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Single circle cooking zones have one heating element, whilst
double circle (vario) cooking zones and extended zones have
two. Depending on model, the heating elements may be
separated by an isolating ring.
Each cooking zone has overheating protection (a
temperature limiter), which stops the ceramic surface from
becoming too hot (see "Overheating protection").
When a power level is selected, the heat switches on and the
element can be seen through the ceramic surface.
The temperature of the cooking zones depends on the power
level selected, and is electronically regulated. This controls
the "timing" of a cooking zone, switching the element on and
off.
Single circle zone
a Overheating protection
b Heating element
Double circle zone
a Intentional gap
b Overheating protection
c Outer heating element
d Isolating ring
e Inner heating element
How the cooking zones work
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