Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p82
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 221597–224402

B50L (or R) and zone III, the maximum unfavourable deviation may be respectively:

       B50L (or R): 0.2lx equivalent 20%

          0.3lx equivalent 30%

       Zone III:  0.3lx equivalent 20%

          0.45lx equivalent 30%

       1.2.2. or if

       1.2.2.1. for the passing beam, the values prescribed in this Regulation are met at HV (with a tolerance of + 0.2lx) and related to that aiming at least one point of each area delimited on the measuring screen (at 25m) by a circle 15cm in radius around points B50L (or R) [1/] (with a tolerance of + 0.1lx ), 75R (or L), 50V, 25R, 25L, and in the entire area of zone IV which is not more than 22.5cm above line 25R and 25L;

       1.2.2.2.  and if, for the driving beam, HV being situated within the isolux 0.75 Emax, a tolerance of +20% for maximum values and -20% for minimum values is observed for the photometric  values  at  any  measuring  point  specified  in  paragraph  6.3.2.  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. [14/]

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

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

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

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

       If any sampling shows non-conformity with regard to the type