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EIA 364-31 Humidity Testing of Electrical Connectors and Sockets

EIA 364-31 evaluates materials used in connectors subjected to humidity conditions. As a certified environmental lab, we realize the importance of standard humidity compliance testing of electrical connectors. Meeting the environmental EIA 364-31 humidity testing requirements can be difficult. We understand the challenges and guide companies through the process.

Keystone Compliance provides the peace of mind that all of your needs will be met. We are in constant communication throughout the entire test process. Our pricing is competitive and we offer volume discounts. Keystone takes a consultative approach throughout the entire test program. When products do not meet the requirements, we assist with finding solutions.

Request a quote and find out first hand about our competitive pricing, timely process, and outstanding reputation. Have a question about our EIA 364-28 lab? Contact us or call (724) 657-9940 and we will determine the best course of action.

Summary of Humidity Standard Test Method EIA 364-31

As mentioned above, EIA 364-31 standard testing evaluates the properties of materials used in connectors. These are evaluated as they are influenced or deteriorated by the effects of high humidity and high heat conditions. The EIA 364 test is an accelerated environmental test, accomplished by the continuous exposure of the specimen in high humidity at various temperatures.

The EIA 364-31 test chamber and accessories are constructed and arranged to avoid condensate dripping on the test sample. The chamber is also trap-vented to the atmosphere to prevent the build up of total pressure. Furthermore, relative humidity is determined from the thermometer comparison method or an equivalent method approved by the procuring authority.

EIA 364-31 Humidity Compliance Testing Procedures

First, the test samples must consist of a plug, a receptacle, or a mated plug and receptacle as specified. The samples are wired using the contacts, wire type, size and sealing plugs. 

The EIA 364 standard compliance test procedure is broken into three different types. Type I, steady state, and type II and III, temperature cycling.

Type I: The EIA 364-31 test specimen is conditioned in a dry oven at a temperature of 50 degrees Celsius for 24 hours. Next, the connector is mounted in the test chamber. This is carried out so that the wires descend vertically into the connector or one connector half. Lastly, the specimen is placed in the chamber and subjected to relative humidity of 90 to 95% and a temperature of 40 degrees Celsius.

Type II: The specimen is subjected to dry oven conditions at a temperature of 50 degrees Celsius for 24 hours. The test specimen is then mounted by normal mounting means and positioned so that they do not contact each other. The specimen is subjected to 10 continuous cycles. Lastly, the test specimen is removed from the humidity chamber.

Type III: Type three EIA 364-31 temperature cycling is similar to type II temperature cycling. However, prior to starting the test, the item is conditioned  to the internal chamber temperature with uncontrolled humidity. Relative humidity is maintained at 85% and the internal chamber temperature is reduced after 16 hours.

Keystone Compliance Offers Expert EIA 364-31 Humidity Testing

Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling. Our team strives to give our customers more time and energy on product development instead of testing.

Have a question about our EIA 364-31 compliance testing services? Contact us or call (724) 657-9940 and we will determine the best course of action.

Interested in further information about EIA-364 testing? Follow the links below to learn more about the compliance testing services that we offer.