Review on Thermometer B.Well WF-4000 white by Mateusz Grzesiak  (M ᠌

A very normal device! There are nuances of use. __ About MEASUREMENT. Hold the button until the "sound" appears and the measurement results are displayed on the screen (in fact, no more than 2 seconds). __ About parameter F4. Measure with a mercury thermometer, and then with a non-contact infrared thermometer (repeat several times): for example, mercury averages 36.6, and B. Well shows 36.9, then enter F4=0.3. That is, correct for yourself the specific static measurement error between the "reference" mercury - and B. Well (the specifics of your skin for infrared radiation). Good luck everyone!