IEC 60068-2 Combined Condensation and Temperature and Humidity Test

In the IEC60068-2 specification, there are a total of five kinds of humid heat tests. In addition to the common 85℃/85%R.H., 40℃/93%R.H. fixed-point high temperature and high humidity, there are two more special tests [IEC60068-2-30, IEC60068-2-38], they are alternating wet and humid cycle and temperature and humidity combined cycle, so the test process will change temperature and humidity. Even multiple groups of program links and cycles applied in IC semiconductors, parts, equipment, etc. To simulate the outdoor condensation phenomenon, evaluate the material's ability to prevent water and gas diffusion, and accelerate the product's tolerance to deterioration, the five specifications are organized into a comparison table of the differences in the wet and heat test specifications, and the main points of the test are explained in detail for the wet and heat combined cycle test, and the test conditions and points of GJB in the wet and heat test are supplemented.

IEC60068-2-30 alternating humid heat cycle test

Note: This test uses the test technique of maintaining humidity and temperature alternations to make moisture permeate into the sample and produce condensation (condensation) on the surface of the product to confirm the adaptability of the component, equipment or other products in use, transportation and storage under the combination of high humidity and temperature and humidity cycle changes. This specification is also suitable for large test samples. If the equipment and the test process need to keep the power heating components for this test, the effect will be better than IEC60068-2-38, the high temperature used in this test has two (40 °C, 55 °C), the 40 °C is to meet most of the world's high temperature environment, while 55 °C meets all the world's high temperature environment, the test conditions are also divided into [cycle 1, cycle 2], In terms of severity, [Cycle 1] is higher than [Cycle 2].

Suitable for side products: components, equipment, various types of products to be tested

Test environment: the combination of high humidity and temperature cyclic changes produces condensation, and three kinds of environments can be tested [use, storage, transportation ([packaging is optional)]

Test stress: Breathing causes water vapor to invade

Whether power is available: Yes

Not suitable for: parts that are too light and too small

Test process and post-test inspection and observation: check the electrical changes after moisture [do not take out the intermediate inspection]

Test conditions: humidity: 95% R.H. warming] after [humidity maintain (25 + 3 ℃ low temperature - - high temperature 40 ℃ or 55 ℃)

Rising and cooling rate: heating (0.14℃/min), cooling (0.08~0.16℃/min)

Cycle 1: Where absorption and respiratory effects are important features, the test sample is more complex [humidity not less than 90%R.H]

Cycle 2: In the case of less obvious absorption and respiratory effects, the test sample is simpler [humidity is not less than 80%R.H.]

IEC60068-2-30 Alternating temperature and humid test (condensation test)

Note: For component types of parts products, a combination test method is used to accelerate the confirmation of the test sample's tolerance to degradation under high temperature, high humidity and low temperature conditions. This test method is different from the product defects caused by respiration [dew, moisture absorption] of IEC60068-2-30. The severity of this test is higher than that of other humid heat cycle tests, because there are more temperature changes and [respiration] during the test, and the cycle temperature range is larger [from 55℃ to 65℃]. The temperature variation rate of the temperature cycle also becomes faster [temperature rise :0.14℃/min becomes 0.38℃/min, 0.08℃/min becomes 1.16 ℃/min]. In addition, different from the general humid heat cycle, the low temperature cycle condition of -10℃ is increased, which accelerates the breathing rate and makes the water condensing in the gap of the substitute icing. Is the characteristic of this test specification, the test process allows power and load power test, but can not affect the test conditions (temperature and humidity fluctuation, rising and cooling rate) because of the heating of the side product after power, due to the change of temperature and humidity during the test process, but the top of the test chamber can not condenses water droplets to the side product.

Suitable for side products: components, metal components sealing, lead end sealing

Test environment: combination of high temperature, high humidity and low temperature conditions

Test stress: accelerated breathing + frozen water

Whether it can be powered on: it can be powered on and external electric load (it can not affect the conditions of the test chamber because of power heating)

Not applicable: Can not replace moist heat and alternating humid heat, this test is used to produce defects different from respiration

Test process and post-test inspection and observation: check the electrical changes after moisture [check under high humidity conditions and take out after test]

Test conditions: damp temperature and humidity cycle (25 ↔ 65 + 2 ° C / 93 + 3% r.h.) - low temperature cycle (25 ↔ 65 + 2 ℃ / 93 + 3% r.h. -- 10 + 2 ° C) X5 cycle = 10 cycle

Rising and cooling rate: heating (0.38℃/min), cooling (1.16 °C/min)

GJB150-o9 humid heat test

Description: The wet and heat test of GJB150-09 is to confirm the ability of equipment to withstand the influence of hot and humid atmosphere, suitable for equipment stored and used in hot and humid environment, equipment prone to high humidity storage or use, or equipment may have potential problems related to heat and humidity. Hot and humid locations may occur throughout the year in tropical areas, seasonal occurrences in mid-latitudes, and in equipment subjected to comprehensive changes in pressure, temperature and humidity. The specification specifically emphasizes 60 ° C /95%R.H. This high temperature and humidity does not occur in nature, nor does it simulate the humid and thermal effect after solar radiation, but it can find potential problems in the equipment. However, it is not possible to reproduce complex temperature and humidity environments, assess long-term effects, and reproduce humidity effects associated with low humidity environments.

