B
I understand the basics of thermocouples. If you use the wrong extension cable, you create a thermocouple at the end that connects with the thermocouple. However I have been searching high and low to find some information of how to approximate this error (I understand it is probably not linear as well).
So if you have a Type K thermocouple connected to a Type T compensating cable you have three junctions.
1) Ni Cr vs Ni Al (The "main" junction)
2) Ni Cr vs Cu (the +ve side junction)
3) Ni Al vs Cu Ni (the -ve side junction)
What I haven't been able to find is any information about the seebeck <b><i>(moderator's note: setback?)</b></i> voltage produced over junctions 2 and 3. My understanding is that if I could get that information I could provide a rough estimate of the error created by having the wrong type of compensating cable.
So if you have a Type K thermocouple connected to a Type T compensating cable you have three junctions.
1) Ni Cr vs Ni Al (The "main" junction)
2) Ni Cr vs Cu (the +ve side junction)
3) Ni Al vs Cu Ni (the -ve side junction)
What I haven't been able to find is any information about the seebeck <b><i>(moderator's note: setback?)</b></i> voltage produced over junctions 2 and 3. My understanding is that if I could get that information I could provide a rough estimate of the error created by having the wrong type of compensating cable.