The subsequent installation of a measuring device in a distribution system brings beads of sweat to the forehead of even the most experienced fitters. A measuring device needs current transformers to measure. Now the question arises how these transformers can be retrofitted over busbars or several parallel cables. Mostly not at all! The possibility to connect Rogowski tapes and the new functions pointer diagram and oscilloscope make the multimess F96 from KBR a true multitalent.