thermocouple cold junction

[hesc_1314511]

hello, I am using an external opamp for a K typethermocouple, I am using thmocouple component in Psoc Creator, the question is, how can I connect a NTC for cold junction compensation? is there a code example?

Thanks

Henry

[odissey1 · Accepted solution]

Henry,

I don't think that PSoC provides cold junction compensation. For cold junction compensation one needs something like MAX31855 module, which has calibrated voltage generator inside, which "fakes" cold junction voltage:

https://www.adafruit.com/product/269 

https://datasheets.maximintegrated.com/en/ds/MAX31855.pdf

(Notice 5V->3.3V LDO at the top.)

I would like to warn you that there are cheap clones of that module on the Internet, which are counterfeit. They are typically 3.3V only, have wrong PCB layout and some even come with a fake chip (that is what I got, you can google fake chip series).

/odissey1