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USB-2408 TC Noise

Alex Breves


I am struggling to get reliable tc data from my USB-2408. I am using that close to high voltage inverters (up to 1000V DC input) with switch frequency of 20KHz+. I also have another TC data acquisition system (from a competitor) that doesn't suffer of the same illness.

If I operate my inverter up to +/- 50V DC, the noise is minimum. Above that, the signal is useless.


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Hello @Alex Breves.

The USB-2408 is sensitive to surrounding equipment generating EMF signals.  Try shielding the USB-2408 module and use shielded thermocouples.  Additionally, set the data rate to 60 Hz, in InstaCal, to help with some of the noise.





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