2017-02-27, 07:23 PM
Hi,
I've connected a number of ds18b20 temp sensors via a DS9490R adapter, and got it all plotting data as described here:
http://www.tiarora.no/plott-av-vind-og-temperaturer/
I am however seeing about 1-2 C in variation between the sensors, and was wondering if there is any way to calibrate them? Hoping the error is linear I figured it may be possible to simply introduce an offset for a particular sensor, but I can see no such option in OP.
I was under the impression these things came calibrated but it seems I may have bought too cheap ones or something...
Thanks,
Otto
I've connected a number of ds18b20 temp sensors via a DS9490R adapter, and got it all plotting data as described here:
http://www.tiarora.no/plott-av-vind-og-temperaturer/
I am however seeing about 1-2 C in variation between the sensors, and was wondering if there is any way to calibrate them? Hoping the error is linear I figured it may be possible to simply introduce an offset for a particular sensor, but I can see no such option in OP.
I was under the impression these things came calibrated but it seems I may have bought too cheap ones or something...
Thanks,
Otto