Bosch NIT5065UC Use And Care Manual page 12

Empty pans or pans
with a thin base
Cookware detection
Double or triple
cooking element
12
Do not heat up empty pans, or use pans with a thin base. The cooktop has an
internal safety system, but an empty pan could heat up so quickly the "automatic
deactivation" function does not have time to react and the pan could reach a very
high temperature. The pan base could melt and damage the cooktop glass. In the
event this occurs, do not touch the pan and turn off the element. If it does not
function after cooling off, contact technical service.
Each element has a minimum limit for detecting cookware, which varies based on
the material of the pan you are using. Therefore, you should use the element that
best matches the diameter of your pan.
These elements can recognize different sized pans. Depending on the material and
the properties of the pan, the element will automatically adapt, and will activate only
single zone or the entire zone and supply the proper power to provide good cooking
results.