The vacuum operated Test Fixtures for the IFR Test Systems consist of a base hou-sing and an INGUN vacuum cassette. The cassette is hinged for easy access to the receptacles and wiring during vacuum actuation and PC board contacting.

The Interface Panel for the MC 4200/4210 test system ist mounted in the base plate of the housing. See photo! The Probe Plate is made of standard 10 mm hard-paper laminate (CEM-1) material. The Top Plate is made of 8 mm epoxy hard-paper laminate and coated both sides with an anti-static coating. The vacuum sealing within the cassette of the VA 2040 fixture version is achieved using the renowned INGUN wear-free V-profile seal. (See also section 9 of this catalog for more information on vacuum fixture designs). When testing PC boards with open vias and other open areas, we recommend the use of either a Vacuum-free Zone sealing method (with a pressure-frame unit and push rods) or the use of a vacuum-sealed cover (with push-rods).