Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:1:p33
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 1 (pt 33/40)
Character Range: 425233–428077

case of the driving beam, and to points B 50 L (or R), HV, 50 V, 75 R (or L) and 25 L (or R) in the case of the passing beam (see figure in annex 4).

       2.5. Criteria governing acceptability

       The manufacturer is responsible for carrying out a statistical study of the test results and for defining, in agreement with the competent authority, criteria governing the acceptability of his products in order to meet the specifications laid down for verification of conformity of products in paragraph 11.1. of this Regulation.

       The criteria governing the acceptability shall be such that, with a confidence level of 95 %, the minimum probability of passing a spot check in accordance with annex 8 (first sampling) would be 0.95.

       Annex 6

TESTS FOR STABILITY OF PHOTOMETRIC PERFORMANCE OF HEADLAMPS IN OPERATION TESTS ON COMPLETE HEADLAMPS

       Once the photometric values have been measured according to the prescriptions of this Regulation, in points for E max for driving beam and HV, 50 R, B 50 L for passing beam (or HV, 50 L, B 50 R 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:

           (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, 2/

           (b)  in the case of a reciprocally incorporated passing lamp and driving lamp (dual filament HSB headlamp):

       If the applicant declares that the headlamp is to be used with a single filament lit [1/] at a time, the test shall be carried out in accordance with this condition, activating [2/] 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