Adjusting DS18B20 readings

Using Arduino Sensors
1

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

2

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

Why not "Fix it in Software"??

3

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

4

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