"Environmental testing" refers to the process of exposing products or materials to natural or artificial environmental conditions under specified parameters to evaluate their performance under potential storage, transportation, and usage conditions. Environmental testing can be categorized into three types: natural exposure testing, field testing, and artificial simulation testing. The first two types of testing are costly, time-consuming, and often lack repeatability and regularity. However, they provide a more accurate reflection of real-world usage conditions, making them the foundation for artificial simulation testing. Artificial simulation environmental testing is widely used in quality inspection. To ensure comparability and reproducibility of test results, standardized methods for basic environmental testing of products have been established.
Below are the environmental tests methods that can achieve by using environmental test chamber:
(1) High and Low Temperature Testing: Used to assess or determine the adaptability of products to storage and/or use under high and low temperature conditions.
(2) Thermal Shock Testing: Determines the adaptability of products to single or multiple temperature changes and the structural integrity under such conditions.
(3) Damp Heat Testing: Primarily used to evaluate the adaptability of products to damp heat conditions (with or without condensation), particularly focusing on changes in electrical and mechanical performance. It can also assess the product's resistance to certain types of corrosion.
Constant Damp Heat Testing: Typically used for products where moisture absorption or adsorption is the primary mechanism, without significant respiration effects. This test evaluates whether the product can maintain its required electrical and mechanical performance under high temperature and humidity conditions, or whether sealing and insulating materials provide adequate protection.
Cyclic Damp Heat Testing: An accelerated environmental test to determine the product's adaptability to cyclic temperature and humidity changes, often resulting in surface condensation. This test leverages the product's "breathing" effect due to temperature and humidity changes to alter internal moisture levels. The product undergoes cycles of heating, high temperature, cooling, and low temperature in a cyclic damp heat chamber, repeated as per technical specifications.
Room Temperature Damp Heat Testing: Conducted under standard temperature and high relative humidity conditions.
(4) Corrosion Testing: Evaluates the product's resistance to saltwater or industrial atmospheric corrosion, widely used in electrical, electronic, light industry, and metal material products. Corrosion testing includes atmospheric exposure corrosion testing and artificial accelerated corrosion testing. To shorten the testing period, artificial accelerated corrosion testing, such as neutral salt spray testing, is commonly used. Salt spray testing primarily assesses the corrosion resistance of protective decorative coatings in salt-laden environments and evaluates the quality of various coatings.
(5) Mold Testing: Products stored or used in high temperature and humidity environments for extended periods may develop mold on their surfaces. Mold hyphae can absorb moisture and secrete organic acids, degrading insulation properties, reducing strength, impairing optical properties of glass, accelerating metal corrosion, and deteriorating product appearance, often accompanied by unpleasant odors. Mold testing evaluates the extent of mold growth and its impact on product performance and usability.
(6) Sealing Testing: Determines the product's ability to prevent the ingress of dust, gases, and liquids. Sealing can be understood as the protective capability of the product's enclosure. International standards for electrical and electronic product enclosures include two categories: protection against solid particles (e.g., dust) and protection against liquids and gases. Dust testing checks the sealing performance and operational reliability of products in sandy or dusty environments. Gas and liquid sealing testing evaluates the product's ability to prevent leakage under conditions more severe than normal operating conditions.
(7) Vibration Testing: Assesses the product's adaptability to sinusoidal or random vibrations and evaluates structural integrity. The product is fixed on a vibration test table and subjected to vibrations along three mutually perpendicular axes.
(8) Aging Testing: Evaluates the resistance of polymer material products to environmental conditions. Depending on the environmental conditions, aging tests include atmospheric aging, thermal aging, and ozone aging tests.
Atmospheric Aging Testing: Involves exposing samples to outdoor atmospheric conditions for a specified period, observing performance changes, and evaluating weather resistance. Testing should be conducted in outdoor exposure sites that represent the most severe conditions of a particular climate or approximate actual application conditions.
Thermal Aging Testing: Involves placing samples in a thermal aging chamber for a specified period, then removing and testing their performance under defined environmental conditions, comparing results to pre-test performance.
(9) Transport Packaging Testing: Products entering the distribution chain often require transport packaging, especially precision machinery, instruments, household appliances, chemicals, agricultural products, pharmaceuticals, and food. Transport packaging testing evaluates the packaging's ability to withstand dynamic pressure, impact, vibration, friction, temperature, and humidity changes, as well as its protective capability for the contents.
These standardized testing methods ensure that products can withstand various environmental stresses, providing reliable performance and durability in real-world applications.
Road LED Text Reliability Test
Environmental resistance test:
Vibration test, transportation package drop test, temperature cycle test, temperature and humidity test, impact test, waterproof test
Durability test:
High and low temperature preservation test, continuous switch operation test, continuous action test
LED display reliability test conditions finishing:
Vibration test: three-axis (XYZ) vibration, 10 minutes each, 10 ~ 35 ~ 10Hz sine wave, 300 ~ 1200 times/min, 3 minutes per cycle, vibration Fu 2mm
Vibration tightening test: vibration + temperature (-10 ~ 60℃)+ voltage + load
Drop test for transport packaging: Drop material slurry (at least 12mm thick), height depends on the purpose of use
Temperature cycle:
a. No boot test: 60℃/6 hours ← Rising and cooling for 30 minutes →-10℃/6 hours, 2cycle
b. Boot test: 60℃/4 hours ← Rising and cooling 30 minutes →0℃/6 hours, 2cycle, power supply without packaging and load
Temperature and humidity test:
No power test: 60℃/95%R.H./48 hours
Boot test: 60℃/95%R.H./24 hours/no packaging power supply load
Impact test: impact distance 3m, slope 15 degrees, six sides
Waterproof test: height 30 cm, 10 liters /min spray Angle 60 degrees, spraying position: front and back up, spraying range 1 square meter, spraying time 1 minute
Humidity test: 40℃/90%R.H./8 hours ←→25℃/65%R.H./16 hours, 10cycle)
High and low temperature preservation test: 60℃/95%R.H./72 hours →10℃/72 hours
Continuous switch action test:
Complete the switch within one second, shut down for at least three seconds, 2000 times, 45℃/80%R.H.
