GB T10485 test requirements for high and low temperature alternating test chamber
The GB/T10485 standard mentions the thermal cycle test of the headlights and the front fog lamps to determine the thermal cycle test resistance of the headlights and front fog lamps. The equipment used was a high-low temperature alternating test chamber, and the test was carried out with two headlights and a front fog lamp. The test conditions are as follows: 1. The light distribution performance should be checked before and after the test. 2. Before placing the sample, the airflow in the box is 1m/s~2m/s. 3. The distance between the sample and the wall of the box should be greater than 200mm. The following are the test methods:
1. First install the specimen on the test bracket. When placed in the test chamber, its reference axis is parallel to the main direction of the airflow.
2. The sample shall be subjected to 5 high and low temperature cycle tests, each cycle lasting 8 hours, the temperature conversion rate is 0.6 °C / min ~ 4.0 ° C / min; the cycle start temperature is 20 ° C; low temperature -30 ° C high temperature 60 ° C, at least to maintain 2h; test voltage 13.2V ± 0.1V (nominal voltage 24V is 28.0 ± 0.1V)
3. After the test, the sample was taken out from the box and stored at room temperature of 23 ° C ± 5 ° C and relative humidity of 30% ~ 60% for 1 h.
Judgment of test results: visual inspection of the sample shall be free of rust, mirrors and light distribution mirrors shall be free from deformation and non-foaming, and the light distribution performance shall comply with the relevant standards.
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