Sharp R-9X55 User Manual

R-9X55
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
4. Operate the microwave oven at HIGH for the temperature of the water rises by a value L T of
(10 f 2)C.
5. Stir the water to equalize temperature throughout the vessel.
6. Measure the final water temperature.
(Example: The finai temperature T2 = 21 C!
7. Calculate the microwave power output P in watts from above formdiia.
-___ ----__ -__-- .---__-
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lnitia! temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._....... .._ 7-7 = 1 4 ~‘3
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Temperature after !,47+2;= 19 sec. . . . . . . . . . . . . . . . . . . . . . . . . . . . ..*......._... . . . . .._..... . . . . . . ..I-2 = 2’! c
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Temperature difference Cc/d-Warm . . . . . . . . . . . . . . . . . . . . . . . . .._........ . .
. . .._.. _. . . . . . . 5’: = IO C
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Measured output power
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The equation is “P= 90 Y 17’
. . s.,....... . . . . . . . ..~.......................
p= Fjc y ; 0 ;2 = gzs lJ/atts
JUDGMENT:
The measured output power should be at teas: .I 5 5 O;3 a? the rated output
power.
CAUTION:
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MICROWAVE OUTPUT POWER (2 Liter water load)
The ‘following test procedure shsu!d be carried out with the microwave oven in a fuily assemblea
condition (with outer case fitted).
Microwave output power from the magnetron can be measured by way of subsiitutron. i.e. it can be
measured by using a water load how much it can be absorbed by the water load. To measure the
microwave output power in the microwave oven, the relation of calorie and watt is used.
When P(W) heating works for tjsecond), approximately P x ti4.2 calorie is generated. On the other
hand, if the temperature of the water with V(ml) rises AT (“C} during this microwave heating period, the
calorie of the water is V x AT.
The formulae is as follows:
I
Pxt/4.2=VxAT
P (W) = 4.2 x V xAT i t
I
Our condition for the water load is as follows:
Room temperature . . . . . . . . . . around 20°C
Power supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 240 volts.
Water load . . . . . . . 2000
ml
Initial temperature
. . . . . . . 10 I 1 “C
P = 80 x IT
Heating time . . . . 1 min. 45 sec.
Measuring method:
A) The two water containers must be prepared.
The water container must be one (I > litre beaker made of Pyrex glass and its diameter approxl-
mately 12cm.
B) Put the one (1) litre water into each beaker (Each beaker has one litre water). The initial tempera-
ture of the water should be 1 Orl C.
C) Mark TI on the one beaker and mark T2 on the other one. And stir the water and measure the
temperature of water the thermometer and note them. The graduation of the thermometer must be
scaled by 0.1 ‘C at minimum and an accurate mercury thermometer is recommended.
D) Place the two (2) beakers as touching each other in the centre of the oven cavity.
15

Sharp R-9X55 Specifications

General

Brand	Sharp
Model	R-9X55
Category	Microwave Oven
Language	English