Document ID: chunk:federal_register_of_legislation:F2023C00158:front:0:p16
Version: federal_register_of_legislation:F2023C00158
Segment Type: other
Provision Reference: 
Character Range: 42056–44975

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 subjected to a water spray as follows:

       1.2.1.2.1. Device openings

       All drain holes and other openings shall remain open.  Drain wicks, when used, shall be tested in the device.

       1.2.1.2.2. Rotational speed

       The device shall be rotated about its vertical axis at a rate of 4.0 +/- 0.5min-1.

       1.2.1.2.3. If the retro-reflector is reciprocally incorporated with signalling or lighting functions, these functions shall be operated at design voltage according to a cycle of 5min ON (in flashing mode, where appropriate), 55min OFF.

       1.2.1.2.4. Test duration

       The water spray test shall last 12

       h (12 cycles of 5/55min).

       1.2.1.2.5. Drain period

       The rotation and the water spray shall be turned OFF and the device allowed to drain for 1h with the cabinet door closed.

       1.2.1.2.6. Sample evaluation

       Upon completion of the drain period.  The interior of the device shall be observed for moisture accumulation.  No standing pool of water shall be allowed to be formed, or which can be formed by tapping or tilting the device.  The CIL shall be measured according to the method specified in annex 4 paragraph 3.2. after having dried the exterior of the device with a dry cotton cloth.

       1.2.2. Dust exposure test

       This test evaluates the ability of the sample device to resist dust penetration which could significantly affect the photometric output of the retro-reflector.

       1.2.2.1. Dust exposure test equipment

       The following equipment shall be used to test for dust exposure:

       1.2.2.1.1. Dust exposure test chamber

       The interior of the test chamber shall be cubical in shape in size 0.9 to 1.5m per side. The bottom may be "hopper shaped" to aid in collecting the dust.  The internal chamber volume, not including a "hopper shaped" bottom shall be 2m3 maximum and shall be charged with 3 to 5kg of the test dust.  The chamber shall have the capability of agitating the test dust by means of compressed air or blower fans in such a way that the dust is diffused throughout the chamber.

       1.2.2.1.2. The dust

       The test dust used shall be fine powdered cement in accordance with standard ASTM C 150-84.[*/]

       1.2.2.2. Dust exposure test procedure

       A sample device, mounted on a test fixture, with the initial CIL measured and recorded, shall be exposed to dust as follows:

       1.2.2.2.1. Device openings

       All drain holes and other openings shall remain open.  Drain wicks, when used, shall be tested in the device.

       1.2.2.2.2. Dust exposure

       The mounted device shall be placed in the dust chamber no