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Section IV-D: Converting the SP-2300i from Monochromator to Spectrograph, or
Spectrograph to Monochromator
Monochromator to Spectrograph: This procedure requires that you have the monochromator version,
Model SP-2355 or SP-2357, plus the array detector mounting flange. May require a spacer.
1. Using a 1/8” Allen wrench, loosen the two (2) #10-32 set screws located on the top and side of the
front plate.
2. Remove the four (4) 8-32 socket head cap screws (SHCS) which secure the exit slit to the SP-2300i
housing. Details of the slit assemblies can be found in the drawing located in the Appendices Section.
3. Gently slide the exit slit assembly out of the SP-2300i housing and store in a clean, dry area. An exit
slit assembly is attached to a sliding tube which is removed along with the slit body.
4. Slide the array detector mounting flange into the SP-2300i housing so that it rests against the housing.
It may be necessary to turn the focus-stop thumb wheel counter clockwise so that it does not interfere
with the array detector mounting flange.
5. The SP-2300i has now been converted from monochromator to spectrograph.
6. Refer to Sections III-E “Mounting Focal Plane Detectors...”, and IV-C “Focus and Aligning Array
Detectors” for actual mounting, alignment, and focus of array detectors.
Spectrograph to Monochromator: This procedure requires that you have the spectrograph version,
Model SP-2356 or SP-2358, plus the Model SP-716-2 exit slit assembly. May require a spacer.
1. Using a 1/8” Allen wrench, loosen the two (2) #10-32 set screws located on the top and side of the
front plate.
2. Gently slide the array detector mounting flange out of the SP-2300i housing.
3. Remove the array detector if attached, then store the array detector mounting flange in a clean, dry
place.
4. Locate the Model SP-716-2 exit slit assembly, then gently slide it into the SP-2300i housing until it
rests against the housing. Exit slit assemblies are attached to a sliding tube to fit the SP-2300i
housing.
5. Using four (4) 8-32 socket head cap screws (SHCS), secure the slit assembly against the SP-2300i
housing. There are four (4) tapped holes in the SP-2300i housing to facilitate mounting the exit slit.
Note: The slit aperture is slightly offset in the slit assembly. It should be oriented so that the
aperture is on the upper side when properly mounted to the SP-2300i. On the bilateral slits,
the micrometer points upward. Please refer to the drawing in the Appendices section of this
manual for correct orientation if necessary.
6. The SP-2300i has now been converted from spectrograph to monochromator.