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• Confirm that "ERR" (error) or "CHK" (check) is not displayed on the display.
• Confirm that the band is securely attached to the watch body.
• Confirm that the band and glass are free of cracks, scratches, chips and other
abnormalities.
• Confirm that the time and date are set correctly.
• Confirm that the depth alarm and dive time alarm are set correctly.
• If there is a considerable difference between the watch temperature and the water
temperature (such as in cases of entering water after having the left the watch in bright
sunlight), water depth cannot be measured accurately. In such cases, immerse the
watch in the water for at least 5 minutes and then dive after the watch temperature has
become acclimated to the water temperature.
<Cautions During Diving>
• Avoid ascending too rapidly. Rapid ascending can cause decompression sickness and
have other detrimental effects on the body. Observe the safe ascent rate at all times.
• Please note that when underwater, it may be difficult to hear the sound of the dive alarm
or other alarms depending on surrounding conditions (such as breathing noise and air
bubble noise) and the manner in which the watch is worn.
• Be careful not to run out of air. This watch does not manage the amount of air remaining
in the air tank. The diver is responsible for managing the amount of air remaining.
• In the event the watch should happen not to operate properly while underwater, either
ascend immediately while following the instructions of the instructor or begin ascending
immediately at an ascent rate of no more than 18 m per minute and make a safety stop
at 5 m as long as your air lasts.
<Cautions After Diving>
• Make sure to rest sufficiently after diving by checking the surface mode (which measures
the amount of time elapsed after diving and no fly time).
• After removing any moisture, mud, sand or other foreign matter adhered to the watch by
thoroughly rinsing with fresh water, completely wipe off the watch with a dry cloth.
• Do not attempt to remove the sensor cover or poke at it with a sharp object to attempt to
remove any dirt or debris trapped in the pressure sensor. In addition, do not spray the
pressure sensor with air under high pressure such as that from an air gun. In the case
that debris has become trapped in the pressure sensor, rinse it out with fresh water. If it
is still unable to be removed, consult Citizen Consumer help desk or your nearest
Customer Support Center.
CAUTION
Fresh Water Diving
• This watch is designed on the premise of diving in salt water. It will not display water
depth accurately in water other than salt water.
• Only use the watch after receiving special safety training when using the watch for diving
in fresh water.
• Since this watch displays water depth as converted based on salt water (specific gravity:
1.025), the true water depth in fresh water is actually 2.5% deeper than the displayed
water depth.
• Example: Water depth displayed as 20 m x 1.025 = 20.5 m (actual water depth)
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WARNING
This watch cannot be used as a primary instrument for diving.
When using the watch during diving, always make sure to receive the proper
diving instruction and training and use the watch while obeying all rules.
• Inspect the watch to make sure that all functions operate properly before diving.
• It is recommended to only use this watch for recreational diving down to a depth of about
18 m. Do not attempt to dive below the limit depth of 40 m during recreational diving.
• Always make sure to allow an ample margin for no-decompression time.
• Perform adequate safety stops and decompression stops. Even in the case of no-
decompression diving, always make a safety stop at 5 m to ensure safety. In addition, in
the case the decompression stop display appears, try to stop for a period longer than
that indicated on the display.
• Allow for a sufficient rest period after diving in accordance with safety rules. Boarding an
airplane or moving to a high altitude without allowing for a sufficient rest period after
diving results in the risk of decompression sickness.
PROHIBITED
Prohibited Use During Diving
Never attempt to use this watch for diving under the following circumstances.
• When diving is prohibited in the system monitor mode:
··· The watch will not switch to the dive mode when [
] has changed to NG.
• When the watch has stopped running or an error has occurred (be careful not to bump
the watch against hard objects such as equipment or rocks when diving).
• When measuring depth outside the guaranteed water temperature range or at high
altitudes:
··· The temperature range in which the water depth measurement accuracy of this watch
is guaranteed is +10 to +40°C.
··· This watch is not compatible with diving at high altitudes. Never use this watch when
diving at high altitudes (300 m or more above sea level).
• When engaged in dangerous behavior or when a situation is judged to be dangerous:
··· This watch is not built to function as a preventive or emergency instrument such as for
use during marine accidents.
• When using in a helium gas atmosphere (saturation diving, etc.):
··· Use under these conditions can cause a malfunction or damage to the watch.
• Use for nitrox diving:
··· This watch cannot be used for diving using a mixed gas other than that of air tanks for
ordinary air diving.
WARNING
Cautions Regarding Use During Diving
<Cautions Before Diving>
• Sufficiently charge the watch and confirm that the watch is reliably charged and that the
watch can be used for diving by referring to the system monitor mode. If the watch is not
sufficiently charged, the watch will not switch to the dive mode even if diving is started.
In addition, try to start a dive after first sufficiently charging the watch before diving to
avoid having the watch become insufficiently charged while diving.
