Abstract: A user interface unit as an operation control unit (20) is arranged between an operation panel (10) and a measuring unit (30) and includes a general purpose processing unit (21) and a memory unit (22). The general purpose processing unit (21) includes an input processing unit (S), a guidance display processing unit (T), and a determining unit (SB). Each processing unit includes individual processing units corresponding to various types of operation members (11a-11d) and display members (13, 14) falling within the range assumed to be used for various types of measuring devices, and a processing managing unit for selectively operating the individual processing units in accordance with information from the memory unit (22). The general purpose processing unit further includes a managing unit (U) for managing an operation procedure on the basis of information from the memory unit.