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An iron-constantan thermocouple is used to measure the temperature in an oven. The cold junction is at ambient temperature of 82oF (about 28oC), and the thermocouple voltage is 12 mV. Use the given information and the table below to: Determine the voltage at the cold junction. Determine the voltage at the hot junction. Determine the approximate temperature of the oven in oC and o

An iron-constantan thermocouple is used to measure the temperature in an oven. The cold junction is at ambient temperature of 82oF (about 28oC), and the thermocouple voltage is 12 mV. Use the given information and the table below to: Determine the voltage at the cold junction. Determine the voltage at the hot junction. Determine the approximate temperature of the oven in oC and o

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Problem 1:

An iron-constantan thermocouple is used to measure the temperature in an oven. The cold junction is at ambient temperature of 82oF (about 28oC), and the thermocouple voltage is 12 mV.

Use the given information and the table below to:

  1. Determine the voltage at the cold junction.
  2. Determine the voltage at the hot junction.
  3. Determine the approximate temperature of the oven in oC and o
Table 11.3 Thermocouple Voltage (in millivolts) versus Temperature (in °C) for an Iron-Constantan Thermocouple 0 1 2 6 7 3 4 8. 9 °C Millivolts 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 10 0.50 0.56 0.61 0.66 0.71 0.76 0.81 0.86 0.91 0.97 20 1.02 1.07 1.12 1.17 1.22 1.28 1.33 1.38 1.43 1.48 30 1.54 1.59 1.64 1.69 1.74 1.80 1.85 1.90 1.95 2.00 40 2.06 2.11 2.16 2.22 2.27 2.32 2.37 2.42 2.48 2.53 50 2.58 2.64 2.69 2.74 2.80 2.85 2.90 2.96 3.01 3.06 60 3.11 3.17 3.22 3.27 3.33 3.38 3.43 3.49 3.54 3.60 70 3.65 3.70 3.76 3.81 3.86 3.92 3.97 4.02 4.08 4.13 80 4.19 4.24 4.29 4.35 4.40 4.46 4.51 4.56 4.62 4.67 90 4.73 4.78 4.83 4.89 4.94 5.00 5.05 5.11 5.16 5.21 100 5.27 5.32 5.38 5.43 5.48 5.54 5.59 5.65 5.70 5.76 From CRC Handbook of Chemistry and Physics, 55th ed., Cleveland: CRC Press (1974), p. E-109.
Transcribed Image Text:Table 11.3 Thermocouple Voltage (in millivolts) versus Temperature (in °C) for an Iron-Constantan Thermocouple 0 1 2 6 7 3 4 8. 9 °C Millivolts 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 10 0.50 0.56 0.61 0.66 0.71 0.76 0.81 0.86 0.91 0.97 20 1.02 1.07 1.12 1.17 1.22 1.28 1.33 1.38 1.43 1.48 30 1.54 1.59 1.64 1.69 1.74 1.80 1.85 1.90 1.95 2.00 40 2.06 2.11 2.16 2.22 2.27 2.32 2.37 2.42 2.48 2.53 50 2.58 2.64 2.69 2.74 2.80 2.85 2.90 2.96 3.01 3.06 60 3.11 3.17 3.22 3.27 3.33 3.38 3.43 3.49 3.54 3.60 70 3.65 3.70 3.76 3.81 3.86 3.92 3.97 4.02 4.08 4.13 80 4.19 4.24 4.29 4.35 4.40 4.46 4.51 4.56 4.62 4.67 90 4.73 4.78 4.83 4.89 4.94 5.00 5.05 5.11 5.16 5.21 100 5.27 5.32 5.38 5.43 5.48 5.54 5.59 5.65 5.70 5.76 From CRC Handbook of Chemistry and Physics, 55th ed., Cleveland: CRC Press (1974), p. E-109.
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