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Inst Tools > Blog > Practical Questions > Type E thermocouple Calculations

Type E thermocouple Calculations

Last updated: June 6, 2018 9:48 am
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Type E thermocouple

Calculate the amount of voltage “seen” by the voltmeter given the following measurement and reference junction temperatures:

Type E thermocouple

  • T1 = 233 oC ; T2 = 31 oC ; T3 = 25 oC ; Vmeter = __________ mV
  • T1 = 348 oC ; T2 = 40 oC ; T3 = 16 oC ; Vmeter = __________ mV
  • T1 = −161 oC ; T2 = −4 oC ; T3 = 23 oC ; Vmeter = __________ mV
  • T1 = 836 oC ; T2 = 34 oC ; T3 = 19 oC ; Vmeter = __________ mV

Answer :

All answers based on ITS-90 thermocouple table values:

  • T1 = 233 oC ; T2 = 31 oC ; T3 = 25 oC ; Vmeter = 14.395 mV
  • T1 = 348 oC ; T2 = 40 oC ; T3 = 16 oC ; Vmeter = 23.856 mV
  •  T1 = −161 oC ; T2 = −4′oC ; T3 = 23 oC ; Vmeter = −9.039 mV
  • T1 = 836 oC ; T2 = 34 oC ; T3 = 19 oC ; Vmeter = 62.701 mV

Note: all temperatures at T2 are irrelevant because this is a junction between similar metals (type E wires connecting to corresponding type EX extension wires). The reference (cold) junction is where the type EX wires connect to copper, at temperature T3.

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