Sharp Carousel II R-3A54 Manual de serviço - Página 26
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R-3E54
MICROWAVE
MEASUREMENT
After
adjustment
of
door
latch
switches,
monitor
switch
and door are completed
individually
or collec-
tively,
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 microwave
oven.
REQUIREMENT
The safety
switch
must prevent
microwave
radiation
emission
in excess of 5mW/cm2
at any point
5cm or
more from 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
normally
as specified
in its instruction
booklet.
Important:
Survey
instruments
that comply
with
the require-
ment for instrumentations
as prescribed
by the per-
formance
standard
for microwave
ovens
must be
used for testing.
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&l
5ml of water
initially
at
20f
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 im-
portant
not only to protect the oven, but also to in-
sure 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.
(RDBllOSU)
Microwave
leakage
measurement
at 5 cm distance
28