Casio SGW300H-1AV User Manual

Operation Guide 3202

3

•

 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.

1. Make sure the watch is in the Timekeeping Mode.

2. Press

D to start Altimeter measurement.

•

ALTI will appear on the display, indicating that 
Altimeter measurement is in progress. The first 
reading will appear on the display after about four 
or five seconds.

•

 The current altitude value is displayed in units of 5 

meters (20 feet).

•

 After the first reading is obtained, the watch 

continues to take altimeter readings automatically 
every five seconds for the first three minutes, and 
then every two minutes after that.

•

 If you leave the watch in the Altimeter Mode, it will update the displayed altitude 

value regularly.

•

 Temperature is measured in the Barometer/Thermometer Mode and in the 

Altimeter Mode.  For details about temperature readings, see "Temperature".

3. After you are finished using the Altimeter, press

C to return to the Timekeeping 

Mode and stop auto measurement.

•

 The watch will return to the Timekeeping Mode automatically if you do not 

perform any operation for about 10 hours after entering the Altimeter Mode.

•

 The measurement range for altitude is –700 to 10,000 meters (–2,300 to 32,800 

feet).

•

 The displayed altitude value changes to - - - - if an altitude reading falls outside the 

measurement range. An altitude value will reappear as soon as the altitude reading 
is within the allowable range.

•

Normally, displayed altitude values are based on the watch’s preset conversion 
values. You also can specify a reference altitude value, if you want. See “Specifying 
a Reference Altitude Value” below.

•

 You can change the unit for displayed altitude values to either meters (m) or feet (ft). 

See “To specify temperature, barometric pressure, and altitude units”.

Specifying a Reference Altitude Value
The altitude readings produced by this watch are subject to error caused by changes 
in air pressure. Because of this, we recommend that you update the reference altitude 
value whenever accurate altitude information is available during your climb. After you 
specify a reference altitude value, the watch adjusts its air-pressure-to-altitude 
conversion calculation accordingly.

1. In the Altimeter Mode, hold down 

A until the current 

reference altitude value starts to flash. This is the 
setting screen.

•

 Before the reference altitude value starts to flash, 

the message SET Hold will appear on the display. 
Keep 

A depressed until SET Hold disappears.

2. Press 

D (+) or B (–) to change the current reference 

altitude value by 5 meters (or 20 feet).

•

 Specify a reference altitude value based on 

accurate altitude information about your current 
location from a map, etc.

•

 You can set the reference altitude value within the range of –10,000 to 10,000 

meters (–32,800 to 32,800 feet).

•

Pressing 

B and D at the same time returns to OFF (no reference altitude value), 

so the watch performs air pressure to altitude conversions based on preset data 
only.

3. Press 

A to exit the setting screen.

How does the altimeter work?
Generally, air pressure and temperature decrease as altitude increases. This watch 
bases its altitude measurements on International Standard Atmosphere (ISA) values 
stipulated by the International Civil Aviation Organization (ICAO). These values define 
relationships between altitude, air pressure, and temperature.

0 m

500 m

1000 m

1500 m

2000 m

2500 m

3000 m

3500 m

4000 m

899 hPa

795 hPa

701 hPa

616 hPa

8.5°C

2°C

–4.5°C

–11°C

15°C

1013 hPa

About 6.5°C 
per 1000 m

About 8 hPa per 100 m

About 9 hPa per 100 m

About 10 hPa per 100 m

About 11 hPa per 100 m

About 12 hPa per 100 m

0 ft.

2000 ft.

4000 ft.

6000 ft.

8000 ft.

10000 ft.

12000 ft.

14000 ft.

25.84 inHg

22.23 inHg

19.03 inHg

44.7°F

30.5°F

16.2°F

59.0°F

29.92 inHg

About 3.6°F 
per 1000 ft.

About 0.15 inHg per 200 ft.

About 0.17 inHg per 200 ft.

About 0.192 inHg per 200 ft.

About 0.21 inHg per 200 ft.

Source: International Civil Aviation Organization

•

 Note that the following conditions will prevent you from obtaining accurate readings:

There are two standard methods of expressing altitude: Absolute altitude and relative 
altitude. Absolute altitude expresses an absolute height above sea level. Relative 
altitude expresses the difference between the height of two different places.

