ASTM D7844 Standard Test Method for Condition Monitoring of Soot in In-Service Lubricants by Trend Analysis using Fourier Transform Infrared (FT-IR) Spectrometry
7. Apparatus
7.1 Fourier Transform Infrared Spectrometer, equipped with sample cell, filter and pumping system (optional) as specified in Standard Practice D7418.
7.2 FT-IR Spectral Acquisition Parameters - Set FT-IR spectral acquisition parameters according to instructions in Standard Practice D7418.
8. Sampling
8.1 Obtain a sample of the in-service oil and the reference oil according to the protocol described in Standard Practice D7418.
9. Preparation and Maintenance of Apparatus
9.1 Rinse, flush and clean the sample cell, lines and inlet filter according to instructions in Standard Practice D7418.
9.2 Monitor cell pathlength as specified in Standard Practice D7418.
