Calibration that has to be done - difference from measured and station is between 70-100° - too much and I have to do it twice because on some tips it does not storage it correctly. Would not be that bad if it remains in memory, unfortunatly if you disconnect station for some days you have to calibrate again and sometimes it displays error if I boost temperature - impossible to reach 400° with most tips. I did calibration and burn in for all 6 tips, I also fixed problem of motion sensor in iron (was soldered in wrong direction). Termometer was calibrated with Fluke tc
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