Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p88
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 237725–240528

0.2 parts by weight of NaCMC[2/], and

       an appropriate quantity of distilled water, with a conductivity of <1mS/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 2/,

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

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

       The mixture must not be more than 14 days old.

       1.2.1.2. Application of the test mixture to the headlamp

       The test mixture shall be uniformly applied to the entire light emitting surface of the headlamp and then left to dry. This procedure shall be repeated until the illuminating value has dropped to 15-20% of the values measured for each following point under the conditions described in paragraph 1 above:

       Emax in driving beam for a driving/passing lamp,

       Emax in driving beam for a driving lamp only,

       50R and 50V [5/] for a passing lamp only, designed for right-hand traffic,

       50L and 50V 5/ for a passing lamp only, designed for left-hand traffic

       1.2.1.3. Measuring equipment

       The measuring equipment shall be equivalent to that used during headlamp approval tests. A standard (reference) filament lamp shall be used for the photometric verification.

       2. TEST FOR CHANGE IN VERTICAL POSITION OF THE CUT-OFF LINE UNDER THE INFLUENCE OF HEAT

       This test consists of verifying that the vertical drift of the cut-off line under the influence of heat does not exceed a specified value for an operating passing lamp.

       The headlamp tested in accordance with paragraph 1 shall be subjected to the test described in paragraph 2.1. without being removed from or readjusted in relation to its text fixture.

       2.1. Test

       The test shall be carried out in a dry and still atmosphere at an ambient temperature of 23 degrees C +/- 5 degrees C.

       Using a mass production filament lamp which has been aged for at least one hour the headlamp shall be operated on passing beam without being dismounted from or readjusted in relation to its test fixture. (For the purpose of this test, the voltage shall be adjusted as specified in paragraph 1.1.1.2.) The position of the cut-off line in its horizontal part (between vv and the vertical line passing through point B50R for left- hand traffic or B50L for right-hand traffic) shall be verified 3 minutes (r3) and 60   minutes (r60) respectively after operation.

       The