Some you can calibrate, most you can't. What they are saying is if your therm reads 205 in boiling water. Then you would want to add 7 degrees to the temp your smoking at. So if you want to check your smoker temp & you are looking for 225, then you would want your therm to read 232.maybe I missed it or stupid question, but if you put in boiling water and does not read 212 how do you calibrate it?? Thanks cause mine are off also.
mine are CNR or something like that I dont think I have a cal. button on mine