Precautions For Diving Mode Use; Making Accurate Depth Readings; High Altitude & Freshwater Diving; Before Diving - Citizen C500 Instruction Manual

J. Precautions for Diving Mode Use

Making accurate depth readings

1. Switch the watch to the Diving Mode shortly before diving.
In case the watch, though being used on land, is out in the diving mode because the water
sensor senses moisture such as sweat, make the watch released from the diving mode by
wiping off the moisture, then switch it to the diving mode again.
2. Avoid too rapid descent and ascent when diving. In case the diver rapidly ascends at a
rate of 1.5 meters (5 ft) or more per 10 seconds, the ascending speed alarm beeps for
more than 10 seconds and the display of depth readings becomes flashing, not allowing
proper measurement. When the diver rapidly descends or ascends at a rate of 4 meters
(15 ft) or more per second, the display indicate ER (Error).
High altitude & Freshwater diving
When the Diving Mode is activated, the depth is calibrated at 0 meter.
However, an accurate measurement is not possible at altitudes over 4,000 meters
(13,124 ft). Do not use this watch when diving in such places. Further, this watch displays
changes in depth based on a standard of seawater (density 1,025).
Depths indicated in fresh water will actually be about 2.5% over indicated.
Be sure to complete appropriate safety training before diving in fresh water or at high
altitudes.
(Example) 20 meters in fresh water (indicated depth) X 1.025 = 20.5 meters (actual depth)
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Before diving

1. Make sure that the crown is pushed all the way in and locked in place.
2. Make sure that there are no cracks or other damage to the watch band or the glass face.
Damage to the band may result in the band breaking and loss of the watch.
3. Make sure that the band is firmly anchored to the watch body.
4. Make sure that the register ring rotates properly.
5. Make sure that the time and date are correctly set.
6. Make sure that the second hand is moving correctly.
* If the second hand is moving in 2-second increments, then the battery is low. In this case, do
not use for diving. Request battery replacement at the place of purchase or by contacting a
Citizen Service Center directly.

During diving

1. Never operate the buttons other than button A during a dive. Doing so may cause a fault
such as poor water resistance.
2. The time alarm is set to OFF during a dive, so take care.
3. The dive alarm or ascending alarm may be hard to hear in water, depending on the sur-
roundings (such as the sound of air bubbles) and the watch wearing conditions, so take
care in using the alarm.
4. Be careful not to hit the watch against solid matter such as equipment or rocks.

After diving

1. After making sure that the crown is locked in place, wash the watch free of seawater, mud
and sand using fresh water, Wipe completely with a dry cloth.
2. Do not attempt to remove the sensor cover or remove any dirt or debris clogging the
sensor portion of the watch, using a sharp instrument. Rather flush out such debris using
fresh water. If this fails, please consult a Citizen Service Center.
3. For general repairs and maintenance please refer to "Care for long term use" on pages
54-59.
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