Document ID: chunk:federal_register_of_legislation:F2021C00467:body:0:p11
Version: federal_register_of_legislation:F2021C00467
Segment Type: other
Provision Reference: 
Character Range: 29455–32560

the same side of the letter "E" and face the same direction. The use of Roman numerals as approval numbers should be avoided so as to prevent any confusion with other symbols.

Figure 2
Simplified marking for Grouped, combined or reciprocally incorporated lamps

(The vertical and horizontal lines schematize the shape of the light-signalling device. These are not part of the approval mark.)

Model B

Model C

Model D

Note: The three examples of approval marks, models B, C and D represent three possible variables for the marking of a lighting device when two or more lamps are part of the same assembly or grouped, combined or reciprocally incorporated lamps. This approval mark shows that the device was approved in Japan (E 43) under approval number 3333 and comprising:
A direction indicator lamp of category 1 approved in accordance with the 01 series of amendments to Regulation No. 6;
A front position lamp approved in accordance with the 02 series of amendments to Regulation No. 7;
A cornering lamp approved in accordance with the 01 series of amendments to Regulation No. 119.

Figure 3
Light source modules

MD E3 17325

The light source module bearing the identification code shown above has been approved together with a lamp approved in Italy (E3) under approval number 17325.
Annex 3

Photometric measurements
          1. Measurement methods
              1.                                     When photometric measurements are taken, stray reflections shall be avoided by appropriate masking.
              2.                                     In the event that the results of measurements are challenged, measurements shall be taken in such a way as to meet the following requirements:
                  1.                               The distance of measurement shall be such that the law of the inverse of the square of the distance is applicable;
                  2.                               The measuring equipment shall be such that the angle subtended by the receiver from the reference centre of the light is between 10′ and 1°;
                  3.                               The intensity requirement for a particular direction of observation shall be satisfied if the required intensity is obtained in a direction deviating by not more than one quarter of a degree from the direction of observation.
          2. Measuring points expressed in degrees of angle with the axis of reference
Figure 1

2.1.                                    Field of geometric visibility
Figure 1

Figure 2

2.1.1.                              The directions H = 0° and V = 0° correspond to the axis of reference. On the vehicle they are horizontal, parallel to the median longitudinal plane of the vehicle and oriented in the required direction of visibility. They pass through the centre of reference. The values shown in the table give, for the various directions of measurement, the minimum intensities in cd.
3.                                          Photometric measurement of lamps equipped with several light sources
The photometric performance shall be checked: