Panasonic NNCD58JS Betriebsanleitung PDF herunterladen (Seite 20)

20

20

Microwave energy has been used in

this country to cook and reheat food

since early experiments with radar in

World War II. Microwaves are present

in the atmosphere all the time, both

naturally and from manmade sources.

Manmade sources include radar, radio,

television, telecommunication links and

mobile phones.

How Microwaves Cook Food

Reection

The microwaves bounce off the metal

walls and the metal door screen.

In a microwave oven, electricity is

converted into microwaves by the

magnetron.

Transmission

Then they pass through the cooking

containers to be absorbed by the water

molecules in the food, all foods contain

water to a more or lesser extent.

The microwaves cause the water

molecules to vibrate which causes

friction, i.e. heat. This heat then

cooks the food. Microwaves are also

attracted to fat and sugar particles,

and foods high in these will cook more

quickly. Microwaves can only penetrate

to a depth of 1½-2 inch (4-5 cm) and

as heat spreads through the food by

conduction, just as in a traditional

oven, the food cooks from the outside

inwards.

Note

The dish used to cook or

reheat the food will get warm

during cooking, as the heat

conducts from the food. Even in

microwaving, oven gloves are

required!

Microwaves cannot

pass through metal and

therefore metal cooking

utensils can never be used in

a microwave, for cooking on

microwave only.

Foods Not Suitable for Cooking

by Microwave Only

Yorkshire puddings, soufes, double

crust pastry pies. This is because these

foods rely on dry external heat to cook

correctly, do not attempt to cook by

micro wave. Foods that require deep fat

frying cannot be cooked either.

Standing Time

When a microwave oven is switched

off, the food will continue to cook

by conduction – not by microwave

energy. Hence standing time is very

important in microwaving, particularly

for dense foods i.e. meat, cakes and

reheated meals (Refer to page 21).

Boiled Eggs

Do not boil eggs in your

microwave. Raw eggs boiled

in their shells can explode and

cause serious injury.

Microwaving Principles

Magnetron

Oven Cavity

Turntable

Waveguide

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