Procedure For Measuring Microwave Energy Leakage - Panasonic NN-T793SF APH Service Manual

PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE

Check for radiation leakage after every servicing. Should
the leakage be more than 2 mW/cm
Canada) inform PASC, PSC, or PCI immediately.
After repairing or replacing any radiation safety device,
keep a written record for future reference, as
required by D.H.H.S. and Health and Welfare Canada
regulation. This requirement must be strictly observed.
In addition, the leakage reading must be recorded on
the service repair ticket while in the customer's home.
NOTE: The U.S. Government standard is 5 mW/cm
the customer's home. 2mW/cm
voluntary standard. (1mW/cm
1. Equipment
*Electromagnatic radiation monitor
*Glass thermometer 212 O
*600cc glass beaker
2. 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
in Figure no faster than 1 inch/sec (2.5cm/sec).
(3) Leakage with the outer panel removed ...... less than 5mW/cm
(4) Leakage for a fully assembled oven with door normally closed
...... less than 2mW/cm
(5) Leakage for a fully assembled oven [Before the latch switch
(primary) is interrupted] while pulling the door ...... less than
2mW/cm 2 .
(A) Pour 275 15cc (9ozs s 1/2oz) of 20
beaker which is graduated to 600cc, and place in the center of the
oven.
(B) Set the radiation monitor to 2450MHz and use it following the
manufacturer's recommended test procedure to assure correct
results.
(C) When measuring the leakage, always use the 2 inch (5cm) spacer
supplied with the probe.
(D) 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 measur
ing around the magnetron.
Avoid contacting any high voltage parts.
(2) Measurements with a fully assembled oven.
After all components, including outer panel are fully assembled,
measure for radiation leakage around the door periphery, the
door viewing window, the exhaust opening and air inlet openings.
3. Record keeping and notification after measurement
(A) After any adjustment or repair to a microwave oven, a leakage read-
ing must be taken. Record this leakage reading on the repair ticket
even if it is zero.
A copy of this repair ticket and the microwave leakage reading should
be kept by repair facility.
WARNING
2
(1mW/cm
2
stated here is our own
2 for Canada)
F or 100 O C
2 (1mW/cm 2 for Canada).
O 5 O C (68 O 9 O F) water in a
WARNING
(B) Should the radiation leakage be more than 2 mW/cm
for Canada) after determining that all parts are in good
condition, functioning properly, and genuine replacement
parts as listed in this manual have been used, immediately
2
for
notify PASC, PSC or PCI.
4. At least once a year, have the radiation
monitor checked for calibration by its
manufacturer.
2
while in
AVOID CONTACTING ANY HIGH VOLTAGE PARTS.
2 .
- 19 -
WARNING
MOVE PROBE ALONG SHADED
AREA( )AROUND EXHAUST
OPENINGS(as shown)AND AROUND
AIR INLET OPENING
2
(1mW/cm
01-035