Good question.
There are different ways to accomplish this task. I've described two ways below.
1. The easiest solution would be to start by creating global channels for each type of measurement. You can create and test NI-DAQmx global channels in the data neighborhood folder that is within Measurement and Automation Explorer (MAX). Simply right-click on the data neighborhood folder and select to create a DAQmx global channel. You will be able to create temperature and voltage global channels. Once you have those global channels configured and tested and everything is working well in MAX, you can move to LabVIEW. You will place a DAQmx global channel control on the front panel and then you can use the DAQmx Timing VI and DAQmx Start and Clear Task VIs
to set the timing, start the acquisition, and stop the acquisition respectively. The linked document below discusses using different global channels within the same program.
How Do I Use Different Types of Global Channels In One Program?
http://digital.ni.com/public.nsf/websearch/3296BA2AEF586B7386256D6D00528E3D?OpenDocument
2. The second method would be to set up a task to take in voltages from all of your SCXI channels. Then you could do the conversion of voltage to temperature within LabVIEW using the Convert Thermocouple Reading VI.
Both ways would work. I would suggest the first method.
I hope this helps.
Regards,
Todd D.
NI Applications Engineer
