A magnetron cannot be
controlled continuously.
When it is functioning, it
always runs at 100%. In
order to get a capacity
control, one pulses the
switch-on duration, i.e. the
desired capacity is
achieved by switching on/
off the magnetron over a
certain period of time. The
same principle as e.g. in
ovens or with hot plates.
A timing cycle is normally
29/30 seconds.
<(example 29 sec).
If 48(50)% capacity is
required, that means
14(15) seconds ON and
15 seconds OFF.
The timing cycles can
differ a little bit due to the
different
types
(electronic/timer), the
principle is always the
same!
Thus, 10 of these cycles
will pass within 5 min.
Following important note:
Never switch on a microwave oven without
energy-absorbing food in the oven. If despite
that microwave energy is fed to an empty
oven, these waves work off their energy
where it is not welcome.
It results in sparks and scorch spots.
In the worst case, there will be a reaction on
the anode resp. antenna of the magnetron,
which may even be destroyed!
Microwave-Capacity
created by TSE-N, Reiner Kurzke
Page 8
