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empierre / arduino-mysensors-contribs

arduino scripts for MySensors IoT
http://www.mysensors.org
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[QUESTION] TGS2602 what is the meaning of ppm parameter in calibration ? #25

Closed david-guenault closed 7 years ago

david-guenault commented 7 years ago

Hi I don't understand what is the meaning of this parameter. Any idea ?

Thx

empierre commented 7 years ago

this is the default so called "clean air calibration", meaning you mesure the voltage in clean air (outside) and set it as reference.

if you have some calibration room with known gas calibration this is much better.