- This topic has 2 replies, 2 voices, and was last updated 6 years, 1 month ago by Anonymous.
- April 14, 2016 at 6:05 am #9407Sebastian G.Guest
thanks for this usefull Funktion but there seems to be a bug in the calculation.
Mine is showing Temperature in °C and up to 3mV it shows 100°C fine (25°C internal Temp)
4mV 133°C should be 123°C
5mV 183°C should be 150°C
6mV 237°C should be 170°C
7mV 323°C should be 195°C
10.8mV 1135°C should be 290°C
so it shows at the tip of my soldering iron 800°C…
- April 14, 2016 at 11:39 am #9413adminKeymaster
I just ran a test and my readings agree with yours, and on analysis I agree that the issue is in the conversion from voltage to temperature.
I based the calculations off of this document:
Now looking at the implementation and found the issue. The conversion leaves off the top few terms of the polynomial, and the error agrees with your measurements almost exactly. You can see the calculation here:
So thank you for this, I’ll put the correction in the next beta release. I’d like to send you a coupon code as a thank you, can I use the email address you commented with?
- April 14, 2016 at 9:25 pm #9417AnonymousGuest
Yes, may email adress is correct