Daewoo KOG-875T2S, Руководство по обслуживанию, Страница: 24 / 40

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1. Microwave Output Power
1-1. Standard Method
Microwave output power can be checked by indirectly
measuring the temperature rise of a certain amount of water
exposed to the microwave as directed below.
1) Microwave power output measurement is made with the
microwave oven supplied at rated voltage and operated
at its maximum microwave power setting with a load of
1,000 ± 5cc of potable water.
2) The water is contained in a cylindrical borosilicate glass
vessel having a maximum material thickness of 3 mm
and an outside diameter of approximately 190 mm.
3) The oven and the empty vessel are at ambient
temperature prior to the start of the test.
The initial temperature prior to the start of the test.
The initial temperature of the water is 10 ±2˚C (50 ±
3.6˚F)
It is measured immediately before the water is added to
the vessel. After addition of the water to the vessel, the
load is immediately placed on the center of the shelf
which is in the lowest normal position. (fig. 12).
4) Microwave power is switched on.
5) Heating time should be exactly 46 seconds.
Heating time is measured while the microwave genera-
tor is operating at full power.
6) The initial and final water temperatures are selected so
that the maximum difference between the ambient and
final water temperatures is 5K.
7) The microwave power output P in watts is calculated
from the following formula :
•
△ T is actual temperature rise.
•
t is the heating time.
The power measured should be 900W ±10%
2. Electrical Continuity Check of Interlock Switch
2-1. Procedure
1) Primary Interlock Switch
1) Disconnect two connector from Primary Interlock Switch.
2) Connect the ohm-meter leads between the terminals of
the primary interlock switch.
3) Read the value of resistance between the terminals of
the switch, when the door is opened, and when the
switch, when the door is opened, and when the door is
closed.
2) Secondary Interlock Switch
1) Disconnect two connector from secondary interlock
switch.
2) Connect the ohm-meter leads between the terminals of
the secondary interlock switch.
3) Read the value of resistance between the terminals of
the switch, when the door is opened, and when the oven
door is closed.
3) Interlock Monitor Switch
1) Disconnect the lead wire connecting the primary
interlock switch and interlock monitor switch from
primary interlock switch terminal.
2) Connect the ohm-metor leads between the lead wire
connector disconnected as item '1' and the power supply
natural plug pin.
3) Read the value of resistance between the lead wire
connector and the power supply natural plug pin, when
the oven door is opened, and when the oven door is
closed.
P=4187 △ T/t
CAUTION :
1. Water load should be measured exactly to 1 liter.
2. Input power voltage should be exactly volts as
specified.
3. Ambient temperature should be 20 2 (68
3.6 )
NOTE : Remove the power plug from the wall
receptacle before testing.
Water Load
Tray
MEASUREMENT
Fig. 12