What Is The Damp Heat Test Chamber Used For?

Damp heat test chamber is used to do high temperature and high humidity test, can reproduce the damage caused by the extreme environment, is necessary test equipment in the solar industry.

What is the damp heat test

Damp heat test, we also call it colloquially "Double 85 test”, refers to the aging test of the test pieces in the environment set at the temperature of 85℃ and the relative humidity of 85%, which is a harsh environmental reliability test. The commonly used test time is 1000 hours, mainly to test the limit of what the product can withstand in the harsh environment of high temperature and humidity.

Test criteria for double 85 test

IEC 61215, IEC61646, IEC61108, IEC62688, UL1703, IEC61345.

The application of damp heat test in various industries

Damp heat test is widely used in LED and solar panel industry. Light source, module and accessories of LED need to be carried out double 85 test to reproduce the damage to high temperature and humidity environment on its components.

At the same time, this is also an environmental test condition commonly used in product life testing. For welded components, the double 85 test can test its ability to resist the long-term penetration of high temperature and moisture; for plastic components, the double 85 test can examine the mechanical properties of the material, yellow stain resistance, heat resistance, acid, alkali and salt resistance, especially the data comparison before and after the test can show this trend. Damp heat test has penetrated into all walks of life, in electronic, electrical, communication technology, instrument, vehicle, medical, plastic products, aerospace and other industries have been widely used.

Why it is necessary for solar panels

The solar panel is the core part of the solar power system, and also the most valuable part of the solar power system. Long-term operation of solar photovoltaic modules in outdoor environment, must be able to repeatedly withstand a variety of harsh climate conditions and other changeable environmental conditions, and ensure that in a very long rated life (usually required more than 20 years) its electrical performance does not occur serious decline. To ensure this, solar panels need to undergo a series of reliability tests. And one of the essential part of reliability test is the thermal performance test, whose items usually include the following three items:

Through the damp heat test to confirm that the product components can withstand high temperature and humidity after the subsequent negative temperature influence, as well as for the temperature and humidity change caused by fatigue and thermal failure, to confirm the component exposed to high temperature and thermal stress and can resist long-term moisture penetration ability.

Damp heat test chamber for double 85 test

As the test time of double 85 test is much longer than other tests, and long time high temperature and high humidity test requires high quality of test chamber, so for this test, the manufacturer has produced a targeted instrument - Damp Heat Test Chamber.

• Test procedure

• Product recommendation

• The internal material is 304 stainless steel, mirror surface, rust-proof to high and low temperature and moisture corrosion; this room is designed for panels up to 1.2 m. If your solar panel size is very large, you can also choose a walk-in test chamber, or you can choose a custom size.

• The temperature of the damp heat test chamber is set at a fixed value of 85℃, and the humidity is set at a fixed value of 85%. The test procedure has been designed in advance. The tester only needs to place the test piece in the workroom and turn on the equipment to run by itself.

• LIB pioneered the use of vertical sample holders to ensure uniform heat and moisture exposure on the front and back of the solar panels. Supporting racks for fix PV panels can be adjusted up and down to fit the various sizes of panels.

• A standard test hole, whose diameter is 50 mm, used to energize the test piece, is provided with a sleeve inside to prevent moisture from entering the insulation layer.

• The test chamber is prone to failure and risk when running for a long time. LIB damp heat test chamber is equipped with multiple safety protection and fault alarm devices to eliminate any risk. 

Parameter	Temperature Range	85 ℃
	Temperature Fluctuation	± 0.5 ℃
	Temperature Deviation	± 2.0 ℃
	Humidity Range	85% RH
	Humidity Deviation	± 2.5% RH
	Test Duration	1000 h
	Panel Size	1M*2M
	Panel Capacity	4 / 6 / 8 / 10 / 12 Pieces

 

If you want a more detailed test of the thermal performance of solar panels, you can also buy a separate climate chamber to perform Humidity-Freeze Test and Thermal Cycle Test. Both tests can be done on the same machine.

 

Xi 'an LIB Industry is a company specializing in environmental testing equipment. We have a huge R & D team and professional technical consultants, are committed to continuous innovation in technology and improve the process, manufacturing industry cutting-edge products. At LIB Industry, we can provide you with professional temperature and humidity test equipment. 

 

If you are interested in this damp heat test chamber, you can contact us at any time, we will provide you with the most professional test program and product introduction. Xi 'an LIB Industry, your most professional partner!