[TheForge] K thermocouple

[Hochewa at aol.com]

To All,
And another thing....
Thermocouple tables relate T vs mV outputs against a reference  junction of 
usually 0*C.  Handheld units are self referencing.  Type K  may not be the best 
considering the normal range at which they are used and the  atmospheres most 
suited to them.  Omega is a gold mine of thermocouple  information.
 
Hochewa
 
In a message dated 11/17/2005 7:24:49 P.M. Eastern Standard Time,  
jbin at well.com writes:

You  really need a way to amplify and linerize the thermocouple output   
voltage as it is not a linear degree/volt output. There are  dedicated  
meters called pyrometers that correct some of this with  their  
calibration on the faceplate. Go to  http://www.omega.com/temperature/ 
Z/pdf/z021-032.pdf for a polynomial  formula that will allow you to  
figure out what voltage corresponds  to what temperature. You will  
need a very accurate meter as the  voltage output from a type K  
thermocouple is a maximum of 50  millivolts (.05 volts) .  To see a 1  
degree C change you will  need a meter that has a sensitivity of . 
00004 volts or  beter.

Jim