Casio 5450 User Manual

This indicator shows the relative difference between the most recent barometric pressure reading and the current barometric pressure value displayed in the Barometer/Thermometer
Mode (page E-23).
Interpreting Barometric Pressure Differential Levels
The pressure differential is indicated in the range of ±5 hPa, in 1-hPa units.
If the level indicator is here: It means this:
Plus (+) side Pressure is rising and the weather will tend to improve.
Minus (–) side Pressure is falling and the weather will tend to deteriorate.
The nearby screenshot, for example, shows the level indicator when the calculated pressure differential is approximately –3 hPa (approximately –0.09 inHg).
CASIO Watch 5450 - approximately
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 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, press C to enter the Barometer/Thermometer Mode.
3. Hold down A until the current temperature value starts to fl ash on the display. This is the setting screen.
• Before the temperature value starts to fl ash, the message SET Hold will appear on the display.
Keep A depressed until SET Hold disappears.
4. Press C to move the fl ashing between the temperature value and barometric pressure value, to select the one you want to calibrate.
5. Use D (+) and B (–) to adjust the calibration value in the units shown below.
Temperature 0.1°C (0.2°F)
Barometric Pressure 1 hPa (0.05 inHg)
• To return the currently fl ashing value to its initial factory default setting, press B and D at the same time. OFF will appear at the fl ashing location for about one second, followed by
the initial default value.
6. Press A 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.
Altimeter
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 (page E-34).
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

Casio 5450 Specifications

General

Brand	Casio
Model	5450
Category	Watch
Language	English