Document ID: chunk:federal_register_of_legislation:F2023C00154:front:0:p33
Version: federal_register_of_legislation:F2023C00154
Segment Type: other
Provision Reference: 
Character Range: 85777–88261

of the front fog lamp that is mounted on a base representative of the correct installation on the vehicle:
(a) Operation of the front fog lamp for one hour. (The voltage shall be adjusted as specified in paragraph 1.1.2. of this annex).
(b) Period of rest for one hour.
2.2.3. The front fog lamp type shall be considered acceptable if the mean value of the absolute values ∆ rI measured on the first sample and ∆ rII measured on the second sample is not more than 2 mrad.
Annex 6

Requirements for lamps incorporating lenses of plastic material - Testing of lens or material samples and of complete lamps
1. General specifications
1.1. The samples supplied pursuant to paragraph 2.2.2. of this Regulation shall satisfy the specifications indicated in paragraphs 2.1.to 2.5. below.
1.2. The two samples of complete lamps supplied pursuant to paragraph 2.3. of this Regulation (or paragraph 2.4. of this Regulation as applicable) and incorporating lenses of plastic material shall, with regard to the lens material, satisfy the specifications indicated in paragraph 2.6. below.
1.3. The samples of lenses of plastic material or samples of material shall be subjected, with the reflector to which they 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.
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