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Thermocouple-Uses and how it Works?

by PWhiting1
Tags: thermocoupleuses
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Jan11-08, 03:44 PM
P: 2
1. The problem statement, all variables and given/known data
I need to investigate how current in a diode varies with extreme temperatures. I have no idea how to do this but could a thermocouple somehow be incorporated into the investigation.

2. Relevant equations
Can a thermocouple be used to investigate this

3. The attempt at a solution
I have no idea how a thermocouple works or what it exactly does, so i have no attempted solutions.
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Jan11-08, 03:48 PM
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Not sure what you mean by looking at the current in the diode.
An intersting (and useful) property of diodes is that the forward voltage drop depends on temperature - this is used as a temperature sensor.

It doesn't really matter what you use as a sensor to make your measurements, thermocouples have the advantage that they are fairly small and so can be easily attached to a diode. You will need a thermocouple reader - some digital voltmeters have them built in.

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