Checking For Microwave Energy Leakage - KitchenAid KHMS105E Service Manual

CHECKING FOR MICROWAVE ENERGY LEAKAGE

CAUTION
On every service call, checks for microwave
energy emission must be made according to
the following manner.
1. Remove the cooking rack from the oven
cavity, if the microwave oven is so
equipped.
2. Place a 275 ML (9. oz.) glass of water in
the center of the oven bottom.
3. Select "HlGH" cook power, turn the mi-
crowave oven on, and test for R.F. Ieakage
using the following pattern:
a) Check around the cabinet at the front.
b) Check around the door.
c) Check across the console panel.
d) Check horizontally across the door
e) Check vertically across the door.
f) Check diagonally across the door.
g) Check across the air vents.
h) Check across the rear air vent.
NOTE: The scan speed is one-inch-per-sec-
ond.
EQUIPMENT
• Electromagnetic energy leakage monitor
(NARDA 8100B, HOLADAY H1501).
• 6100 cc glass beaker.
• Glass thermometer 100˚C or 212˚F.
When checking for R.F. Ieakage, use an ap-
proved R.F. measuring device to assure less
2
than 4 mw/cm emission at 5 cm distance with
a maximum scan rate of 2.5 cm/second, in
compliance with U.S. Government Department
of Health, Education and Welfare 21 CFR1030,
performance Standard for Microwave Ovens.
A properly operating door and seal assembly
will normally register small emissions, but they
must be no greater than 4 mw/cm
measurement uncertainty.
NOTE: Enter leakage readings in the space
BEFORE and AFTER on the service docu-
ment.
All microwave ovens exceeding the emission
level of 4 mw/cm
Service for microwave ovens immediately and
the owner should be told not to use the micro-
wave oven until it has been repaired com-
pletely.
If a microwave oven is found to operate with
the door open, report to Dept. of Service, the
manufacturer, and CDRH* immediately. Also
tell the owner not to use the oven.
The interlock monitor switch acts as the final
safety switch protecting the customer from
microwave radiation. If the interlock monitor
switch operates and opens the line fuse, the
interlock switches have failed, and you must
replace all of them (primary and secondary
interlock switches, and the monitor switch),
because their contacts may be melted and
welded together.
All repairs must be performed so that micro-
wave energy emissions are minimal.
* CDRH: Center for Device and Radiological health, food, and
drug administration.
3-16
2 to allow for
2 must be reported to Dept. of