Acquire thermocouples with DAQ 6062E

[superfunk]

Hi everyone,

I am asked to acquire a bunch of thermocouples with a DAQ 6062E card (and SC2345) but I am wondering if it is possible or not. The smallest input range is 100mV and with a resolution of 12bits, it gives a resolution in volts of 0.0244 mV or 24uV. If I compare this value to the NIST table of type K thermocouple (in celsius degrees) :

1°C: 0.039 mV

2°C: 0.079 mV

So I should get a resolution of less than 1°C. Even if it is not the best card for that application...

Thanks for your help

Christophe.B

[MatthieuR · Accepted solution]

Hello,

The card got a finer resolution than the sensor himself.

Your problem  should come from your sensor.

Resolution of a K type sensor : 41 microVolts per degree Celsius

http://digital.ni.com/public.nsf/allkb/8166630BD6965EEA86256FDD0052E89C?OpenDocument

[superfunk]

Hi,

Thanks for your answer and the interesting link.

We will proceed with K-type thermocouples.

Christophe