Model TR-3A Bed-of-Nails Vacuum Fixture System
Features
- Bed-of-Nails Fixturing
- Up to 1500 Test System Connections
- Automated Vacuum Control Valve included in TR-3A
- Compatible with CheckSum Testers
- Industry-Standard Interface
- Low Cost
Applications
- Loaded Boards
- Bare Boards
CheckSum TR-3A Vacuum Fixture System Overview
The CheckSum Model TR-3A Fixture System allows CheckSum Test Systems to be interfaced to the unit-under-test (UUT)
via a Bed-of-Nails Vacuum Fixturing system.
The 50-pin ribbon cables from the Test System electronics attach directly to mating connectors on the back of the
Fixture Receiver. Internal to the Receiver, cabling carries the signals to pin blocks with spring probes that provide
a reliable interface to easily interchanged test heads which are customized for each UUT or family of UUTs.
The Model TR-3A Receiver Assembly accommodates up to 1500 test points and uses industry-standard
GenRad 2270-compatible test head kits. The Receiver provides for connection of your vacuum pump
via a 1-1/4"-hose connection. The TR-3A has an automatic control valve that is remotely
controlled by the test program.
For each 150 test points connected to the Receiver, a Model TR-3-1 pin block with internal
wiring and back panel connectors is needed.
Test heads can be obtained locally and customized for your specific application, or kits
can be purchased directly from CheckSum.
The Model TR-3-1620 is 16 x 20 inches (40.6 x 50.8 cm) and the Model TR-3-2024 is 20 x 24 inches (50.8 x 60.96 cm).
For each 150 test points used for testing, a Model TR-3-2 Interface Block is required in the test head.
CheckSum can also provide complete custom fixturing solutions or provide referrals.
Download Model TR-3A Kit Data Sheet 
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