It can be checked. I don't know about calibration. I think calibrating a digital thermo is just checking the accuracy. I use boiling water, & if I don't hit that 212° mark, then I know mine is off. I haven't had a problem with any of my wireless thermo's yet & I checked (calibrated?) them all. For one of those other "Taylor" like types, where you just stick in the meat, that can be adjusted or calibrated. Of course, if my information is wrong or off a degree° or so, someone will chime in.