Sharp R-340DK Service Manual page 9

Note: The ON/OFF time ratio does not correspond with
the percentage of microwave power, because
approx. 2 seconds are needed for heating of the
magnetron filament.
SENSOR COOKING CONDITION
Using the Sensor cooking function (See sensor cooking
menus), the food is cooked without figuring 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 increases gradually. When the resistance
reaches the value set according to the menu, supplemen-
tary 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: (BAKED POTATOES)
1. Potatoes at room temperature. Vapor is emitted very
slowly.
2. Heated Potatoes. Moisture and humidity is emitted rapidly.
You can smell the aroma as it cooks.
AH SENSOR
3. Sensor detects moisture and humidity and calculates
cooking time and variable power.
Cooking Sequence.
1. Touch one of the One Touch Sensor pads (in case of one
touch sensor).
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-1) is energized, the turntable
motor, oven lamp and cooling fan motor are turned on,
but the power transformer is not turned on.
3. After about 16 seconds, the cook relay (RY-2) is
energized. The power transformer is turned on,
microwave energy is produced and first stage is started.
The 16 seconds is the cooling time required to remove
any vapor from the oven cavity and sensor.
NOTE: During this first stage, do not open the door or touch
STOP/CLEAR pad.
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 door 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. Opening the door or touching the STOP/CLEAR pad, the
time of day will reappear on the display and the oven will
revert to an OFF condition.
The followings are the sensor cooking menus.
Reheat
Popcorn
Baked potatoes
Vegetables
Ground beef of Meat
Boneless Chicken Breast, Bone-in Chicken Pieces and
Ground Poultry of Poultry
Fish / Seafood
Vegetables, Entrees, Main Dishes and Snacks of Frozen
food
White Rice and Brown Rice of Pasta Grains
Frozen breakfast food, Meal in cup, Hot dogs in buns,
Soup, Frozen sandwich, Stuffed Acorn Squash,
Ratatouille of More from Your Microwave
7
R -340DK
R-340DW