Sharp KS-R19S Service Manual page 14

b. When the lid is opened immediately after the cooking switch is turned OFF, no water should remain in the
inner pot or only a small amount of water (approximately 20 cc) is to remain in the recess around the outer
periphery of the bottom face of the inner pot.
c. Turn ON the power supply and ensure that the time required for the cooking switch to be turned OFF is
in the values as given in the table below.
Note : As this test is nothing but a simplified procedure, it should be noted that operating time varies depending
on different conditions such as difference between water temperature and ambient temperature, variations
in the quantity of water, etc.
Where any delicate non-conformance such as the operating time being slightly higher than that shown
in tables is observed as a result of the test, it is recommended to conduct practical rice-cooking test.
Practical Rice-Cooking Test
1. Testing conditions
a. Power voltage 220V.
b. Cooking 3 cups of rice. (Minimum)
c. Ambient temperature to be 20
d. Water to be maintained at standard level on the level gauge.
2. Judgement criteria
a. Individual lamp and switch to be turned as follows.
Cook indicator lamp goes ON.
Cooking switch OFF (after 20 to 30 minutes).
Warm indicator lamp goes ON.
b. Check the rice layer on the pot bottom for the overdone degree.
Light overdone layer-Normal.
Heavy overdone layer-Replace thermostat ass'y.
3. Measurement of Warm-Keeping Temperature
At the empty state of inner pot, insert a bar-type thermometer, 100
inner lid and lid, and put the cooking switch to "COOK" position. After the cooker is energized for about
2 minutes manually turn the cooking switch only to "WARM" position to put the rice in warm-keeping state
for about an hour. In this case, the reading of warm-keeping temperature on the bar-type thermometer, if within
the following temperature range, will be acceptable.
o
100 C Bar-type Thermometer
Model
KS-R19S/ST
10 minutes (approx.)
KS-R23S/ST
o
o
C to 30 C.
Inner pot
Fig. 20
Time
o
C in full-scale into the inner pot, set the
A jig made from fragment of
packing case
14