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R-T-Curve

A project log for DIY Soldering Station Musings

A collection of ideas/projects and my personal take on it

Stefan LochbrunnerStefan Lochbrunner 03/07/2016 at 21:160 Comments

I made a quick measurement to see how linear the iron's temperature sensor is. Since I don't have a thermocouple I used a Pt1000 strapped to the heating element like this:

So I had one DMM measure the Pt1000's resistance and another one measure the resistance of the iron's sensor. Afterwards I calculated the temperature from the Pt1000's values and came up with this graph:

Internal sensor - primary (left) y-axis; Pt1000 - secondary (right) y-axis

Good (as in linear) enough I guess...

(At lower temperatures you can see that I had the second DMM set to a too high resistance range, hence the steps)

Some more info:

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