Sharp Carousel II R-3A54 Instrukcja serwisowa - Strona 12
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R-3E54
TEST PROCEDURES
(CONT'D)
PROCEDURE
LETTER
COMPONENT
TEST
CAUTION:
1 "C CORRESPONDS
TO 65 WATTS.
REPEAT MEASUREMENT
IF THE POWER IS INSUFFICIENT.
(Tl
"C)
(T2 W
(T2 OC,*
Heat
up
for 2min. 8 sec.
MICROWAVE
OUTPUT POWER (1 LITRE WATER LOAD)
(RD82A02J)
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 cal-
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 formula
is as follows;
Pxt/4.'l87=VxAT
P(W)=4.187xVxAT/t
I Our condition
for the water load is as follows:
Room temperature...
. . . . . . . . . . . . . . . . . . around 20°C
Power supply Voltage . . . . . . . . . . . . . Rated voltage
Water load . . . . . . . . 1000 g
Initial temperature
. . . . . . . 10+2"C
Heating time . . . . . . . . . . . . . . . . 52 sec.
P=80xAT
Measuring
condition:
1. 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 test.
3. Temperature
of the water
The initial temperature
of the water is (10 + 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 5K.
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 O.l"C
at minimum
and an accurate
thermometer.
7. The water load must be (1000
f. 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.
Measuring
method:
1. Measure the initial temperature
of the water before the water is added to the vessel.
(Example:
The initial temperature
Tl, = 11 "C)
2. Add the 1 litre water to the vessel.
3. Place the load on the centre of the shelf.
,
4. Operate the microwave
oven at HIGH for the temperature
of the water rises by a value
A
T of
10 + 2°C
5. Stir the water to equalize temperature
throughout
the vessel.
6. Measure the final water temperature.
(Example: The final temperature
T2 = 21 "C)
7. Calculate
the microwave
power output
P in watts from above formula.
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