The automotive signalling device performs a radiation source radiation resistance test (equipment: xenon lamp weatherproof test chamber) to determine the performance of its plastic optical components and to improve existing materials. The following are the specific test steps:
First, preparation before the test
1. Xenon climate test chamber, the spectral energy distribution of the light source is similar to that of black body with temperature between 5500K~6000K.
2. Prepare 3 new plastic light fittings or samples of their materials.
Second, the test method
1. In the xenon lamp test chamber, the temperature of the blackboard at the same horizontal position as the sample is 50 ° ± 5 °
2. A corresponding filter should be placed between the light source and the sample to minimize the effects of radiation with wavelengths less than 295 nm and greater than 2500 nm.
3. The sample is rotated around the light source at a speed of 1 r/min to 5 r/min.
4. The irradiance of the sample should be 1200 W/m2, dry for 25 min, and cycled repeatedly until the end of the test. The conductivity of the distilled water for spraying at 23 ° C ± 2.5 ° C is less than 1 mS / m.
Third, the result is judged
1. After the test, the outer surface of the sample shall be free of cracks, scratches, chips and deformation.
2. When measuring three samples according to the method specified in Appendix D of GB 4599, the average value Δtm of the transmittance change Δt=(T2-T3)/T2 should be no more than 0.020.
Note: The above test contents are quoted in GB/T 10485-2007 "Basic Environmental Test for Exterior Lighting and Signaling Devices of Automobiles and Trailers, Article 15: Light Source Irradiation Test"
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