Thermocouple Circuit
Thermocouple Circuit
(OP)
I've decided to make my own digital thermometer as a side project. I want to use a type K thermocouple as the sensing element. I'm using a PIC16F777 micro with an LCD output. I've got code (using picbasic pro) that will display the ADC to the LCD. I'm looking for information that will help me linearize the Thermocouple. I'm assuming it will be a mix of ciruitry and code. If anyone has any app notes, or can point me in the right direction it would be greatly appreciated.
Thanks
Thanks





RE: Thermocouple Circuit
Look at the tech notes on Omega's website.
Go with a lookup table.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Thermocouple Circuit
RE: Thermocouple Circuit
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Thermocouple Circuit
This should help.
RE: Thermocouple Circuit
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Thermocouple Circuit
Thanks Madcow, I'll start with the app note you provided.
RE: Thermocouple Circuit
RE: Thermocouple Circuit
http://www.analog.com/en/prod/0,2877,AD595,00.html
has built in CJC, as long as you keep the TC termination as close to the IC pins you're golden.
RE: Thermocouple Circuit
I agree that chip works well JKelly.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Thermocouple Circuit