Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:1:p34
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 1 (pt 34/35)
Character Range: 533891–537503

be permitted, provided that the impaired area does not exceed 15 per cent of the gridded surface.

       2.6.  Tests of the complete headlamp incorporating a lens of plastic material

       2.6.1.  Resistance to mechanical deterioration of the lens surface

       2.6.1.1.  Tests

       The lens of lamp sample No. 1 shall be subjected to the test described in paragraph 2.4.1. above.

       2.6.1.2.  Results

       After the test, the results of photometric measurements carried out on the headlamp in accordance with this Regulation shall not exceed by more than 30 per cent the maximum values prescribed at points B 50 L and HV and not be more than 10 per cent below the 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

      A. Tests on plastic materials (lenses or samples of material supplied pursuant to paragraph 2.2.4. of this Regulation).

Samples                                           Lenses or samples of material  Lenses
   Tests                                          1                              2       3  4  5  6  7  8  9  10  11  12  13
   1.1.  Limited photometry (A.6, para. 2.1.2.)                                                               X   X   X
   1.1.1. Temperature change (A.6, para. 2.1.1.)                                                              X   X   X
   1.1.2. Limited photometry (A.6, para. 2.1.2.)                                                              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 (A.6, para. 2.2.1.)   X                              X       X
   1.3.1. Transmission measurement                X                              X       X
   1.4.  Chemical agents (A.6, para.2.2.2.)       X                              X       X
   1.4.1. Diffusion measurement                   X                              X       X
   1.5.  Detergents (A.6, para. 2.3.1.)                                                     X  X  X
   1.6.  Hydrocarbons (A. 6, para. 2.3.2.)                                                  X  X  X
   1.6.1. Transmission measurement                                                          X  X  X
   1.7.  Deterioration (A.6, para. 2.4.1.)                                                           X  X  X
   1.7.1.