continuois voltage graph

[Bill V.]

  Hi!!  I am using lab view with a nidaq-6015 board for electrochemical analysis.  My knowledge about the software is very limited and I am not able to program my own graphs.  I need to use examples of xy graphs which are already programed.  The graph needs to have voltage measured along the x-axis and along the y-axis.  Where can I find a graph like this?  How can I take an already existing graph of voltage vs time, and change the x-axis to be a measurement of voltage??

Thank You,

Bill V

[labviewmission]

Hello Sir,

if you are using Labview 7.1 and above you may goto to block diagram and select functions pallete . From the palette select express VIS and then DAQ assistant from Input(I have attached where to find the DAQ assistant). This will result in a pop up .You can select your voltage channel  and follow the steps.  In the end after  it builds you measurement system . Right click at the output and say create  " graph indicator"

You should get your result. Hope it helps let me know if you need more details .

Regards.

[Dennis_Knutson]

Actually, that will not create an XY Graph but just a normal graph with time on the x-axis. There is however, an Express XY Graph. This is selected on the front panel. Use the DAQ Assistant to create your measurement task and then you can use the Split Signal function to wire up the x and y inputs on the XY graph.

[Bill V.]

  I'm sorry.  Two messages might have been sent accidently.  I need an xy graph with voltage as the units for the x and y axis.  I wasn't able to correctly wire the x and y inputs into the xy graph using the split signals.  I used the split signal which converts two wires into one.  I put the x and y inputs into the end of the split signal with two ends.  I then took the split signal with one end and connected it to the xy graph, but an error poped up each time.  Is there a different way to connect this?

[Dennis_Knutson]

The split signal only has one version and it converts 1 combined signal into two output signals. You must be using the merge signals and that does just the opposite of what you want. If you already have two separate x and y signals there is no reason to use the split or the merge. Just wire them up to the Express XY Graph. I was assuming that you were using the DAQ Assistant. That returns dynamice data. If you don't want to use the Express XY, use a regular XY graph and bundle the x and y arrays together like the on-line help shows. There are also shipping examples for the xy graph.

Message Edited by Dennis Knutson on 10-05-2006 12:56 PM