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In recent years, the application scope of high and low temperature test chambers has expanded significantly, playing a crucial role in the environmental testing industry. Among the many factors that determine the performance of these chambers, there are three key indicators that ensure their reliability and accuracy. Here’s a detailed explanation of each:
1. **Stability**: This refers to the fluctuation of temperature at a specific point when the chamber reaches a steady state. The smaller the variation, the more accurate the internal environment. This is especially important when testing samples that require stable conditions, as large fluctuations can affect the validity of the results.
2. **Uniformity**: This measures the temperature difference between different points inside the chamber. For chambers up to 2 cubic meters, a 9-point measurement system is typically used. In larger chambers, 15 points are often tested to ensure even temperature distribution. A lower uniformity value indicates a more consistent and reliable internal environment.
3. **Airflow Velocity**: All the above parameters depend on proper airflow. High and low temperature test chambers use fans driven by motors to circulate air, ensuring even temperature distribution throughout the chamber. The standard airflow velocity is usually around 3.5 m/s. However, for specialized tests where strong airflow might interfere, custom solutions such as micro-hole air supply systems can be implemented to maintain accuracy without excessive wind.
These three factors—stability, uniformity, and airflow velocity—are essential for ensuring the precision and effectiveness of high and low temperature test chambers in various industries, including aerospace, automotive, and electronics. Understanding them helps users select the right equipment and interpret test results accurately.