1.1 本试验方法描述了确定在用润滑剂中存在的燃料稀释量的方法。这是通过将润滑剂中的蒸汽吸入声表面波（SAW）传感器来实现的。燃油蒸汽将被声表面波传感器的聚合物涂层吸收。吸光度的大小与润滑剂中的燃油含量有关。 1.2 可通过试验方法测量的燃油稀释范围为0.1 % 至10.0 % 按燃料质量稀释。 1.3 本试验方法专门用于测定in的燃料稀释度- 服务润滑剂，包括新使用的润滑剂。该方法适用于柴油、汽油和喷气燃料的污染。 1.4 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。 1.5 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和健康实践，并确定监管限制的适用性。 参见第节 9 . ====意义和用途====== 5.1 本试验方法提供了一种快速、无准备的可靠现场测定燃料稀释度的方法。结果在大约1中获得 最小值。例如，在偏远的铁路车辆段，采用标准实验室方法测定燃料稀释度是不切实际的，如试验方法中所述 D7593 ，但关键是需要确定燃油是否污染了润滑剂。如果燃油污染了润滑剂，这对机器有很大的危害，通常会立即进行维修。 此外，燃油可能在机械润滑油路径中遇到的高温下点燃。

1.1 This test method describes a means for determining the amount of fuel dilution present in an in-service lubricant. This is achieved by drawing into a surface acoustic wave (SAW) sensor vapor from the lubricant. Fuel vapor will be absorbed by the SAW sensor’s polymer coating. The amount of absorbance is then related to fuel content in the lubricant. 1.2 The range of fuel dilution capable of being measured by the test method is from 0.1 % to 10.0 % by mass fuel dilution. 1.3 This test method is specifically tailored to determining the fuel dilution of in-service lubricants, including newly utilized lubricants. The method is applicable to contamination with diesel, gasoline, and jet fuels. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 and health practices and determine the applicability of regulatory limitations prior to use. See Section 9 . ====== Significance And Use ====== 5.1 This test method provides a means for a reliable field determination of fuel dilution that is quick and preparation-free. Results are obtained in approximately 1 min. Such a method is used, for example, at remote railroad depots where it is impractical to carry out a standard laboratory method for determination of fuel dilution, such as described in Test Method D7593 , but it is a critical need to determine if fuel has contaminated the lubricant. If fuel has contaminated the lubricant, this is significantly detrimental to the machinery and it is typically serviced immediately. Further, the fuel can ignite at the high temperatures encountered in machinery lubricant paths.