Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p61
Version: federal_register_of_legislation:F2023C00228
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Character Range: 163489–167144

minimum values prescribed at point 75 R (in the case of headlamps intended for left- hand traffic, the points to be considered are B 50 R, HV and 75 L).

       2.6.2. Test of adherence of coatings, if any

       The lens of lamp sample No. 2 shall be subjected to the test described in paragraph 2.5. above.

       3. VERIFICATION OF THE CONFORMITY OF PRODUCTION

       3.1. With regard to the materials used for the manufacture of lenses, the lamps of a series shall be recognized as complying with this Regulation if:

       3.1.1. After the test for resistance to chemical agents and the test for resistance to detergents and  hydrocarbons,  the  outer  face  of  the  samples  exhibits  no  cracks,  chipping  or deformation visible to the naked eye (see paras. 2.2.2., 2.3.1. and 2.3.2.);

       3.1.2. After the test described in paragraph 2.6.1.1., the photometric values at the points of measurement considered in paragraph 2.6.1.2. are within the limits prescribed for conformity of production by this Regulation.

       3.2. If the test results fail to satisfy the requirements, the tests shall be repeated on another sample of headlamps selected at random.

Annex 6 ‑ Appendix 1

CHRONOLOGICAL ORDER OF APPROVAL TESTS

        1. Tests on plastic materials (lenses or samples of material supplied pursuant to paragraph 3.2.4. of this Regulation)

                                             Lenses or samples  Lenses
                                             of material
Tests                                        1                  2       3  4  5  6  7  8  9  10  11  12  13
1. 1. Limited photometry (para. 2.1.2.)                                                      X   X   X
1. 1. 1. Temperature change (para. 2. 1. L)                                                  X   X   X
1. 1.2. Limited photometry (para. 2.1.1)                                                     X   X   X
1.2. 1. Transmission measurement             X                  X       X  X  X  X  X  X  X
1.2.2. Diffusion measurement                 X                  X       X           X  X  X
1.3. Atmospheric agents (para. 2.2.l.)       X                  X       X
1. 3. 1. Transmission measurement            X                  X       X
1.4. Chemicals agents (para. 2.2.2)          X                  X       X
1.4. 1. Diffusion measurement                X                  X       X
1.5. Detergents (para. 2.3. 1 )                                            X  X  X
1.6. Hydrocarbons (para. 2.3.2)                                            X  X  X
1.6. 1. Transmission measurement                                           X  X  X
1.7. Deterioration (para. 2.4.l.)
1.7.1. Transmission measurement                                                     X  X  X
1.7.2. Diffusion measurement                                                        X  X  X
1.8. Adherence (para. 2.5)                                                          X  X  X              X

       B.                             Tests on complete lamps (supplied pursuant to paragraph 3.2.3 of this Regulation)

                                     Complete lamp
Tests                                Sample No.
                                     1              2
2. 1. Deterioration (para. 2.6. 1.1  X
2.2. Photometry (para. 2.6.1.2)      X
2.3. Adherence (para. 2.6.2)         X              X

Annex 6 - Appendix 2

METHOD OF MEASUREMENT OF THE DIFFUSION AND TRANSMISSION OF LIGHT

       1. EQUIPMENT (see figure)

       The beam of a collimator K with a half divergence beta/2 = 17.4 x 10-4 rd is limited by

       a diaphragm DT with an opening of 6 nun against which