Document ID: chunk:federal_register_of_legislation:F2021C00466:body:0:p15
Version: federal_register_of_legislation:F2021C00466
Segment Type: other
Provision Reference: 
Character Range: 41225–44506

of this Regulation, particularly for the purpose of administrative verification and sampling.
5.3.                                    Nature of sampling
Samples of lamps shall be selected at random from the production of a uniform batch.  A uniform batch means a set of lamps of the same type, defined according to the production methods of the manufacturer.
The assessment shall in general cover series production from individual factories.  However, a manufacturer may group together records concerning the same type from several factories, provided these operate under the same quality system and quality management.
5.4.                                    Measured and recorded photometric characteristics
The sampled lamp shall be subjected to photometric measurements for the minimum values at the points listed in Annex 4 and the required chromaticity coordinates
5.5.                                    Criteria governing acceptability
The manufacturer is responsible for carrying out a statistical study of the test results and for defining, in agreement with the Type Approval Authority, criteria governing the acceptability of his products in order to meet the specifications laid down for verification of conformity of products in paragraph 12.1. of this Regulation.
The criteria governing the acceptability shall be such that, with a confidence level of 95 per cent, the minimum probability of passing a spot check in accordance with Annex 6 (first sampling) would be 0.95.
Annex 6
Minimum requirements for sampling by an inspector

6.                                          General
6.1.                                    The conformity requirements shall be considered satisfied from a mechanical and a geometric standpoint, in accordance with the requirements of this Regulation, if any, if the differences do not exceed inevitable manufacturing deviations.
6.2.                                    With respect to photometric performance, the conformity of mass-produced lamps shall not be contested if, when testing photometric performances of any lamp chosen at random and equipped with a standard light source, or when the lamps are equipped with non-replaceable light sources (filament lamps or other), and when all measurements are made at 6.75 V, 13.5 V or 28.0 V respectively:
6.2.1.                              No measured value deviates unfavourably by more than 20 per cent from the values prescribed in this Regulation.
6.2.2.                              If, in the case of a lamp equipped with a replaceable light source and if results of the test described above do not meet the requirements, tests on lamps shall be repeated using another standard light source.
6.2.3.                              Lamps with apparent defects are disregarded.
6.3.                                    The chromaticity coordinates shall be complied with when the lamp is equipped with a standard light source, or for lamps equipped with non-replaceable light sources (filament lamps or other), when the colorimetric characteristics are verified with the light source present in the lamp.
7.                                          First sampling
In the first sampling four lamps are selected at random.  The first sample of two is marked A, the second sample of two