sothermal Shock Tester for the test time requirements
Hot and cold impact test, also known as temperature impact test or high and low temperature impact test, is used to assess the product on the surrounding environment, the rapid changes in the adaptability of the design is the design of stereotypes of the identification test and the production stage of the routine test indispensable test , In some cases can also be used for environmental stress screening test. It can be said that the sothermal Shock Tester in the verification and improve the equipment used in the environmental adaptability of the frequency after the vibration and high and low temperature test.
sothermal Shock Tester can be used to test the composite material and material structure, in an instant and under high temperature and very low temperature can withstand the degree of continuous environment, that is, in the shortest possible time to test its thermal expansion and contraction caused by chemical changes Or physical damage, applicable to the object, including metal, plastic, rubber, electronics and other materials, can be used as a basis for product improvement or reference.
sothermal Shock Tester in the hot and cold impact test, the test time and the starting temperature are certain requirements, the next small series for everyone to introduce.
1, test time: 1) GJB150.5 provides a lower limit of 1h, that is, the temperature stability time is less than 1h, must have 1h; if more than 1h, then use the time more than 1h;
2) 810F method 503.4 does not specify the specific time or optional time level, the direct use of the product to achieve temperature stability of the time or product in the environment real exposure time.
3) GB2423.22 given 10min to 3h of the five time levels, with the use of table according to the constant temperature impact test machine measured product temperature stability time, with its closest time or optional time level, directly with its closest The time as the holding time.
2, the starting temperature: Although the general sothermal Shock Tester in the hot and cold impact test of the starting temperature is not mentioned or not mandatory, but this is the test must be considered when the problem, because it involves the test Is the end of the low temperature or high temperature state, which determines whether the need for drying the product, resulting in extended test time. If the test is finished after the low temperature standard test product is removed from the thermostatic impact tester (chamber), it should be restored under normal test atmospheric conditions until the sample reaches the temperature stable, which will inevitably cause condensation on the surface of the test sample Introduce the effect of temperature on the product. Thus changing the nature of the test.
In the GBJ 150 implementation guide, in order to eliminate this effect to avoid prolonged recovery to extend the test implementation time, the sample can be recovered in the 50 high temperature box, to be condensed dry and then at room temperature to achieve temperature stability. The implementation guide can be used to change the initial impact temperature, starting from the low temperature test, so that the test results at high temperatures to avoid the product out of sothermal Shock Tester to produce condensation. The two test methods subject the test sample to six extreme temperatures (three high temperature, three low temperature) and five times the temperature impact process, but the number of different impact direction is different, the two tests may reach the test effect is Basically the same, but the latter test method without adding drying time, shorten the hot and cold impact test time.
sothermal Shock Tester is divided into high temperature zone, low temperature area, test area three parts, the district of the box of a unique heat structure. Impact mode Application of air way to switch the temperature into the test area, do hot and cold impact test. High temperature impact or low temperature impact, the maximum time up to 9999 minutes, the maximum cycle up to 9999 times. The system can be used for automatic cycle impact or manual selective impact and can be set to two or three areas of the impact of cold and hot start. Cooling mining binary refrigeration system, cooling effect quickly, cooling method for the air-cooled or water-cooled two. Can be connected to the computer, the recorder is only optional. The use of color in English LCD touch control operation interface, easy to operate.