Taking Altitude Readings - Casio 5114 Operation Manual

Taking Altitude Readings

The watch displays altitude values based on air pressure readings taken by a built-in pressure sensor.
How the Altimeter Measures Altitude
The altimeter can measure altitude based on its own preset values (initial default method) or using a
reference altitude specifi ed by you.
When you measure altitude based on preset values
Data produced by the watch's barometric pressure sensor is converted to approximate altitude based on
ISA (International Standard Atmosphere) conversion values stored in watch memory.
When you measure altitude using a reference altitude specifi ed by you
After you specify a reference altitude, the watch uses that value to convert
barometric pressure readings to altitude.
• When mountain climbing, you can specify a reference altitude value in
accordance with a marker along the way or altitude information from a
map. After that, the altitude readings produced by the watch will be more
accurate than they would without a reference altitude value.
To take an altimeter reading
1. Make sure the watch is in the Timekeeping Mode or any one of the
Altitude differential Altitude differential
sensor modes.
indicated by second hand indicated by second hand
• The sensor modes are: Compass Mode, Barometer/Thermometer
Mode, and Altimeter Mode.
2. Press A to start Altimeter measurement.
• ALTI will appear on the digital display, indicating that Altimeter
measurement is in progress. The fi rst reading will appear on the
digital display after about four or fi ve seconds.
• The current altitude value is displayed in units of 5 meters (20 feet).
• After the fi rst reading is obtained, the watch continues to take
altimeter readings automatically every fi ve seconds for the fi rst
three minutes, and then every two minutes after that (under initial
default settings).
Current Current Altitude Altitude
• If you leave the watch in the Altimeter Mode, it will update the
attitude attitude graph graph
displayed altitude value regularly and indicate reading-to-reading
changes in graph form.
• You can use the procedure under "Selecting an Altitude Auto
Measurement Method" to specify the altitude auto measurement
method you want to use.
3. After you are fi nished using the Altimeter, press D to return to the
Timekeeping Mode and stop auto measurement.
• The watch will return to the Timekeeping Mode automatically if you
do not perform any operation for about 10 hours after entering the
Altimeter Mode (under initial default settings).
Reading the Altitude Graph
The altitude graph shows Altimeter Mode auto measurement readings over time.
• The vertical axis of the graph represents altitude, and each dot stands
Latest Latest
reading reading
for 10 meters (40 feet).
• The horizontal axis represents time. For the altitude readings taken
during the fi rst three minutes after you start an altimeter measurement
Altitude Altitude operation, each dot represents fi ve seconds. After that, each dot
represents two minutes (under initial default settings).
• An out of range reading or a measurement error will cause the column
of dots for that reading to be blank (skipped).
Time Time
Note
• The measurement range for altitude is –700 to 10,000 meters (–2,300 to 32,800 feet).
• 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 "Specifying a Reference Altitude Value".
• You can change the unit for displayed altitude values to either meters (m) or feet (ft). See "To specify
temperature, barometric pressure, and altitude units".
Selecting an Altitude Auto Measurement Method
You can select either of the following two altitude auto measurement methods.
0'05 1H: Readings at fi ve-second intervals for one hour
2'00 10H: Readings at fi ve-second intervals for the fi rst three minutes followed by two-minute
intervals for approximately 10 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 10 hours (altitude auto measurement method: 2'00 10H) or after
one hour (altitude auto measurement method: 0'05 1H).
To select the altitude auto measurement method
1. In the Altimeter Mode, hold down E until each of the following steps
occurs.
Hold SET appears on the digital display. ➝ Hold SET disappears.
•
2. Press D to display the current altitude auto measurement method
setting.
• This will cause either 0'05 or 2'00 to fl ash on the digital display.
3. Press A to toggle the altitude auto measurement method setting
between 0'05 1H and 2'00 10H.
4. Press E to exit the setting screen.
Using the Altitude Differential Value
In the Altimeter Mode, the part of the watch's dial from 11 o'clock to 7
Altitude differential Altitude differential
o'clock acts as an altitude differential scale. The second hand points to a
indicated by second hand indicated by second hand
place on the scale that indicates the difference between the altitude at a
start point set by you and the altitude at your current location. The altitude
differential indication is updated each time the watch takes an altitude
reading.
You can confi gure the watch so each second mark in the altitude
differential scale stands for 5 meters (20 feet) or 50 meters (200 feet).
See "Confi guring the Altitude Differential Scale" for information about how
to confi gure this setting.
• The second hand will point to OVER or UNDER if the altitude
differential is outside the allowable range of the scale.
• The second hand will move to 9 o'clock if a sensor reading could not
be taken for some reason or if the reading is outside the allowable
range.
• See "Using the Altitude Differential Value While Mountain Climbing or
Hiking" for some real-life examples of how to use this feature.
Operation Guide 5114
B B
A A
1000 m (4000 ft)
Unit: 50 m (200 ft)
100 m (400 ft)
Unit: 5 m (20 ft)
−100 m (−400 ft)
−1000 m (−4000 ft)
Confi guring the Altitude Differential Scale
You can select either of the two altitude differential scale options described below.
To specify this:
Scale step: 5 meters (20 feet) per second mark
Scale range: ±100 meters (± 400 feet)
Scale step: 50 meters (200 feet) per second mark
Scale range: ±1000 meters (± 4000 feet)
• Altitude differential is always calculated in meters, even when feet is selected as the altitude
measurement unit.
To change the altitude differential scale step unit
1. In the Altimeter Mode, hold down E until each of the following steps
occurs.
Hold SET appears on the digital display. ➝ Hold SET disappears.
•
2. Press D twice.
• This will cause either 100 or 1000 to fl ash on the digital display.
3. Press A to toggle the altitude differential scale step unit between 100
and 1000.
4. Press E to exit the setting screen.
To set the altitude differential start point
In the Altimeter Mode, press E.
• The watch will take an altitude reading and record the result as the
current differential start point. At this time, the second hand will point
to 0 because that is the current altitude differential.
Altitude differential Altitude differential
indicated by second hand indicated by second hand
Using the Altitude Differential Value While Mountain Climbing or Hiking
After you specify the altitude differential start point while mountain climbing or hiking, you easily can
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 digital display.
Destination Destination
If an altitude reading is not displayed, press A to take one. See "To
•
altitude altitude
take an altimeter reading" 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.
4. While comparing the altitude difference you determined on the map
Altitude differential Altitude differential
and the watch's altitude differential value, advance towards your
indicated by second hand indicated by second hand
destination.
• If the map shows a difference of +80 meters between your current
location and your destination, you will know that you are
approaching your destination when the second hand is pointed
at +80 meters.
Altitude Altitude
Specifying a Reference Altitude Value
The altitude readings produced by this watch are subject to error caused by changes in air pressure.
Because of this, we recommend that you update the reference altitude value whenever one is available
during your climb. After you specify a reference altitude value, the watch adjusts its air-pressure-to-altitude
conversion calculation accordingly.
To specify a reference altitude value
1. In the Altimeter Mode, hold down E until each of the following steps
occurs.
Hold SET appears on the digital display. ➝ Hold SET disappears.
•
2. Press A (+) or C (–) to change the current reference altitude value
by 5 meters (or 20 feet).
• Specify a reference altitude value based on accurate altitude
information about your current location from a map, etc.
• 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.
Current altitude
500 m (2000 ft)
reading greater than
previous reading
50 m (200 ft)
Second hand
0 0
−50 m (−200 ft) Current altitude
reading less than
previous reading
−500 m (−2000 ft)
Select this setting:
100
1000
6