.5 mrad.

       1.4.  The chromaticity coordinates shall be complied with.

       The photometric performance of a headlamp emitting selective yellow light shall be the values contained in this Regulation multiplied by 0.84.

       2.  MINIMUM REGULATION FOR VERIFICATION OF CONFORMITY BY THE MANUFACTURE

       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 be carried out in accordance with the provisions of this Regulation.

       If any sampling shows non-conformity with regarded to the type of test concerned, further samples shall be taken and tested. The manufacture shall taken steps to ensure  the conformity of the production concerned.

       2.1.  Nature of tests

       Tests of conformity in this Regulation shall cover the photometric characteristics and the verification of the change in vertical position of the cut-off line under the influence of heat.

       2.2.  Method used in tests

       2.2.1. Tests shall generally be carried out in accordance with the methods