Changes
/* Calibrations */
'''If the calculated orders are far from those expected''', the prisms will need initialising. Repeat steps (1)-(6) until the expected orders are in the frame. When this happens, the correct prism position is usually achieved over 3 initialisations, but it is important to move the prism after an initialisation, i.e. always follow steps (1) with step (3) (you can skip step (2) because you already defined your desired position); don't do step (1) twice in a row, or GIRAFFE will get quite upset.
=='''Focus'''==
'''Spectrograph focus'''
You can check the spectrograph focus on an arc image.
'''Telescope focus'''
If GIRAFFE has been used for the week before your run, you can probably assume that the telescope focus is about right. However, after an instrument change the focus might be quite far off. Good focus with GIRAFFE tends to fall in the range 1800-2100, depending on temperature. On the TCS, set the telescope focus to somewhere in this range. You can look in the scruffy A4 notebook stored in the "Log Books" section of the book shelf for a recent history of telescope focus values.
=='''Calibrations'''==
'''3.1 Camera Flats'''
Taking camera flats involves interacting with the components on the bench in the Coude room. '''Please be extremely careful not to touch anything except the flatfield screen and the lamp'''.
'''3.3 Arcs'''
At the start of an observation, take 2 arc exposures as follows:
