Traffic lights under cryogenic environment test

Traffic lights factory cryogenic launch experiment laboratory equipment: experiment device should agree with GB/T 2423. 1. Experimental methods: traffic signal controller manufacturers according to the normal working way pick up any type of light. According to the signal of the nominal heat resistance level, experimental according to A,

traffic lights manufacturers are starting to low-temperature laboratory experimental equipment: laboratory equipment should comply with the national standard 2423. 1. Experimental methods: traffic signal lamp manufacturers according to the normal work mode connection any type of light. According to the signal of the nominal working temperature tolerance levels, according to the experiment class a and class b. Temperature tolerance class a traffic signal: the connection at the end of the signal into no power of low temperature test chamber, and adjusted according to the following procedure to test chamber: 1. Manganese is added when 25 ℃; Under 2 ℃ for 30 minutes; ； 2. Cool to - More than 40 ℃. Under 3 ℃ after 8 hours of electricity. Check the appearance, structure and function. Heat-resistant serie b traffic signal: traffic signals will be connected into no power in the low temperature test chamber, and adjusted according to the following procedure to test chamber: 1, the two railway traffic lights above 5 ℃; Under 2 ℃ for 30 minutes; ； 2. Cool to - More than 20 ℃; Under 3 ℃ after 8 hours of electricity. Check the appearance, structure and function.