Height of building 130 m 
(relative altitude)

Rooftop at an altitude of 
230 m above sea level 
(absolute altitude)

l l l l

ll

lll

ll

ll

ll

ll

l l l l l l l l

ll

lll

ll

ll

ll

ll

l l l l l l l l

ll

lll

ll

ll

ll

ll

l l l l l l l l

ll

lll

ll

ll

ll

ll

l l l l

•

 This watch estimates altitude based on air pressure. This means that altitude 

readings for the same location may vary if air pressure changes.

•

 The semiconductor pressure sensor used by the watch for altitude measurements 

is also affected by temperature. When taking altitude measurements, do not subject 
the watch to temperature changes.

•

 Do not rely upon this watch for altitude measurements or perform button operations 

while sky diving, hang gliding, or paragliding, while riding a gyrocopter, glider, or 
any other aircraft, or while engaging in any other activity where there is the chance 
of sudden altitude changes.

•

 Do not use this watch for measuring altitude in applications that demand 

professional or industrial level precision.

•

 Remember that the air inside of a commercial aircraft is pressurized. Because of 

this, the readings produced by this watch will not match the altitude readings 
announced or indicated the flight crew.

Use the procedure below to specify the temperature, barometric pressure, and altitude 
units to be used in the Barometer/Thermometer Mode and the Altimeter Mode.

Important!
When TYO (Tokyo) is selected as the Home City, the 
altitude unit is set automatically to meters (m), the 
barometric pressure unit to hectopascals (hPa), and the 
temperature unit to Celsius (°C). These settings cannot 
be changed.

To specify temperature, barometric pressure, and altitude units
1. In the Timekeeping Mode, hold down 

A until the currently selected city code starts 

to flash. This is the city code setting screen.

•

 Before the city code starts to flash, the message SET Hold will appear on 

the display. Keep 

A depressed until SET Hold disappears and the city code 

starts to flash.

2. Keep pressing 

C until TEMP (temperature), ALTI (altitude), or BARO (barometric 

pressure) appears in the upper left corner of the screen.

•

 See step 3 under “To change the current time and date settings” for information 

about how to scroll through setting screens.

3. Perform the operations below to specify the units you want.

Temperature

D

°C (Celsius) and °F (Fahrenheit)

Altitude

D

m (meters) and ft (feet)

Barometric Pressure

D

hPa (hectopascals) and inHg (inches of mercury)

4. After the settings are the way you want, press 

A to exit the setting screen.

Though you can perform altitude and temperature measurements at the same time, 
you should remember that each of these measurements requires different conditions 
for best results. With temperature measurement, it is best to remove the watch from 
your wrist in order to eliminate the effects of body heat. In the case of altitude 
measurement, on the other hand, it is better to leave the watch on your wrist, because 
doing so keeps the watch at a constant temperature, which contributes to more 
accurate altitude measurements.

•

 To give altitude measurement priority, leave the watch on your wrist or in any other 

location where the temperature of the watch is kept constant.

•

 To give temperature measurement priority, remove the watch from your wrist and 

allow it to hang freely from your bag or in another location where it is not exposed 
to direct sunlight. Note that removing the watch from your wrist can affect pressure 
sensor readings momentarily.

You can use the World Time Mode to view the current 
time in one of 31 time zones (48 cities) around the globe. 
The city that is currently selected in the World Time Mode 
is called the “World Time City”.

To enter the World Time Mode
Use

C to select the World Time Mode (WT) as shown in 

“Selecting a Mode”.

•

WT will appear on the display for about one second. 
Next, the display will change to show the city code of 
the currently selected World Time City.

To view the time in another time zone
In the World Time Mode, use 

D (East) to scroll through 

city codes.

1. In the World Time Mode, use 

D (East) to display the 

city code (time zone) whose Standard Time/Daylight 
Saving Time setting you want to change.

2. Hold down 

A until DST Hold appears on the display 

and then disappears. Release 

A after DST Hold

disappears.

•

 This toggles the city code you selected in step 

1 between Daylight Saving Time (DST indicator 
displayed) and standard time (DST indicator not 
displayed).

•

 You cannot use the World Time Mode to change the current standard time/

daylight saving time (DST) setting of the Home City.

•

 Note that you cannot switch between standard time/daylight saving time 

(DST) while UTC is selected as the World Time City.

•

 Note that the standard time/daylight saving time (DST) setting affects only the 

currently selected time zone. Other time zones are not affected.

l l l

ll

ll

ll

ll

l l l ll

lll

ll

ll

l l l ll

lll

ll

ll

l l l ll

lll

ll

ll

l