Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p86
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 232225–235296

a maximum luminous intensity between x and y candelas, meeting the requirements of Regulation No. 8, and

       A headlamp emitting a driving beam for both traffic systems with a maximum luminous intensity comprised between w and z candelas, meeting the requirements of Regulation No. 20, the maximum luminous intensity of the driving beams as a whole being comprised between 86,250 and 111,250 candelas.

       Annex 4

       MEASURING SCREEN

       A. Headlamp for right-hand traffic (dimensions in mm)

       B. Headlamp for left-hand traffic (dimensions in mm)

       C. Measuring points for illumination values

       Note:

       Figure C shows the measuring points for right-hand traffic.

       Points 7 and 8 move to their corresponding location at the right-hand side of the picture for left-hand traffic.

       Annex 5

TESTS FOR STABILITY OF PHOTOMETRIC PERFORMANCE OF HEADLAMPS IN OPERATION

       TESTS ON COMPLETE HEADLAMPS

       Once the photometric values have been measured according to the requirements of this Regulation in points for Emax for driving beam and HV, 50R, B50L for passing beam (or HV, 50L, B50R for headlamps designed for left-hand traffic) a complete headlamp sample shall be tested for stability of photometric performance in operation. "Complete headlamp" shall be understood to mean the complete lamp itself, including those surrounding body parts and lamps which could influence its thermal dissipation.

       1. TEST OF STABILITY OF PHOTOMETRIC PERFORMANCE

       The tests shall be carried out in a dry and still atmosphere at an ambient temperature of 23 degrees C +/- 5 degrees C, the complete headlamp being mounted on a base representing the correct installation on the vehicle.

       1.1. Clean headlamp

       The headlamp shall be operated for 12 hours as described in subparagraph 1.1.1. and checked as prescribed in subparagraph 1.1.2.

       1.1.1. Test procedure

       The headlamp shall be operated for a period according to the specified time, so that: 1.1.1.1.

          (a) in the case where only one lighting function (driving or passing beam) is to be approved, the corresponding filament is lit for the prescribed time, 1/

          (b) in the case of a reciprocally incorporated passing lamp and driving lamp (dual filament lamp or two filament lamps):

           If the applicant declares that the headlamp is to be used wit a single filament lit,2/ the test shall be carried out in accordance with this condition, activating1/ each specified function successively for half the time specified in paragraph 1.1,

           In all other cases,[1/] [2/] the headlamp shall be subjected to the following cycle until the time specified is reached:

           15 minutes, passing-beam filament lit

           5 minutes, all filaments lit

          (c) in the case of grouped lighting functions, all the individual functions shall be lit simultaneously for the time specified for individual lighting functions (a) also taking into account the use of reciprocally incorporated lighting