Sharp Carousel R-880FS Servicehandleiding - Pagina 34

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R-880F(S)

After adjustment of door latch switches, monitor switch

and door are completed individually or collectively, the

following leakage test must be performed with a survey

instrument and it must be confirmed that the result meets

the requirements of the performance standard for micro-

wave oven.

REQUIREMENT

The safety switch must prevent microwave radiation emis-

sion in excess of 5mW/cm

external surface of the oven.

PREPARATION FOR TESTING:

Before beginning the actual test for leakage, proceed as

follows;

1. Make sure that the test instrument is operating nor-

mally as specified in its instruction booklet.

Important:

Survey instruments that comply with the requirement

for instrumentations as prescribed by the performance

standard for microwave ovens must be used for test-

ing.

mW cm

MICROWAVE MEASUREMENT

at any point 5cm or more from

Microwave leakage measurement at 5 cm distance

Recommended instruments are:

NARDA 8100

NARDA 8200

HOLADAY HI 1500

SIMPSON 380M

2. Place the oven tray into the oven cavity.

3. Place the load of 275

5˚C in the centre of the oven tray. The water

container should be a low form of 600 ml beaker with

inside diameter of approx. 8.5cm and made of an

electrically non-conductive material such as glass

or plastic.

The placing of this standard load in the oven is impor-

tant not only to protect the oven, but also to insure that

any leakage is measured accurately.

4. Close the door and turn the oven ON with the timer set

for several minutes. If the water begins to boil before

the survey is completed, replace it with 275ml of cool

water.

5. Move the probe slowly (not faster that 2.5cm/sec.)

along the gap.

6. The microwave radiation emission should be meas-

ured at any point of 5cm or more from the external

surface of the oven.

15ml of water initially at 20