Table of Contents
Advertisement
R-630A (W)
R-630A (IN)
R304 (B}
After any repair, the microwave oven must be checked for
PROCEDURE
microwave leakage to ensure continued safe operation.BS
1. Place the beaker containing the water load in the
EN 60335-2-25
specifies that the maximum
permitted
oven cavity at the centre of the turntable. The
leakage with a load of 275 ml is 50 W/m? (equivalent to 5
placing of this standard load in the oven is impor-
mW/cm? at a distance of 5 cm from the oven.
tant, not only to protect the oven, but also to ensure
that any leakage it is not disguised by too large a
load absorbing energy.
PREPARATION
2. Close the oven door, and with the power level set
The following items are required to carry out this test:-
to FULL, turn the oven ON with the timer set for a
1. A low form of 600 ml beaker made from an electrically
few minutes operation. Should the water begin to
non-conductive material, such as glass or plastic, with
boil before
the test has been completed, it should be
an inside diameter of approximately 8.5 cm. This must
replaced.
contain 275 + 15 mi of water, at an initialtemperature of
3. As shown in the diagram below, move the probe
20 + 2°C.
stowly (not faster than 2.5 cm/sec.);-
2. Aleakage detector which has been calibrated withinthe
a) around the edge of the door following the gap
preceding 12 months toastand whose accuracy canbe
_b) across the face of the door
traced to National Physical Laboratory Standards.
c) across any vents in the oven's sides, rear or top
Recommended instruments are:
Apollo "XI"
Cettec "A100"
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.
28
Advertisement
Table of Contents
