Document ID: chunk:federal_register_of_legislation:F2023C00142:reg:1:p4
Version: federal_register_of_legislation:F2023C00142
Segment Type: reg
Provision Reference: reg 1 (pt 4/12)
Character Range: 82925–85639

be corrected accordingly.
         or
         equipped with the serial production gas-discharge light source and the serial ballast.  The luminous flux of this light source may deviate from the nominal luminous flux due to light source and ballast tolerances as specified in Regulation No. 99; accordingly the measured illuminances may be corrected by 20 % in the favourable direction.
         1.2.1. no illuminance value, if measured and corrected according to paragraph 1.2. above, deviates unfavourably by more than 20 % from the values prescribed in this Regulation. For values B 50 L (or R) and on line H/H2 (or H/H3/H4) and above, the maximum unfavourable deviation may be respectively:
B 50, L (or R): [1]/          0.20  lx equivalent 20 %
                              0.30  lx equivalent 30 %
On line H/H2
(or line H/H3/H4) and above:  0.30  lx equivalent 20 %
                              0.45  1x equivalent 30 %

         1.2.2. or if
         1.2.2.1. for the passing beam, the values prescribed in this Regulation a met at HV (with a tolerance of + 0.2 lx) and related to that aiming at one point of each area delimited on the measuring screen (at 25 m) by a circle 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 line 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.
         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 as acceptable if deltar (as defined in paragraphs 2.1. and 2.2. of annex 4 to this Regulation) does not exceed