Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:1:p31
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 1 (pt 31/40)
Character Range: 419957–422684

Fig. 3

       Annex 4

       MEASURING SCREEN

       A. HSB unit for right-hand traffic

       B. HBS unit for left-hand traffic

       Annex 5

MINIMUM REQUIREMENTS FOR CONFORMITY OF PRODUCTION CONTROL PROCEDURES

       1. GENERAL

       1.1. The conformity requirements shall be considered satisfied from a mechanical and geometric standpoint, if the differences do not exceed inevitable manufacturing deviations within the requirements of this Regulation.

       1.2. With respect to photometric performance, the conformity of mass-produced headlamps shall not be contested if, when testing photometric performance of any headlamp chosen at random:

       1.2.1. no measured value deviates unfavourably by more than 20 % from the values prescribed in this Regulation.  For values B 50 L (or R) and zone III, the maximum unfavourable deviation may be respectively:

B 50 L (or R):  0.2   lx equivalent 20 %
                0.3   lx equivalent 30 %
Zone III:       0.3   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 R, 25 L, and in the entire area of zone IV which is not more than 22.5 cm above line 25 R and 25 L;

       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 8.3. 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 1 degrees to the right or left. [10/]

       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 6 after being subjected three consecutive times to the cycle described in paragraph 2.2.2. of annex 6.

       The headlamp shall be considered as acceptable if delta r 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