LG MH-1355M, Руководство по обслуживанию

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MEASUREMENT WITH A FULLY
ASSEMBLED OVEN
• After all components, including the outer case are
fully assembled, measure for microwave energy
leakage around the door viewing window, the
exhaust opening and air inlet openings.
• Microwave energy leakage must not exceed the
values prescribed below.
NOTES:
Leakage with the out case removed - less than 4
mW/cm
2 .sq.
Leakage for a fully assembled oven (“Before the latch
switch (primary) interrupted”) with the door in a
slightly opened position-less than 2 mW/cm
2 .sq.
NOTE WHEN MEASURING
• Do not exceed meter full scale deflection.
• The test probe must be removed no faster than 1
inch/sec (2.0 cm/sec) along the shaded, otherwise a
false reading may result.
• The test probe must be held with the grip portion of
the handle.
A false reading may result if the operator's hand is
between the handle and the probe.
• When testing near a corner of the door, keep the
probe perpendicular to the surface making sure the
probe horizontally along the oven surface, this may
possibly cause probe damage.
• When high leakage is suspected, do not move the
probe horizontally aiong the oven surface, this may
possibly cause damage.
RECORD KEEPING AND NOTIFICATION
AFTER MEASUREMENT
• After adjustment and repair of any microwave
energy interruption or microwave energy blocking
device, record the measured values for future
reference. Also enter the information on the service
invoice.
• Should the microwave energy leakage not be more
than 2 mW/cm 2 .sq. after determining that all parts
are in good condition, functioning properly and
genuine replacement parts which are listed in this
manual have been used.
• At least once a year, have the electromagnetic
energy leakage monitor checked for calibration by
its manufacturer.
DETERMINATION OF MEASUREMENT OF
MICROWAVE POWER OUTPUT
• Microwave power output measurement is made with
the microwave oven supplied at its rated voltage and
operated at its maximum microwave power setting
with a load of (1000 ± 5) cc potable water.
• 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.
• The oven and the empty vessel are at ambient
temperature prior to the start of the test.
• The initial temperature of the water is (10±2)°C. 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
Glass Tray which is in the lowest position and the
microwave power switched on.
• The time T for the temperature of the water to rise by
a value
∆
T of (10±2) K is measured, where T is the
time in seconds and
∆
T is the temperature rise. The
initial and final water temperatures are selected so
that the maximum difference between the final water
temperature and the ambient temperature is 5°K.
• The microwave power output P in watts is calculated
from the following formula:
4187 x (
∆
T) + 0.55 X (T
2
-T
0
)X M
T
• T
2
: Temperature after heating
• T
0
: Temperature of bowl
• M : Weight of bowl
is measured while the microwave generator is
operating at full power. Magnetron filament heat-up
time is not included.
• The water is stirred to equalize temperature
throughout the vessel, prior to measuring the final
water temperature.
• Stirring devices and measuring instruments are
selected in order to minimize addition or removal of
heat.
P =
WATER LOAD
GLASS TRAY
Fig. 44