Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p93
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 250581–253811

that the force of adhesion to the surface considered is balanced by a force perpendicular to that surface. At this stage, the tape shall be torn off at a constant speed of 1.5m/s +/- 0.2m/s.

       2.5.3. Results

       There shall be no appreciable impairment of the gridded area.  Impairments at the intersections between squares or at the edges of the cuts shall be permitted, provided that the impaired area does not exceed 15% 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% the maximum   values prescribed at points B50L and HV and not be more than 10% below the minimum values prescribed at point 75R (in the case of headlamps intended for left-hand traffic, the points to be considered are B50R, HV and 75L).

       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 paragraphs 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)

Tests Samples                      Lenses or samples of material   Lenses
                                   1                               2       3  4  5  6  7  8  9  10  11  12   13
1. 1. Limited photometry                                                                        X   X   X
(para. 2.1.2.)
1. 1. 1. Temperature change                                                                     X   X   X
(para. 2. 1. L)
1. 1.2. Limited photometry                                                                      X   X   X
(para. 2.1.2.)
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. ~. Atmospheric agents           X                               X       X
(para. 2.2.