- with all 3 bolts screwed in fully, close the hatch and lock the quarter-turn fasteners
- remove the ladder
- go to the ''Advanced '' tab on the control GUI and click the ''grating angle initialise '' button (in the bank of buttons on the left)
* Once you have the correct grating in the spectrograph, enter the approximate starting angle (given in the grating table above) in the ''Grating angle'' box and click ''Go''. Compare the resulting arc spectrum with the arc maps in Chapter 10 of the old spectrograph manual. Automated grating angle determination is on the way, but has yet to be implemented in the Quick-Look GUI.