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PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE
Equipment
*Electromagnetic radiation monitor
*Glass thermometer 212°F or 100°F
*600cc glass beaker
Procedure for measuring radiation leakage
Note before measuring:
(1) Do not exceed meter full scale deflection. Leakage monitor
should initially be set to the highest scale.
(2) To prevent false readings the test probe should be held by
the grip portion of the handle only and moved along the shaded
area shown in Figure no faster than 1 inch/sec (2.5 cm/sec)
(3) Leakage with the outer panel removed less than 5mW/cm2
(4) Leakage for a fully assembled oven with door normally closed
less than 2mW/cm2.
(5) Leakage for a fully assembled oven [Before the latch switch (primary)
is interrupted] while pulling the door less than 2mW/cm2
1. Pour 275±15cc (9ozs± 1/2oz) of 20± 5°C(68± 9°F) water
in a beaker which is graduated to 600cc, and place the
beaker in the center of the oven.
2. Set the radiation monitor to 2450MHz and use it following
the manufactuers recommended test procedure to assure
correct results.
3. When measuring the leakage, always use the 2 inch (5cm)
spacer supplied with the probe.3.
4. Tap the start pad or set the timer and with the magnetron
oscillating, measure the leakage by holding the probe
perpendicular to the surface being measured.
(1) Measurement with the outer panel removed.
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.
(2) Measurements 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.