Switchable measuring instrument for direct currents and/or alternating currents and direct voltages and/or alternating voltages

摘要

Such measuring instruments should be simple to operate, easy to read and comprehensively indicate the measurement value including polarity and type of current. This is achieved in this case by a type-of-current and polarity indicating device being connected via an evaluating circuit to the measuring instrument input independently of the type-of-current switch.