UN ECE R98 tests cover a series of tests carried out in accordance with the relevant regulation for the evaluation of headlights of motor vehicles equipped with gas discharge light sources in the categories specified in the regulation.
ECE regulations define cross-border technical regulations for establishing approval or uniform approval procedures for motor vehicles and motor vehicle parts. Automated commercial vehicles are already fully eligible for approval only through appropriate individual measures in the country in which they will be used. What is missing is a set of rules at the international ECE level.
Regulation (UN/ECE) No. 98 of the United Nations Economic Commission for Europe — Covers the uniform provisions regarding the approval of motor vehicle headlights equipped with gas-discharge light sources and the tests applied accordingly.
Each sample must comply with the specifications specified in the regulation. Headlights must be constructed in such a way that they retain their prescribed photometric properties and remain in good working order in normal use despite the vibrations to which they may be subjected. Headlights shall have a device that allows them to be adjusted on the vehicle to comply with the rules applicable to them. Such a device need not be fitted to units where the reflector and diffuser lens cannot be separated, provided it is limited to vehicles where the headlight adjustment can be adjusted in other ways.
When a headlight providing a main low beam and a headlight providing a high beam, each equipped with its own light source(s), are installed to form a combined unit, the adjustment device must ensure that each optical system is duly adjusted individually. The same provision applies to headlights providing a front fog lamp beam and a high beam, as well as headlamps providing a main low beam and a front fog lamp beam, and headlamps providing these three beams.
Compliance with all these stated regulatory requirements must be verified by visual inspection and, if necessary, by a test device. Within the scope of the regulation, many mechanical, dynamic and environmental tests are carried out as well as measurements for the approval of the relevant equipment. For tests to be considered successful, test results must meet regulatory requirements.
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