Is the connection of thermocouple need any signal conditioner if we use a NI USB-6216 Card?

[kukarobot]

I have a NI USB-6216 Card and I want to use it to measure a temperature using a thermocouple but I want to know if I need a signal conditioner circuit in this case

Best regards

[HeatherBaker]

Hi kukarobot,

The USB-6126 has several input ranges including +/- 200mV with an accuracy of 89uV and a sensitivity of 5.2uV.  This is probably still too large of a measurement range for thermocouple measurements and additionally does not address cold-junction compensation (CJC).  This article can be useful in describing the needs and concerns for thermocouple measurements.  If you have the mass termination version of the USB-6216, then you could look toward an SC-2345 or SCC-68 and use the TC02 .  There are also USB options that are made to take thermocouple measurements like the USB-9211A. Hopefully this helps!

[kukarobot]

Dear Baker

Thank you for your reply. In my case I must to use a NI USB-6216 Card so if you suggest to me an electronic interface circuit to make amplification for thermocouple (mv). I use a K-type thermocouple in this project

Best regards

[HeatherBaker]

Hi kukarobot,

These forums are primarily used for users to provide and receive information about National Instruments hardware and software.  While some users may share additional knowledge, you may have more success seeking a dedicated forum to address these concerns.  The article linked in my previous post addresses the points of concern when taking thermocouple measurements.  This information may be useful to take into consideration when building your external circuit.  You can take measurements with the USB-6216 directly; however, the accuracy may not meet your needs as previously mentioned.