1. The time taken to attain the final temperature to be measured
  2. The time taken to attain 50% of the value of initial temperature difference
  3. The time taken to attain 63.2% of the value of initial temperature difference
  4. Determined by the time taken to reach 100°C from 0°C
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1 Answers

Answer: Option 3

The Time Constant of a thermocouple is defined as the time required for the sensor to respond to 63.2% of its total output signal when subjected to a step change in temperature.

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