How can i messure temp on 2 diff channels simultaneous on a USB-9161 Carrier ?

Hello, I was wondering if u can help me with a small problem, with my USB-9161 Carrier. I intend to messure temperature with two thermocouples on 2 physical channels of the device, in the same time. Do i need a special VI for this operation ? As far as I have seen the VI promps me to select a single phisical channel. Can I record data for both thermocouples? Thank you so much

Hi Tzaca,
Can you clarify which module you are using within your 9161 Carrier. The 9161 does not contain any data acquisition functionality by itself but enables certain C-Series modules to interface with your PC via USB. For Thermocouple measurements the ideal module would be the NI 9211 for your purpose, however other modules will work that contain the appropriate signal conditioning. I.e. Cold Junction Compensation (CJC).
Assuming you have an appropriate module however you can record from both thermocouples using a LABview programming technique called synchronization. I have found an article on the NI Developer Zone website that explains this principle well using LabVIEW 2010. Take a look at this and see how you get on.
Easily Synchronize Your Measurements in LabVIEW 2010
http://zone.ni.com/devzone/cda/tut/p/id/11549
If you need any more assistance with this let me know how you get on and I'll try and help you further.
Matt T
Matthew Trott
Applications Engineer
National Instruments UK
www.ni.com/ask

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