Advertisement
R-9380
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.
2.
3.
4.
5.
6.
Recommended
instruments
are:
NARDA
8100
NARDA
8200
HOLADAY
HI 1500
SIMPSON
380M
Place the oven tray into the oven cavity.
Place the load of 275
+ 15ml of water
initially
at
20 f5
"C in the center 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.
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 the cool water.
Move the probe slowly
(not faster that 2.5cm/sec.)
along the gap.
The microwave
radiation
emission
should
be meas-
ured at any point of 5cm or more-from
the external
surface of the oven.
(RDEllOBU)
26
Advertisement
