Oregon Scientific RA126 - Manual (Page 9)

EN
8
• Press SET to navigate to Calibration mode option.
• Press and hold SET to begin calibration of the compass.
Rotate the watch counter clockwise at the same speed
as the moving segments around the circumference of
the display. The rotation will be finished once you have
performed 1 ¼ turns and the display will appear as shown
below when nearing the end of its calibration.
SET MODE
NOTE The compass should be calibrated:
• Before you use it for the first time.
• When the battery is replaced.
• Before you leave for an extended outdoor activity.
• Whenever it is exposed to strong magnetic sources,
extreme cold, or you suspect that other environmental
conditions have affected the compass readings.
• If you notice that the compass is not showing the
direction correctly.
TO SET THE TRUE NORTH CALIBRATION
When you do not know the declination angle, the true north
calibration function can be used to compensate for the
difference between magnetic and true north. All you need
to know is the direction of true north (this can be found from
landmarks in your immediate vicinity). Setting the true north
calibration makes the compass reading more accurate.
1. Press MODE to navigate to Set up mode.
2. Press SET to navigate to True north mode option.
3. Turn the compass to the direction of true north and
press ST / SP / +.
To toggle True north calibration ON / OFF:
• Press MODE to navigate to Set up mode.
• Press SET to navigate to True north mode option.
•
Press ST / SP / + to toggle true north mode to ON /
OFF
NOTE If the declination angle is turned ON, the True north
function will automatically turn itself OFF and vice-versa.
DECLINATION ANGLE
ABOUT DECLINATION
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/seg/geomag/jsp/Declination.jsp
1. Enter your zip code in the area provided
RA126 IM EN R5.indd 8 2007.7.27 12:21:52 PM