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Chapter 5 Using the NI PXI-4224
© National Instruments Corporation 5-5 NI PXI-4224 User Manual
Acquiring, Analyzing, and Presenting
After configuring the task and channels, you can start your acquisition, read
measurements, analyze the data returned, and display it according to the
needs of your application. Typical methods of analysis include digital
filtering, averaging data, performing harmonic analysis, applying a custom
scale, or adjusting measurements mathematically.
NI provides powerful analysis toolsets for each NI ADE to assist
non-programmers in performing advanced data analysis. After you acquire
the data and perform any required analysis, it is useful to display the data
in a graphical form or log it to a file. NI ADEs provide easy-to-use tools for
graphical display, such as charts, graphs, slide rules, and gauge indicators.
NI ADEs have tools that allow you to save the data to files such as
spreadsheets for easy viewing, ASCII files for universality, or binary files
for smaller file sizes.
Completing the Application
After you have completed the measurement, analysis, and presentation of
the data, it is important to stop and clear the task. This releases any memory
used by the task and frees up the DAQ hardware for use in another task.
Developing an Application Using LabVIEW
This section describes in more detail the steps shown in Figure 5-1, such as
how to create a task in LabVIEW and configure the channels of the
NI PXI-4224. For further instructions, select Help»VI, Function, &
How-To Help from the LabVIEW menu bar.
Note Except where otherwise stated, the VIs in Table 5-2 are located on the Functions»
All Functions»NI Measurements»DAQmx - Data Acquisition subpalette and
accompanying subpalettes in LabVIEW.