How to acquire and save the analog voltage values from DAQmx (I don't want the graph, but channels and values in a chart)?

[Jshen6]

Hi,

How to acquire and save the voltage values from DAQmx?

I tried several example code, but they can only get the graph. I don't want graph. I want to measure the exact values of analog voltage and save those values -- like an excel chart, which contains the selected channels and the voltage values.

Which example code can I use?

My hardware is NI PCI 6251.

Thanks a lot.

[Dennis_Knutson]

You say you want a chart. Do you really mean you want a table? There are several examples of saving data in the DAQmx examples. Simplest perhaps is to use the Write to Measurement File function.

[Jshen6]

Yes. I want to a table to display the data instead of graph and save the data. Is there any example code for that?

[Dennis_Knutson]

Yes. Help> Find Examples.

[Jshen6]

Yes. I mean I want to use a table to display the data on the screen (I found some examples which can acquire data in graph, but I want a table) and save the data. Is there any example code? Thanks a lot.

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@Dennis_Knutson wrote:
You say you want a chart. Do you really mean you want a table? There are several examples of saving data in the DAQmx examples. Simplest perhaps is to use the Write to Measurement File function.

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[Jshen6]

But the examples I found, which can acquire data, is in a graph not in a table. I need to do some further calibration about the data. I need exactly values so that I can convert voltages from DAQmx card into water content. So I want the data collected in a table like excel.

[Dennis_Knutson]

Did you try anything? A table is simply a 2D string array. Use a string conversion function. Saving the data is exactly the same. The display (table or graph) is irrelevant.

[Bijay]

Hi 

Refer this attached vi and modify as per your requirement.

Regards,

Bijay

[Jshen6]

Thank you so much!

But my Labview version is 8.5.1. Your version is newer than me, so I can't open the file. How can I convert it into my version. Sorry I am new to Labview.

Thanks a lot. 

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Bijay wrote:

Hi 

Refer this attached vi and modify as per your requirement.

Regards,

Bijay

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[Bijay]

Hi,

Try this vi.

Regards,

Bijay