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DAQFactory for UD - Windows

DAQFactory examples for the Windows UD library. The Windows UD library is the high-level Windows library/driver for the LabJack U3, U6 and UE9. For other LabJack devices, go to the Software page.

DAQFactory is measurement and automation software from Azeotech.  For general information, go to the Azeotech website.

Getting Started

  1. Go through the DAQFactory for UD Quick Tutorial.

  2. Download and run the examples in the following section.

  3. For additional information, see the remainder of this page and the DAQFactory - LabJack Application Guide.


The first download below is an archive that contains all of the examples referenced in the DAQFactory - LabJack Application Guide. The other items are miscellaneous, additional examples.

DAQFactory Application Guide

AIN Differential U3.ctl

AIN Configuration U6.ctl

AIN Configuration UE9.ctl

EI1050 U3.ctl

EI1050 U6.ctl

EI1050 Double U6.ctl

EI1050 UE9.ctl




Pulse _Out_Using_WAIT_U3U6.ctl




Simple PeriodIn32 Example.ctl




Thermocouple LJTIA U3.ctl

Thermocouple U6.ctl

Thermocouple UE9.ctl





Getting Help

LabJack support can help with some DAQFactory questions, but often the AzeoTech forum is the best resource.

UD Library Overview

First, read the general overview of the UD library.

The UD driver has a handful of functions, many with the same 4 to 6 parameters.


The main functions are used to build a list of requests (Add), execute the list (Go), and read the result of each request (Get).  Some functions (e.g. eGet) combine a single add/go/get into one function call.


The parameters are described at the bottom of the Overview page.  The meaning of each parameter should be apparent (e.g. Channel is the channel number you are operating on), but when it is not the pseudocode section of the device's datasheet has the extra information needed.

  • Handle:  Always the handle.

  • IOType:  Always the IOType.

  • Channel:  If something besides a channel number the pseudocode section will tell you.

  • Value:  Always the value.

  • X1:  Usually not used, but if used the pseudocode section will tell you.

  • UserData:  Usually not used, but if used the pseudocode section will tell you.


Device specific pseudocode can be found in the device datasheet pseudocode section (U3/U6/UE9).

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