Voltage vs. time

[Amanda_Kay]

Hi I wanted some advice on what graph/chart to build. I have two voltage channels that I want as my two data points on Y-axis. Then for the X-axis I want the time in microseconds(or a similar value). Didn't know which option would be the best to display it.

Thank you so much

[Tim_McClung]

Start with a chart, it depends more on how you want your interface to update.  Graphs are all at once and charts have a 'memory' that shows history.  If you are wanting to have voltage over time I would recommend using a waveform type with your data acquisition...  Are you using Daqmx?  If so it's pretty simple, your output will go straight into the chart.  It'll looks something like the attached.

[Amanda_Kay]

I'm using the DP821 instrument driver but I believe both should be similar in how they work?

[Tim_McClung]

Might take a look at this for driver information if you don't already have it:

http://forums.ni.com/t5/Community-Documents/Rigol-DP832A-Instrument-Driver/ta-p/3512811

Looks like it works with all 800 series devices.  This might give you the driver side of it you'll need.

[Amanda_Kay]

I need a graph like that if the drawing helps any

[NIquist]

If your X (time) axis is in milliseconds I assume you're only collecting data for a couple seconds at most.  Therefore a waveform graph is the most appropriate choice.  Charts are for watching slower events occur in real-time.  You'll also find it easier to setup your time axis using a graph since it will read the dT from your waveform data.

[prettypwnie]

I think we can help better if you let us know what you've tried and what's not working about it. Where are you running into trouble with creating a graph like this?