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Model 12KN Dual Level Pneumatic Fixture System


  • Standard, dual level probing for ICT and isolated Functional Tests
  • No extra cost for standard ICT fixtures
  • Available TestJet Technology*, Boundary-Scan, and MultiWriter part programming
  • Ergonomically friendly slide-in fixtures, straight-in and out, top and bottom lock-in for safety
  • Fully-integrated CheckSum Windows test system software environment
  • Operator safety light curtain
  • Built-in SPC measurement tools; easily integrated into factory data system
  • Rapid and smooth press actuation
  • Integrated rack/cabinet
  • CE Conformance Tested
  • Up to 5200¹ Test Point Capability
  • Compatible² with KIT2KN-QC and KIT1000-QC Fixture Kits


  • Dual Level Probing
  • Circuit assemblies with SMT / Through-hole Devices
  • Top and Bottom Probing
  • Hard-to-Gasket Assemblies
  • Individual or Panelized PCBs

12KN Long-Travel Pneumatic Fixture System

The CheckSum Model 12KN Long-Travel Pneumatic Fixture System is designed to be the basis for CheckSum stand-alone bed-of-nails test systems.  Integrated into the system is rack space for system electronics, a keyboard, and a front panel with a minimum selection of buttons to make it easy, safe, and error-free for the operator to use.

The Model 12KN can be used for test fixturing of circuit boards up to 24 x 13.2 inches (61 x 33.5 cm) with the fixture kit "KIT28". This fixture system can be used for most general-purpose bed-of-nails fixturing applications including those requiring dual level, top and bottom probe access, and TestJet Technology*.

The Model 12KN utilizes a 7.75 inch long-travel pneumatic mechanism so that a lid does not need to be opened and closed between tests.  The unit-under-test (UUT) is simply removed and the next one put into place.  The top plate and the fixture base must be locked into place before the system can be used.  To start the test, the operator presses the Test button.  A built-in safety light curtain will sense if any object enters the working area and stop the movement of the top lid immediately for safety.

Change-Over for New UUTs
The 12KN makes change-over from one type of UUT to another quick and easy.  The top plate of the fixture can be released with the push of a button and the plate can be pulled-out.  The new plate slides straight-in to the slot in the top lid.  The fixture kit base is released with the push of a button and pulled straight-out.

With the integrated fixture interface, there are no cables to change or tools required.  Fixtures can be changed out in a matter of seconds.

Integrating System Electronics
For compatibility with CheckSum Test Electronics, the Model 12KN contains extra 19 inch EIA rack space.  Rack slides allow the test electronics to be easily accessed for maintenance.

The Model 12KN can be used for most general-purpose fixturing applications and can also be used when the unit-under-test (UUT) is difficult to gasket and seal on vacuum fixture systems, when probe loading per square inch is high, if many routed openings exist, or if there are open through-holes (often found on SMT UUTs).

¹ The compression force required for the total number of spring-probes cannot exceed the 2700 pounds (12000 newtons) limit of the 12KN system.

² An adapter is provided to use KIT20, KIT2KN-QC, or KIT1000-QC fixtures on the 12KN. Existing KIT1000-QC and KIT2KN-QC kits may require top plate modification.

* TestJet Technology is protected under U.S. patent numbers 5,124,660 and 5,254,953.

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12KN Fixture System
Model 12KN
Dual Level Long-Travel Pneumatic Fixture Press
(shown with some optional equipment)

12KN Instruction Manual PDF