Highlight and select the item with the mouse. Highlight and select it with the keypad and press . When you enter, it asks if you want to reset Argus. This does a home checkout for all positioners, the periscope, the comparison lamp assembly and the TV camera. It then uses a centering algorithm to determine the position with the greatest flux.
All positioners move simultaneously.
The autocentering process takes about 2 minutes. Because of how the current CCDs are read out, this option is no longer used. Unless a maximum in the flux is detected within two arcseconds of the nominal position of an object, the positioner will return to the initial location for the exposure. This almost always prevents the autocentering process from centering on the wrong object. It may be desired to manually disable autocentering in one or more fibers, such as on a diffuse object.