Document ID: chunk:federal_register_of_legislation:F2023C00161:reg:400:p8
Version: federal_register_of_legislation:F2023C00161
Segment Type: reg
Provision Reference: reg 400 (pt 8/10)
Character Range: 45203–48077

diameter of the focus-diaphragm with respect to the focus-length of the optical system shall be not more than d = 2f tan (mu).

The active diameter of the optical system shall be not more than:

D = (1 + 1/M)d + c + (bl + b2)/2. (c, bl and b2 are given on sheet DlS/D2S/4 respectively sheet D2R/4).

A scale on the screen shall enable measurement of the position of the electrodes.  The calibration of the arrangement advantageously can be done by using a separate projector with a parallel beam in connection with a gauge whose shadow is projected to the screen.  The gauge shall show the reference axis and the plane parallel to the reference plane and at distance "e" mm from it.  (e = 27.1 for DlS, D2S and D2R).

In the plane of the screen a receiver has to be mounted movable in a vertical direction on a line corresponding to the plane at "e" from the reference plane of the gas-discharge light source.

The receiver shall have the relative spectral sensitivity of the human eye.  The size of the receiver shall be not more than 0.2Mmm in the horizontal direction and not more than 0.025Mmm in the vertical direction.  (M = the magnification.)  The range of the measurable movement shall be such that the required measures of the   arc bending r and arc diffusion s can be measured.

Annex 6

MINIMUM REQUIREMENTS FOR QUALITY CONTROL PROCEDURES BY THE MANUFACTURER

       1. GENERAL

       The conformity requirements shall be considered satisfied from a photometric (including UV-radiation), geometrical, visual and electrical standpoint if the specified tolerances for production gas-discharge light sources in the relevant data sheet of annex 1 and the relevant data sheet for the caps are met.

       2. MINIMUM REQUIREMENTS FOR VERIFICATION OF CONFORMITY BY THE MANUFACTURER

       For each type of gas-discharge light source the manufacturer or the holder of the approval mark shall carry out tests, in accordance with the provisions of this Regulation, at appropriate intervals.

       2.1. Nature of tests

       Tests of conformity of these specifications shall cover their photometrical, geometrical and optical characteristics.

       2.2. Methods used in tests

       2.2.1. Tests shall generally be carried out in accordance with the methods set out in this Regulation.

       2.2.2. The application of paragraph 2.2.1. requires regular calibration of test apparatus and its correlation with measurements made by a competent authority.

       2.3. Nature of sampling

       Samples of gas-discharge light sources shall be selected at random from the production of a uniform batch.  A uniform batch means a set of gas-discharge light sources of the same type, defined according to the production methods of the manufacturer.

       2.4. Inspected and recorded characteristics

       The gas-discharge light sources shall be inspected and test