R-3A53
R-3A53B
TEST PROCEDURES (CONT’D)
PROCEDURE
LETTER
COMPONENT TEST
(Tl OC)
(T2 OC)
(T2 OCI
Heat up for 2min. 20 sec.
MICROWAVE OUTPUT POWER (IEC-705-1988)
(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 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 formular is as follows;
Pxt/4.187=VxAT
P(W)=4.187xVxAT/t
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 . . . . . . . . . . . . . . . . 60 sec.
P=70xAT
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 (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 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.
11
To Next Page
Loading...
Need help?
General
