==Technical Notes==
===Grating Angle Change Instructionsangle change instructions with the temporary brake in place===
- open up the south cover of the instrument (it does not need to be fully removed, just opened enough to be able to access the brake)
- lock the grating on the ''Config'' tab
- enable the physical brake on the grating (inside the instrument) by tightening the 4 black bolts
- tighten the bolts very ''carefully '' to avoid disrupting the grating , as that will one could slightly change the angle and the process may will need to be repeated
- close up the south cover of the instrument