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R -7A54
'D
TEST
PROCEDURES
(CONT'D)
PROCEDURE
LETTER
COMPONENT
TEST
(Tl OC)
(T2 OC)
(T2 OC)
Heat up for Imin. 52 sec.
MICROWAVE
OUTPUT
POWER
(IEC-7054988)
(RD82A02U)
The following
test procedure
should
be carried
out with
the microwave
oven
in a fully
assembled
condition
(outer
case fitted).
Microwave
output
power
from
the magnetron
can be measured
by
way
of IEC 705,
i.e. it can be measured
by using
water
load how
much
it can be
absorbed
by the
water
load.
To measure
the microwave
output
power
in the microwave
oven,
the relation
of cai-
orie and watt
is used.
When
P(W)
heating
works
for t(second),
approximately
P x t/4.1 87 calorie
is generated.
On the other
hand,
if the temperature
of the water
with
V(ml)
rises
AT
("C)
during
this microwave
heating
period,
the calorie
of the water
is V x
AT.
The formular
is as follows;
Pxt/4.187=VxAT
P(W)=4.187xVxAT/t
Our condition
for the water
load
is as foliows:
Room
temperature
. . . . . . . . . . . . . . . . . . . . . around
20°C
Power
supply
Voltage
. . . . . . . . . . . . . . . . . . . . . 240 volts
Water
load . . . . . . . . 1000
g
initial
temperature
. . . . . . . IO &2"C
Heating
time
. . . . . . . . . . . . . . . . 49 sec.
P = 85 x AT
Measuring
condition:
I.
Container
The water
container
must
be a cylindrical
borosilicate
glass vessel
having
a maximum
material
thickness
of 3 mm and an outside
diameter
of approximately
190 mm.
2. Temperature
of the oven
and vessel
The oven
and the empty
vessel
are at ambient
temperature
prior
to the start of the fest.
3. Temperature
of the water
The initial
temperature
of the water
is (I 0 + 2)"C.
4. Select
the initial
and final
water
temperature
so that the maximum
difference
between
the final
water
temperature
and the ambient
temperature
is 5°C.
5. Select
stirring
devices
and measuring
instruments
in order
to minimize
addition
or removal
of
heat.
6. The
graduation
of the
thermometer
must
be scaled
by 0.1 "C at minimum
and
an accurate
thermometer.
7. The water
load must
be (1000
&- 5) g.
8. "t"
is measured
while
the microwave
generator
is operating
at full
power.
Magnetron
filament
heat-up
time
is not included.
NOTE:
The operation
time
of the microwave
oven
is "t + 2" sec.
2 sec. is magnetron
filament
heat-up
time.
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