Max31855 breakout Board

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geoff_c
 
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Max31855 breakout Board

Post by geoff_c »

Looking at the Max31855 Breakout Board I see you attach the thermocouple wire to a terminal block. Is that a special thermocouple terminal block or just a normal one. In the old days we used to have to themocouple to copper wire transistion in a ice bath at 0 degrees C as the thermocouple tables were referenced to 0 deg C. I relize that what is done now is compensation with a internal sensor but most terminal blocks are nickel plated and not copper, just wondering if that makes any difference

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adafruit_support_bill
 
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Re: Max31855 breakout Board

Post by adafruit_support_bill »

Since the thermocouple voltage is a function of the temperature gradient over the length of the probe, what is important for accurate measurement is that the 'cold-junction' compensation sensor in the chip is at the same temperature as the terminal block.

geoff_c
 
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Re: Max31855 breakout Board

Post by geoff_c »

Okay, thanks for the info

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