Thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) - help
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Thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) - help

by Giselly on Sat Nov 24, 2012 2:59 pm

Hello, I am looking to buy the thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) and I wonder if the thermocouple selling for you, this or this link in the MAX31855 thermocouple amplifer goes up to 1000 degrees Celsius (temperature of Brazil). If not, what would you use the thermocouple with the thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) to measure 1000 degrees celsius?
Grateful for the attention.
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Re: Thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) - help

by adafruit_support_bill on Sat Nov 24, 2012 4:00 pm

Any K-type thermocouple will work with the MAX31855. But to operate at that temperature, you need a special probe with ceramic insulation. They are available from Omega: http://www.omega.com/ppt/pptsc.asp?ref=XC&Nav=tema06
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Re: Thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) - help

by chimpymaster on Thu Dec 13, 2012 10:40 am

Hi there
can a K type thermocuple read below zero ºC temperatures accuratly ?
I need to go till 77 K liquid nitrogen

thanks
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Re: Thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) - help

by adafruit_support_rick on Thu Dec 13, 2012 10:44 am

K-types go down to -200C. Here's a good discussion of thermocouples:
http://www.omega.com/prodinfo/ThermocoupleSensor.html

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Re: Thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) - help

by chimpymaster on Thu Dec 13, 2012 10:50 am

thanks a lot Driverblock :) (im such a fist time user of this stuff)
So I have another question maybe you know the answer,
If I buy a thermocouple, a Max31855 chip and I upload to the Arduino Uno the Adafruit library, do I have to somehow calibrate the thermocouple ? or is it ready to use because of the software buy adafruit ?
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Re: Thermocouple amplifier MAX31855 Breakout Board (MAX6675 update) - help

by adafruit_support_bill on Thu Dec 13, 2012 11:01 am

All thermocouples need to be calibrated against a reliable reference temperature. Omega has some good white-papers on calibration techniques.
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