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To Select The Altitude Screen Format; To Select The Altitude Auto Reading Interval; To Take Altitude Readings; To Specify A Reference Altitude Value - Casio 3444 Operation Manual

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Table of Contents
Selecting the Altitude Screen Format
You can select either of two screen formats for the Altimeter Mode.
Screen 1
Altitude
Tendency Graph
Altitude
Current time
Altitude tendency graph contents are updated each time you take an altitude reading.
Graph units are 10 meters on the vertical axis, and the measurement reading interval (one second, fi ve
seconds, or two minutes) on the horizontal axis (page E-58).
To take readings of the difference between the altitude at your current location and the altitude at a
reference point, select Screen 2. See "Using an Altitude Differential Value" (page E-62) for more
information.
E-56
Selecting the Altitude Auto Reading Interval
You can select either of the following two altitude auto reading intervals.
0'05: Readings at one-second intervals for the fi rst three minutes, and then every fi ve seconds for
approximately the next hour
2'00: Readings at one-second intervals for the fi rst three minutes, and then every two minutes for
approximately the next 12 hours
Note
If you do not perform any button operation while in the Altimeter Mode, the watch will return to the
Timekeeping Mode automatically after 12 hours (altitude auto reading interval: 2'00) or after one
hour (altitude auto reading interval: 0'05).
If trek log operation is in progress with 0'05 selected as the altitude auto measurement method,
exiting the Altimeter Mode to another mode will automatically cause the auto reading interval to
change to 2'00.

To select the altitude auto reading interval

1. In the Altimeter Mode, hold down E for at least two seconds. SET
Hold will fl ash on the display and then ALTI will appear in the upper
display. Keep E depressed until ALTI appears.
The current altitude reading value will appear at this time.
2. Press D to display the current altitude auto reading interval setting.
This will cause INTERVAL to scroll across the top display. The
current altitude auto reading interval setting (0'05 or 2'00) will be
fl ashing in the center display.
3. Press A to toggle the altitude auto measurement interval setting
between 0'05 and 2'00.
4. Press E to exit the setting screen.
E-58

To take altitude readings

1. Make sure the watch is in the Timekeeping Mode or any one of the
Screen 1 Selected
Screen 1 Selected
sensor modes.
Altitude Tendency Graph
Altitude Tendency Graph
The sensor modes are: Digital Compass Mode, Barometer/
Thermometer Mode, and Altimeter Mode.
2. Press A to start auto altimeter readings.
The current altitude value is displayed in units of 1 meter (5 feet).
For information about the measurement interval, see page E-58.
Note
Altitude
Altitude
After you are fi nished, press D to return to the Timekeeping Mode and
stop auto altimeter readings.
Current time
Current time
The watch will return to the Timekeeping Mode automatically if you do
not perform any operation (page E-26).
The measurement range for altitude is –700 to 10,000 meters (–2,300
Screen 2 Selected
Screen 2 Selected
to 32,800 feet).
Relative altitude
Relative altitude
The displayed altitude value changes to - - - - if an altitude reading
falls outside the measurement range. An altitude value will reappear as
soon as the altitude reading is within the allowable range.
Normally, displayed altitude values are based on the watch's preset
conversion values. You also can specify a reference altitude value, if
you want. See "Using Reference Altitude Values" (page E-61).
Altitude
Altitude
You can change the unit for displayed altitude values to either meters
(m) or feet (ft). See "To specify temperature, barometric pressure, and
altitude display units" (page E-44).
Current time
Current time
E-60
Advanced Altimeter Mode Operations
Use the information in this section to obtain more accurate altimeter readings, especially while mountain
climbing or trekking.
Using an Altitude Differential Value
The Altimeter Mode screen has an altitude differential value that shows
Altitude differential
Altitude differential
the change in altitude from a reference point you specify. The altitude
differential value is updated each time the watch takes an altitude reading.
The range of the altitude differential value is –3,000 meters (–9,995
feet) to 3,000 meters (9,995 feet).
- - - - is displayed in place of the altitude differential value whenever
the measured value is outside the allowable range.
See "Using the Altitude Differential Value While Mountain Climbing or
Hiking" (page E-63) for some real-life examples of how to use this
feature.

