Abstract: Measuring instrument assembly (1) comprising a measuring instrument apparatus (2) for measuring electrical measurement variables, wherein the measuring instrument apparatus (2) comprises a measuring unit (4) comprising measuring electronics (3), and an output unit (5) comprising at least one output means (6), wherein an item of information generated from the measuring unit (4) and/or relating to the measuring unit (4) can be output via the output unit (5), wherein the output unit (5) can be or is detachably connected to the measuring unit (4).