Above link no longer valid. Here's the current one:
http://ftp.casio.co.jp/pub/world_manual/wat/en/qw3157.pdf
Also, the key was inputting the correct #, in this case 3157 - NOT the
100B - at the following page:
http://world.casio.com/wat/download/en/manual/
I had almost given up when I looked again at the back of my watch and
found the other number.
TO CALIBRATE THE COMPASS.
Press compass button then hold adjust button until indicator flashes at 12:00 position. with the indicator pointing away from you press the compass button again. the indicator will start to rotate clockwise. as it rotate keep the arrow pointing away from by turning the watch. when it gets the proper calibration it will say "done". Press adjust to exit.
You can get the manual here for free.
http://www.casio-europe.com/euro/drucken/watch/collection/sgw-100b-3vef/
Good luck and please rate
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