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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.
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). 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.
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).
Temperature Measurement Range
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.
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).
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.
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.
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.
Number of dives per year 50 100 200 300 Approximate battery life 2 years 21 months 18 months 14 month
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).
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.
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.
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.
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.
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.
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.
