A measuring device comprises a control unit, a measuring unit, a display unit and an input unit. The measuring unit comprises a plurality of functional units and a connection unit configured for selectively connecting the plurality of functional units. The control unit is configured to control the display unit to display a plurality of function blocks each corresponding to at least one functional unit. The input unit is configured to allow a user to select one of the plurality of function blocks. The control unit is configured, after a function block is selected by the user, to control the display unit to display possible connections of the selected function block to further function blocks.