Radio Shack 22-1699 Owner's Manual page 16

When to Calibrate Your Unit
You must calibrate when :
1. It is being used for the first time.
2. It is being used in a different location.
Follow these steps to calibrate your detector.
1. Press CITY button for more than 2 seconds until the
voice says "Please turn your vehicle twice" with 3 beep
sound and "CAL...." Appears; then TURN and TWICE
flash alternately.
2. With the detector mounted in your vehicle, turn the
steering wheel all the way to the right or left and
continue driving in a circular motion. Then press
CITY.
3. After WAIT flashes 4 times, if the calibration is
complete, SUCCESS! Appears and the voice says
"Calibration complete."
After calibration, the heading appears.
Note: To achieve calibration, two circles must be made
and it must be performed on a levelled surface in less
than 2 minutes.
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