Depth Gauge - Casio 2825 Operation Manual

To specify barometric pressure and temperature units
1. Enter the Timekeeping Mode.
2. Hold down A until the seconds start to flash,
which indicates the setting screen.
3. Use D to select either the temperature unit or
barometric pressure unit setting.
• See step 2 under "To set the time and date"
for information about how to scroll through
setting screens.
4. When the setting you want to change is flashing, press E to toggle
between the available settings.
• Temperature Units: Fahrenheit (
• Barometric Pressure Units: inchesHg (inHg) or Hectopascals (hPa)
5. After the settings are the way you want, press A to exit the setting screen.
• Changing the barometric pressure unit automatically restarts the
barometric pressure history graph.
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 for the first two or three minutes.
• The indicator flashes while the watch is taking a barometric
pressure reading.
• The barometer automatically takes measurements every three hours
(starting from midnight), regardless of what mode you are in. The results of
these measurements are used for plotting points on the barometric
pressure history graph.
• You can also perform a barometric pressure and temperature measurement
at any time by pressing C in the Barometer/Thermometer Mode.
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 official 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.

Depth Gauge

The pressure sensor of the watch can also be used to perform underwater
depth measurement while skin diving or snorkeling. Depth readings are taken
every three seconds, and displayed as a value up to 30 meters (98 feet). You
can store the data of your last dive in log memory, including total time
submerged, maximum depth, and water temperature at the maximum depth
attained during your dive. You can view the log data of your last dive before
beginning a new dive, and even take direction readings while in the Depth
Gauge Mode.
Important!
• Never use this watch to measure depth while scuba diving.
• This watch is designed to start depth measurement and record data in
memory after a depth of 1 meter (4 feet) is reached. Because of this, the
explanations in this manual uses the term "submerged" to refer to any
depth deeper than 1 meter, and the "on the surface" to refer to any depth
shallower than 1 meter.
• Leaving the watch in the Depth Gauge Mode while not in the water consumes
battery power. Exit the Depth Gauge Mode whenever you are not using it.
What is "a dive"?
A dive starts when you pass a depth of one meter (about four feet) while the
watch is in the Depth Gauge Mode. The dive ends when you are on the
surface and exit the Depth Gauge Mode. A dive does not end if you surface
but do not exit the Depth Gauge Mode.
Enter the Depth Gauge Mode.
Depth = 1.0 m
(4 ft.)
Start of dive
20 sec.
Maximum depth
30 sec.
Total time submerged: 1 minute 50 seconds
Operation Guide 2825
° °
F) or Celsius ( C)
Exit the Depth Gauge Mode.
End of dive
1 min.
• Remember that the term "dive" as used in this manual refers to skin diving
or snorkeling only.
• The watch will start depth measurement automatically when the sensor
detects that your depth exceeds one meter (about four feet).
• Depth measurement stops automatically whenever your depth becomes
less than one meter (four feet).
• Depth measurement restarts whenever you re-submerge past one meter
(four feet). All data that is measured between the start of the dive and the
end of the dive is treated as part of the same dive, no matter how many
times you surface during the dive.
To perform depth measurement
1. Before beginning a dive, in the Timekeeping,
Elapsed measurement time
Digital Compass, or Barometer/Thermometer
Mode, press E to enter the Depth Gauge
Mode.
• It can take up to four or five seconds until
2. Enter the water and submerge past one meter
Current depth
(four feet) to start the dive.
3. When you want to end the dive, return to the surface and then press D to
exit the Depth Gauge Mode.
• Exiting the Depth Gauge Mode causes the data accumulated during the
dive (time submerged, maximum depth attained, water temperature at
maximum depth) to be stored in log memory.
• The watch will not exit the Depth Gauge Mode if any value other than
) is displayed for the depth when you press D. If
(or 0
appear on the display even though you are on the surface (depth of less
than 1 meter/4 feet), perform the procedure under "To manually reset the
reference depth to 0 meters (feet)".
• See "Log Data" for information about viewing dive data.
Important!
Note the following important precautions whenever using the Depth Gauge
Mode.
Before Skin Diving/Snorkeling
• Before beginning a dive, check to make sure that none of the
following marks are shown on the display.
❑ CHARGE (indicating a weak battery)
❑ RECOV. (indicating a weak battery)
❑
Err (indicating sensor malfunction)
• Make sure that (or 0 ) is displayed at your current depth.
• Make sure that the watch is set to the correct time of day.
• Check the glass, case and band for cracks or chips.
• Make sure that the band is fastened securely around your wrist.
While Skin Diving/Snorkeling
• Check to make sure that timer operation and depth measurement are
being performed properly.
• Take care when skin diving/snorkeling near rocks or coral to avoid
scratching the watch.
After Skin Diving/Snorkeling
• To avoid corrosion, rinse your watch thoroughly with fresh water to
remove salt water, dirt, etc. When possible, soak the watch in fresh
water overnight to make sure that all salt is removed.
• When using a metal band, occasionally clean inside the gaps in the
band using a soft toothbrush and soapy water. Failure to do so can
result in corrosion of the timepiece, soiling of clothing or irritation to
sensitive skin.
Depth Gauge Mode Precautions
• After you enter the Depth Gauge Mode, the watch automatically takes a
reference pressure reading and sets the result a 0 meters (feet). This
means that before starting a dive, you should enter the Depth Gauge Mode
while at the water's surface, never while the watch is submerged.
• A major change in air temperature or other phenomena while you are using
the Depth Gauge Mode can cause the display to show a value other than 0
meters (feet) when you are at the surface of the water. If this happens, reset
the reference depth to 0 meters (feet). See "To manually reset the reference
depth to 0 meters (feet)" for more information.
• Depth values are displayed in units of 0.1 meter (or 1 foot).
(or ) appears on the display whenever your depth is less than one
• 0
meter (four feet).
• dEEP is displayed in place of the depth value whenever your depth is
greater than 30 meters (98 feet). If you continue to dive deeper after
appears, . will appear in place of the depth value. If
xx x
the display after you surface, hold down D for three seconds to exit the
Depth Gauge Mode. If . keeps appearing in place of the depth value, it
xx x
could mean that the sensor is malfunctioning. Take the watch to the place
where you purchased it or to some other CASIO retailer to have it checked.
• If the elapsed measurement time exceeds three hours, the watch will
automatically switch to the Timekeeping Mode and store the data for the
current dive into log memory.
(or 0 ) appears on the display.
(or 0 ) does not
dEEP
. remains on
xx x
3