Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p22
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 60071–62854

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 heat (the change of the position of the cut-off line is covered in Paragraph 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 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 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 parts 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 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 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/],

       13 parts by weight of distilled water with a conductivity of < 1 mS/m, and

       2 +/- 1 parts by weight of surface-actant. [4/]

       The mixture must not be more than