Waters 2475, Operator'S Manual, Page: 23 / 228

Principles of operation 1-9
Principles of operation
To use the detector effectively, you should be familiar with the optical and
electronic design of the detector and the theory and principles of operation.
• Optics
• Wavelength verification and test
• Flow cell
• Electronics
Detector optics
The optics are based on a pair of tunable monochromators and include the
following parts:
• Xenon arc lamp
• Two ellipsoidal mirrors and one parabolic mirror
• Shutter, wavelength calibration filter, and second-order filter
• Entrance slits
• Exit slits
• Blazed, plane, and concave holographic diffraction gratings
• Photomultiplier tube (PMT)
• Waters axially illuminated flow cell