Continuous action test: 40℃/85%R.H./72 hours/power on
LED Street Lamp Test Specification
LED street lights are currently one of the key implementation methods to save energy and reduce carbon, all countries in the world have been in full swing to replace the original traditional street lights with LED street lights, and the new street is directly limited to the use of LED street lights to save energy. At present, the world LED street lamp market size of about 80 million, LED lamp light source whether it is heat, service life, output spectrum, output illuminance, material characteristics, are different from traditional mercury lamp or high-pressure sodium lamp. The test conditions and test methods of LED street lights are different from traditional lamps. Lab Companion collected the reliability test methods related to LED street lights at present and provide you with reference to help you understanding the related tests about LED.
LED street lamp test specification abbreviation:
LED street lamp test standard specification, LED street lamp test method technical specification, LED street lamp standard and test method, night landscape engineering semiconductor lighting device components product technical specification, semiconductor lighting night landscape engineering construction quality acceptance technical specification, IEC 61347LED power supply safety regulation
LED street lamp test specification conditions:
CJJ45-2006 Urban road lighting design standard, UL1598 lamps safety standard, UL48 wire and cable safety standard, UL8750 light-emitting diode safety standard, CNS13089 light-emitting diode large lamp durability Test - pre-burning test - outdoor, Waterproof Test: IP65, American Standard for LED lamps, EN 60598-1, EN 60598-2 Street lamp test
LED large lamp quality certification test project:
Temperature cycle, temperature and humidity cycle, high temperature preservation, moisture resistance, vibration, shock, continuous power, salt water spray, acceleration, solder heat resistance, solder adhesion, terminal strength, natural drop, dust test
LED large lamp quality certification test conditions:
Temperature cycle: 125℃(30min)←R.T.(5min)→-65℃(30min)/5cycle
LED street lamp (light-emitting diode outdoor display with large lights) failure determination:
a. The axis light is lower than the residual rating of 50%
b. Forward voltage is greater than 20% of the rated value
c. Reverse current greater than 100% of the rated value
d. The half height wave length and half power Angle of the light exceed the limited maximum value or the limited minimum value meet the above conditions, and determine the failure of the LED street lamp
Note: The luminous efficiency of LED street lamp is recommended to be at least 45lm/W or above (the luminous efficiency of LED light source must be about 70 ~ 80lm/W)
High temperature storage: maximum storage temperature 1000 hours [special level 3000 hours]
Moisture resistance: 60℃/90%R.H./1000 hours [characteristic level 2000 hours]/ applying bias
Brine spray: 35℃/ concentration 5%/18 hours [24 hours special level]
Continuous power: maximum forward current 1000 hours
Natural fall: Fall height 75cm/ fall times 3 times/fall material smooth maple wood
Dust test: continuous 360 hours of 50℃ ring temperature test
Vibration: 100 ~ 2000Hz, 196m/s^2, 48 hours
Impact: Grade F[Acceleration 14700m/s^2, pulse amplitude 0.5ms, six directions, three times in each direction]
Equal acceleration: Acceleration is applied in all directions (class D: 196000 m/s^2) for 1 minute
Solder heat resistance: 260℃/10 seconds /1 time
Solder adhesion: 250℃/5 seconds
Terminal strength
LED large lamp batch quality test project:
Terminal strength, solder heat resistance, temperature cycle, moisture resistance, continuous power, high temperature storage
LED large lamp batch quality test conditions:
Moisture resistance: 60℃/90%R.H./168 hours (no failure)/500 hours (one failure allowed)[test number 10 / apply bias]
Continuous power on: maximum forward current /168 hours (no failure)/500 hours (one failure allowed)[test number 10]
High temperature storage: maximum storage temperature /168 hours (no failure)500 hours (one failure allowed)[test number 10]
Solder heat resistance: 260℃/10 seconds /1 time
Solder adhesion: 250℃/5 seconds
LED large lamp regular quality test project:
Vibration, shock, acceleration, moisture resistance, continuous power, high temperature preservation
Regular quality test conditions for LED large lights:
Moisture resistance: 60℃/90%R.H./1000 hours
Continuous power: maximum forward current /1000 hours
High temperature storage: Maximum storage temperature /1000 hours
Vibration: 100 ~ 2000Hz, 196m/s^2, 48 hours
Impact: Grade F[Acceleration 14700m/s^2, pulse amplitude 0.5ms, six directions, three times in each direction]
Equal acceleration: Acceleration is applied in all directions (class D: 196000 m/s^2) for 1 minute
LED large lamp screening test project:
Acceleration test, temperature cycle, high temperature preservation, pre-burning test
LED large light screening test conditions:
Constant acceleration test: Apply acceleration (grade D: 196000 m/s^2) in each direction for 1 minute
Temperature cycle: 85℃(30min)←R.T.(5min)→-40℃(30min)/5cycle
Pre-firing test: temperature (maximum rated temperature)/ current (maximum rated forward current)96 hours
High temperature storage: 85℃/72 ~ 1000 hours
LED lamp life test:
More than 1000 hours of Life Test (Life Test), light attenuation < 3% [withered light]
More than 15,000 hours of Life Test (Life Test), light attenuation < 8%
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