20
MEASUREMENT AND TEST
1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT
Microwave output power can be checked by indirectly mmeasuring the temperature rise of a certain amount of water
exposed to the microwave as directed below.
PROCEDURE
1. Microwave power output measurement is made with the microwave oven supplied at rated voltage and operated at its
maximum microwave power setting with a load of 100 ± 5cc of potable water.
2. The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an
outside diameter of approximately 190 mm.
3. The oven and the empty vessel are at ambient temperature prior to the start of the test. The initial temperature of the
water is 10 ± 2°C (50 ± 3.6°F). If is measured immediately before the water is added to the vessel. After addition of the
water to the vessel, the load is immediately placed on the center of the shelf, which is in the lowest normal position.
4. Microwave power is switched on.
5. Heating time should be exactly A seconds.
(Refer to table as following)
Heating time is measured while the microwave generator is
operating at full power. The filament heat-up time for
magnetron is not included.
6. The initial and final temperature of water is selected so that the
maximum difference between the ambient and final water
temperature is 5K.
7. The microwave power output P in watts is calculated from the
following formula:
•
∆
T is difference between initial and ending temperature.
• t is the heating time.
The power measured be B (Refer to SPECIFICATIONS) W ± 10.0 %.
✻
Heating time for power output:
NOTE
Microwave emission test should be performed after adjusting interlock mechanism. If the microwave emission
exceed 4mW/cm
2
, readjust interlock mechanism.
P = 4187 X
∆
T/t
70
600
64
650
60
700
56
750
52
800
49
850
47
900
44
950
42
1000
40
1050
38
1100
A (second)
B (W)
