Basic knowledge points about high and low temperature test chambers

High and low temperature test chamber (also known as constant temperature and humidity test chamber): suitable for reliability testing of industrial products at high and low temperatures. Inspect the performance indicators of components and materials of electronic and electrical products, automobiles and motorcycles, aerospace, marine weapons, universities, research institutions, and other related products under high and low temperature (alternating) cyclic changes. The high and low temperature test chamber products produced by Guangdong Liyi Technology Co., Ltd. have a wide temperature control range, and their performance indicators meet the technical requirements of the national standard GB10592-89 for high and low temperature test chambers. They are suitable for conducting low temperature, high temperature tests, and constant temperature tests on products according to GB2423.1 and GB2423.2 "Environmental Test Methods for Electrical and Electronic Products - Test A: Low Temperature Test Method, Test B: High Temperature Test Method". The product complies with GB2423.1, GB2423.2, GJB150.3, GJB150.4, IEC, and MIL standards.

Basic information of high and low temperature test chamber:

The high and low temperature test chamber products have the ability to simulate temperature changes in atmospheric environments. Mainly aimed at adaptability testing of electrical and electronic products, as well as their components and other materials during transportation and use in high and low temperature comprehensive environments. Used in product design, improvement, identification, and inspection processes.

temperature fluctuation

The indicator of high and low temperature test chamber is also called temperature stability. After controlling the temperature stability, the difference between the highest and lowest temperatures at any point in the workspace within a given time interval. There is a small difference here, "workspace" is not "studio", but a space that is approximately 1/10 of the side length of the studio away from the box wall. This indicator assesses the control technology of the product.

temperature range

Refers to the maximum temperature that the product studio can tolerate and/or reach. Usually containing the concept of being able to control a constant, it should be an extreme value that can operate stably for a relatively long time. The general temperature range includes extreme high temperature and extreme low temperature. The general standard requirement for high and low temperature test chambers is ≤ 1 ℃ or ± 0.5 ℃.

temperature uniformity

The old standard is called uniformity, and the new standard is called gradient. After the temperature stabilizes, the maximum difference between the average temperatures of any two points in the workspace at any time interval. This indicator can better assess the core technology of the product than the temperature deviation indicator below, so many companies deliberately hide this item in their samples and plans. The general standard requirement index for high and low temperature test chambers is ≤ 2 ℃

Temperature deviation

After the temperature stabilizes, the difference between the average temperature at the center of the workspace and the average temperature at other points in the workspace at any time interval. Although the new and old standards have the same definition and name for this indicator, the testing has changed. The new standards are more practical and stricter, but the assessment time is shorter.

The general standard requirement for high and low temperature test chambers is ± 2 ℃, and pure high temperature test chambers above 200 ℃ can be tested according to the actual operating temperature requirement of ± 2% Celsius (℃)