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| ulv481x0p |
 Wysłany: Czw 3:02, 10 Mar 2011 Temat postu: Detection of light-emitting diode with a multimete |
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Test Method 1: the lamp connected to rated voltage 220V, allowed to work, start working down the time until each lamp is damaged, note the time of termination,coffee neon sign, when all the lights damage,light signs, find the average working time of light This is the life of the product. Test Method 2: based on the actual lighting products, to take the life of the aging accelerated methods (such as adding high-temperature, high pressure and frequent switching, etc.), according to the actual situation of the aging manufacturing special equipment.
G: aging test. New products into production, you must, respectively, in the number of trial production, and through small-batch trial production phase in volume, through the design of these tests can identify problems such as non-raw material and process issues. Here is a specific test method. Main testing equipment: the aging units, voltage regulator, voltage meter. Main test items: Batch production of raw materials.
The number of tests: 500 small scale, pilot 2000. Test methods; first raised the voltage 250V, turn off the power,LED sign, then the aging platform product installed,LED writing board, the switch three times, each time interval of 8 seconds, then off, then voltage to 170V, power observation, the last tune the voltage to 250V, 2 hours after the aging, the switch 3 times at intervals of 8 seconds, the end of aging. In the above testing process problems are found substandard products, in need of repair.
: With the growing number of tunnel projects, tunnel construction in modern transportation play an increasingly important role. Tunnel is a closed space, natural light can not light them, in order to ensure the continuity of driving and vehicle safety of human life, even during the day throughout the internal need of artificial lighting, tunnel lighting is an integral part of the tunnel construction. |
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