Microwave Leakage Testing
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
©2005 Maytag Services 16022149 27
WARNING
!
Check for radiation leakage after servicing. Should
the leakage be more than 4 mW/cm
2
inform
Maytag immediately. After repairing or replacing
any radiation safety device, keep a written record
for future reference, as required by D.H.H.S. and
HEW regulations. This requirement must be strictly
observed. In addition, the leakage reading must be
recorded on the service repair ticket while in the
customer’s home.
Equipment
• Electromagnetic radiation monitor
• 600 cc glass beaker or plastic power bowl
Procedure for Measuring Radiation
Leakage
Note before measuring:
• Do not exceed meter full scale deflection. Leak
monitor should initially be set to the highest scale.
• To prevent false readings the test probe should be
held by the grip portion of the handle only.
• The scan speed is equal to one inch per antenna
revolution or one inch per second if antenna speed
is unknown.
• Areas to be checked are all door seal areas and any
venting parts.
• Leakage with the outer panel removed ...4mW/cm
2
or less.
• Leakage for fully assembled oven with door
normally closed ...4 mW/cm
2
or less.
• Leakage for a fully assembled oven (before the
latch switch (primary) is interrupted) while pulling
the door
... 4 mW/cm
2
or less.
1. Pour 275 cc ±15 cc (9 oz ±1/2 oz) of 20°C ± 5°C
(68°F ± 9°F) water in a beaker which is graduated
to 600 cc and place the beaker in the center of
oven.
2. Set the radiation monitor to 2450 MHz and use it
following the manufacturer’s recommended test
procedure to assure correct results.
3. While measuring the leakage, always use the two
inch (5 cm) spacer supplied with the probe.
4. Press the start pad or turn on the timer and with
the magnetron oscillating, measure the leakage by
holding the probe perpendicular to the surface
being measured.
Measurement with the Outer Panel
Removed
WARNING
!
Avoid contacting any high voltage components.
Whenever you replace the magnetron, measure for
radiation leakage before the outer panel is installed
and after all necessary components are replaced or
adjusted. Special care should be taken in measuring
around the magnetron.
Measurement with a Fully Assembled
Oven
After all components including the outer panel are fully
assembled, measure for radiation leakage around the
door periphery, the door viewing window, the exhaust
opening, and air inlet openings.
Record Keeping and Notification After
Measurement
1. After any adjustment or repair to a microwave
oven, a leakage reading must be taken. Record
this leakage reading on the repair ticket even if it is
zero.
2. A copy of the repair ticket and the microwave
leakage reading should be kept by the repair
facility.
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