Manual Oregon Scientific GP123 (page 8 of 95) (English, German, Dutch, French, Italian, Portuguese, Swedish, Spanish)

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NOTE If no key has been pressed in any 5 minute period,

the compass will time out and return to Altimeter mode

(default display).

COMPASS SENSOR CALIBRATION

NOTE

• Always take bearings in the open air, not inside

buildings, tents, caves, or other shelters.

• Compass readings should be performed away from

magnetic materials. Avoid large magnetic objects,

power lines, loudspeakers, electric motors etc.

IMPORTANT Compass calibration should be done on a ﬂat

horizontal surface. If there is no ﬂat stable surface available,

place it on the palm of your hand so that it is perpendicular to

your body. Using the other hand, turn the unit to calibrate.

To calibrate the compass sensor:

1. Press DISP/- repeatedly to navigate to compass mode.

2. Press and hold SET. Display will show CALI and smart

prompt .

3. Press SET to start calibration.

4. Rotate the unit clockwise at a constant speed. The

moving segments around the circumference of the

display act as a guide. The rotation will be ﬁnished once

you have performed 2 turns.

NOTE OK indicates calibration has been successfully

completed. Repeat steps 2-4 if FAIL is displayed.

DECLINATION ANGLE

Declination is the angle between where a compass needle

points (magnetic North Pole) and the true North Pole. The

declination angle can vary from 0-30 degrees East (E)

or West (W) and can be found on most maps or on the

Internet.

For declinations in the United States:

http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp

1. Enter your zip code in the text box.

2. Click “Get Location”.

3. Scroll down and click “Compute”.

For declinations in Canada:

http://geomag.nrcan.gc.ca/apps/mdcal-eng.php

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Oregon Scientific GP123 Manual

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