I have made some progress on the schematic. Most of the components are down, but I have not calculated many of the values yet. As you can see, we are just using the AD8494 thermocouple amplifier combined with the AMC11000 for isolation. There is also a selectable division so the output can go to either 50 deg C full scale or 500 deg C full scale. This corresponds to 0.1V/(deg C) or 0.01V/(deg C) respectively. Other than that there are just a bunch of linear regulators to generate different power rails, and a low battery detection circuit.