1.1 本试验方法适用于对柴油曲轴箱发动机油以及其他类型发动机油中的烟灰进行现场监测，因为燃油燃烧不完全导致窜气，烟灰可能会污染润滑剂。它适用于烟灰含量高达12的机油 % 按质量计。 1.2 本试验方法使用基于过滤器的红外技术来监测在用石油和碳氢化合物润滑油中因正常机械操作而产生的烟尘积聚。发动机机油中的烟灰含量会上升，因为由于漏气造成的废气再循环，烟灰颗粒会污染机油。该测试方法旨在对在用碳氢化合物润滑油中的烟灰进行快速、简单和现场可用的光谱检查，目的是根据测量油中烟灰的水平来帮助诊断机器的运行状况。 1.3 本试验方法仅用于现场试验，应按现场试验方法处理。关键应用应使用基于实验室的方法，如测试方法中描述的热重量分析（TGA） D5967 ，附件A4。 1.4 本试验方法介绍了使用固定滤光片红外仪器测量在役油和润滑油样品中烟尘的光谱数据采集。还描述了根据制备的烟尘标准进行的校准。 注1: 本试验方法的目的不是为任何机械建立或建议正常、警示、警告或警报限值。应结合机械制造商和维护小组的建议和指导制定此类限值。 1.5 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 该测试方法提供了一种简单的基于现场的技术，用于监测与工业和军队使用的内燃机、机械和设备相关的在役润滑剂中的烟灰。 关键应用应使用基于实验室的测试方法，如测试方法中描述的热重量分析（TGA） D5967 ，附件A4。红外光谱法是一种公认的实验室方法，用于评估润滑剂中的烟尘水平。该测试方法可用于监测润滑剂中的烟灰积聚，并可指示烟灰是否积聚到可能显著降低机油性能的程度。烟尘含量高会影响润滑剂性能，并导致滤清器和油道堵塞。烟尘浓度应与实践中描述的其他条件监测试验的数据一起考虑 2012年2月 以确定是否应更换机油以最大限度地减少机械磨损或故障，或两者兼而有之。

1.1 This test method pertains to field-based monitoring of soot in diesel crankcase engine oils as well as in other types of engine oils where soot may contaminate the lubricant as a result of a blow-by due to incomplete combustion of fuels. It is applicable to oils having soot levels of up to 12 % by mass. 1.2 This test method uses filter-based infrared technology for monitoring of soot build-up in in-service petroleum and hydrocarbon-based lubricants as a result of normal machinery operation. Soot levels in engine oils rise as soot particles contaminate the oil as a result of exhaust gas recirculation from blow-by. This test method is designed as a fast, simple, and field-capable spectroscopic check for soot in in-service hydrocarbon-based lubricants with the objective of helping diagnose the operational condition of the machine based on measuring the level of soot in the oil. 1.3 This test method is intended as a field test only, and should be treated as such. Critical applications should use laboratory based methods, such as Thermal Gravimetric Analysis (TGA) described in Test Method D5967 , Annex A4. 1.4 Acquisition of spectral data for measuring soot in in-service oil and lubricant samples with the use of a fixed-filter IR instrument is described in this test method. Calibration against prepared soot standards is also described. Note 1: It is not the intent of this test method to establish or recommend normal, cautionary, warning, or alert limits for any machinery. Such limits should be established in conjunction with advice and guidance from the machinery manufacturer and maintenance group. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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 test method provides a simple field-based technique for condition monitoring of soot in in-service lubricants associated with combustion engines, machinery, and equipment used in industry and by the military. Critical applications should use laboratory-based test methods, such as Thermal Gravimetric Analysis (TGA) described in Test Method D5967 , Annex A4. Infrared spectroscopy is a well-established laboratory method for evaluating soot levels in lubricants. This test method can be used to monitor soot build-up in lubricants and can indicate whether soot has accumulated to an extent that could significantly degrade the performance of the oil. High soot content can compromise lubricant performance and cause filter and oil passage blockage. Soot concentration should be considered in conjunction with data from other condition monitoring tests as described in Practice E2412 to determine whether the oil should be replaced to minimize machinery wear or failure, or both.