Objective describe the best applications for infrared ir...

Objective: Describe the best applications for Infrared (IR) Scanning in maintenance and highlight the benefits of each application. Applications: • Electrical Systems • Bearings in Machinery • Insulation Tasks: • For each application, explain why IR Scanning is an effective tool. • Provide examples where IR scanning could prevent critical failures.

Explain the function of the laser on an FT-IR instrument. What is the function of the interferometer on an FT-IR? Explain why the sample in an IR spectrophotometer is placed as close as possible to the radiation source, and in a UV-Vis instrument, it is placed after all the diffraction optics. For solid samples dissolved in KBr, what should be used as a background, air or dry KBr? Why? Explain what ATR is. Why does the polystyrene signal not show overtones under ATR conditions? Mention and discuss at least three optical advantages of and two limitations of an FT-IR. What FT-IR systems rely on pyrolytic detectors rather than thermocouples? Explain what a black body emitter is and how it can interfere in the IR signal of a sample. What is a COSY-NMR and HETCOR NMR spectra? Explain the function of a shim coil, a decoupler, and TMS in NMR? What is a diastereotopic proton? How does it affect the NMR signal? Explain the function of the lock, shim, and spinner in NMR.

Adi S.

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