Question about Microwave Ovens
MICROWAVE HEATING POWER
The following test will provide a suitably accurate measurement of the output power of any microwave oven. Variations or errors in performing this test will produce uncertain results. If the line voltage (from the electrical outlet) is low, the magnetron output will be correspondingly low.
- Microwave safe container with 1000 mL (1 Liter) gradation.
- Fahrenheit or centigrade thermometer
Pour exactly 1000 mL (1 Liter) of cool tap water into the container. Using the thermometer, stir the water, then measure and record the temperature. For accurate results the water should be about 60 degrees F (20 degrees C).
Place the container on the center of the oven cooking shelf (do not leave the thermometer in the container and remove any metal racks), and heat the water (at full power) for 63 seconds. Use the second hand of a watch, not the oven timer.
After the heating time is completed, immediately remove the container, stir the water, re-measure and record the temperature of the heated water.
Subtract the starting water temperature (step 2) from the ending water temperature (step 3) to obtain the temperature rise.
To determine the output power in watts, multiply the total temperature rise by a factor of 38.75 if you're using a Fahrenheit thermometer or by 70 if you're using a centigrade thermometer.
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Posted on Dec 16, 2008
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Posted on Jan 02, 2017
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