Current average
ascending speed or
descending speed
Current
altitude
Trip Timer Average ascending Total altitude
speed or displacement
descending speed {For Ascending (
)
or Descending (
) }
Height
Time
Spend
From
to
, (Ascending
) = d3+d4
Average ascending speed (AS
) t1
Total altitude displacement for ascending (d
) = d1+d2+d3
From
to
, (Descending ) = d3+d4
Average ascending speed (AS
) t2
Total altitude displacement for descending (d
) = d5+d6+d7
The Digital Compass
z
Press button D to enter into the Compass mode.
z
Keep the compass in horizontal level and pointing the direction
by “
”.
z
The compass will show the direction by 2 different ways.
(1). Precise direction pointed by “
” in degree and cardinal
readout, e.g. South East (SE) 135
°
.
(2). Precise direction of North (
), South (
),
East ( ) and West ( ) by the ring.
z
For Power Saving, the compass will automatically stop
measurement around 2 minutes with full direction dots on. To
start the measurement again, press button A.
e.g. Direction pointing by
- South East (SE) 135
°
East – 90
°
South - 180
°
North – 0 West – 270
°
These dots depict
symbolically a
compass needle
Example:
Determination of North
You may symbolize the icon
as the “TIP” of a needle, which
always points to the north, and the icon
as the “TAIL” of
the needle, which always points to the south. No matter what the
current compass’s orientation is, the NORTH and SOUTH can
easily be identified by
and
.
Compass Calibration and
Environmental Interference
z
It is important to know that all digital compasses work with
Earth’s magnetic field and are very sensitive to different
environments where the earth magnetic field is distorted, such
as interference of closing to heavy metal, home appliance,
computer and high power cable...etc.
z
To keep high accurate heading information, you must calibrate
the compass (1) when the magnetic distort message “Err” is
continuously displayed (2) when the numeric heading
information with an error of more than 10 degrees and (3)
when the unit is used for the first time in a vehicle so as to
separate the earth’s field from the interference.
How to Calibrate the Compass
z
Press button D to the Compass mode.
z
Press and hold button A to enter calibration mode
“CAL” and then press button C to start. The ring
will then display and turn.
z
Turn the unit clockwise for two circles on a level
surface where it is free from unnecessary metal
plate, home appliance, computer and high power
cable...etc. The circles do not need to be perfect
circles, but must be completed in the same
direction. It is also important that each circle takes
a minimum of 20 seconds but less than 1 minute
to complete.
z
Right after the calibration, press button C to
confirm
