1.1 本指南涵盖了条件数据趋势分析的实用技术。 1.2 该技术可用于提供数值试验结果的所有仪器。本指南专门针对从润滑剂样品中获得的数据编写。获得并与机器相关的其他数据也可用于确定机器状况。 1.3 本指南提供了一种评估润滑油在使用过程中变化的方法。对于不同系统类型中使用的特定润滑剂参数的限制，用户应参考实践 D4378 实践 D6224 ，或其他既定行业标准，如原始设备制造商的标准。指导 D7720 如果通过给定的其他参考不可用，可用于确定限制。 1.4 本指南不涉及控制上限或下限。这些限值由ASTM规范中定义的产品制造商提供，或两者都提供。控制上限和下限之间的范围应大于每个试验方法重复性系数内的范围。 参见实践 D3244页 , D6299 和 D6792 有关确保过程控制限制不违反统计基本原理的更多信息。 1.5 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。 1.6 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====== 5.1 本指南旨在为机械维护和监测人员提供进行趋势分析的指南，以帮助解释机械状况数据。

1.1 This guide covers practical techniques for condition data trend analysis. 1.2 The techniques may be utilized for all instrumentation that provides numerical test results. This guide is written specifically for data obtained from lubricant samples. Other data obtained and associated with the machine may also be used in determining the machine condition. 1.3 This guide provides a methodology for assessing changes in lubricant during service. For limits on a specific lubricant parameter used in different system types, users should refer to Practice D4378 , Practice D6224 , or other established industry criteria, such as from the OEM. Guide D7720 may be used to determine limits if unavailable through the other references given. 1.4 This guide does not address upper or lower control limits. These limits are provided by product manufacturers, defined in ASTM specifications, or both. The range between upper and lower control limits should be greater than the range within each test method’s repeatability coefficient. See Practices D3244 , D6299 , and D6792 for more information about ensuring that process control limits do not violate statistical fundamentals. 1.5 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. 1.6 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 ====== 5.1 This guide is intended to provide machinery maintenance and monitoring personnel with a guideline for performing trend analysis to aid in the interpretation of machinery condition data.