Microwave Leakage Test - LG LMV2053ST Service Manual

MICROWAVE LEAKAGE TEST

CAUTIONS
• Be sure to check microwave leakage prior to
servicing the oven if the oven is operative prior to
servicing.
• The service personnel should inform the
manufacturer, importer or assembler of any certified
oven unit found to have a microwave emission level
in excess of 5 mW/cm
found to have excessive emission levels at no cost to
the owner. The service personnel should ascertain the
cause of the excessive leakage and instruct the owner
not to use the unit until the oven has been brought into
compliance.
• If the oven operates with the door open, the service
personnel should;
- Tell the user not to operate the oven
- Contact the manufacturer and CDRH (Center for
Devices and Radiological Health) immediately.
NOTE: Address on CDRH
Office of Compliance (HFZ-312)
Center for Devices and Radiological Health
1390 Piccard Drive Rockville, Maryland 20850
• The service personnel should check all surface and
vent openings for microwave emission testing.
• Check for microwave energy leakage after every
servicing. The power density of the microwave
radiation leakage emitted by the microwave oven
should not exceed 1mW/cm
measuring of an unknown field to assure safety for
operating personnel from radiation leakage.
NOTE: The standard is 5mW/cm
customer's home. 1mW/cm
manufacturer's own voluntary standard for units in
customer's home.
2 and should repair any unit
2 . Always start
2 while in the
2 stated here is
EQUIPMENT-
• TESTER (VOLTS-DC, AC, Ohmmeter)
• Microwave survey meter
- Holaday HI-1500
HI-1501
- Narda 8100
8200
• 600 cc non conductive material beaker (glass or
plastic), inside diameter: approx. 8.5 cm (3 1/2 in.)
• Glass thermometer: 100°C or 212°F (1 deg scale)
MEASURING MICROWAVE ENERGY
LEAKAGE
• Pour 275±15cc of water at 20±5°C(68±9°F) into a
beaker which is graduated to 600 cc, and place the
beaker on the oven.
• Set the energy leakage monitor to 2,450 MHz and
use it following the manufacturer's recommended
test procedure to assure correct result.
• When measuring the leakage, always use the 2-inch
(5cm) spacer supplied with the probe.
• Operate the oven at its maximum output.
• Measure the microwave radiation using an
electromagnetic radiation monitor by holding the
probe perpendicular to the surface being measured.
Move probe along shaded area.
Probe scanning speed
Less than 2.5 cm/sec. ( 1 in/sec)
7-2