Compass says please cal after about 5 seconds of using it

To fix this, hold down the A button for 4 seconds. this allows you to recalibrate the home position of the second hand. My secondo hand was posting exactly 90 degrees west in compass mode, and this home position recalibration fixed it 100 percent.

This type of movement is typical of the indication used by watch makers to warn that the battery is running low and should be replaced soon.

Hi john30x,

You have to calibrate the compass.
1. Press the upper right button (switching to compass mode)
2. Press and hold upper left button. The "CALL" will appear on the display. You are in compass calibrating mode.
3. Rotate the watch horizontally (around his vertical axis) slowly, so to be sure that he point the North at least 2 times.
4. Now press the upper left button again to input the declination (this is the angle between the magnetic and real pole). It is different for the area around the world, that you want to explore.
5. Switch between the positions of the cipher by pressing bottom left.
6. Change the cipher by pressing bottom right.
7. Switch between the active position by pressing bottom left. Now you have to enter East or West declination
8. If you are ready press the upper left. "END" of calibration will appear on the screen

Once you calibrate and set the declination you can use the the compass by pressing upper right button. As the compass is very sensitive It is good idea to calibrate it on a field, far away of metal objects and electromagnetic fields (cables, ect.). You need to calibrate the compass each time you want to use it by different surrounding.

Remember the compass function of your watch need much more energy than the watch itself. Don`t worry to change the battery when dead. The water resistance remains good even after. Very robust and accurate device. I hope that should help.

Click on my profile (escapement), then click on Tips and Tricks. There you will find link to all ARMITRON watch manuals.Rate me, please

http://world.casio.com/wat/download/en/manual/

Use the four numbers on the back of your watch and you will have a PDF version of your instruction manual.

Hope this tip helps

R/

David

Mine does the same!

Above link no longer valid.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.

Try holding the bottom right button until is says CAL then press the top right button to start the arrows turning around the outside edge.
Hold the watch level and turn around in clockwise circles about 4 times until it shows the direction again.

if your hands aren't straight when you use the compass try this to sync the hands.

1. Press and hold the middle button to enter T-Touch mode.
2. Press the centre area on the face twice to display 24hr/12hr
3. Press and hold the middle button to enter T-Touch mode untill screen says sync.The hands will face 1200.
4. Press either the upper (East) or lower (West) button to adjust the compass hands. They should both face 1200.
5. Press the middle button to get back to 'regular' compass mode. Note that your offset setting will still show in the digital area.

• Push the middle (T) button.
• Touch the screen in the center selecting the units mode (24 C m).
• Push the middle (T) button again for 5 seconds.
• "SYNCHro" will appear on the display.
• Use (+) button for min arm and (-) for hour arm.
• Bring the two hands pre-cisely to 12 o'clock.
• Press the middle (T) button to validate the setting.