To specify the altitude differential start point

1. In the Altimeter Mode, select Screen 2 as the Altimeter Mode display
Altitude differential
Altitude differential
(page E-57).
2. Press E.
The watch will take an altitude reading and register the result as
the altitude differential value start point. The altitude differential
value will be reset to zero at this time.
E-62
Operation Guide 3444
Screen 2
Relative altitude
Altitude
Current time

To select the altitude screen format

1. In the Altimeter Mode, hold down E for at least two seconds.
SET Hold will fl ash on the display and then ALTI will appear in the upper display. Keep E
depressed until ALTI appears.
The current altitude value will appear at this time.
2. Press D twice.
DISP will appear, and then the current screen setting will appear in the upper display.
3. Use A to toggle the setting between the two screens.
Screen 1
4. Press E to exit the setting screen.
Taking Altitude Readings
Use the procedure below to take basic altitude readings.
See "Using Reference Altitude Values" (page E-61) for information about how to make altimeter
readings more accurate.
See "How does the altimeter work?" (page E-70) for information about how the watch measures altitude.
Using Reference Altitude Values
To minimize the chance of reading error, you should update the reference altitude value before setting off
on a trek or any other activity where you plan to take altitude readings. While mountain climbing, it is
highly recommended that you check a map, local altitude indications, or some other source for your
current correct altitude and regularly update the reference altitude value with the latest information.
Reading error can be caused by changes in barometric pressure, and by temperature changes due to
change in barometric pressure and/or elevation.
Though altitude readings can be taken without setting a reference altitude, doing so may produce
readings that are very different from altitudes indicated by other altitude markers and indications.
Before performing the procedure below, look up the altitude of your current location on a map, the
Internet, etc.

To specify a reference altitude value

1. In the Altimeter Mode, hold down E for at least two seconds. SET
Hold will fl ash on the display and then ALTI will appear in the upper
display. Keep E depressed until ALTI appears.
The current altitude reading value will appear at this time.
2. Use A (+) or C (–) to change the current reference altitude value in
1-meter (5-foot) increments.
Change the reference altitude value to an accurate altitude reading
that you get from a map or other source.
You can set the reference altitude value within the range of –10,000
to 10,000 meters (–32,800 to 32,800 feet).
Pressing A and C at the same time returns to OFF (no reference
altitude value), so the watch performs air pressure to altitude
conversions based on preset data only.
3. Press E to exit the setting screen.
Using the Altitude Differential Value While Mountain Climbing or Hiking
After you specify the altitude differential start point while mountain climbing or hiking, you can easily
measure the change in the altitude between that point and other points along the way.

To use the altitude differential value

1. In the Altimeter Mode, check to make sure that an altitude reading is
on the display.
Destination
Destination
If an altitude reading is not displayed, press A to take one. See "To
altitude
altitude
take altitude readings" (page E-60) for details.
2. Use the contour lines on your map to determine the difference in
altitude between your current location and your destination.
3. In the Altimeter Mode, press E to specify your current location as the
altitude differential start point.
Current
Current
The watch will take an altitude reading and register the result as
location
location
the altitude differential value start point. The altitude differential
value will be reset to zero at this time.
Altitude
Altitude
differential
differential
4. While comparing the altitude difference you determined on the map
and the watch's altitude differential value, advance towards your
destination.
Altitude
Altitude
If the map shows that the difference in altitude between your
location and your destination is +80 meters for example, you know
you will be nearing your destination when the displayed altitude
differential value shows +80 meters.
Screen 2
E-57
E-59
E-61
E-63

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