环境试验 - 第2-2部分：试验 - 试验B：干热

[中文适用范围]： IEC 60068-2-2:2025 规定了适用于非散热和散热样品的干热温度测试方法，以确定组件、设备或其他物品在高温环境下使用、运输或储存的能力。本文件适用于在测试过程中通常能实现温度稳定的带电和不带电样品。样品可以以包装状态（用于模拟运输和储存）或未包装状态（用于模拟使用）进行测试。本文件不规定用于确定温度变化对样品影响的测试方法。第六版取消并替代了2007年发布的第五版。本版为技术修订版，与前一版相比，包括以下重大技术变更：a) 对引言和适用范围进行了修订；b) 增加了用于澄清的新的图示和符号；c) 明确了测试程序，以确定测试舱内高或低空气速度；d) 明确了对样品周围、表面或内部测量点的要求；e) 重新引入了用于高温空气速度测试（测试Bd和测试Be）时校正条件温度的标图程序；f) 修订了测试温度的公差；g) 修订了相关规范和测试报告的标准化要求；h) 增加了测试程序的优缺点。 [外文原描述]： IEC 60068-2-2:2025 specifies dry heat temperature tests that are applicable to non-heat-dissipating and heat-dissipating specimens, to determine the ability of components, equipment or other articles to be used, transported or stored at high temperature. This document is applicable to energized as well as non-energized specimens that normally achieve temperature stability during the test. The specimens can be subject to test in packed condition (to simulate transportation and storage) or in unpacked condition (to simulate use). This document does not specify tests to determine the impact of temperature changes on specimens. This sixth edition cancels and replaces the fifth edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) revision of the introduction and scope; b) inclusion of new figures and symbols for clarification purposes; c) clarification of the test procedure for ascertaining high or low air velocity in the test chamber; d) clarification of the requirements for measuring points around, on or in specimens; e) reintroduction of the nomogram procedure for the correction of the conditioning temperature when testing with high air velocity (Test Bd and Test Be); f) revision of the temperature tolerances of the test; g) revision of standardized requirements for the relevant specification and test report; h) inclusion of the advantages and disadvantages of the testing procedures.