How does the high and low temperature alternating damp heat test box perform high and low temperature tests for road lights?
The high and low temperature alternating damp heat test box and the alternating damp heat box constant temperature and humidity test box are similar products, but the name is different. The high and low temperature alternating damp heat test box is a necessary test equipment in the fields of aviation, automobile, home appliances, scientific research, etc. To test and determine the parameters and performance of electrical, electronic and other products and materials after high temperature, low temperature, alternating humidity or constant temperature environment changes. The reference standards are: GB/T2423.1-2008 test A low temperature test method, GB/T2423.2-2008 test B high temperature test method, GB/T2423.3-2006 test Ca constant humidity test method, GB/T2423.4- 2008 Test Db Alternating Damp Heat Test Method
The ancient people used pine and cypress trees and red plum blossoms to describe a person’s backbone and character. With the development of science and technology, I am good at observing and found that the street lights of the three friends of cold today are none other than road lights. No matter the storm, the cold or the heat, they stand upright. where. In order to avoid common failures in various extreme natural environments, it is necessary to use a more severe environment to detect. Therefore, the lighting fixture manufacturing industry is also one of the popular customers of natural environment experimental equipment. Today, let’s talk about everyone’s What kind of cruel way will the high and low temperature alternating damp heat test box detect the characteristics of the road street lamp?
1. Experimental method
Put the test sample in a high and low temperature test box with a temperature setting of 25℃±5℃ and an air humidity of 55%±5%RH to check the appearance and structure, and refer to EN13201 for the amount of current according to the rated current and the rated frequency. -3 and EN13201-4 methods or similar Chinese and national standards to accurately measure the average light intensity of LED street lights, after heat, in a dark room, the light from the LED street lights is projected to the wall 2.0M away from the road street light body plan. Measure the layout of the road lighting intensity, accurately measure all the intersection angles of the wide sides of the rectangular frame, the length of the rectangular frame, and the total width of the rectangular frame with appropriate equipment, accurately measure the light intensity of the road street lights, and record each intersection angle, Data information of the total perimeter and total area.
2. Experimental standards
1. Put the test product at indoor temperature into the environmental test box without packaging and connecting to the power source, and then control the temperature of the high and low temperature alternating damp heat test box to the required (40±3)℃.
2. Make the temperature of the high and low temperature alternating damp heat test chamber reach the required experimental temperature.
3. At this temperature, the test product is connected to the power supply for 96h at the rated current and rated frequency. The delay time should start from when the temperature is stable.
4. Disconnect the switch power supply of the environmental test box, remove the test sample from the high and low temperature alternating damp heat test box, and repair it at room temperature for 2 hours.
3. Completed inspection
Check the appearance and structure of the experimental sample in a high and low temperature test box with a temperature of 25℃±5℃ and an air humidity of 55%±5%RH, and then the amount of current according to the rated current and the rated frequency depends on 1Accurately measure the luminous intensity layout diagram of the credential luminance meter of LED stand under the same accurate measurement standard.
Fourth, the resolution of experimental results
After the Haotian high and low temperature alternating damp heat test box is cooled, check it by looking at it. The appearance and structure of the LED street light should not change significantly before and after the experiment. The average light intensity of the subsequent inspection should be no less than the original inspection. 95% of the average light intensity. The error between the rectangular area of ​​the light intensity layout and the original inspection does not exceed 10%, the error between the length and total width of the random side of the rectangular box and the original inspection does not exceed 5%, and the intersection of the rectangular frame width and the original inspection does not exceed 5% .
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