Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:6v:p7
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 6V (pt 7/19)
Character Range: 134829–139711

insertion past the lamp key. The envelope is concentric to the reference axis.
4/ The keyway is mandatory.
    5/ The filament lamp shall be rotated in the measuring holder until the reference lug contacts plane C of the holder.
CATEGORIES HB4 AND HB4A

Sheet HB4/2

6/ The bulb shall be colourless or yellow.
    7/ Glass bulb periphery shall be optically distortion-free axially within the angles gamma1 and gamma2. This requirement applies to the whole bulb circumference within the angles gamma1 and gamma2.
    8/ The obscuration shall extend to at least angle gamma3 and shall be at least as far as the undistorted part of the bulb defined by angle gamma1.
CATEGORIES HB4 AND HB4A

                                                   Sheet HB4/3

   Dimensions in mm                                        Tolerances
    13/
                                                           Filament lamps of normal production  Standard filament lamp

   e 10/ 12                                                31.5                                           11                    +/- 0.16
/                                                                                                         /
    f 10/ 12                                               5.1                                            11                    +/- 0.16

/                                                                                                         /
h1, h2                                                        0                                           11                   +/- 0.15

h3                                                            0                                           /                    9/
                                                                                                          11                   +/- 0.08
g 10/                                                      0.75                                           /                    9/
                                                                                                +/- 0.5                 +/- 0.3
    gamma1                                                 50 degrees                           -                       -
                                                           min.
    gamma2                                                 52 degrees                           -                       -
                                                           min.
    gamma3                                                 45 degrees                           +/- 5 degrees           +/- 5 degrees
Cap P 22d in accordance with IEC 61 (sheet 7004-32-2) 14/
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
Rated values                                                  V                                           12            12
                                                              W                                           51            51
Test voltage                                                  V                                 13.2                    13.2
Objective values                                              W                                 62 max.                         62 max.
                                                           Luminous                             1,095
                                                           flux 1m
                                                           +/- %
                                                                                                          15
Reference luminous flux for headlamp testing:
825 1m at approx. 12V

    9/ The eccentricity is measured only in viewing directions */ A and B as shown in the figure on sheet HB4/1. The points to be measured are those where the projection of the outside of the end turns nearest to or furthest from the reference plane crosses the filament axis.
10/ The viewing direction is direction */ B as shown in the figure on sheet HB4/1.
11/ To be checked by means of a "box-system". Sheet HB4/4. */
    12/ The ends of the filament are defined as the points where, when the viewing direction */ as defined in note 10/ above, the projection of the outside of the end turns crosses the filament axis.
13/ Dimensions shall be checked with O-ring removed.
14/ Filament lamp HB4 shall be equipped with the right-angle cap and filament lamp HB4A with the straight cap.

    */ Manufacturers may choose another set of perpendicular viewing directions. The viewing directions specified by the manufacturer are to be used by the testing laboratory when checking filament dimensions and position.

CATEGORIES HB4 AND HB4A

Sheet HB4/4

Screen projection requirements
 This test is used to determine, by checking whether the filament is correctly positioned relative to the reference axis and the reference plane, whether a filament