test project

 low temperature test

       reference standard

       GB/T 2423.1-2008; IEC 60068-2-1: 2007

       capabilities

       -70℃，1m×1m×1m

Low temperature test purpose

Determine the environmental adaptability of the product under low-temperature storage or low-temperature working conditions.

Low temperature test content:

Low temperature working test, low temperature storage test, low gas start or cold start test

Applicable occasions for low temperature test:

Low temperature test is mainly suitable for products that may be affected by low temperature environment. Low temperature environment test is used to stimulate inherent defects of products.

Test conditions for low temperature test:

Low temperature point, low temperature test time, temperature change rate.

Low temperature test time:

The low-temperature work test generally lasts for at least 2 hours, and storage lasts for 12 hours or 24 hours. The test duration is clearly stipulated according to the actual application environment of the product and relevant standards. This test time can be selected according to actual conditions.

The temperature point of the low-temperature working test is generally relatively loose than that of the low-temperature storage test. The working or start-up test is a performance test that requires power on and is relatively strict.

Low temperature environmental test belongs to the extreme stress environmental adaptability test type. Before conducting the test, it is necessary to clearly understand the low temperature test requirements of the user and relevant standards for the product.

Failure modes of specimens at low temperatures

Parts and materials used in products may experience cracks, embrittlement, stuck moving parts, and characteristic changes at low temperatures.

The main impacts of low temperature environment on equipment are:

A. Make the material hard and fragile;

b. As the viscosity of the lubricant increases, the flow rate decreases and the lubrication effect decreases;

c. Changes in the performance of electronic components;

d. Water condensation and freezing;

e. Seal failure;

f. Material shrinkage will cause changes in the mechanical structure.