Question

The neutral temperature of a thermocouple is $350^{o} ⥂ C$ when the cold junction is at $0^{o} ⥂ C.$ When the cold junction is immersed in a bath of $30^{o} ⥂ C,$ the inversion temperature is

• A. $700^{o}C$
• B. $600^{o}C$
• C. $350^{o}C$
• D. $670^{o}C$

Answer 1

Answer: (D)

$670^{o}C$

Answer 2

$t_{i} = 2t_{n} - t_{c}$ ⇒ $t_{i} = 2 \times 350 - 30 = 670^{o}C$