Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:7:p8
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 7 (pt 8/12)
Character Range: 613315–616004

are intended to be fitted (where applicable), to approval tests in the chronological order indicated in table A reproduced in Appendix 1 to this Annex.

       1.4. However, if the lamp manufacturer can prove that the product has already passed the tests prescribed in paragraphs 2.1. to 2.5. below, or the equivalent tests pursuant to another regulation, those tests need not be repeated; only the tests prescribed in Appendix 1, table B, shall be mandatory.

       2. TESTS

       2.1. Resistance to temperature changes

       2.1.1. Tests

       Three new samples (lenses) shall be subjected to five cycles of temperature and humidity (RH = relative humidity) change in accordance with the following programme:

       3 hours at 40 °C  2 °C and 85-95 per cent RH;
       1 hour at 23 °C  5 °C and 60-75 per cent RH;
       15 hours at -30 °C  2 °C;
       1 hour at 23 °C  5 °C and 60-75 per cent RH;
       3 hours at 80 °C  2 °C;
       1 hour at 23 °C  5 °C and 60-75 per cent RH;

       Before this test, the samples shall be kept at 23 °C  5 °C and 60-75 per cent RH for at least four hours.

             Note: The periods of one hour at 23 °C  5 °C shall include the periods of transition from one temperature to another which are needed in order to avoid thermal shock effects.

       2.1.2. Photometric measurements

       2.1.2.1. Method

       Photometric measurements shall be carried out on the samples before and after the test.

       These measurements shall be made using a standard (étalon) lamp, at the following points:

       B 50, 50L and 50R for Class B headlamp, 0.86D/3.5R, 0.86D/3.5L, 0.50U/1.5L and 1.5R for Class C and D headlamp for the passing beam or a passing / driving lamp;

       Emax for the driving beam of a driving lamp or a passing/driving lamp;

       2.1.2.2. Results

       The variation between the photometric values measured on each sample before and after the test shall not exceed 10 per cent including the tolerances of the photometric procedure.

       2.2. Resistance to atmospheric and chemical agents

       2.2.1. Resistance to atmospheric agents

       Three new samples (lenses or samples of material) shall be exposed to radiation from a source having a spectral energy distribution similar to that of a black body at a temperature between 5,500 K and 6,000 K. Appropriate filters shall be placed between the source and the samples so as to reduce as far as possible radiations with wave lengths smaller than 295 nm and greater than 2,500 nm. The samples shall be exposed to an energetic illumination of 1,200 W/m2  200 W/m2 for a period such that the luminous energy that they receive is equal to 4,500