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The high and low temperature test chambers are designed to simulate real atmospheric conditions, allowing for the evaluation of how electrical, electronic products, and their components or materials perform under extreme temperature environments. These chambers are widely used in product development, improvement, quality assurance, and certification processes. They help determine a product's adaptability and reliability when exposed to high or low temperatures during transportation or actual use.
1. **Temperature Deviation**: This refers to the difference between the average temperature at the center of the workspace and the average temperature of other points within the same workspace at any given time after the system has stabilized. While the terminology remains consistent between old and new standards, the testing procedures have evolved. The updated standards are more practical and stringent, although the assessment duration is shorter.
2. **Temperature Fluctuation**: Also known as temperature stability, this indicator measures the difference between the highest and lowest temperatures recorded at any point in the workspace over a specific time interval. It’s important to note that "workspace" does not mean "laboratory." Instead, it refers to the internal space of the chamber, excluding 1/10 of the length of each side of the box wall. This parameter reflects the precision and control of the chamber’s temperature regulation system.
3. **Temperature Range**: This represents the maximum and minimum temperatures the chamber can achieve and maintain. It includes both the operational limits and the range where the equipment can function reliably over extended periods. Typical examples include extreme high and low temperatures, which are crucial for testing product endurance.
4. **Temperature Uniformity**: Previously referred to as "uniformity," the new standard calls it "temperature gradient." After the temperature stabilizes, this indicator measures the maximum difference between the average temperatures of any two points in the workspace at any given time. Unlike temperature deviation, this metric provides a more accurate reflection of the chamber’s core performance. As a result, some companies may choose to omit or downplay this specification in their documentation.
By understanding these key parameters, users can better evaluate the performance and reliability of temperature test chambers, ensuring they meet the required standards for their specific applications.
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