Max 31855 Thermocouple Shield

[hdhillon90]

Hello there. I bought this shield about a month or so ago and wanted to get some help on an issue I am having. When I upload the code onto the Arduino and open the Serial monitor, the thermocouple has errors, rather excessively. I bought a thermocouple cable from the website and I have it attached to a female adapter which extends the thermocouple further out. The pictures below should explain how my setup is. The end of the thermocouple is a long lead which is used to measure water temperature in a pot. Any Idea why I would get so many thermocouple errors? Thanks

[Franklin97355]

Have you tested the circuit with the thermocouple connected directly to the board? What errors are you getting and what code are you running? Is this a shield or the breakout board?

[hdhillon90]

Yes I have tested the circuit with the thermocouple plugged directly into the board, and this does not cause any errors. Only when i extend it with the female adapter, i get the error in the serial monitor saying Thermocouple error. The code I am using is the one from the adafruit library named serial thermocouple.

[Franklin97355]

The problem seems to be the extension. How far are you extending the leads?

[hdhillon90]

The extension is roughly 3.25 ft.

[adafruit2]

could be something is loose in the extender, or you flipped wires? or the thermocouple is picking up RF and that's messing up the measurements. we've extended a thermocouple by about a meter and it was OK so its *techinically* possible :)

[adafruit_support_bill]

What are you using to extend the thermocouple? Extending it with standard copper wire will defeat the cold-junction compensation and lead to temperature errors. You should only extend a thermocouple with thermocouple extension wire of the same type as your thermocouple (type K in this case).