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 Remendations issued by the World Trade Organization Technical Barriers to Trade (TBT)Committee. Designation:D7844-21 INTERNATIONAL Standard Test Method for Condition Monitoring of Soot in In-Service Lubricants by Trend Analysis using Fourier Transform Infrared (FT-IR) Spectrometry This standard is issued under the fixed designation D7844:the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision.A number in parentheses indicates the year of last reapproval.A superseript epsilon (e)indicates an editorial change since the last revision or reapproval. 1.Scope be based on a rate of change of the response measured(1).2 In 1.1 This test method pertains to field-based monitoring soot either case such maintenance action limits should be deter- in diesel crankease engine oils as well as in other types of mined through statistical analysis history of the same or engine oils where soot may contaminate the lubricant as a similar equipment round robin tests or other methods in result of a blow-by due to inplete bustion of in-service conjunction with the correlation of soot levels to equipment fuels. performance. 1.2 This test method uses FT-IR spectroscopy for monitor- 1.4.1 Interpret...
ASTM D7844-21 用傅里叶变换红外光谱法（FT-IR）趋势分析法对在用润滑剂中烟尘进行状态监测的标准试验方法.pdf
