A chromatography column comprises a tubular member having an open inlet end and an outlet end and being adapted to receive a packing material, and an end piece inserted through the inlet end of the tubular member. The display controller is operable for determining whether a specified video input interface included by the plurality of video input interfaces is coupled to a video source. The method further includes suppressing transmission of a further channel release notification based on data included in the first channel release notification that indicates an origin of the channel seizure or the release causing the first channel release notification to be generated.