Output Power Of Magnetron - Samsung ME21F707MJT Service Manual

4. Alignment and Adjustments

4-9 Output Power of Magnetron

PRECAUTION
MICROWAVE RADIATION
PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE
GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY.
The output power of the magnetron can be measured by performing a water temperature rise test.
Equipment needed :
Two 1-liter cylindrical borosilicate glass vessel (Outside diameter 190 mm)
One glass thermometer with mercury column
NOTE: Check line voltage under load. Low voltage will lower the magnetron output. Make all temperature and
time tests with accurate equipment.
1. Fill the one liter glass vessel with water.
2.
3. After moving the water into another glass vessel, place it in the center of the cooking tray. Set the oven to high
power and operate for 41 seconds exactly. (3 seconds included as a holding time of magnetron oscillation:)
4.
5.
6. The output power is obtained by the following formula;
Output Power =
7. Normal temperature rise for this model is 9°C to 11°C at 'HIGH'.
NOTE 1: Variations or errors in the test procedure will cause a variance in the temperature rise. Additional power
test should be made if temperature rise is marginal.
NOTE 2: Output power in watts is computed by multiplying the temperature rise (step 5) by a factor of 91 times the
of centigrade temperature.
41
45
42
1000
To
Mc
27
:
Heating Time
: Counting Time (sec)
: Water (cc)
: Room Temperature
: Cylindrical borosilicate glass weight