Merrychef eikon
®
e2s service and repair manual
57
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5 Service information
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Microwave leakage test
Follow these instructions when measuring:
§
Make sure that the survey meter you are using has been calibrated and is suitable for measuring frequencies of 2,450
MHz.
§
Do not exceed meter full scale deflection. The leakage meter should initially be set to the highest scale, then adjusted
down as necessary to ensure that low readings are measured on the most sensitive range.
§
To prevent false readings, hold the probe on the grip provided and move at 2.5 cm/second.
§
Always hold the probe at right angles to the oven and point of measurement, ensuring the probe sensor is reading
50 mm from the test area.
§
The leakage should not exceed 5 mW/cm
²
.
6.
Select ‘Microwave power test’
from the service mode tests
(microwave power 100% for 63
seconds, convection fan at 10%).
7.
When the countdown has finished, remove the container from the cavity.
Immediately stir with a plastic implement and measure the water temperature.
8.
Calculate the temperature rise of the water (end temperature minus the start temperature).
The temperature rise should be 14.3°C (25.7°F) ±10% for the 1000W (1 magnetron) variant.
The temperature rise should be 28.5°C (51.4°F) ±10% for the 2000W (2 magnetrons) variant.
If the temperature rise is outside these limits repeat test and/or check the microwave circuit and components. A
low reading could be caused by the water container absorbing the energy, in which case an alternative container
should be used.
Replace the faulty HV component if required (see High voltage components in section 5.8).
Note: Opening the door during the test will stop the test. Reselect the test to run again.
1.
Add 275 ml of cold water into a 600 ml microwave safe container.
2.
Place the 600 ml container in the centre of the cavity and close the door.
4.
Set the leakage meter to the appropriate scale/range.
3.
Enter service mode on
the screen and select
‘Microwave leakage test’
from the appliance tests
(microwave power 100%
for 30 seconds,
convection fan at 10%).
5.
Move the survey meter
probe across all casework
joins and vent areas
including those marked in
yellow, shown opposite.
