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Theory of Operation
SENSOR COOKING CONDITION
Using the SENSOR function, food is cooked without
¿ guring time, power level or quantity. When the oven
senses enough steam from the food, it relays the
information to its microprocessor which will calculate
the remaining cooking time and power level needed
for best results. When the food is cooked, water
vapor is developed, the sensor "senses" the vapor
and its resistance increase gradually. When the
resistance reaches the value set according to the menu,
supplementary cooking is started.
The time of supplementary cooking is determined by
experiment with each food category and inputted into the
LSI. An example of how sensor works: (Potatoes)
1.
Potatoes at room temperature. Vapor is emitted very
slowly.
2.
Heat Potatoes. Moisture and humidity is emitted very
rapidly. You can smell the aroma as it cooks.
AH SENSOR
3.
Sensor detects moisture and humidity and calculates
cooking time and variable power.
Drawer Microwave
COOKING SEQUENCE
1.
Touch one of the SENSOR pads.
NOTE: The oven should not be operated on sensor
immediately after plugging in the unit. Wait two minutes
before cooking on SENSOR.
2.
The coil of shut-off relay (RY-3-8) is energized, but
the power transformer is not turned on.
3.
After about 3-86 seconds, the cook relay (RY-2)
is energized. The power transformer is turned
on, microwave energy is produced and ¿ rst stage
is started. The 3-86 seconds is the cooling time
required to remove any vapor from the oven cavity
and sensor.
NOTE: During this ¿ rst stage, do not open the drawer or
touch STOP/CLEAR pad.
4.
4. When the sensor detects the vapor emitted from
the food, the display switches over to the remaining
cooking time and the timer counts down to zero. At
this time, the drawer may be opened to stir, turn or
season food.
5.
When the timer reaches zero, an audible signal
sounds. The shut-off relay and cook relay are de-
energized and the power transformer, oven lamp,
etc. are turned off.
6.
6. Opening the drawer or touching the STOP/CLEAR
pad, the time of the day will reappear on the display
and the oven will revert to an OFF condition. When
the timer reaches zero, an audible signal sounds.
3-8
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