LG LMVM2277ST Product Training Manual page 121

Microwave Power
Note:
The average temperature rise of the water in the two
beakers must be determined, because of possible uneven
power distribution within the oven cavity. This could affect
the ending temperatures of both beakers water. If the
water temperature in the 2 beakers differs, add the two
Celsius numbers and divide by 2 to get the average
ending temperature.
T-35
LMVM2277ST
121