Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p89
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 240275–243219

the cut-off line in its horizontal part (between vv and the vertical line passing through point B50R for left- hand traffic or B50L for right-hand traffic) shall be verified 3 minutes (r3) and 60   minutes (r60) respectively after operation.

       The measurement of the variation in the cut-off line position as described above shall be carried out by any method giving acceptable accuracy and reproducible results.

       2.2. Test results

       2.2.1. The result expressed in milliradians (mrad) shall be considered as acceptable when the absolute valuedelta r1+ /r3 - r60 recorded on the headlamp is not more than 1.0mrad (delta r1< 1.0mrad).

       2.2.2. However, if this value is more than 1.0mrad but not more than 1.5mrad (1.0mrad <delta  r1<1.5mrad), a second headlamp shall be tested as described in paragraph 2.1. after    being subjected three consecutive times to the cycle as described below, in order to stabilize the position of mechanical parts of the headlamp on a base representative of the correct installation on the vehicle:

       Operation of the passing lamp for one hour (the voltage shall be adjusted as specified in paragraph 1.1.1.2.).

       Period of rest for one hour.

       The headlamp type shall be considered as acceptable if the mean value of the absolute valuesddelta r1 measured on the first sample and delta r11 measured on the second sample is not more than 1.0mrad.

       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 2.2.4. 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 2.2.3. of this Regulation 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.

       1.4. However, if the lamp manufacturer can prove that the product has already passed the tests prescribed in paragraphs 2.1.-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 degrees C +/- 2 degrees C and 85-95% RH;

       1 hour at 23 degrees C