Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:1:p34
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 1 (pt 34/40)
Character Range: 427803–430743

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 this Regulation for the type(s) of HSB headlamp(s) concerned is (are) obtained.

       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 heat (the change of the position of the cut-off line is covered in para. 2 of this annex);

       A 10% discrepancy between the photometric characteristics and the values measured prior to the test is permissible including the tolerances of the photometric procedure.

       1.2. Dirty headlamp

       After being tested as specified in subparagraph 1.1. above, the headlamp shall be operated for one hour as described in subparagraph 1.1.1., after being prepared as prescribed in subparagraph 1.2.1., and checked as prescribed in subparagraph 1.1.2.

       1.2.1. Preparation of the headlamp

       1.2.1.1. Test mixture

       1.2.1.1.1. For headlamp with the outside lens in glass:

       The mixture of water and a polluting agent to be applied to the headlamp shall be composed of:

       9 parts by weight of silica sand with a particle size of 0-100 mu m,

       1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 mu m, 0.2 part by weight of NaCMC [3/] , and

       an appropriate quantity of distilled water, with a conductivity of < 1 mS/m.

       The mixture must not be more than 14 days old.

       1.2.1.1.2. For head lamp with outside lens in plastic material:

       The mixture of water and polluting agent to be applied to the headlamp shall be composed of:

       9 parts by weight of silica sand with a particle size of 0-100