Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:1:p25
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 1 (pt 25/40)
Character Range: 403769–406631

the requirements laid down in paragraph 8.3.

       8.3.2. The illumination produced on the screen by the driving beam shall meet the following requirements:

       8.3.2.1. The point of intersection HV of lines hh and vv shall be situated within the isolux 80% of maximum illumination.  This maximum value (EM) shall not be less than 48 lux.  The maximum value (EM) shall not exceed 240 lux; in addition, in the case of a combined passing and driving HSB unit, it shall in no case exceed 16 times the illumination measured for the passing beam at point 75 R (or 75 L).

       8.3.2.1.1. The maximum intensity (IM) of the driving beam expressed in thousands of candelas shall be calculated by the formula:

       IM = 0.625 EM

       8.3.2.1.2. The reference mark (I'M) of this maximum intensity, referred to in paragraph 5.2.2.5., shall be obtained by the ratio:

       This value shall be rounded off to the nearest value 7.5 12.5 - 17.5 25 - 27.5 37.5 45 - 50.

       8.3.2.2. Starting from point HV, horizontally to the right and left, the illumination shall be not less than 24 lux up to a distance of 1.125 m and not less than 6 lux up to a distance of 2.25 m.

       9.  COLOUR

       9.1. Approval may be obtained for HSB units emitting either white or selective yellow light.[11/] Expressed in CIE trichromatic coordinates, the corresponding colorimetric characteristics for selective yellow light are as follows at the test voltage:

Limit towards red                   y > 0.138 + 0.580x
Limit towards green                 y < 1.290x - 0.100
Limit towards white                 y > -x + 0.966
Limit towards spectral value        y < -x + 0.992
which can be expressed as follows:
dominant wave length:               575 to 585 nm
purity factor:                      0.90 to 0.98

       9.2. The illumination produced on the screen by a selective yellow passing beam shall meet the requirements of paragraphs 8.2.5. and 8.2.6. with the minimum illuminations multiplied by a factor of 0.85; the maximum illumination values remain the same.

       10. GAUGING OF DISCOMFORT

       The discomfort caused by the passing beam of HSB units shall be gauged. [12/]

       11. CONFORMITY OF PRODUCTION

       11.1. Headlamps approved under this Regulation shall be so manufactured as to conform to the type approved by meeting the requirements set forth in paragraph 8 and 9.

       11.2. In order to verify that the requirements of paragraph 11.1. are met, suitable controls of the production shall be carried out.

       11.3. The holder of the approval shall in particular:

       11.3.1. ensure the existence of procedures for the effective control of the quality of products:

       11.3.2. have access to the control equipment necessary for checking the conformity to each approved type;

       11.3.3. ensure that data of test results