Find the neutral temperature and inversion temperature of copper-iron thermocouple
Find the neutral temperature and inversion temperature of copper-iron thermocouple if the reference junction is kept at 0°C. Use the data in table (33.1).
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θ = 0°C
aCu,Fe = aCu,Pb – aFe,Pb = 2.76 – 16.6 = -13.8 μv/°C
BCu,Fe = bCu,Pb – bFe,Pb = 0.012 + 0.030 = 0.042μv/°C2
Neutral temp. on - a/b = 13.8/0.042°C = 328.57°C
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