Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p117
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 316034–318966

+/- 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, [2/]

          (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 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 specified for individual lighting functions (a), also taking into account the use of reciprocally incorporated lighting functions (b), according to the manufacturer's specifications.

       1.1.1.2. Test voltage

       The voltage shall be adjusted so as to supply 90 % of the maximum wattage specified in the Regulation for filament lamps (Regulation No. 37).

       The applied wattage shall in all cases comply with the corresponding value of a filament lamp of 12 V rated voltage, except if the applicant for approval specifies that the headlamp may be used at a different voltage. In the latter case, the test shall be carried out with the filament lamp whose wattage is the highest that can be used.

       1.1.2. Test results

       1.1.2.1. Visual inspection

       Once the headlamp has been stabilized to the ambient temperature, the headlamp lens and the external lens, if any, shall be cleaned with a clean, damp cotton cloth. It shall then be inspected visually; no distortion, deformation, cracking or change in colour of either the headlamp lens or the external lens, if any, shall be noticeable.

       1.1.2.2. Photometric test

       To comply with the requirements of this Regulation, the photometric values shall be verified in the following points:

       Passing beam:

        50 R - B 50 L - HV for headlamps designed for right-hand traffic,

        50 L - B 50 R - HV for headlamps designed for left-hand traffic.

       Driving beam

        Point of Emax

       Another aiming may be carried out to allow for any deformation of the headlamp base due to