Low temperature test
Project introduction
The purpose of low temperature test is to test whether the specimen can be stored, manipulated and controlled in a long-term low temperature environment, and to determine the adaptability and durability of military and civilian equipment stored and working under low temperature conditions. Physical and chemical properties of materials at low temperatures. The standard has standardized requirements for pre-test treatment, initial test, sample installation, intermediate test, post-test treatment, heating rate, temperature cabinet load conditions, and the volume ratio of the object to be tested and the temperature cabinet.

Failure mode of specimens under low temperature conditions: parts and materials used in products may crack, embrittle, movable parts may get stuck, and characteristics may change at low temperatures.

Effects of low temperature
1. Make the material hard and brittle;
2. Increase the viscosity of the lubricant, reduce the flow ability, and reduce the lubrication effect;
3. Changes in the performance of electronic components;
4. Condensation and freezing of water;
5. Failure of seals;
6. Changes in mechanical structure caused by material shrinkage.
Scope of application
Low temperature test is mainly used for low temperature experiments and storage of special materials such as scientific research, storage of medical supplies, biological products, ocean products, electronic components, and chemical materials.
Method standard
GB/T2423.1-2008 "Environmental testing for electric and electronic products Part 2: Test methods Test A: Low temperature"
IEC 60068-2-1:2007 "Environmental testing for electric and electronic products Part 2: Test methods Test A: Low temperature"