Casio 1570 Benutzerhandbuch - Seite 5
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ALTIMETER FUNCTIONS
A built-in altimeter uses a pressure sensor to detect the current air pressure,
which is then used to estimate the current altitude in accordance with ISA
(International Standard Atmosphere) values for altitude and air pressure. If
you preset a reference altitude, the watch will also calculate the current
relative altitude based on your preset value. Altimeter functions also include
data storage memory and an altitude alarm.
Important!
• This watch estimates altitude based on air pressure. This means that
altitude readings for the same location may vary if air pressure changes.
• Sudden changes in the weather make it impossible to produce accurate
altitude readings.
• This watch employs a semiconductor pressure sensor, which is affected by
temperature changes. When taking altitude measurements, be sure to do
so while ensuring that the watch is not exposed to temperature changes.
• Do not use this watch while participating in sports where there are sudden
altitude changes. Also, do not use this watch for applications that demand
professional or industrial level precision. This watch should not be used
while engaging in the following activities: sky diving, hang gliding,
paragliding, gyrocopter riding, glider riding, etc.
Applications
When no reference altitude is preset:
• The watch produces approximate altitude readings.
When a reference altitude is preset:
• Before beginning the climb, set the reference altitude to 0 m at the foot of
the mountain. This makes it possible to determine the difference in altitude
between the reference point and your destination.
• To determine the height of a tall
building, set the reference altitude to
0 m on the ground floor. Note,
however, that if the building is
pressurized or air conditioned, you
may not be able to get a good reading.
• To determine the difference in altitude between your house and another
location, set the reference altitude to 0 m at your house, and then check the
reading when you arrive at the other location.
• When mountain climbing, you can
input the altitude from a marker as your
reference altitude, which will then let
you know your altitude as your climb
proceeds. The following conditions will
prevent you from obtaining accurate
readings:
When air pressure changes because of changes in the weather
Extreme temperature changes
When the watch itself is subjected to strong impact
About altitude measurements
There are two types of altitude measurements: those for displayed data
(Altimeter Mode measurement) and those for memory data (memory
measurements; See "Memory measurements").
Altimeter Mode measurement
This type of measurement is performed only when the watch is in the Altimeter
Mode. As soon as you enter the Altimeter Mode, measurements are taken
every five seconds for the first three minutes. After that, measurements are
taken every two minutes. The display unit for Altimeter Mode measurements is
5 m (20 feet), and the display range is 0 to 6000 m (0 to 19680 feet).
• The measured altitude may be a negative value in cases where there is a
reference altitude value set or because of certain atmospheric conditions.
Understanding the altimeter display
Use C to enter the Altimeter Mode. Note that once you enter the Altimeter
Mode, if you do not press any button for 10 or 11 hours, the watch
automatically returns to the Timekeeping Mode.
*
1
Mode indicator
Auto memory measurement
indicator
A
B
A L M
A LT I
S I G
RECALL
A-LIGHT
AUTO
A L
MANUAL
C
D
Remaining memory
400
(Altitude Graph)
(Unit: 10 m/20 ft)
Current altitude
(flashing)
*
2
A L M
A LT I
RECALL
S I G
A-LIGHT
AUTO
A L
MANUAL
m
˚C
P
Current altitude
Current
Current time
temperature
*
1 The
mark next to ALTI flashes while a measurement is being taken
every five seconds. It does not flash during the measurements taken
every two minutes.
*
2 The
mark next to AUTO flashes while a memory measurement is in
progress. The indicator stops flashing while no measurement is being
performed.
Memory measurements
Memory measurements are taken independently of Altimeter Mode
measurements and stored directly into memory (along with temperature
measurements) for later recall. There are two types of memory
measurements: "Auto Memory Measurements" and "Manual Memory
Measurements".
Auto Memory Measurements
With auto memory measurement, the watch continuously performs
measurements whenever the minutes in the Timekeeping Mode reach 00, 15,
30, or 45, until you switch auto measurements off. The watch continues to
take measurements regardless of whether or not you change modes, so you
can keep a running log of temperature and altitude changes automatically.
Manual Memory Measurements
You can use the manual procedure to take a reading anytime you want to
store your current altitude data into memory for later recall. Manual memory
measurements can be performed only while the watch is in the Altimeter
Mode.
About the memory...
Each memory item (auto or manual) stored by the watch consists of the
current altitude, plus the date, time, and temperature. Data is stored in the
same sequence that it is input.
Memory can hold a total of 50 sets of data, which is enough to store 12 hours
and 15 minutes of auto memory data (if you do not take any manual readings
during that time).
Important!
Further auto or manual memory measurements
become impossible whenever memory is full.
The message
FULL
on the display indicates
that memory is full. Always check the amount of
memory remaining before starting memory
measurements, and delete data if necessary.
Selecting Auto or Manual Memory Measurement
Use the following procedure to switch between auto or manual memory
measurement. Note that you cannot perform this operation while a preset auto
memory measurement is already in progress.
1. In the Altimeter Mode, hold down A until the display clears. After 4 or 5
seconds, either
OFF
or the current reference altitude value (if set) will start
to flash. The data flashes because it is selected .
2. Press C to change the selection in the following sequence.
(Reference Altitude Setting)
A
A L M
S I G
RECALL
A-LIGHT
A L
MANUAL
C
Press C.
Auto memory measurement
indicator
A L M
A LT I
S I G
RECALL
A-LIGHT
AUTO
A L
MANUAL
m
Press C.
(Altitude Alarm Setting)
3. Press C to select the Memory Measurement Setting screen (with either
the
mark next to AUTO or MANUAL flashing).
4. Press B or D to switch between auto memory measurement (AUTO
or manual memory measurement (MANUAL ).
5. After selecting the type of measurement you want, press A to return to
the Altimeter Mode.
A L M
A LT I
S I G
RECALL
A-LIGHT
AUTO
A L
MANUAL
B
A LT I
AUTO
m
D
Press C.
A L M
A LT I
S I G
RECALL
AUTO
A-LIGHT
AUTO
A L
MANUAL
(Memory Measurement Setting)
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