2.SPECIFICATIONS
Microwave output | 1,800W to 180W | ||
Frequency | 2,450MHz |
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Power supply | 208V, 60Hz | ||
Rated current | 13 Amp. |
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Safety Device |
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Thermal protector(Magnetron) 150°C(270°F)Open | |||
(Thermostat) |
| 80°C(144°F)Close | |
Thermistor (Magnetron) | 200°C(360°F) Open | ||
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| 108°C(194°F)Close | |
Thermistor(Duct) | 120°C(216°F) Open | ||
Fuse (Cartridge Type) | 250V 10A | ||
Micro switch, Relay |
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| Interlock Switch | |
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| Interlock monitor Switch | |
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| Door sensing Switch and | |
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| Relay | |
Max. input time | Electronic Digital, up to | ||
Manual | 10min./Memory 30min. | ||
Overall Dimensions | 422(W)x540(D)x335(H) mm | ||
Oven cavity size | 330(W)x330(D)x230(H) mm | ||
Effective Capacity of Oven Cavity | 19.1liters | ||
Net weight | 32Kg |
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3. POWER OUTPUT MEASUREMENT
NOTE: The power output specification, 1800W on this model is measured with IEC measurement. The power output is measured with two(2) liters water is equiva- lent to 1800W in measurement with IEC, when mea- sured with the following power output.
(1)1. Fill two beakers, one liter of tap water respec- tively
2.Use an accurate thermometer and measure each water temperature respectively.
(2)Place beakers side by side in center of the ceramic tray.
(3)Close the door,set the “TIME” for two minutes. Touch the “START” key and heat the water for exactly two minutes.
(4)Take the beakers out, immediately stir the water and measure the water temperatures respectively.
(5)Calculate the temperature rise of water in each beaker. Then calculate the average value of the two temperature rises.( Ģt)
(6)The teperature rise shall be in the following range; Average Temp. Rise
Minimum 23.1° C
Maximum 28.3° C
Power output is affected by the line voltage under load.
(7)For correct Power output measurement, the line voltage under load must be 208±2Volts.
4.PRECATIONS AND REPAIR SERVICE TIPS
PRELIMINARY
A. SINCE NEARLY 4,000 VOLTS EXISTS IN SOME CIRCUITS OF THIS MICROWAVE OVEN, RE- PAIRS SHOULD BE CARRIED OUT WITH GREAT CARE.
B. TO AVOID POSSIBLE EXPOSURE TO MICRO- WAVE ENERGY LEAKAGE, THE FOLLOWING PRECATIONS MUST BE TAKEN BEFORE SER- VICING.
(1)Before the power is applied.
(a)Open and close door several times to make sure the interlock switch, door sensing switch and interlock monitor switch operate properly. (Listen for the clicking sound from switches.) Make sure the interlock monitor switch is closed after the interlock switch and door sens- ing are open when the door is opened.
(See pages 1 and 6)
(b)Make sure the perforated screen and the choke dielectric of the door are correctly mounted.
(2)After the power is applied.
(a)Open and close the door to see if the interlock mechanism operates properly.
(b)Check microwave energy leakage with a leak- age detector and confirm the energy leakage is below 5mW/cm2
(3)Do not operate the unit until it is completely repaired of any of the following conditions.
(a)Door is not closed firmly against the cavity front.
(b)The hinge is broken.
(c)The choke dielectric or the door seal is dam- aged.
(d)The door is bent or warped, or there is any other visible damage to the oven that may cause microwave energy leakage.
Note: Always keep the seal clean.
(e)Make sure that there are no defective parts in the interlock mechanism.
(f)Make sure that there are no defective parts in the microwave generating and transmission assembly. (especially wave guide).
(4)The following items should be checked after the unit is repaired.
(a)The interlock monitor switch is connected cor- rectly and firmly.
(b)The magnetron gasket on the magnetron is properly positioned.
(c)Waveguide and oven cavity are intact. (No leakage of microwave energy).
(d)The door can be properly closed and the safety switches work properly.
(e)The oven must be stopped when the door is opened or the time is up.
The oven must not be operated with any of the above components removed or bypassed.
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