MEASUREMENT AND TEST
2. MICROWAVE RADIATION TEST
PROCEDURE
1. Prepare M icrowave Energy Survey M eter,
600cc glass beaker, and glass therm om eter
100° C (212° F ).
2. Pour 275cc ± 15cc of tap water initially at 20 ± 5 ° C
(68 ± 9° F) in the 600 cc glass beaker with an inside
diam eter of approx. 95m m (3.5 in.).
3. Place it at the center of the tray and set it in a cavity.
4. Close the door and operate the oven.
5. M easure the leakage by using M icrowave Energy
Survey M eter with dual ranges, set to 2450M Hz.
1) M easured radiation leakage m ust not exceed the
value prescribed below. Leakage for a fully assem bled
oven with door norm ally closed m ust be less than 4m W /cm
2
.
2) W hen m easuring the leakage, always use the 5cm (2 in.) space cone with probe. Hold the probe perpendicular to the
cabinet and door. Place the space cone of the probe on the door, cabinet, door seem , door viewing screen, the exhaust
air vents and the suction air vents.
3) M easuring should be in a counter-clockwise direction at a rate of 1 in./sec. If the leakage of the cabinet door seem is
unknown, m ove the probe m ore slowly.
4) W hen m easuring near a corner of the door, keep the probe perpendicular to the areas m aking sure the probe end at
the base of the cone does not get closer than 2 in. from any m etal. If it does not, erroneous reading m ay result.
CAUTION
1. M ake sure to check the m icrowave leakage before and after repair of adjustm ent.
2. Always start m easuring of an unknown field to assure safety for operating personnel from m icrowave energy.
3. Do not place your hands into any suspected m icrowave radiation field unless the safe density level is known.
4. Care should be taken not to place the eyes in direct line with the source of m icrowave energy.
5. Slowly approach the unit under test until the radiom eter reads an appreciable m icrowave leakage from the unit
under the test.