1.1 - Hardware Installation
With the PC on and using the included cable, connect the LabJack U12 to the USB port on the PC or USB hub. The USB cable
provides power and communication for the LabJack U12. The status LED should immediately blink 4 times (at about 4 Hz), and
then stay off while the LabJack enumerates.
Enumeration is the process where the PC’s operating system gathers information from a USB device that describes it and it’s
capabilities. The low-level drivers for the LabJack U12 come with Windows and enumeration will proceed automatically. The first
time a device is enumerated on a particular PC, it can take a minute or two, and Windows might prompt you about installing
drivers. Accept all the defaults at the Windows prompts, and reboot the PC if asked to do so. The Windows Installation CD might
also be needed at this point. Make sure a CD with the correct version of Windows is provided. Enumeration occurs whenever the
USB cable is connected, and only takes a few seconds after the first time.
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When enumeration is complete, the LED will blink twice and remain on. This means Windows has enumerated the LabJack
properly.
If the LabJack fails to enumerate:
Make sure you are running Windows OS version 4.10.2222 or higher,
Try connecting the LabJack to another PC,
Try connecting a different USB device to the PC,
Check our online forum and/or contact LabJack.
1.2 - Software Installation
Although the low-level USB drivers for the LabJack are included with Windows, high-level drivers are needed to send and receive
data. Get started by going to labjack.com/support/u12.
When the LabJack installation is finished, it will start the National Instruments LabVIEW Run-Time Engine (LVRTE) setup. The
LVRTE is required for the example applications such as LJtest. If prompted to reboot after this installation, go ahead and do so.
Virus scanners can often interfere with the installation of the LVRTE. If you have trouble running the example applications, repeat
the LabJack software installation to make sure the LVRTE is installed.
To test the installation, start LJtest by selecting
Start => Programs => LabJack U12 Legacy => Legacy U12 Samples => LJtest.
Make sure “Test Fixture Installed” and “Continuous” are not selected, and press the “Run” button. LJtest will step through 14
separate tests and all should pass. The I/O tests assume nothing is connected to the U12 (except USB), so they will likely fail if you
have any connections.