Daewoo KOR-3000 Service Manual download pdf (Page 26)

Microwave output power can be checked by indirectly measuring the temperature rise of a certain amount of water

exposed to the microwave as directed below.

PROCEDURE

1. Microwave power output measurement is made with the microwave oven supplied at rated Voltage and operat-

ed at its maximum microwave power setting with a load of 1,000 ±5cc of potable water.

2. The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm

and an outside diameter of approximately 190 mm.

3. The oven and the empty vessel are at ambient temperature prior to the start of the test.

The initial temperature of the water is 10 ±2˚C.

It is measured immediately before the water is added to the vessel. After addition of the water to the vessel, the

vessel, the Ioad is immediately placed on the center of the shelf which is in the Iowest normal position.

4. Microwave power is switched on.

5. Heating time should be exactly 70 seconds.

Heating time is measured while the microwave generator

is operatng at full power.

The filament heat-up time for magnetrons is not included.

6. The initial and final water temperatures are selected so

that the maximum difference betwen the ambient and

final water temperatures is 5K.

7. The microwave power output P in watts is calculated from the following formula:

•

▲▲T is actual temperature rise.

• t is the heating time.

The power measured should be 600W ±10.0˚C

Tray

Water Load

P=4187 X ▲▲ T / t

CAUTION:

1. Water load should be measured exactly to 1 liters.

2. Input power voltage should be exactly 220 volts as specified.

3. Ambient temperature should be 20 ±

2˚C

(68 ±3.6F)

MICROWAVE RADIATION TEST

WARNING

Make sure to check the microwave leakage before and after repair or adjustment.

• Always, start measuring of an unknown field to assure. Safety for operating personnel from microwave energy.

• Do not place your hands into any suspected microwave radiation field unless the safe density level is known.

• Care should be taken not to place the eyes in direct line with the source of microwave energy.

• Slowly approach the unit under test until the radiometer reads an appreaciable microwave leakage from the unit

under the test.

MEASUREMENT OF THE MICROWAVE OUTPUT POWER

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Daewoo KOR-3000 Service Manual Page 26