> 22 <
> 23 <
its accuracy. You must know the elevation (From a map
point or other reliable data) or the pressure (Calibrated to
the sea level) for your current location.
setting options; Short press the FUNCTION button to
change the value of current option, which blinks; The valid
pressure is in t
Setting Step: Short press the MODE button to scroll
setting options; Short press the FUNCTION button to
change the value of current option, which blinks; The valid
pressure is in the range of 300.0hPa to 1200.0hPa, which can
be set by user. If the pressure is set out of the range, it will be
changed to the valid value automatically by device, when
exiting setting state and saving the value with long press
the MODE button. In other words, if the pressure is set larger
than 1200.0hPa, it will be set to 1200.0hPa automatically;
and if the pressure is set lower than 300.0hPa, it will be set
to 300.0hPa automatically.
COMPASS MODE
In measurement state of the ALTI mode, short press
the MODE button to switch to COMPASS mode. It displays
as show in the below picture:
“COMPASS” is the indicator of the COMPASS
mode.
“180°” is the heading which device directs to. It re-
fers to north. In other words, north is 0°; east is 90°; south
is 180°; and west is 270°.
The black dot on the LCD outline directs at the
north.
The valid heading is in the range of 0° to 359°, which
can be displayed.
Setting Declination: The device gets the heading
by geomagnetic field. And there’s an error between
geomagnetic north and earth north, so it should calibrate
this error in headings, to get the earth north. Declination
is the error between these two directions, and it’s different
from place to place. Fortunately, it can be obtained from
many ways, such as hiking topographic maps, web pages
(National Geophysical Data Center’s site www.ngdc.noaa.
gov/cgi-bin/seg/gmag/fldsnth1.pl), and other geographic
documents. An addendum to the document gives a table,
which lists the declinations of a part of the main cities or
areas in china. Declination is defined as “East” if magnetic
North falls to the east of true North; and “West” if magnetic
North falls to the West of true North. A positive declination
is “East”, and a negative declination is “West”.
In COMPASS mode, long press the MODE button to
enter setting declination state. It displays as show in the
below picture.
