Operation Guide 3147
To view altitude records and the current Altimeter Mode stopwatch session record
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| Altitude records |
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| REC(1) |
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| REC(2) |
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| REC(20) |
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| MAX |
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| ASC |
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| DSC |
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| Historical record |
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C
E E E
MAX
MIN
ASC
DSC
B B B
B
1.Enter the Data Recall Mode.
2.Use the C button to cycle between the altitude records, current Altimeter Mode stopwatch record, and the historical record.
3.When the record you want is displayed, use the E (+) button and B
4.After you are finished viewing data, press D to exit the Data Recall Mode.
• Dashes (xxxx) will be displayed if data has been deleted or if there is no
corresponding data due to error, etc. In such cases, total ascent (ASC)
and total descent (DSC) values will show zero.
• When total ascent (ASC) or total descent (DSC) exceeds 99,995 meters (or 99,980 feet), the applicable value will restart from zero.
Clearing the Historical Record
Use the following procedure to clear the contents of the historical record and restart all values from zero.
To clear the historical record
1. Press the D button to enter the Data Recall Mode.
2. Hold down A.
• CLR will appear in the upper part of the display.
3. Keep A held down for an additional two seconds until CLR starts flashing.
•The historical record high altitude screen will reappear when data deletion is complete.
•If you release the A button part way through the above procedure, the watch will return to the historical record high altitude screen without deleting the data.
Barometer/Thermometer
This watch uses a pressure sensor to measure air pressure (barometric pressure) and a temperature sensor to measure temperature.
•You can calibrate the pressure sensor and the temperature sensor if you suspect that readings are incorrect.
To take barometric pressure and temperature readings
Barometric | Barometric | In the Timekeeping Mode, press the D button to | |
pressure | pressure | enter the Barometer/Thermometer Mode. This | |
graph |
| will start barometric pressure and temperature | |
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l l |
| measurements automatically. | |
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lll |
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| It can take up to four or five seconds for the |
l l |
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| barometric pressure reading to appear after |
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| you enter the Barometer/Thermometer Mode. |
•Barometric pressure is displayed in units of 1hPa (or 0.05 inHg).
Temperature
•The displayed barometric pressure value changes to xxxx hPa (or inHg) if a measured barometric pressure falls outside the range of 260 hPa to
1100 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 is displayed in units of 0.1°C (or 0.2°F).
•The displayed temperature value changes to xxx °C (or °F) if a measured temperature falls outside the range of
140.0°F). The temperature value will reappear as soon as the measured temperature is within the allowable range.
•In some areas, barometric pressure is expressed in millibars (mb) instead of hectopascals (hPa). It really makes no difference, because 1hPa = 1mb.
•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 select the temperature, barometric pressure, and altitude units”.
•See “Barometer and Thermometer Precautions” for important precautions.
Barometric Pressure Graph
Barometric pressure indicates changes in the atmosphere. By monitoring these changes you can predict the weather with reasonable accuracy.
This watch takes barometric pressure measurements automatically every two hours (at the top of each
The barometric pressure graph shows readings of previous measurements for up to 24 hours. The horizontal axis of the graph represents time, with each dot standing for two hours. The rightmost dot represents the most recent reading. The vertical axis of the graph represents barometric pressure, with each dot standing for the relative difference between its reading and that of the dots next to it. Each dot represents 1hPa.
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 that 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/mb to 1,100 hPa/mb or 7.65 inHg to 32.45 inHg)
•Sensor malfunction
Barometric Pressure Change Indicator
| Barometric pressure |
Barometric pressure graph | change indicator |
lll | A |
l | |
ll l |
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ll | ▲ |
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| A |
In the Barometer/Thermometer Mode, press the A button to toggle between the barometric pressure graph and the barometric pressure change indicator. This indicator ( ) indicates the relative difference between the most recent barometric pressure reading indicated on the barometric pressure graph, and the current barometric pressure value displayed in the Barometer/ Thermometer Mode.
•Pressure differential is indicated in the range of ±4 hPa, in
• The barometric pressure change indicator ( ) is not displayed when the displayed current barometric value is outside of the allowable measurement range (260 to 1,100 hPa).
•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.
| or | |
Barometric pressure | More than +4hPa | |
change indicator | ||
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| +3hPa | |
| +2hPa | |
| +1hPa | |
| ±0hPa | |
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| Less than |
About Barometric and Temperature Measurements
•Barometric pressure and temperature measurement operations are performed as soon as you enter the Barometer/Thermometer Mode. After that, barometric pressure and temperature measurements are taken every five seconds.
•During barometric pressure measurements, the watch may not be able to update its timekeeping display contents normally. Correct timekeeping is maintained internally, however.
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