What Is The Purpose Of Environmental Test?

1. Explore and determine the impact of single or multiple environmental factors on the product, and assess the environmental adaptability of the product;

2. As one of the type test items of the product, or the acceptance test of the product, to see whether it meets the specified environmental requirements and whether the product is qualified, as the decision basis for product acceptance or rejection.

3. Carry out product environmental stress screening (ESS) tests to screen out unqualified or potentially defective products, thereby improving product reliability. Environmental test can be divided into field test and laboratory test: (1) Laboratory test: generally carried out in the laboratory, also called artificial simulation test. experiment in this environment. The artificial simulation test is similar to the atmospheric exposure test and has acceleration, which can greatly shorten the test time, and the application of environmental stress and load conditions can be strictly controlled within the tolerance range to ensure that all tests are carried out under controlled conditions. Therefore, the reproducibility is good and comparability is good. The disadvantage is that it is limited by the equipment. Generally, some products with smaller volume and lighter weight are tested, and sometimes the simulation of very real comprehensive environment is poor. (2) Field test can be divided into natural exposure test and field test: ① Natural exposure test: Expose products or materials to natural climate conditions to assess their environmental adaptability. Test samples generally do not work, and the test time is very long. It often takes many years to evaluate the results. This kind of test is accurate, strict, real, and its conclusions are comparative. This kind of test is mostly used by countries or large industrial groups.

Although the environmental test and the reliability test are closely related, they are completely different in the test purpose, the amount of environmental stress used, the selection criteria of the environmental force value, the test type, the test time, and the test termination criterion.