Brief description of high and low temperature test chamber products

Brief description of high and low temperature test chamber products

The high and low temperature test chamber products have the law of temperature change in the simulated atmospheric environment. It is mainly aimed at the adaptability test of electrical, electronic products, their components and other materials when transported and used in a comprehensive environment of high temperature and low temperature. For product design, improvement, identification and inspection and other links.

Temperature fluctuation

This indicator is also called temperature stability. After the control temperature is stable, within a given arbitrary time interval,

The difference between the maximum and minimum temperatures at any point in the workspace. There is a small difference here "workspace" is not "studio", it is a space about 1/10 of the length of each side of the chamber wall removed from the studio. This indicator evaluates the control technology of the product.

Temperature range

Refers to the extreme temperature that the product studio can withstand and/or reach. Usually contains the concept of constant control, which should be an extreme value that can operate stably for a relatively long time. Typical temperature ranges include extreme high and extreme low temperatures.

The general standard requires the index to be ≤1℃ or ±0.5℃.

Temperature uniformity

The old standard is called uniformity, and the new standard is called gradient. After the temperature is stabilized, the maximum value of the difference between the temperature averages 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' samples and plans deliberately hide this.

The general standard requires the index to be ≤2℃

Temperature deviation

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

The general standard requires the index to be ±2°C, and the pure high temperature test chamber above 200°C can meet the requirements of ±2% of the actual operating temperature in degrees Celsius (°C).