Select a Vi to acquire, save and read continuous analog voltage

[Intern2005]

Hello, Thanks fro this information but at the moment I prefer keeping the DAQ assistant vi and save under *lvm and open it with Diadem then since I don't have the version8.0 and no connectivity tools.

So I'd like to discuss about the multichannel acqusition with my DAQ board. I am using the DAQ assistant VI (please see captured files enclosed). The problem is that I know now that I can acquire several channels (configuration in MAX with NI DAQmx), in my case 2 channels: analog input0 and analog input2.

So I know I can display those 2 channels on a graph, but I'dlike to display each channel on a different graph.

For example I have 2 loads to measure, I would like to display:
- Channel0 on graph1
- Channel2 on graph2

Is this possible with DAQ Assistant? Do I have to use a feature like "Build array" or else...?

Thanks very much for quick reply

B. Tafati

[Ulrich_Bierwisch]

Hi,

The blue wire (dynamic data Type) can transport a large number of channels. If you need one ore more of these channels, you can use the functions "Split Signal" or "Select Signal" from Signal Manipulation.

[Intern2005]

Hi,

I tried it and it works fine.

Thanks very much, you're fantastic

Greats

[Intern2005]

Hello,

I would need one of your good advices.

I would like to save some headers and I don't know how. I would like to perform it while saving the graphs.
I tried to put them in clusters but it is not possible to save them in the Write LabView Measurement File.vi because the inputs are signals and comments which require string and not clusters.

Anyone has an idea?

Thanks

PS: Please see the 2 files enclosed

[Ulrich_Bierwisch]

Hi,

lvm is a file format which is easy to write and easy to read but with very limited capabilities. It is designed to just save your values and load them again with LabVIEW, DIAdem or Excel. You can put some Information into the Comments, but you also need someone to read and understand the Comments.

If you are thinking about saving your measurments together with header information and if you expect to do a huge number of tests and you have to find or sort older tests acording to different criterias in this headers, lvm is not the best solution. In this case you have to put some work into saving everything into the tdm format which Brad mentioned above. This format is designed exactly for this and the newer DIAdem versions are ready to read everything.

Old test results can be worth a lot if you have used a well defined file format which still can be read and interpreted years after the test.