Waters 2489 - Principles of Operation; Detector Optics

1-4 Theory and Principles of Operation
Principles of operation
To use the detector effectively, you should be familiar with its optical and
electronic design and the theory and principles of its operation.
This section describes the following parts and functions of the detector:
•Optics
• Wavelength verification and test
•Flow cell
• Electronics
Detector optics
The Waters 2489 UV/Visible Detector optics are based on a Fastie-Ebert
monochromator and include the following:
• High brightness deuterium (D
2
) lamp
• Two mirrors: one off-axis ellipsoidal mirror and one spherical mirror
• Filter wheel
• Shutter, wavelength calibration filter, and second order filter
• Entrance slit
• Blazed, plane holographic diffraction grating
• Beamsplitter
• Sample and reference photodiodes
• Waters TaperSlit™ Flow Cell (its entrance is the exit slit of the
monochromator)
• Cuvette holder