Taking Barometric Pressure And Temperature Readings - Casio 5114 Operation Manual

4. Press to start the calibration operation.
• - - - is shown on the digital display while calibration is being performed. When calibration is
successful, the digital display will show OK and then change to the Compass Mode screen ( - - -).
Using the Compass While Mountain Climbing or Hiking
This section provides two practical applications for using the watch's built-in compass.
• Setting a map and fi nding your current location
Having an idea of your current location is important when mountain climbing or hiking. To do this, you
need to "set the map", which means to align the map so the directions indicated on it are aligned with
the actual directions of your location. Basically what you are doing is aligning north on the map with
north as indicated by the watch.
• Finding the bearing to an objective
To set a map and fi nd your current location
1. With the watch on your wrist, position it so the face is horizontal.
2. While in the Timekeeping Mode or in any of the sensor modes, press
• The reading result will appear on the digital display after about two seconds, and the second hand
will point to north.
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To fi nd the bearing to an objective
1. Set the map so its northerly indication is aligned with north as indicated
by the watch, and determine your current location.
• See "To set a map and fi nd your current location" on page E-40 for
information about how to perform the above step.
2. Set the map so the direction you want to travel on the map is pointed
straight in front of you.
Objective Objective
3. With the watch on your wrist, position it so the face is horizontal.
Current Current 4. While in the Timekeeping Mode or in any of the sensor modes, press
location location
to take a compass reading.
• The reading result will appear on the digital display after about two
seconds, and the second hand will point to north.
12 o'clock 12 o'clock
position position
5. Still holding the map in front of you, turn your body until north as
indicated by the watch and the northerly direction on the map are
aligned.
• This will position the map in accordance with your current location,
so the bearing to your objective is straight ahead of you.
North indicated by North indicated by
second hand second hand
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Taking Barometric Pressure and Temperature Readings

This watch uses a pressure sensor to measure air pressure (barometric pressure) and a temperature
sensor to measure temperature.
To enter and exit the Barometer/Thermometer Mode
Barometric pressure Barometric pressure
differential indicated differential indicated 1. While in the Timekeeping Mode or in any of the sensor modes, press
by second hand by second hand
to enter the Barometer/Thermometer Mode.
• BARO appears on the digital display to indicate that barometric
pressure and temperature readings are being taken. The current
barometric pressure or temperature appears on the digital display
after readings are complete.
• When you press
direction of the
Thermometer Mode. After that, the second hand will point at the
current barometric pressure differential.
• Pressing
pressure and temperature screen.
Barometric Barometric Barometric Barometric
• After you press
pressure pressure pressure pressure
the fi rst three minutes, and then every two minutes after that.
graph graph
2. Press to return to the Timekeeping Mode.
• The watch will return to the Timekeeping Mode automatically if you
do not perform any operation for about one hour after entering the
Barometer/Thermometer Mode.
Temperature Temperature
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Barometric Pressure Graph
Barometric pressure indicates changes in the atmosphere. By monitoring
Barometric Barometric
these changes you can predict the weather with reasonable accuracy.
pressure graph pressure graph
This watch takes barometric pressure measurements automatically every
two hours (at the 30th minute of every even numbered hour).
Measurement results are used as the data to create the barometric
pressure graph that appears on the digital display, and the second hand
indicates the barometric pressure differential.
Reading the Barometric Pressure Graph
The barometric pressure graph shows readings of previous measurements for up to 16 hours.
• The horizontal axis of the graph represents time, with each dot
Barometric Barometric
standing for two hours. The rightmost dot represents the most recent
pressure pressure
reading.
• The vertical axis of the graph represents barometric pressure, with
Time Time each dot standing for the relative difference between its reading and
that of the dots next to it. Each dot represents 1 hPa.
The following shows how to interpret the data that appears on the barometric pressure graph.
A rising graph generally means improving weather.
A falling graph generally means deteriorating weather.
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Operation Guide 5114 5214
to take a compass reading.
, the second hand will fi rst point in the
(BARO) button. This indicates the Barometer/
toggles the digital display between the barometric
, the watch takes readings every fi ve seconds for
3. Rotate the map without moving the watch so the northerly direction
North indicated North indicated
indicated on the map matches north as indicated by the watch.
on the map on the map
• If the watch is confi gured to indicate magnetic north, align the
map's magnetic north with the watch indication. If the watch has
been confi gured with a declination to correct to true north, align
the map's true north with the watch indication. For details about
magnetic declination correction, see "Calibrating the Bearing
Sensor" (page E-36).
• This will position the map in accordance with your current location.
Current Current
4. Determine your location as you check the geographic contours around
location location
N N
you.
N N
North indicated by North indicated by
second hand second hand
Compass Precautions
This watch features a built-in magnetic bearing sensor that detects terrestrial magnetism. This means that
north indicated by this watch is magnetic north, which is somewhat different from true polar north. The
magnetic north pole is located in northern Canada, while the magnetic South Pole is in southern Australia.
Note that the difference between magnetic north and true north as measured with all magnetic compasses
tends to be greater as one gets closer to either of the magnetic poles. You should also remember that
some maps indicate true north (instead of magnetic north), and so you should make allowances when
using such maps with this watch.
Location
• Taking a direction reading when you are near a source of strong magnetism can cause large errors in
readings. Because of this, you should avoid taking direction readings while in the vicinity of the
following types of objects: permanent magnets (magnetic necklaces, etc.), concentrations of metal
(metal doors, lockers, etc.), high tension wires, aerial wires, household appliances (TVs, personal
computers, washing machines, freezers, etc.).
• Accurate direction readings are impossible while in a train, boat, air plane, etc.
• Accurate readings are also impossible indoors, especially inside ferroconcrete structures. This is
because the metal framework of such structures picks up magnetism from appliances, etc.
Storage
• The precision of the bearing sensor may deteriorate if the watch becomes magnetized. Because of
this, you should store the watch away from magnets or any other sources of strong magnetism,
including: permanent magnets (magnetic necklaces, etc.) and household appliances (TVs, personal
computers, washing machines, freezers, etc.).
• Whenever you suspect that the watch may have become magnetized, perform the procedure under "To
perform bidirectional calibration" (page E-38).
To take barometric pressure and temperature readings
While in the Timekeeping Mode or in any of the sensor modes, press
• The watch will start taking barometric pressure and temperature readings automatically.
• You also can take a barometric pressure and temperature reading at any time by pressing
Barometer/Thermometer Mode.
• Press to toggle the digital display between the barometric pressure and temperature screen.
• It can take up to four or fi ve seconds for the barometric pressure reading to appear after you enter the
Barometer/Thermometer Mode.
Barometric Pressure
• Barometric pressure is displayed in units of 1 hPa (or 0.05 inHg).
• The displayed barometric pressure value changes to - - - if a measured barometric pressure falls outside
the range of 260 hPa to 1,100 hPa (7.65 inHg to 32.45 inHg). The barometric pressure value will reappear
as soon as the measured barometric pressure is within the allowable range.
Temperature
• Temperature is displayed in units of 0.1 °C (or 0.2 °F).
• The displayed temperature value changes to - - - °C (or °F) if a measured temperature falls outside the
range of –10.0 °C to 60.0 °C (14.0 °F to 140.0 °F). The temperature value will reappear as soon as the
measured temperature is within the allowable range.
Display Units
You can select either hectopascals (hPa) or inchesHg (inHg) as the display unit for the measured
barometric pressure, and Celsius ( °C) or Fahrenheit ( °F) as the display unit for the measured temperature
value. See "To specify temperature, barometric pressure, and altitude units" (page E-69).
Note
• If there are sudden changes in weather or temperature, the graph line of past
measurements may run off the top or bottom of the display. The entire graph will
become visible once barometric conditions stabilize.
• The following conditions cause the barometric pressure measurement to be skipped,
with the corresponding point on the barometric pressure graph being left blank.
– Barometric reading that is out of range (260 hPa to 1,100 hPa or 7.65 inHg to 32.45
inHg)
– Sensor malfunction
About the barometric pressure differential indicated by the second hand
In the Barometer/Thermometer Mode, the second hand indicates the
Second hand Second hand
difference between the value of the last barometric pressure reading
displayed in the barometric pressure graph (page E-46) and the value of
the last barometric pressure reading taken by the watch (which is shown
on the digital display).
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E-43
.
in the
E-45
Not visible on Not visible on
the display. the display.
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