Setting A Reference Altitude And Taking Relative Altitude Readings; Calibrating Altitude Readings - Casio 3452 Operation Manual

A Differential between reference altitude
and current altitude
B Current location altitude
C Altitude graph
Current reading
Setting a Reference Altitude
and Taking Relative Altitude
Readings
You can use the procedure below to display
the differential between a reference altitude
and another altitude. This makes it easy to
measure the altitude differential between two
points while climbing or trekking.
1.
Use the contour lines on your map to
determine the altitude differential between
your current location and your destination.
2.
Take an altitude reading of your current
location.
Checking the Current Altitude
l
3.
Hold down (A) for about one second to set
your current location's altitude as the
reference altitude.
This makes the altitude differential ±0 m
(±0 feet).
4.
While comparing the difference between
the altitude you found on the map and the
altitude differential displayed by the
watch, advance towards your destination.
Altitude differential indicator
Current location altitude
When the altitude differential you found
●
on the map is the same as that
displayed by the watch, it means you
are close to your destination.
Operation Guide 3452
Note
In place of step 3 of the above
●
procedure, you could perform the
steps below to make the altitude
differential ±0 m (±0 feet).
A Press (A).
200 m
B Rotate the rotary switch to move the
pointer to [DIFF RESET].
C Press the rotary switch.
This makes the altitude differential ±0
m (±0 feet).
[-----] will appear on the display when a
●
reading is outside the allowable
altitude measurement range (±3,000
m (±9,840 feet)), or if a measurement
error occurs.
Calibrating Altitude
Readings
To minimize the difference between locally
indicated and measured values, you should
update the reference altitude value before
setting off on and during treks or any other
activities where you take altitude readings.
You can find out the altitude at your current
location from signs, maps, on the Internet, etc.
While mountain climbing, it is highly
recommended that you check a map, local
altitude indications, or some other source for
your current location's altitude and regularly
calibrate watch readings with the latest
information.
Differences between actual altitude and
●
watch readings can be caused by the
factors below.
Changes in barometric pressure
ー
Changes in temperature caused by
ー
variations in barometric pressure and by
elevation
Though altitude readings can be taken
●
without calibration, doing so may produce
readings that are very different from
indications by altitude markers, etc.
1.
Press (A).
This displays the Altimeter Mode setting
screen.
2.
Rotate the rotary switch to move the
pointer to [CALIBRATION].
Rotary Switch
3.
Press the rotary switch.
4.
Rotate the rotary switch to move the
pointer to [MANUAL].
To return the altitude setting to its initial
●
factory default value, select [OFFSET
OFF].
5.
Press the rotary switch.
6.
Repeat the steps below to input the
altitude in your current location.
Rotate the rotary switch to change the
●
value or the sign where the underlining
is located. To specify a negative value,
display the minus (-) sign.
Press (D) to move the underlining to
●
another value.
To cancel the setting operation, perform
●
the steps below.
A Press (C).
B Rotate the rotary switch to select
whether or not you want to save the
current settings.
[YES]: Current settings saved
[NO]: Current settings not saved
C Press the rotary switch.
7.
Press the rotary switch to exit the setting
screen.
This completes the calibration
●
operation and returns to the Altimeter
Mode setting screen.
8.
Press (C) to exit the setting screen.
Rotary Switch
Rotary Switch
21