Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:7:p3
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 7 (pt 3/12)
Character Range: 600146–603037

and the front fog lamp for one third of the time specified in paragraph 1.1. above.

       1.1.1.2. Test voltage

       The voltage shall be adjusted so as to supply 90 per cent of the maximum wattage specified in Regulation No. 37 for the filament lamp(s) used.

       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.

       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:

       For Class B headlamp:

        Passing beam: 50R - 50L - B50 - HV.
        Driving beam: Point of Emax

       For Class C and D headlamp:

        Passing beam: 0.86D/3.5R - 0.86D/3.5L - 0.50U/1.5L & 1.5R - HV.
         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 paragraph 2. of this annex).

       A 10 per cent 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 paragraph 1.1. above, the headlamp shall be operated for one hour as described in paragraph 1.1.1., after being prepared as prescribed in paragraph 1.2.1., and checked as prescribed in paragraph 1.1.2.

       1.2.1. Preparations 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 m,

           1 part by weight of vegetal carbon dust (beechwood) with a particle size of     0-100 m,

           0.2 parts by weight of NaCMC [39]/, 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 headlamp 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 m,

           1 part by weight of vegetal carbon