1.1 本指南涵盖了一种用于测量液体氧化或热稳定性的仪器，其温度范围为50℃ 摄氏度至375度 °C，存在空气、氧气、氮气或其他气体，流速为1.5 L/h至13 L/h，或在没有气流的情况下。可在存在或不存在水或可溶性或不溶性催化剂的情况下测量稳定性。释放的气体可以逸出、冷凝并收集，或冷凝并返回试验室。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本标准描述了一种仪器，该仪器具有使用多种测试条件对液体进行氧化或热稳定性测试所需的多功能性。它具有足够的灵活性，因此可以根据市场不断变化的需求选择新的测试条件。 4.2 以下ASTM标准试验方法中描述了使用该仪器的程序: D5763 , D5846 和 D6514 . 可能正在使用其他程序，但尚未开发为ASTM标准试验方法。

1.1 This guide covers an apparatus used to measure the oxidation or thermal stability of liquids by subjecting them to temperatures in the range from 50 °C to 375 °C in the presence of air, oxygen, nitrogen, or other gases at flow rates of 1.5 L/h to 13 L/h, or in the absence of gas flow. Stability may be measured in the presence or absence of water or soluble or insoluble catalysts. Gases evolved may be allowed to escape, condensed and collected, or condensed and returned to the test cell. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This standard describes an apparatus that provides the versatility required to conduct oxidation or thermal stability tests on liquids using a wide variety of test conditions. It is sufficiently flexible so that new test conditions can be chosen in response to the changing demands of the marketplace. 4.2 Procedures using this apparatus are described in the following ASTM standard test methods: D5763 , D5846 , and D6514 . Other procedures may be in use, but they have not been developed as ASTM standard test methods.