Specifications

Ver SG 9/200 20 Sharp Electronics Corporation
MICROWAVE MEASUREMENT PROCEDURE
A. Requirements
1) Microwave leakage limit (power density limit):
The power density of microwave radiation emitted by a microwave oven should
not exceed 1mW/cm
2
at any point 5cm or more from the external surface of the
oven, measured prior to the acquisition by a purchaser, and thereafter (through
the useful life of the oven), 5mW/cm
2
at any point 5cm or more from the
external surface of the oven.
2) Safety Interlock Switches, Primary interlock relay and door sensing switch
shall prevent microwave radiation emission in excess of the requirement as
above mentioned, secondary interlock switch shall prevent microwave radiation
emission in excess of 5mW/cm
2
at any point 5cm or more from the external
surface of the oven.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its
instruction booklet.
2) Place the oven tray in the oven cavity.
3) Place the load of 275 + or - 15 ml (9.8 oz) of tap water initially at 20 + or -
(68 degrees F) in the center of the oven cavity. The water container shall be a
low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3
1/2 in.) and made of an electrically nonconductive material such as glass or
plastic. The placing of this standard load in the oven is important not only to
protect the oven, but also to insure that any leakage is measured accurately.
4) Set the cooking control on Full Power Cooking Mode.
Important:
Survey instruments that comply with the requirement for instrumentation
as prescribed by the performance standard for microwave ovens, 21 CFR
1030. 10(c)(3)(i), must be used for testing