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Noisy k Type Thermocouple with SCB-68A

Hello all,

My differential thermocouple reading is fluctuating constantly. I tried moving to a different AI channel and issue still remains. We have determined that the noise is not being created by the environment, and the issue seems to be with the SCB-68A. I was reading the manual for the SCB-68A and it mentions adding high value resistors to the board to help with noise. This didn't seem to help either (unless I am placing them in the wrong spot or using the wrong resistor values). Any advice and/or suggestions would be greatly appreciated. TIA!

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I suggest reviewing this KB as a first step. https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P8wxSAC&l=en-US

Malkolm A.
Applications Engineer
National Instruments
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