Document ID: chunk:federal_register_of_legislation:F2023C00156:body:0:p12
Version: federal_register_of_legislation:F2023C00156
Segment Type: other
Provision Reference: 
Character Range: 31165–34256

device shall be subjected to photometric measurements 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 verification of conformity of products in paragraph 10.1. 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 7 (first sampling) would be 0.95.

       Annex 7

       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 devices shall not be contested if, when testing photometric performances of any device chosen at random and equipped with a standard filament lamp, 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:

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

       1.2.2. With respect to the gradient of luminance the unfavourable deviation may be: 2.5 x Bo/cm comparable to 20%

       3.0 x Bo/cm comparable to 30%

       1.2.3. If, in the case of a device equipped with a replaceable light source and if results of the test described above do not meet the requirements, tests on devices shall be repeated using another standard filament lamp.

       1.2.4. Devices with apparent defects are disregarded.

       2. FIRST SAMPLING

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

       2.1.1.1. sample A

       A1: one device                     0%

        one device not more than      20%

       A2: both devices more than                   0%

        but not more than       20%

       go to sample B

       2.1.1.2. sample B

       B1: both devices        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 devices shall be contested and the manufacturer requested to make his production meet the requirements (alignment) if the deviations of the measured values of the devices are:

       2.2.1.1. sample A