Panasonic NN-CT867MBPQ Service Manual page 16

NN-CT867MBPQ NN-CT857WBPQ
8.6. One touch Auto sensor cooking
Auto sensor cook is a revolutionary way to cook by microwave
without setting a power level or selecting a time. All that is nec-
essary is to select an auto sensor program before starting to
cook.
Understanding Auto sensor cooking
As food cooks, a certain amount of steam is produced. If the
food is covered, this steam builds up and eventually escapes
from the container. In auto sensor cooking, a carefully designed
instrument, called the humidity sensor element, senses the
escape of steam. then, based upon the auto sensor program
selected, the unit will automatically determine the correct power
level and the proper length of time it will take to cook the food.
NOTE: Auto sensor cooking is successful with the foods
and recipes found in the auto sensor cooking guide.
Because of the vast differences in food composition, items
not mentioned in the cooking guide should be prepared in
the microwave oven using the power select and time fea-
tures. Please consult variable power microwave cook book
for procedures.
Explanation of the auto sensor cooking process
1. The shaded columns in figure 1 indicate when the humid-
ity sensor heater is on.
2. During the 30 second period there is no microwave activ-
ity. When calculating the T2 time by using the formula
below, make sure this 30 seconds is subtracted from the
T0 time.
3. T1 time T0 time - 30 seconds
4. T2 time when the steam escapes from the cooking con-
tainer placed in the oven, the humidity sensor detects it
and the microprocessor calculates the balance of cooking
time. This T2 time is then shown in the display and begins
counting down.
Balance of cooking (T2 time)
The balance of cooking time which is called T2 time, can be
calculated by the following formula.
T2 time (in sec.) = T1 time x K factor
NOTE: Remember, the T1 time starts after the start pad is
tapped. The coefficient K is programmed into the micro-
processor memory and they are listed in the following
tables along with the P1 and P2 power.
NOTE: When "More" or "Less" pad is selected, the K factor
varies resulting in T2 time to be increased or decreased.
Calculating the T2 time
Example 1: If the t1 time is measured to be 2 minutes and 40
seconds, and the auto sensor program selected is sensor
reheat. Fish (Program 4)
T2 = T1 x K
= 2 min. and 40 sec. X. 0.3
=48 sec.
Category P1 POWER
1. Chilled meal HIGH
2. Frozen meal MED
Auto sensor cooking
16
P2 POWER K FACTOR
STANDARD
HIGH 1.6
HIGH 0.9
Figure 1