Waveform graph x-axis into real time recording

Hey there,
I have acquired voltage off a LVDT through the DAQ assistant and connected it to a waveform graph. However, the x-axis says its 'Time' but its got the white line running across it even though no time has elapsed and the time itself has funny units to it. What I need on the x-axis is real time so that I can see the line register from left to write as time passes by. I have tried a few things like connecting the DAQ to a chart graph but it doesnt have the log graph which I need. I have also fiddled with the XY graph by connecting the DAQ assistant into the 'Y Input' but I am not sure how to input time into the x input.
If someone could help me with this problem, it would be much appreciated.
Thanks,
Gurung

Hi Gurung,
what do you expect here? Wire waveforms to a chart:
(DAQmxRead settings: n channels, n samples, 1D array of waveforms)
For learning the basics you should
- examine the examples coming with LabVIEW
- go through the Basics course on NI website
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

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"Qod natura non dat, Salmantica non praestat"
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hora_pc.doc ‏63 KB

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This account is no longer active. Contact ShadesOfGray for current posts and information.

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How to save data in a 4D array and make partial plots in real time?

Hi, this is a little complex, so bear with me...
I have a test system that tests a number of parts at the same time. The
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Your help is appreciated, thanks in advance!
germ Remove "nospam" to reply

In article <[email protected]>,
chutla wrote:
> Greetings!
>
> You can use any of the 3D display vi's to show your "main" 3d
> data, and then use color to represent your fourth dimension. This can
> be accessed via the property node. You will have to set thresholds
> for each color you use, which is quite simple using the comparison
> functions. As far as the data is concerned, the fourth dimension will
> be just another vector (column) in your data file.
chutla, thanks for your post, but I don't want a 3D display of the
data....
> Also, check out
> the BUFFER examples for how to separate out "running" data in real
> time.
Not clear to me what you mean, but will c
heck the BUFFER examples.
> As far as autoscaling is concerned, you might have to disable
> it, or alternatively, you could force a couple of "dummy" points into
> your data which represent the absolute min/max you should encounter.
> Autoscaling should generally be regarded as a default mode, just to
> get things rolling, it should not be relied on too heavily for serious
> data acquisition. It's better to use well-conditioned data, or some
> other means, such as a logarithmic scale, to allow access to all your
> possible data points.
I love autoscaling, that's the way it should be.
germ Remove "nospam" to reply

How can I make waveform graph and/or excel file with two different dynamic DBL values?

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Go to Solution.

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Hope this Helps,
Kurt

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