Document ID: chunk:federal_register_of_legislation:F2023C00158:front:0:p15
Version: federal_register_of_legislation:F2023C00158
Segment Type: other
Provision Reference: 
Character Range: 39427–42305

EXTERNAL AGENTS

       1. Resistance to water and dirt penetration

       1.1. Water submersion test

       1.1.1. Retro-reflecting devices whether part of a lamp or not, shall be stripped of all removable parts and immersed for 10 minutes in water at a temperature of 50 degrees +/-5 degreesC, the highest point of the upper part of the illuminating surface being 20mm below the surface of the water. This test shall be repeated after turning the retro- reflecting device through 180 degrees, so that the illuminating surface is at the bottom and the rear face is covered by about 20mm of water. These optical units shall then be immediately immersed in the same conditions in water at a temperature of 25 degrees +/ - 5 degreesC.

       1.1.2. No water shall penetrate to the reflecting surface of the retro-reflecting optical unit.  If visual inspection clearly reveals the presence of water, the device shall not be considered to have passed the test.

       1.1.3. If visual inspection does not reveal the presence of water or in case of doubt, the CIL shall be measured by the method described in annex 4, paragraph 3.2., or annex 14, paragraph 4.2., the retro-reflecting device being first lightly shaken to remove excess water from the outside.

       1.2. Alternative test procedure for Class IB devices

       As an alternative, at the request of the manufacturer, the following test (moisture and dust test) shall be applied instead of the submersion-test specified in paragraph 1.1. above.

       1.2.1. Moisture test

       The test evaluates the ability of the sample device to resist moisture penetration from a water spray and determines the drainage capability of those devices with drain holes or other exposed openings in the device.

       1.2.1.1. Water spray test equipment

       A water spray cabinet with the following characteristics shall be used:

       1.2.1.1.1. Cabinet

       The cabinet shall be equipped with a nozzle(s) which provides a solid cone water spray of sufficient angle to completely cover the sample device.  The centreline of the nozzle(s) shall be directed downward at an angle of 45 degrees +/- 5 degrees to the vertical axis of a rotating test platform.

       1.2.1.1.2. Rotating test platform

       The rotating test platform shall have a minimum diameter of 140mm and rotate about a vertical axis in the centre of the cabinet.

       1.2.1.1.3. Precipitation rate

       The precipitation rate of the water spray at the device shall be 2.5 (+ 1.6/-0) mm/min as measured with a vertical cylindrical collector centred on the vertical axis of the rotating test platform.  The height of the collector shall be 100mm and the inside diameter shall be a minimum of 140mm.

       1.2.1.2. Water spray test procedure

       A sample device mounted on a test fixture, with initial CIL measured and recorded shall be