Adding Data Logging

 Download the Step-by-Step Procedure PDF

Before starting this procedure, you should complete the exercise and use the solution in the Taking a Measurement module. You can also create a numeric control to simulate the data acquisition input.

1. Add the Write to Measurement File Express VI to the block diagram
   1. Right-click on the block diagram and select Express»Output»Write To Measurement File
   2. Place the Write to Measurement File Express VI to the right of the DAQ Assistant, within the While Loop
2. Configure the Write to Measurement File Express VI
   1. Enter the Filename as desired; select the Browse icon if preferred
   2. Specify the File Format as desired; in this example Binary (TDMS) is selected
   3. Choose which Action to take if the Filename already exists; in this example Append to file is selected
   4. Specify the Segment Header type as desired; in this example only one header is created for the entire log file that is composed of multiple data sets
   5. Specify the X Value Columns as desired; in this example there is One column only for the time columns
   6. Provide a File Description to help identify the data set if desired
3. Wire the data from the DAQ Assistant into the Signals input of the Write to Measurement File Express VI
4. Run the VI to visualize the data on the front panel as well as log data to the file
5. Read the Binary TDMS log
   1. Use the Read from Measurement File Express VI located by right-clicking on the block diagram and selecting Express»Input»Read from Measurement File
   2. Use the TDMS plug-in with Microsoft Excel to open the file by opening Excel, selecting the Add-Ins pane, selecting the TDMS Importer button, and browsing to the Filepath (the data is located on the second worksheet tab of the Excel document)