Acquiring data from RTD sensors (for temperature measurement)

[amiroo]

Hi all.

I am going to get data from two RTDs (It is a sensor for temperature measurement). Previously I used thermocouples and I have a VI for the thermocouples. Is the same VI applicable for the RTDs if I only create a new task in temperature analog data acquisition in MAX?

Thanks.

[mikeporter]

Well, sort of. Check out the link:

http://digital.ni.com/public.nsf/allkb/5BFB36CFCC32C662862570D5006DC0C0

MIke...

[amiroo]

Thanks.

I used NI 9213 for my thermocouples and now I am going to use NI 9217 for my RTDs. I mean if I create a new task in DAQmx for RTDs instead of thermocouples, can I use the same VI that I used for my thermocouples?

[mikeporter]

Yes.

Mike...

[Hooovahh]

When reading a Virtual Channel or Task, the VI references that by name.  So if in MAX or in your project you have channels defined by a name, then the VI simply needs to know the name to do the reading.

If you had a -10V to 10V DAQ signal to read, and you made a virtual channel called Temperature, the normal Read VI can read that if you tell it to read "Temperature".  No configuring is needed because MAX knows the settings like physical channel, scale, units, and several others.  So if you made a virtual channel for your thermocouple read called "Temperature" and used the same Read it would work just the same.  The only thing that may need to change is the name of the virtual channel or task to read if you changed it.

The beauty of MAX.  This is why I try to make Virtual Channels for everything.  Then someone can update the scale, or move the channel, without needing to update the software.