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Topic: Adjusting DS18B20 readings (Read 703 times) previous topic - next topic

Mikee

Hi Guys, I have a Question, readings from my 4 DS 18B20 sensors on One wire thru 4,7 resistor are 0,2 -0,3 °C under real Temperature (measured with calibrated thermometer).
How can I adjust sensors? Will work replacing resistor with potentiometer ?
Thanks

terryking228

Hi,
No these are digital devices. I believe you CAN buy higher-price more accurate units.

Why not "Fix it in Software"?? 
Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

Mikee

Aaah, math function in Arduino code.. Thats simple a can work, thanks for Idea..

robtillaart

fixing it in software can be from simple to complex, basicly 4 steps ...

1) adjust all sensors with same offset
2) adjust every sensor its own offset
3) adjust all sensors with a temperature dependant offset - have you tested if the offset is constant over a temperature range?
4) adjust every sensor with its own temperature dependant offset ...

my 2 cents,
rob
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

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