 

IEEE1513 Temperature Cycle Test and Wet Freezing Test, Humidity Heat Test 2

Steps:

Both modules will perform 200 cycle temperature cycles between -40 °C and 60 °C or 50 cycle temperature cycles between -40 °C and 90 °C, as specified in ASTM E1171-99.

Note:

ASTM E1171-01: Test method for photoelectric modulus at Loop Temperature and humidity

Relative humidity does not need to be controlled.

The temperature variation should not exceed 100℃/ hour.

The residence time should be at least 10 minutes and the high and low temperature should be within the requirement of ±5℃

Requirements:

a. The module will be inspected for any obvious damage or degradation after the cycle test.

b. The module should not show any cracks or warps, and the sealing material should not delaminate.

c. If there is a selective electrical function test, the output power should be 90% or more under the same conditions of many original basic parameters

Added:

IEEE1513-4.1.1 Module representative or receiver test sample, if a complete module or receiver size is too large to fit into an existing environmental test chamber, the module representative or receiver test sample may be substituted for a full-size module or receiver.

These test samples should be specially assembled with a replacement receiver, as if containing a string of cells connected to a full-size receiver, the battery string should be long and include at least two bypass diodes, but in any case three cells are relatively few, which summarizes the inclusion of links with the replacement receiver terminal should be the same as the full module.

The replacement receiver shall include components representative of the other modules, including lens/lens housing, receiver/receiver housing, rear segment/rear segment lens, case and receiver connector, procedures A, B, and C will be tested.

Two full-size modules should be used for outdoor exposure test procedure D.

IEEE1513-5.8 Humidity freeze cycle test Humidity freeze cycle test

Receiver

Purpose:

To determine whether the receiving part is sufficient to resist corrosion damage and the ability of moisture expansion to expand the material molecules. In addition, frozen water vapor is the stress for determining the cause of failure

Procedure:

The samples after temperature cycling will be tested according to Table 3, and will be subjected to wet freezing test at 85 ℃ and -40 ℃, humidity 85%, and 20 cycles. According to ASTM E1171-99, the receiving end with large volume shall refer to 4.1.1

Requirements:

The receiving part shall meet the requirements of 5.7. Move out of the environment tank within 2 to 4 hours, and the receiving part should meet the requirements of the high-voltage insulation leakage test (see 5.4).

module

Purpose:

Determine whether the module has sufficient capacity to resist harmful corrosion or widening of material bonding differences

Procedure: Both modules will be subjected to wet freezing tests for 20 cycles, 4 or 10 cycles to 85 ° C as shown in ASTM E1171-99.

Please note that the maximum temperature of 60 ° C is lower than the wet freezing test section at the receiving end.

A complete high voltage insulation test (see 5.4) will be completed after a two to four hour cycle. Following the high voltage insulation test, the electrical performance test as described in 5.2 will be carried out. In large modules may also be completed, see 4.1.1.

Requirements:

a. The module will check for any obvious damage or degradation after the test, and record any.

b. The module should exhibit no cracking, warping, or severe corrosion. There should be no layers of sealing material.

c. The module shall pass the high voltage insulation test as described in IEEE1513-5.4.

If there is a selective electrical function test, the output power can reach 90% or more under the same conditions of many original basic parameters

IEEE1513-5.10 Damp heat test IEEE1513-5.10 Damp heat test

Objective: To evaluate the effect and ability of receiving end to withstand long-term moisture infiltration.

Procedure: The test receiver is tested in an environmental test chamber with 85%±5% relative humidity and 85 ° C ±2 ° C as described in ASTM E1171-99. This test should be completed in 1000 hours, but an additional 60 hours can be added to perform a high voltage insulation leakage test. The receiving part can be used for testing.

Requirements: The receiving end needs to leave the damp heat test chamber for 2 ~ 4 hours to pass the high voltage insulation leakage test (see 5.4) and pass the visual inspection (see 5.1). If there is a selective electrical function test, the output power should be 90% or more under the same conditions of many original basic parameters.

IEEE1513 Module test and inspection procedures

IEEE1513-5.1 Visual inspection procedure

Purpose: To establish the current visual status so that the receiving end can compare whether they pass each test and guarantee that they meet the requirements for further testing.

IEEE1513-5.2 Electrical performance test

Objective: To describe the electrical characteristics of the test module and the receiver and to determine their peak output power.

