Document ID: chunk:federal_register_of_legislation:F2023C00142:reg:1:p5
Version: federal_register_of_legislation:F2023C00142
Segment Type: reg
Provision Reference: reg 1 (pt 5/12)
Character Range: 85392–88392

being subjected three consecutive times to the cycle described in paragraph 2.2.2. of annex 4.
         The headlamp shall be considered as acceptable if deltar (as defined in paragraphs 2.1. and 2.2. of annex 4 to this Regulation) 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 as specified in paragraph 6.1.6. of this Regulation shall be complied with.
         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 respect to the type of test concerned, further samples shall be taken and tested.  The manufacturer shall take 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. Methods used in tests
         2.2.1. Tests shall generally be carried out in accordance with the methods set out in this Regulation.
         2.2.2. In any test of conformity carried out by the manufacturer, equivalent methods may be used with the consent of the competent authority responsible for approval tests. The manufacturer is responsible for proving that the applied methods are equivalent to those laid down in this Regulation.
         2.2.3. The application of paragraphs 2.2.1. and 2.2.2. requires regular calibrations of test apparatus and its correlation with measurements made by a competent authority.
         2.2.4. In all cases the reference methods shall be those of this Regulation, particularly for the purpose of administrative verification and sampling.
         2.3. Nature of sampling
         Samples of headlamps shall be selected at random from the production of a uniform batch.  A uniform batch means a set of headlamps of the same type, defined according to the production methods of the manufacturer.
         The assessment shall in general cover series production from individual factories. However, a manufacturer may group together records concerning the same type from several factories, provided these operate under the same quality system and quality management.
         2.4. Measured and recorded photometric characteristics
         The sampled headlamps shall be subjected to photometric measurements at the points provided for in the Regulation, the reading being limited to points Emax, HV [2/], HL, HR [3/] in the case of the driving beam, and to points B 50 L (or R) [1/],