Measurement Of Microwave Output - Panasonic Microwave Ovens with Inverters Technical Manual

Measurement of microwave output

The output power of the magnetron can be determined by performing IEC
(International Electro-technical Commission) standard test procedures. However,
due to the complexity of IEC test procedures, it is recommended to test the
magnetron using the simple method outlined below.
Equipment necessary:
• 1liter beaker.
• Glass thermometer.
• Stopwatch.
NOTE:
Check the line voltage under load. Low voltage will lower the magnetron output.
Take the temperature readings and heating time as accurately as possible.
1 minute 1 liter test
Fill the beaker with exactly one liter of tap water. Stir the water using the
thermometer and record the water's temperature.
1. Place the beaker on the center of glass tray.
2. Set the oven for High power and heat it for exactly one minute.
3. Stir the water again and read the temperature of the water.
The normal temperature rise at High power level for each model should be as
follow:
• 1200W output (IEC705-88) models should have a minimum temperature
rise of 18.5°F.
• 1300W output (IEC705-88) models should have a minimum temperature
rise of 19.8°F.
Figure 15
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