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

[enderWiggin10]

Hi kukarobot,

Themocouples do typically require signal conditioning becuase they have such a small signal and are succeptable to noise because they are antennas.  A low signal input range (minimum for 6216 is -200 to +200 mV) helps to get better resolution with the thermocouple, and a lotpass filter can help to knock off the noise on the line.  This can be done in LabVIEW with a filter.

Also, you can opt for a low-cost TC01 for a single TC or multiple or USB 9211 or 9213 for multiple thermocouples.  The devices have lower input ranges and the filtering built in.

Best,

[kukarobot]

Dear Baker

Thank you for your reply. I use a K-type thermocouple in this project which has a voltage range (-6.548---54.874 mV) and I think that the range -200mV to 200 mV. In my case I must to use a NI USB-6216 Card so if you can suggest to me an electronic interface circuit to make amplification for thermocouple (mv)

Best regards

[enderWiggin10]

Hi xenon,

I did a quick search at sparkfun.com for "amp" and this was a result.

http://www.sparkfun.com/commerce/product_info.php?products_id=306

Hope this helps.  I recommend using a module that already had the cirucitry built in as suggested above, but this is an option that might work.

Best,