IEEE1513-5.3 Ground continuity test

Purpose: To verify electrical continuity between all exposed conductive components and the grounding module.

IEEE1513-5.4 Electrical isolation test (dry hi-po)

Purpose: To ensure that the electrical insulation between the circuit module and any external contact conductive part is sufficient to prevent corrosion and safeguard the safety of workers.

IEEE1513-5.5 Wet insulation resistance test

Purpose: To verify that moisture cannot penetrate the electronically active part of the receiving end, where it could cause corrosion, ground failure, or identify hazards for human safety.

IEEE1513-5.6 Water spray test

Objective: The field wet resistance test (FWRT) evaluates the electrical insulation of solar cell modules based on humidity operating conditions. This test simulates heavy rain or dew on its configuration and wiring to verify that moisture does not enter the array circuit used, which can increase corrosiveness, cause ground failures, and create electrical safety hazards for personnel or equipment.

IEEE1513-5.7 Thermal cycle test (Thermal cycle test)

Objective: To determine whether the receiving end can properly withstand the failure caused by the difference in thermal expansion of parts and joint materials.

IEEE1513-5.8 Humidity freeze cycle test

Objective: To determine whether the receiving part is sufficiently resistant to corrosion damage and the ability of moisture expansion to expand the material molecules. In addition, frozen water vapor is the stress for determining the cause of failure.

IEEE1513-5.9 Robustness of terminations test

Purpose: To ensure the wires and connectors, apply external forces on each part to confirm that they are strong enough to maintain normal handling procedures.

IEEE1513-5.10 Damp heat test (Damp heat test)

Objective: To evaluate the effect and ability of receiving end to withstand long-term moisture infiltration. I

EEE1513-5.11 Hail impact test

Objective: To determine whether any component, especially the condenser, can survive hail. IE

EE1513-5.12 Bypass diode thermal test (Bypass diode thermal test)

Objective: To evaluate the availability of sufficient thermal design and use of bypass diodes with relative long-term reliability to limit the adverse effects of module thermal shift diffusion.

IEEE1513-5.13 Hot-spot endurance test (Hot-Spot endurance test)

Objective: To assess the ability of modules to withstand periodic heat shifts over time, commonly associated with failure scenarios such as severely cracked or mismatched cell chips, single point open circuit failures, or uneven shadows (shaded portions). I

EEE1513-5.14 Outdoor exposure test (Outdoor exposure test)

Purpose: In order to preliminarily assess the capability of the module to withstand exposure to outdoor environments (including ultraviolet radiation), the reduced effectiveness of the product may not be detected by laboratory testing.

IEEE1513-5.15 Off-axis beam damage test

Purpose: To ensure that any part of the module is destroyed due to module deviation of the concentrated solar radiation beam.

 

Definition and Characteristics of UV Weathering Test Chamber

    Uv weathering test chamber is a professional equipment used to simulate and evaluate the resistance of materials to ultraviolet radiation and corresponding climatic conditions. Its core function is to simulate the effect of ultraviolet light on materials in the natural environment through artificially controlled ultraviolet radiation, temperature and humidity changes, so as to conduct comprehensive and systematic tests on the durability, color stability and physical properties of materials. In recent years, with the development of science and technology and the continuous improvement of material performance requirements, the application of UV weathering test chambers has become more and more extensive, covering plastics, coatings, rubber, textiles and other fields.

    The characteristics of the equipment are mainly reflected in its high efficiency and accuracy. First of all, the UV weathering test chamber uses a high-intensity ultraviolet lamp, which emits an ultraviolet spectrum close to sunlight, which can accurately simulate the lighting conditions in the real environment. Secondly, it has a real-time monitoring and control system, which can precisely regulate the internal temperature, humidity and UV intensity to ensure the stability of the test process and the reliability of the results. In addition, the internal material and structural design of the test chamber is also particularly important, which usually uses corrosion resistant and oxidation resistant materials to extend the service life of the equipment and improve the accuracy of the test.

    In addition, the application of UV weathering test chamber is not only limited to the aging detection of materials, but also can predict and improve the performance of materials, making manufacturers more forward-looking and scientific in material selection and product design. The use of this equipment to a large extent reduces the quality problems caused by the lack of weather resistance of the product and improves the market competitiveness of the product. Therefore, in the material research and development, the UV weathering test chamber can be described as an indispensable auxiliary tool, which helps enterprises quickly detect and optimize material properties to meet the changing needs of the market.

    In short, UV weathering test chamber, as an advanced testing technology, is leading the progress and innovation in the field of materials science. With the increasing demand for environmentally friendly materials and long-lasting products, the importance of such equipment will only become more prominent. Its scientific, reliable and efficient will help all walks of life to develop more high-quality products to cope with more unknown challenges in the future.