I am using the type K thermocouple with the AD595. I can get the expected output on the oscilloscope. But when I connected the AD595 with the USB-6001 , in differential mode, the output drops to -2V after regular interval. Even in RSE connection, I am getting the same response. See the attached images
I am not sure why my circuit output is OK on the scope but not with the USB-6001?
Any suggestion how should I connect as I have run out of the ideas.
I also noticed that USB-6001 body gets very warm just after few minutes of powering up, though I am only using my laptop USB port to power it up!
Could it be the internal hardware issue?