Patent ID: 7439725

Claim:
A multimeter, comprising: a housing having at least three input connections, being female connectors for connecting to two measurement lines, and when a new measurement variable is to be measured, it is possible to connect at least one of the measurement lines to another one of said input connections being associated with the new measurement variable; a measurement-range switch being moved to a switching position associated with selected measurement variables, said measurement-range switch being supported by said housing; a mechanical blocking apparatus coupled to said measurement-range switch, said blocking apparatus allowing specific ones of said input connections to be blocked such that contact, which carries a measurement signal via the measurement lines, is made only with said input connections having an associated measurement variable corresponding to the measurement variable set by said measurement-range switch, said blocking apparatus having an apex and a pivotable angle lever mounted substantially at said apex, said angle lever having strip-shaped angle limbs with end regions, said measurement-range switch moving said end regions of said strip-shaped angle limbs to a position aligned with a respective one of said input connections to be blocked; a connector housing being an encapsulated, water-tight connector housing, said blocking apparatus disposed in said connector housing, said connector housing having side walls laterally surrounding said blocking apparatus and a connector-support wall; and said connector-support wall being closely connected to said side walls of said connector housing.