Operation Guide 2891
Taking Pressure and Temperature Readings
❚To take pressure and temperature readings
In the Timekeeping Mode, Compass Mode, or Altitude Mode, press the B button to enter the Pressure/Temperature Mode. The display will show the barometric pressure and pressure tendency graph, and temperature.
Pressure/Temperature Mode Display | Barometric Pressure |
| Measurement Range: 260hPa to 1,100hPa |
Pressure Tendency Graph | Measurement Unit: 1hPa |
Interpreting the Pressure Tendency Graph
The pressure tendency graph shows 30 hours (16 readings) of | Example Pressure Tendency Graphs |
barometric pressure readings that are taken automatically by the | The following examples show how you can predict upcoming |
watch. | weather conditions based on the pressure tendency graph. When |
• A plot on the graph indicates the relative change from one reading | using the pressure tendency graph, remember that changes in |
to the next. Each level represents a relative change of 1hPa. | your altitude and environmental conditions can affect air pressure |
The pressure tendency graph is mainly for tracing changes in | and show up as changes on the pressure tendency graph. |
barometric pressure, which can be used to predict upcoming | • Continual rise in barometric pressure |
weather. |
|
Pressure 
•The display will show “– – –
Temperature
Measurement Range:
o
Rising barometric pressure indicates that upcoming weather will be fair.
Pressure
Differential
Graph
Temperature
Measurement Unit: 0.1 C
•For a temperature of
•The display will show “– –
A plot may be skipped because it is outside the range of the currently displayed graph when the change between readings is extremely large due to movement between different altitudes, an extreme change in weather, an extreme change in temperature, etc. If the next plot is near the reading that is outside the range of the current graph, the graph will shift to
•Continual drop in barometric pressure
•The barometric pressure can take up to four or five seconds to appear after you enter the Pressure/Temperature Mode.
Barometric Pressure and Temperature Readings
After you enter the Pressure/Temperature Mode, the watch takes readings every five seconds for three minutes. After that, the watch will take a reading whenever you press the B button.
•When measuring outdoor temperatures, remove the watch from your wrist and place it in a location where its readings will not affected by body temperature, sweat (water droplets), direct sunlight, etc.
Pressure Tendency Graph
The pressure tendency graph shows the results of barometric pressure readings that are taken automatically every two hours.
If you do not perform any button operation for two or three minutes while in the Pressure/Temperature Mode, the watch will return to the Timekeeping Mode automatically.
show both of the plots.
Falling barometric pressure indicates that upcoming weather will deteriorate.
• Temperature and humidity can affect pressure graph contents.
Not visibleBecause of this, pressure tendency graph contents are intended for reference only.
•The watch will not take a barometric pressure reading if a measurement time arrives while the barometric pressure sensor is malfunctioning, while rechargeable battery power is low, or while the watch is in the function sleep state.
Interpreting the Pressure Differential Graphic
In excess of ±15hPa
Graphic displayed at 9 o’clock
❚To turn the pressure differential graphic on and off
The pressure differential graphic shows the relative difference between the barometric pressure reading taken when you enter the Pressure/Temperature Mode and the last of the readings the watch takes every two hours.
•The graphic shows changes up to ±15hPa, in 1hPa units.
•You can turn display of the pressure differential graphic off, if you want.
Example 1: Temperature differential =
+15hPa
Data used for 
comparison
Indicator appears 
at 9 o’clock
•The graphic does not appear when the barometric pressure reading is outside the measurement range (260 to 1100hPa).
1. In the Pressure/ Temperature Mode, hold down the Ebutton for about two seconds until “SET” appears at the top of the display.
•After about four or five seconds, the barometric pressure value will appear in the middle of the display.
Pressure
(2 seconds)
Temperature
3. Press the C button to toggle the setting on (display graphic) and off (do not display graphic).
4. Press the E button to exit the setting screen and return to the Pressure/
±0hPa
Pressure Differential Graphic
2. Press the D button twice to move the flashing to the pressure differential graphic On/OFF setting.
Temperature Mode screen.
Example 2: Temperature differential = +15hPa
Pressure Differential Graphic (+15hPa)
(Twice)
• The watch automatically exits the pressure differential graphic on/ off setting screen if you do not perform any operation for about two or three minutes.
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