GE JVM1851 Owner's Manual page 22

About the sensor features.
POPCORN
1
EXPRESS COOK
Use only with prepackaged
microwave popcorn weighing
0.05-0.10kg (1.7 to 3.5 ounces.)
NOTE: Do not use the
metal shelf when using
the Popcorn feature.
22
Popcorn
How to Use the Popcorn Feature
Follow package instructions, using Time Cook
1
9
if the package is less than 0.05kg (1.7 ounces)
or larger than 0.10kg (3.5 ounces). Place the
package of popcorn in the center of the
microwave.
Press POPCORN once or twice. The oven starts
2
immediately. Press once for a regular size
(0.08-0.10kg [3.0 to 3.5 oz]) bag of popcorn.
Press twice for a snack size (0.05kg [1.5 to 1.75
oz]) bag of popcorn.
If you open the door while POPCORN is displayed,
an error message will appear. Close the door and
press START.
How to Adjust the Popcorn Program to Provide a
Shorter or Longer Cook Time
If you find that the brand of popcorn you use
underpops or overcooks consistently, you can
add or subtract 20–30 seconds to the automatic
popping time.
To add time:
After pressing POPCORN, press 9 within the first
30 seconds after the oven starts for an extra
20 seconds.
Press 9 again to add another 10 seconds (total
30 seconds additional time).
To subtract time:
After pressing POPCORN, press 1 within the first
30 seconds after the oven starts for 20 seconds less
cooking time.
Press 1 again to reduce cooking time another
10 seconds (total 30 seconds less time).