Document ID: chunk:federal_register_of_legislation:F2023C00158:reg:14:p2
Version: federal_register_of_legislation:F2023C00158
Segment Type: reg
Provision Reference: reg 14 (pt 2/5)
Character Range: 64443–67768

a set of retro-reflectors 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.

       2.4. Measured and recorded photometric characteristics

       The sampled retro-reflector shall be subjected to photometric measurements at the points and the chromaticity coordinates provided for in the Regulation.

       2.5. Criteria governing acceptability

       The manufacturer is responsible for carrying out a statistical study of the test results and for defining, in agreement with the competent authority, criteria governing the acceptability of his products in order to meet the specifications laid down for the verification of conformity of products in paragraph 8.1. of this Regulation.

       The criteria governing the acceptability shall be such that, with a confidence level of 95%, the minimum probability of passing a spot check in accordance with annex 18 (first sampling) would be 0.95.

       Annex 18

       MINIMUM REQUIREMENTS FOR SAMPLING BY AN INSPECTOR

       1. GENERAL

       1.1. 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.

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

       1.2.1. no measured value deviates unfavourably by more than 20% from the minimum values prescribed in this Regulation.

       1.2.2. Retro-reflectors with apparent defects are disregarded.

       1.3. The chromaticity coordinates shall be complied with.

       2. FIRST SAMPLING

       In the first sampling four retro-reflectors 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 retro-reflectors shall not be contested if the deviation of the measured values of the retro-reflectors in the unfavourable directions are:

       2.1.1.1. sample A

       A1: one retro-reflector      0%

         one retro-reflector not more than    20%

       A2: both retro-reflectors more than    0%

         but not more than      20%

       go to sample B

       2.1.1.2. sample B

       B1: both retro-reflectors      0 %

       2.2. The conformity is contested

       2.2.1. Following the sampling procedure shown in Figure 1 of this annex the conformity of mass-produced retro-reflectors shall be contested and the manufacturer requested to  make his production meet the requirements (alignment) if the deviations of the measured values of the retro-reflectors are:

       2.2.1.1. sample A

       A3: one retro-reflector not more than    20%

         one retro-reflector more than     20%

         but not more than      30%

       2.2.1.2.