Fluid analysis and monitoring using optical spectrometry

A processor implemented method of controlling an operating machine, the method comprising:

• receiving, by a fluid diagnostic system, a fluid sample from the operating machine, wherein the fluid sample is received by a fluid inlet into a sample chamber of the fluid diagnostic system, the fluid inlet configured to fluidically couple to a fluid source of the operating machine and the sample chamber fluidically coupled to the fluid inlet and configured to receive the fluid sample from the fluid source;
• generating incident electromagnetic radiation and providing the incident electromagnetic radiation to the fluid sample;
• receiving emitted electromagnetic radiation from the fluid sample in response to interaction of the fluid sample with the incident electromagnetic radiation;
• determining, by a processor circuit of the fluid diagnostic system, spectral features of the emitted electromagnetic radiation as represented by a detection signal received by the processor circuit from a detection system that receives the emitted electromagnetic radiation;
• and
• determining a condition of the fluid sample based on the determined spectral features.