I have a TC-08 and would like to use a differentially configured thermocouple with it, using Type T thermocouple materials (copper and copper-nickel). In other words the arrangement that I seek is with a copper wire leaving the thermcouple plug, to form a welded joint with the copper-nickel wire, which then forms another welded joint with a third copper wire, which return back to the thermocouple plug-end. This arrangement, as I understand it, provides a very precision measuement of the difference in temperature between the two welded joints.
The reason I don't want to just use two seperate thermocouples plugged into the TC-08 is that whenever one of the plugs is moved or nudged, it changes the measured temperature difference between the two thermocouples.
So, how can I configure the TC-08 to interpret the difference intemperature between the two welded jints for a differentially confgured type T thermocouple??