The vacuum operated Test Fixtures for the HP 3070 Test System family are based on the original HP Interface (Alignment) Plate design and enhanced with an INGUN vacuum cassette.

The Probe Plate is made of 14 mm epoxy fibre-glass laminate (G10) material with a double-sided grid print. The Top Plate is made of 8 mm epoxy hard-paper and coated both sides with an anti-static epoxy fibre-glass laminate layer.

The vacuum sealing is achieved using the renowned INGUN wear-free V-profile seal. Optionally, a stroke-counter can built into the aluminium housing frame on the rear, left side. When testing PC boards with open vias, 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 vacuumsealed cover (with push-rods). Furthermore, Pressure-Frame Units for TestJet-Assembly are available for all standard fixture sizes.

Additional Contacting Unit (ZSK) for dual-sided contacting

The Additional Contacting Unit from above is assembled onto the HP 3070 Test Fixture and enables the possibility of double-sided contacting.

The manual movement of the hinged Unit is supported by gas-springs.

The mechanical design of the movement of the Unit ensures vertical approach of the Test Probes to the test points on the PC board.

The three guide pins guarantee high-precision registration of the Unit. The minimum possible test point target diameter from the upper-side is 0.5mm and from the lower-side 0.4mm.

PC board-specific milling of the Probe Plate (i.e. upper-side) of the Additional Contacting Unit is necessary when the maximum component is higher than 10 mm, and on the under-side when the maximum component height is higher than 3 mm.

This design of the Additional Contacting Unit does away with the necessity of PC board specific sealing.

The fixtures are also available in ICT/FCT (dual-stage) versions. The design of which is based on a shuttleplate principle with electro-drive.