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Step input or ramp input

  1. Jan 31, 2015 #1
    Is input to a thermocouple a step or ramp?
     
  2. jcsd
  3. Jan 31, 2015 #2

    Baluncore

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    Welcome to PF.

    Can you rephrase your question or give more details?
    The input is a temperature. A thermocouple generates a very small voltage that is proportional to voltage.
    http://en.wikipedia.org/wiki/Thermocouple
     
  4. Jan 31, 2015 #3
    a thermocouple is a single capacity system..so when immersed in water bath what would be the input to the thermocouple at that instant....is thAT a ramp input or step input??
     
  5. Jan 31, 2015 #4

    Baluncore

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    An instant change must be a step. A thermocouple has thermal mass so it will take time to exponentially settle towards a final value. That is closer to a ramp than a step. What is the time constant of the thermal change?
     
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