User Manual

Figure 3-2. LJconfig Change Local ID
Enter a new local ID between 0 and 255 and push the “Change” button. The new local ID will
be written and the LabJack will be forced to re-enumerate.
3.2 LJcounter
Reads the LabJack counter and provides the current frequency or count.
Figure 3-3. LJcounter
Figure 3-3 shows the LJcounter window:
• Interval (seconds): Specifies the interval, in seconds, between calls to the DLL
function “Counter”.
• Measurement Type: If set to “Frequency”, this application divides the count by the
interval to determine frequency in Hertz, and automatically resets the counter every
read. If set to “Count”, the measurement is simply the current reading from the counter.
• Measurement: Displays frequency or count, depending on “Measurement Type”.
3.3 LJfg
This application allows the LabJack U12 to be used as a simple function generator. The DLL
function “AOUpdate” is called every 25 milliseconds providing an update rate of 40 Hz, and thus
a maximum reasonable signal frequency of a few Hertz.