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The Difference between Connector ( Housing & Wafer ) and Terminal
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The introduction of pin header of PCB
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When the connector fails, how to eliminate it
Selection of connector
Connector special metal plating
Three basic property of connector
What are the elements of a high-quality connector
Advantages of gold contacts over tin contacts
Testing in humid environment under temperature cycling conditions
Safety of household and similar electrical appliances
Smart home appliances high-performance connector products and solutions
How to choose automobile harness connector plug?
RAST connectors
What factors will affect the distribution of gold plating layer of connector
What is the development space of round Pin header needle?
Why board to board connectors need to be tested for salt spray
How CJT A2550 membrane switch connector can improve product quality
Parameter explanation of PH connectors
What is the function of SMT connector
What are the ways to check the car harness
Introduction of several common connectors
CJT connectors manufacturer analyzes how to select led connector
We learn about the specification hierarchy of connectors
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PCI-E series products of Changjiang connectors
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connector sales growth rapidly in the global market
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Testing in humid environment under temperature cycling conditions 

Testing in humid environment under temperature cycling conditions


The test in humid environment under temperature cycling condition is a dynamic test. Its fundamental difference from the steady-state test is that it cycles between two limits at high humidity. This test method is more commonly used to uncover or detect the following potential spoilage factors.

Determine the sensitivity of housing materials to thermal expansion, hygroscopicity, and dimensional stability.

The degree to which electrical connector system is affected by oxidation process in wet environment is determined by a limited method.

The extent to which contact surfaces are subject to abrasion (because moisture accelerates the oxidation process) during thermal cycling.

The process of oxidation in contact with material and wear debris or particles attached to its surface in damp conditions.


More stringent test conditions are commonly used for temperature/humidity testing


Condition 1 : testing under conditions that are controllable and shielded.

Conditions 2 , 3 : test conditions are not controlled but shielded.


The duration of the cycle test is usually random and the duration of the stay at high and low temperatures is approximately equal. If the equipment used in the test (DUT) has established a law of reaction to heat, the cycle may proceed at a faster rate. The limited requirement is that the DUT reaches thermal equilibrium in the expected time per cycle.

The traditional cycle used in special situations may be limited by the conditions required by the actual environment which is difficult to meet, because when the temperature is lower than 5℃ or higher than 100℃, the humidity does not exist, so the number of temperature rises may increase and the number of temperature drops will be reduced.

The method of durability testing may vary depending on the purpose of the test. Standard durability tests are as follows

1-48 to 96 hours: test in a steady wet environment.

2-240 hours: test in a humid environment under temperature cycling conditions.

3-500 to 1000 hours: test in a humid environment under temperature cycling conditions.

Among of them, test condition 1 is used for the evaluation of plastics, and test condition 2 is used for the evaluation of plastics and to determine whether there is a major catastrophic problem. Test condition 3 is used to determine whether the product under test is subject to mechanical failure over time (e.g. oxidation and/or abrasion corrosion in wet conditions). If it lasts less than 300 hours, it is thought that these temperature conditions can promote its failure over time.

Insulation resistance (IR) is used to evaluate the properties of plastic housing. Resistance (CRCR or LLCR) is used to evaluate the stability of contact surfaces and electrical properties.



Home  |  Detailed introduction of CJT pin header  |  How to choose the size of board to board connector  |  The Difference between Connector ( Housing & Wafer ) and Terminal  |  How to improve the product quality of wiring terminal  |  The introduction of pin header of PCB  |  What should we pay attention to when choosing a good connector manufacturer  |  When the connector fails, how to eliminate it  |  Selection of connector  |  Connector special metal plating  |  Three basic property of connector  |  What are the elements of a high-quality connector  |  Advantages of gold contacts over tin contacts  |  Testing in humid environment under temperature cycling conditions  |  Safety of household and similar electrical appliances  |  Smart home appliances high-performance connector products and solutions  |  How to choose automobile harness connector plug?  |  RAST connectors  |  What factors will affect the distribution of gold plating layer of connector  |  What is the development space of round Pin header needle?  |  Why board to board connectors need to be tested for salt spray  |  How CJT A2550 membrane switch connector can improve product quality  |  Parameter explanation of PH connectors  |  What is the function of SMT connector  |  What are the ways to check the car harness  |  Introduction of several common connectors  |  CJT connectors manufacturer analyzes how to select led connector  |  We learn about the specification hierarchy of connectors  |  INSIGHTS FROM CONNECTED MOBILITY  |  How to deal with connectors in different environments  |  PCI-E series products of Changjiang connectors  |  Safe use of connector and connection range of aviation plug  |  connector sales growth rapidly in the global market  |  Three basic property of connector  |  Show Exhibitors  |  Product Catalog  |  Original factory models  |  connectors knowledge  |  Good press-fit analysis  |  Connector Guide  |  UL/SGS Certificate download  |  Company news  |  Contact Us  |  Friendship link  |  Sitemap  |  Mobile Version
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