Document ID: chunk:federal_register_of_legislation:F2023C00153:front:0:p15
Version: federal_register_of_legislation:F2023C00153
Segment Type: other
Provision Reference: 
Character Range: 41646–44734

representative of the correct installation on the vehicle:
Operation of the passing lamp for one hour (the voltage shall be adjusted as specified in paragraph 1.1.1.2),
Period of rest for one hour.
The headlamp type shall be considered as acceptable if the mean value of the absolute values delta rI measured on the first sample and deltarII measured on the second sample is not more than 1.0 mrad:

Annex 5

MINIMUM REQUIREMENTS FOR CONFORMITY OF PRODUCTION CONTROL PROCEDURES

          1. GENERAL
              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.
              2.                                     With respect to photometric performances, the conformity of mass-produced headlamps shall not be contested if, when testing photometric performances of any headlamp chosen at random and equipped with a standard filament lamp:
                  1.                               no measured value deviates unfavourably by more than 20 % from the values prescribed in this Regulation.  For value in zone III, the maximum unfavourable deviation may be respectively:
0.3 lux equivalent 20 %
0.45 lux equivalent 30 %
1.2.2.                              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 Annex 3, paragraphs 4.3 and 4.4 of this Regulation.
1.2.3.                              If the results of the tests described above do not meet the requirements, tests on the headlamp shall be repeated, using another standard filament lamp.
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 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 1.5 mrad.
1.4.                                    The chromaticity coordinates shall be complied with when the headlamp is equipped with a filament lamp set to Standard A colour temperature.
The photometric performance of a headlamp emitting selective yellow light when equipped with a colourless filament lamp shall be the values contained in this Regulation multiplied by 0.84.

2.                                          MINIMUM REQUIREMENTS FOR VERIFICATION OF CONFORMITY BY THE MANUFACTURER
For each type of headlamp the holder of the approval mark shall carry