Measuring procedure. After adjustment of the initial setting of beam orientation, the vertical inclination of the passing beam or, when applicable, the vertical inclinations of all the different lighting units that provide or contribute to the cut-off(s) according to paragraph 6.
22.6.1.2.1. above of the basic passing beam, shall be verified for all loading conditions of the vehicle in accordance with the specifications in paragraphs 6.2.6.3.1. and 6.2.6.3.2. of this Regulation.
Measuring procedure. Luminance measurements shall be made on a diffuse colourless surface with known diffuse reflection factor6. The diffuse colourless surface shall have the dimensions of the registration plate or the dimension exceeding one measuring point. Its centre shall be placed in the centre of the positions of the measuring points. This diffuse colourless surface(s) shall be placed in the position normally occupied by the registration plate and 2 mm in front of its holder. Luminance measurements shall be made perpendicularly to the surface of the diffuse colourless surface with the tolerance of 5° in each direction at the points shown in Annex 3 to this Regulation, each point representing a circular area of 25 mm in diameter. The measured luminance shall be corrected for the diffuse reflection factor 1.0.
Measuring procedure. After adjustment of the initial setting of beam orientation, the vertical inclination of the passing-beam or, when applicable, the vertical inclinations of all the different lighting units that provide or contribute to the cut-off(s) according to paragraph 6.22.
Measuring procedure. 2.1. The tyre, mounted on its rim, shall be conditioned at the ambient room temperature for not less than 24 hr, save as otherwise required by paragraph 6.8.3. of this Regulation.
2.2. The tyre pressure shall be readjusted to the level specified in paragraph 1.2. of this annex.
2.3. The overall width shall be measured at six equally spaced points around the tyre, taking account of the thickness of any protective ribs or bands. The highest reading obtained shall be taken as the overall width.
2.4. The outer diameter shall be calculated from a measurement of the maximum circumference of the inflated tyre.
1. Preparing the tyre
1.1. Mount a retreaded tyre on the test rim specified by the retreader.
1.2. Inflate the tyre to the appropriate pressure as given (in bar) in the table below: Speed Category Diagonal (bias-ply) tyres Radial Tyres Bias-belted tyres Ply-rating Standard Reinforced Standard L, M, N 2.3 2.7 3.0 2.4 - - P, Q, R, S 2.6 3.0 3.3 2.6 3.0 2.6 T, U, H 2.8 3.2 3.5 2.8 3.2 2.8 V 3.0 3.4 3.7 3.0 3.4 -
1.3. The retreading production unit may request, giving reasons, the use of a test inflation pressure different from those given in paragraph 1.2. of this annex. In this case the tyre shall be inflated to the requested pressure.
1.4. Condition the tyre and wheel assembly at test-room temperature for not less than three hours.
1.5. Readjust the tyre pressure to that specified in paragraph 1.2. or
Measuring procedure. Luminance measurements shall be made on a piece of clean white blotting paper with a minimum diffuse reflection factor of 70 per cent, having the same dimensions as the registration plate, placed in the position normally occupied by it and 2 mm in front of its holder. Luminance measurements shall be made perpendicular to the surface of the paper at the points shown in paragraph 5. of this annex, each point representing a circular area of 25 mm in diameter. For an illuminating device not equipped with filament lamps, the luminance values measured after one minute and after 30 minutes of operation shall comply with the minimum requirements. The luminance distribution after one minute of operation can Annex 6 be calculated from the luminance distribution after 30 minutes of operation, by applying at each test point the ratio of luminance values measured at one point after one minute and after 30 minutes of operation.
