LJtest runs a sequence of tests on the LabJack itself.
Users will generally leave “Factory Test Fixture Installed” unselected and execute the tests with nothing connected to the LabJack (except the USB of course).
Note that the U12 is not the “Test Fixture” for the purposes of this program.
Rather, the U12 is the device under test (DUT) and might connect to a test fixture which tests the U12.
The “Continuous” option causes the test program to keep running over-and-over.
LJtest is installed as part of the normal U12 software package.
It can typically be run by doing Start => Programs => LabJack U12 Legacy => Legacy U12 Samples => LJtest.