Reading AI and thermocouple reading using virtual channels

Hi All
This is the configuration of my apparatus
SCXI 1102- thermocouple readings
PCI-MIO-16E-4 card
i want to read both analog inputs (from a front feedthrough panel) and a thermocouple reading simulataneously. I tried defining the channels as DAQmx global channels and tried to use the specific DAQmx polmorphic VI to read both the AI and the thermocouple reading simultaneously. But it looks like the AI affects the thermocouple reading. When i change the AI, the thermocouple reading also gets erratic(changes to lower values, sometimes even negative). Can anyone help me on this. Im absolutely new to this. Excuse me if the question was pretty trivial. Thanks a million
sambar

Sambar,
To which pins on the feedthrough panel are you connecting your signal? Make sure you are not connecting it to channel 0. All of your SCXI channels are multiplexed to channel 0 on your PCI-MIO-16E-4. If you are unsure of the pinout of your feedthrough panel, the KnowledgeBase linked below provides this information:
Pinout for the SCXI-1302 50-Pin Terminal Block
Good luck with your application.
Spencer S.

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