Sharp R-24AT Service Manual

R-22AT
R-24AT
31
MICROWAVE MEASUREMENT
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
2
(equivalent to 5
mW/cm
2
) 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”
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
2
(equivalent to 5 mW/cm
2
), it is not normal to detect
any significant leakage, and therefore any detected leakage should be investigated.

Sharp R-24AT Specifications

General

Turntable	-
Clock type	Electronic
Door hinge	Left
Control type	Buttons
Product color	Stainless steel
Door open type	Pull-out
Microwave power	1900 W
Built-in display	Yes
Appliance placement	Countertop
Number of power levels	11
Auto programs quantity	10
Current	13 A
Connected load	2900 W
AC input voltage	230 V
AC input frequency	50 Hz

Weight and Dimensions

Depth	470 mm
Width	510 mm
Height	335 mm
Weight	33000 g
Interior dimensions (W x D x H)	330 x 330 x 180 mm