1.1 本规程涵盖了使用FT-IR光谱仪在役油况监测的仪器设置和操作参数，用于直接趋势分析和差分趋势分析方法。 1.2 本规程描述了如何使用标准透射池获取在役油样的FT-IR光谱，并确定最大允许光谱噪声水平。 1.3 本规程中未对单个在役油状况监测部件和参数的测量和集成参数进行描述，而是在其各自的测试方法中进行了描述。 1.4 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。 1.5 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。 1.6 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====== 4.1 本规程向最终用户描述了如何收集在役油样的FT-IR光谱，用于在役油况监测。FT-IR光谱可以测量各种在役油况监测参数，如氧化、硝化、烟灰、水、乙二醇、燃料稀释、汽油稀释、硫酸盐副产物和磷酸盐抗磨添加剂 ( 4- 7. ) 这些参数值随运行时间的变化可用于帮助诊断各种机械和设备的运行状况，并指示何时应更换机油。 本规程旨在为在役油况监测中使用的FT-IR仪器和操作参数提供标准化配置，以获得仪器之间和实验室之间的可比数据。

1.1 This practice covers the instrument set-up and operation parameters for using FT-IR spectrometers for in-service oil condition monitoring for both direct trend analysis and differential trend analysis approaches. 1.2 This practice describes how to acquire the FT-IR spectrum of an in-service oil sample using a standard transmission cell and establishes maximum allowable spectral noise levels. 1.3 Measurement and integrated parameters for individual in-service oil condition monitoring components and parameters are not described in this practice and are described in their respective test methods. 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, 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 ====== 4.1 This practice describes to the end user how to collect the FT-IR spectra of in-service oil samples for in-service oil condition monitoring. Various in-service oil condition monitoring parameters, such as oxidation, nitration, soot, water, ethylene glycol, fuel dilution, gasoline dilution, sulfate by-products and phosphate antiwear additives, can be measured by FT-IR spectroscopy ( 4- 7 ) . Changes in the values of these parameters over operating time can then be used to help diagnose the operational condition of various machinery and equipment and to indicate when an oil change should take place. This practice is intended to give a standardized configuration for FT-IR instrumentation and operating parameters employed in in-service oil condition monitoring in order to obtain comparable between-instrument and between-laboratory data.