Sharp R-23AM Manuel de service télécharger pdf (Page 37)

R-22AT

R-23AM

R-24AT

MICROWAVE MEASUREMENT

Before commencing the test, check that the leakage

detector is functioning and adjusted according to the

manufacturer’s instructions, and any spacers are fitted to

ensure that measurement is taken 5cm from the surface of

the oven.

PROCEDURE

1. Place the beaker containing the water load in the oven

cavity at the centre of the turntable. The placing of this

standard load in the oven is important, not only to

protect the oven, but also to ensure that any leakage it

is not disguised by too large a load absorbing energy.

2. Close the oven door, and with the power level set to

FULL, turn the oven ON with the timer set for a few

minutes operation. Should the water begin to boil

before the test has been completed, it should be

replaced.

3. As shown in the diagram below, move the probe slowly

(not faster than 2.5 cm/sec.);-

a) around the edge of the door following the gap

b) across the face of the door

c) across any vents in the oven’s sides, rear or top

Dotted line indicates the path taken by the leakage

detector.

Whilst the maximum leakage permitted in BS EN 60335-2-25 is 50 W/m

(equivalent to 5 mW/cm

), it is not normal to detect

any significant leakage, and therefore any detected leakage should be investigated.

After any repair, the microwave oven must be checked for

microwave leakage to ensure continued safe operation.

BS EN 60335-2-25 specifies that the maximum permitted

leakage with a load of 275 ml is 50 W/m

(equivalent to 5

mW/cm

)

at a distance of 5 cm from the oven.

PREPARATION

The following items are required to carry out this test:-

1. A low form of 600 ml beaker made from an electrically

non-conductive material, such as glass or plastic, with

an inside diameter of approximately 8.5 cm. This must

contain 275 ± 15 ml of water, at an initial temperature

of 20 ± 2˚C.

2. A leakage detector which has been calibrated within

the preceding 12 months to a stand whose accuracy

can be traced to National Physical Laboratory Stand-

ards.

Recommended instruments are:

Apollo “XI”

Celtec “A100”

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Sharp R-23AM Manuel de service Page 37

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