Abstract: A filter-drying device having a compressed-air connector and at least one filter connector, wherein the filter-drying device is adapted to fluidically connect the compressed-air connector to the at least one filter connector in a first functional state and to fluidically separate it from the at least one filter connector in a second functional state, wherein the at least one filter connection is adapted to receive a filter, in particular a multi-usable ventilating filter, and to form an airtight connection between the filter-drying device and the filter.

Abstract: The invention relates to a coupling device with at least one first connector, at least one second connector, at least one third connector and a valve device, wherein the at least one first connector is adapted to fluidically connect a media supply filter test device to the coupling device, wherein the at least one second connector is adapted to fluidically connect a multiplier device to the coupling device, wherein the at least one third connector is configured as a hot steam connector, wherein the at least one first connector, the at least one second connector and the at least one third connector are flow connected to the valve device, wherein the valve device is adapted to connect, in a first operating mode, at least one third connector of the at least one third connector fluidically simultaneously to at least one first connector of the at least one first connector and to at least one second connector of the at least one second connector, so that the media supply filter test device connected to the coupl