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2172-10
Warning!
• The settings made by a proper automatic or manual
0.0 l (0 F) reset are
based on the actual temperature and other conditions under which you are
diving at that time, and so they are more accurate.
• The default zero depth pressure values is based on standard diving
conditions that do not take into account actual diving conditions, and so
they are less accurate than readings produced using data obtained by a
proper
0.0 l (0 F) reset.
Pressure Measurement Precautions
Temperature extremes
Correct pressure measurement may become impossible when the watch is
exposed temperature extremes, under conditions like the following.
• When the watch is exposed to direct sunlight for long periods
• When the watch is left in a car parked in to direct sunlight for a long time
If the watch is exposed to high temperature, place it into the water for 2 to 3
minutes before using it.
Subjecting the watch to sudden temperature changes can case depth
measurement errors (such as display of a depth of
1.0 l (4 F) or greater at
sea level).
Sudden Depth Changes
Depth readings are taken every three seconds, so the depth reading may
differ from actual depth in cases where sudden changes in depth are
occurring. When using the current depth reading to monitor your ascent, we
recommend that you ascend at a rate of approximately 10 meters (33 feet)
per minute (0.5m/2 feet every three seconds).
High-altitude Diving/Fresh-water Diving
The depth reading is automatically reset to 0.0 l (0 F) whenever you enter
the Diving Mode, so you can use this watch for diving at altitudes. Note,
however, that malfunctions occur when diving at altitudes greater than
approximately 4,000 meters (13,000 feet). Also remember that this watch
bases its calculations on seawater, with a specific gravity of 1.025, so
readings are incorrect for fresh-water diving. When fresh-water diving, you
must assume that you are approximately 2.5% deeper than the depth shown
by this watch.
Example: When the displayed depth is 20 meters, the actual depth is 20 × 1.025
= 20.5 meters.
In all cases, be sure to receive appropriate training before attempting high
altitude or fresh water diving.
Log Memory Precautions
• Log Memory data accompanied by a warning indicator is incorrect and
should not be utilized for dive planning, etc.
• Incorrect battery replacement procedures and servicing of the watch
causes all Log Memory data to be deleted. Be sure to make separate
written copies of all Log Memory data before having your watch serviced.
Helpful Information
About warning indicators
Appearance of a warning indicator ( ) indicates that the applicable data is
incorrect for some reason. When you recall this data in the Recall Mode, the
warning indicator appears along with the problem data.
Abnormal data can be caused by any of the following.
• Operational error (such as entering the Diving Mode while submerged,
resulting in incorrect
0.0 l (0 F) reset, etc.).
• Abnormal temperatures, caused by suddenly submerged the watch after
exposing it to direct sunlight for a long time.
• Low battery warning while diving.
• Sensor error (indicated by
err message).
What to do if a low battery warning appears during a dive
The low battery warning message (BATT) protects against a sudden
unexpected loss of battery power. After the low battery warning appears,
however, depth and temperature readings are disabled and only dive time
timing continues. Low battery power can also result in loss of some Log
Memory data.
Registering the correct dive start time
When initially entering the water, especially when jumping in from a relatively
high position, the pressure produced by impact with the surface of the water
can cause the pressure sensor to generate incorrect data. To make sure that
the data for your dive is correct, exit and then re-enter the Diving Mode to
perform
0.0 l (0 F) reset while on the surface.
Preset Log Memory data
The watch comes with sample data for a single dive in Log Memory for
demonstration purposes. To clear this data, hold down A for about two
seconds while in the Recall Mode or Dive Profile Mode.
Maximum measurable depth
This watch is designed to measure depths between 0.0 and 80.0 meters (0
and 263 feet). Exceeding a depth of 80.0 meters (263 feet) stores the
following data into memory.
Maximum Depth: dEEP
Average Depth: xx.x l (xx F)
The above readings also appear when the applicable Log Memory is recalled.
For recreational diving, you should normally dive no deeper than approximately
30 meters (99 feet).
Temperature Measurement Range
If a temperature measurement falls outside the range of –10.0°C (14.0°F) to
60.0°C (140.0°F), the display shows
xx.x.
Rest times
Note that a dive does not end until you exit the Diving Mode and enter the
Timekeeping Mode while on the surface (depth =
0.0 l (0 F)). This means
that diving, surfacing, and diving again is regarded as the same dive.
To end a dive and start a new one, return to the surface, exit the Diving Mode
and enter the Timekeeping Mode, and then re-enter the Diving Mode. Your
next dive will be treated as a new dive.
Operating buttons underwater
The buttons on your watch can be operated underwater without harming the
watch. However, we recommend that you refrain from doing so for safety’s
sake.
If you forget to enter the Diving Mode before starting a dive
Entering the Diving Mode while submerged sets a preset default value for the
zero depth pressure. Note that resulting data is accompanied by a warning
indicator (
) in the Log Memory, indicating that the data may not be accurate.
What happens to log data and surface interval if you change
the time and date
Log data and surface interval are not affected when you change the time and
date setting after completing a dive.
To extend battery life
Your watch uses most battery power when its pressure sensor is in operation.
Because of this, it is best to enter the Timekeeping Mode immediately after
completing a dive in order to preserve battery power. The number of dives
you make is directly related to the life of the battery, as shown below. Also,
note that battery life is affected by how much you use the backlight.
Based on 50 minutes per dive.
Note
Be sure to have the battery replaced at least once every two years,
regardless of how much you dive. When replacing the battery, your
authorized CASIO Service Point will also perform a full overhaul,
replacing the sealing material that is vital to the water resistance of your
watch.
When taking your watch on an airplane
Although there are no problems with taking your watch on an airplane, you
should note that if you enter the Diving Mode while in the airplane, it will be
impossible to revert to the Timekeeping Mode by holding down C. In this
case, first hold down A for at least two seconds to reset the depth reading to
0.0 l (0 F), and then hold down C for at least two seconds to re-enter the
Timekeeping Mode.
Number of dives per year Approximate battery life
50 2 years
100 21 months
200 18 months
300 14 month
Chambers and other High-pressure Environments
Though this watch is designed for use in underwater and atmospheric
environments up to 20 atmospheres, decompression after exposure to a helium
environment runs the risk of damage to the watch. Because of this, you should
never expose the watch to chamber test or other very high-pressure conditions.
If you enter the Diving Mode while under high pressure, you will not be able to
exit to the Timekeeping Mode by holding down C.
To change the unit of depth measurement
1. Use C to enter the Timekeeping Mode.
2. Hold down A until the seconds digits start
to flash, which indicates the setting screen.
3. Press C 9 times to move the flashing to
the depth unit setting (
l or F).
4. Press D toggle between the two settings.
5. Press A twice to exit the setting screen.