Disassembly and Replacement
4. Carefully lift up on the grating assembly to pull it off the grating motor shaft. The plastic neck of the
grating assembly may come out of the clamp collar as it is being pulled upward.
5. If it is not already off, remove the clamp collar from the grating assembly and set it aside for later
use on the new grating assembly.
Replacement
1. Position the clamp collar around the plastic neck of the grating assembly with the clamp screw
loose.
2. Slide the grating assembly and collar onto the grating motor shaft making sure the collar stays in
place around the neck of the grating assembly.
3. Slip the spacing tool (from the alignment kit) between the grating and the grating motor to provide
0.5mm space. This space prevents any friction between the grating mount and the top of the motor.
4. Tighten the screw on the clamp collar.
5. After all replacements are complete for mirrors, light source, grating, and lenses, follow the optical
alignment procedures in Optical Alignment.
6. When all other work is complete, replace the Monochromator cover (refer to “Monochromator ").
7. When all other work is complete, replace the Beam Splitter and turret cover (refer to “Beam splitter
and turret cover ").
8. Perform Optical Alignment and wavelength calibration.
5-20
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