6 REMOVING THE SOURCE HOLDERPerforming substantially the same operations described in the section on installation in reverse order; refer to the photos of the previous paragraph. Send the measuring heads in the garage. Remove and drain the air with the special valve on the side of the meter, so make sure that the shutter remains closed and the measuring heads have no possibility of movement: the shutter closed to traffic lights in three colors (yellow - green - red) turns on the light green. Remove the side guards by removing the screws. Remove with an allen key the 4 screws that secure the source holder to the plate scanner. Disconnect the air hoses and connectors. At this point the source holder can be removed, taking care to keep it horizontal so that the shutter cannot open (Mylar face always downwards) .