Test voltage. (a) In case of replaceable filament light source(s) operated directly under vehicle voltage system conditions: The voltage shall be adjusted so as to supply 90 per cent of the maximum wattage specified in Regulation No. 37 for the filament light source(s) used. The applied wattage shall in all cases comply with the corresponding value of a filament light source of 12 V rated voltage, except if the applicant specifies that the test sample may be used at a different voltage. In this case, the test shall be carried out with the filament light source whose wattage is the highest that can be used. (b) In case of replaceable gas discharge light source(s): The test voltage for the electronic light source control-gear is 13.5 ± 0.1 volts for 12 V vehicle voltage system, or otherwise specified in the application for approval. (c) In the case of non-replaceable light source operated directly under vehicle voltage system conditions: All measurements on lighting units equipped with non- replaceable light sources (filament light sources and/or others) shall be made at 6.75 V, 13.5 V or 28.0 V or at other voltages according to the vehicle voltage system as specified by the applicant respectively. (d) In the case of light sources, replaceable or non-replaceable, being operated independently from vehicle supply voltage and fully controlled by the system, or, in the case of light sources supplied by a supply and operating device, the test voltages as specified above shall be applied to the input terminals of that device. The test laboratory may require from the manufacturer the supply and operating device or a special power supply needed to supply the light source(s).
Appears in 2 contracts
Sources: Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles, Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles