Taking Barometric Pressure And Temperature Readings - Casio 5114 Operation Manual

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" 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.
4. While in the Timekeeping Mode or in any of the sensor modes, press
Current Current
C to take a compass reading.
location location
• 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
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".

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
B to enter the Barometer/Thermometer Mode.
by second hand by second hand
• 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.
Pressing E toggles the digital display between the barometric
•
pressure and temperature screen.
After you press B, the watch takes readings every fi ve seconds for
•
the fi rst three minutes, and then every two minutes after that.
2. Press D to return to the Timekeeping Mode.
Barometric Barometric Barometric Barometric
• The watch will return to the Timekeeping Mode automatically if you
pressure pressure pressure pressure
do not perform any operation for about one hour after entering the
graph graph
Barometer/Thermometer Mode.
To take barometric pressure and temperature readings
While in the Timekeeping Mode or in any of the sensor modes, press B.
• The watch will start taking barometric pressure and temperature
readings automatically.
• You also can take a barometric pressure and temperature reading at
Temperature Temperature
any time by pressing B in the Barometer/Thermometer Mode.
Press E 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".
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.
Operation Guide 5114
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.
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 and the value of the last
barometric pressure reading taken by the watch (which is shown on the
digital display).
Barometer/Thermometer Mode Second Hand Units
The second hand indicates barometric
pressure differentials up to ±10hPa (in
1-hPa units).
• The nearby illustration, for example,
shows what the second hand would
indicate when the calculated differential
is approximately 5 hPa (approximately
0.15 inHg).
• The second hand will point to OVER or
UNDER if the barometric pressure
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.
• Barometric pressure is calculated and
displayed using hPa as the standard.
The barometric pressure differential
also can be read in inHg units as shown
in the illustration (1 hPa = 0.03 inHg).
Pressure Sensor and Temperature Sensor Calibration
The pressure sensor and temperature sensor built into the watch are calibrated at the factory and normally
require no further adjustment. If you notice serious errors in the pressure readings and temperature
readings produced by the watch, you can calibrate a sensor to the reading of another device to correct the
errors.
Important!
• Incorrectly calibrating the pressure sensor can result in incorrect readings. Before changing the
calibration value, make sure the readings you are using are reliable and accurate.
• Incorrectly calibrating the temperature sensor can result in incorrect readings.
Carefully read the following before doing anything.
– Compare the readings produced by the watch with those of another reliable and accurate thermometer.
– If adjustment is required, remove the watch from your wrist and wait for 20 or 30 minutes to give the
temperature of the watch time to stabilize.
To calibrate the pressure sensor and the temperature sensor
1. Take a reading with another measurement device to determine the
exact current barometric pressure or temperature.
2. With the watch in the Timekeeping Mode or in any of the sensor
modes, press B to enter the Barometer/Thermometer Mode.
3. Hold down E until each of the following steps occurs.
Hold SET appears on the digital display. ➝ The current temperature
•
value fl ashes.
4. Press D to move the fl ashing between the temperature value and
Press D. Press D.
barometric pressure value, to select the one you want to calibrate.
5. Use A (+) and C (–) to adjust the calibration value in the units shown
below.
Temperature
Barometric Pressure
• To return the currently fl ashing value to its initial factory default
setting, press A and C at the same time. OFF will appear at
the fl ashing location for about one second, followed by the initial
default value.
6. Press E to return to the Barometer/Thermometer Mode screen.
Barometer and Thermometer Precautions
• The pressure sensor built into this watch measures changes in air pressure, which you can then apply
to your own weather predictions. It is not intended for use as a precision instrument in offi cial weather
prediction or reporting applications.
• Sudden temperature changes can affect pressure sensor readings.
• Temperature measurements are affected by your body temperature (while you are wearing the watch),
direct sunlight, and moisture. To achieve a more accurate temperature measurement, remove the
watch from your wrist, place it in a well ventilated location out of direct sunlight, and wipe all moisture
from the case. It takes approximately 20 to 30 minutes for the case of the watch to reach the actual
surrounding temperature.
Current pressure Current pressure
greater than most greater than most
0.3 0.3
0.15 0.15
inHg values inHg values
10 10 5 5
hPa values hPa values
0 0
−10 −10 −5 −5
−0.3 −0.3
−0.15 −0.15
recent measured recent measured
pressure pressure
0.1°C (0.2°F)
1 hPa (0.05 inHg)
Not visible on Not visible on
the display. the display.
recent measured recent measured
pressure pressure
Second hand Second hand
0 0
Current pressure Current pressure
less than most less than most
5