When you wish to extend the capabilities of the examples or wish to start a new custom application, the set of LabVIEW functions installed with the instrument driver provide all the building blocks you will need. Any custom LabVIEW application you create will be composed of a front panel, which is the graphical user interface, and a block diagram, which is the flow chart-style code created with these functional blocks VIs.
For resources that outline the fundamentals of this industry-standard development environment, please refer to the links at the end of this section. Each palette represents a distinct category of instrument driver functions for programming the A. Two instrument driver palettes are shown below, in Figure 2. Figure 2. Use the instrument driver VIs to define your custom application.
In Figure 3, we show the block diagram of a sample application created with these VIs. This application initializes communication with the A, takes 10 voltage readings from each channel in the scan list, and finally ends communication and checks for errors. It displays the acquired data on a front panel indicator not pictured. A significant advantage of customizing your LabVIEW application is that it enables you to combine the unique functions of the instrument driver with the standard functions built-in to LabVIEW.
With these, you can quickly and easily take your application far beyond merely programming the instrument to create a completely user-defined solution. Since peak detection is one of the analysis functions available in LabVIEW, we can easily add that functionality to our application.
LabVIEW can also be used to interface with a data management system, whether that consists of a simple spreadsheet file or a relational database. The block diagram in Figure 4 extends the functionality of our previously created code to discover the peaks of the dataset and then log those values to a tab-delimited text file compatible with Excel. Figure 4. Because creating crisp graphical user interfaces in LabVIEW is easy, we could have also chosen to visualize the data in a chart or graph.
As outlined above, using the A with a LabVIEW instrument driver creates a useful PC-based virtual instrumentation system for acquiring, analyzing, and presenting test data. If you are looking for an easy way to increase the speed, sensor support, and channel count of your test and measurement system then you may want to consider adding NI CompactDAQ hardware to your setup. Figure 5. NOTE 2: V2.
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The product page can be viewed using: www. Download the driver from the National Instruments website: www. Available Programming Tools There are different software and programming tools available for the A. They can be selected from the A main product page; the page can be viewed using: www.
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