Document ID: chunk:federal_register_of_legislation:F2023C00142:reg:1:p7
Version: federal_register_of_legislation:F2023C00142
Segment Type: reg
Provision Reference: reg 1 (pt 7/12)
Character Range: 90920–93590

at HV (with a tolerance of + 0.2 Ix) and related to that aiming at one point of each area delimited on the measuring screen (at 25 m) by a circle of 15 cm in radius around points B 50 L (or R) 1/ (with a tolerance of 0.1 lx), 75 R (or L), 50 V, 25 Rl, 25 L2, and on segment I;
         1.2.2.2. and if, for the driving beam, HV being situated within the isolux 0.75 Emax, a tolerance of + 20 % for maximum values and - 20 % for minimum values is observed for the photometric values at any measuring point specified in paragraph 6.3. of this Regulation. The reference mark is disregarded.
         1.2.3. If the results of the tests described above do not meet the requirements, the alignment of the headlamp may be changed, provided that the axis of the beam is not displaced laterally by more than 0.5 degrees to the right or left and not by more than 0.2 degrees up or down.
         1.2.4. If the results of the tests described above do not meet the requirements, tests on the headlamp shall be repeated using another standard gas-discharge light source or gas- discharge light source and ballast, whatever is applicable according to paragraph 1.2. above.
         1.3. With respect to the verification of the change in vertical position of the cut-off line under the influence of heat, the following procedure shall be applied:
         One of the sampled headlamps shall be tested according to the procedure described in paragraph 2.1. of annex 4 after being subjected three consecutive times to the cycle described in paragraph 2.2.2. of annex 4.
         The headlamp shall be considered acceptable if deltar (as defined in paragraphs 2.1. and 2.2. of annex 4 to this Regulation) does not exceed 1.5 mrad.
         If this value exceeds 1.5 mrad but is not more than 2.0 mrad, a second headlamp shall be subjected to the test after which the mean of the absolute values recorded on both samples shall not exceed 1.5 mrad.
         1.4. The chromaticity coordinates as specified in paragraph 6.1.6. of this Regulation shall be complied with.
         2.              FIRST SAMPLING
         In the first sampling four headlamps are selected at random.  The first sample of two is marked A, the second sample of two is marked B.
         2.1. The conformity is not contested
         2.1.1. Following the sampling procedure shown in Figure 1 of this annex the conformity of mass-produced headlamps shall not be contested if the deviation of the measured values of the headlamps in the unfavourable directions are:
         2.1.1.1. sample A
A1:  one headlamp                0 %
     one headlamp not more than  20 %
A2:  both headlamps more than    0 %
     but not