Document ID: chunk:federal_register_of_legislation:F2023C00142:reg:1:p12
Version: federal_register_of_legislation:F2023C00142
Segment Type: reg
Provision Reference: reg 1 (pt 12/12)
Character Range: 104228–105719

more light sources be simultaneously lit when headlamp flashing is used, this shall not be considered as being normal use of the light sources simultaneously.
[1/] When the tested headlamp is grouped and/or reciprocally incorporated with signalling lamps, the latter shall be lit for the duration of the test.  In the case of a direction indicator lamp, it shall be lit in flashing operation mode with an on/off time ratio of approximately one to one.
[3/] NaCMC represents the sodium salt of carboxymethylcellulose, customarily referred to as CMC.  The NaCMC used in the dirt mixture shall have a degree of substitution (DS) of 0.6-0.7 and a viscosity of 200-300 cP for a 2 % solution at 20 degrees C.
[4/] The tolerance on quantity is due to the necessity of obtaining a dirt that correctly spreads out on all the plastic lens.
[1/] For L2 it is recommended to use a focal distance of about 80 mm.
[1] Letters in brackets refer to headlamps intended for left-hand traffic.
[1/] Letters in brackets refer to headlamps intended for left-hand traffic.
[2/] When the driving beam is reciprocally incorporated with the passing beam, HV in the case of the driving beam shall be the same measuring point as in the case of the passing beam.
[3/] HL and HR: points on "hh" located at 1.125 m to the left and to the right of point HV respectively.
[1/] Letters in brackets refer to headlamps intended for left-hand traffic.
[1/] Letters in brackets refer to headlamps intended for left-hand traffic.