Citizen C52 User Manual

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This is a combination (analog and digital display) diver’s watch with a depth meter installed. When diving, various data related to diving (present depth/diving time/maximum depth) appears on the digital display. Apart from the log data memory function which records the diving data from four dives, there is also a ascending speed alarm function which warns the diver with an alarm sound if the ascending speed is too fast.

Highly Reliable “200m Diving Water-resistant Performance”

The highly reliable water-resistant performance conforms to ISO diver’s watch standards. * ISO diver’s watch standards have been set by the International Organization

for Standardization.

< ISO/6425, May 15th, 1984 >

All repairs on this product, including battery replacement, should be done at a Citizen Service Center. Request repairs or an inspection by Citizen at the place of purchase or send directly to a Citizen Service Center.

English

Before using the watch, read this instruction manual carefully for safe and correct use. After reading this manual, keep it for your further reference.

This symbol is followed by instructions the negligence of which might result in death or serious injury.

This symbol is followed by instructions the negligence of which might result in injury or damage to property.

Safety precautions - Instructions to be followed at all times. In order to prevent injury to yourself or other persons and damage to property, this manual describes the instructions which you should strictly follow:

■ Injury and/or damage which might be caused by using the watch improperly, neglecting any of the instructions or precautions in this manual, are classified with the following symbols.

WARNING CAUTION

CAUTION

■ The instructions for safe operation are classified with the following symbols.

Warning (caution) symbol followed by instructions for safe operation and/or precautions that you should take

Prohibition symbol followed by "don'ts" (what you should not do)

Recreational diving involves risks.Use this watch for diving after you have undergone scuba diving training from a qualified instructor, obtained the necessary experience and skills for safe diving, and fully understood the watch’s handling operation.

WARNING

Diving is a fundamentally dangerous sport. When diving with this watch, make sure you fully understand and follow the instructions on handling described in this manual.

The depth measurement function of this watch is not approved as a measuring instrument for official organizations. Use it as an auxiliary or backup instrument.

Diving with this watch is limited to recreational diving (non-decompression diving). Do not use it for decompression diving, saturation diving or diving at high altitude. It can be used in seawater in a temperature range of 10˚C - 40˚C (50˚F - 104˚F), but it does not indicate correct depths in water other than seawater (specific gravity 1.025). The watch’s display and performance are also affected by sudden changes in atmospheric pressure or changes in the water temperature. It must be used in combination with other instruments.Always use this watch’s display as an approximate guide.

H. HOW TO USE THE LOG MODE .................................................................32

I. HOW T O USE THE DEPTH/DIVING TIME ALARM....................................36

1. HOW TO SET THE DEPTH ALARM.......................................................37

2. HOW TO SET THE DIVING TIME ALARM.............................................38

J. HOW T O USE THE DIVE MODE ................................................................39

1. DEPTH METER DISPLAY.......................................................................42

2. DIVING TIME MEASUREMENT..............................................................43

K. THIS WATCH’s W ARNING FUNCTIONS....................................................44

1. ASCENDING SPEED WARNING FUNCTION........................................44

2. ABNORMAL DEPTH WARNING FUNCTION .........................................45

L. IN CASE OF THE FOLLOWING.................................................................46

M. ALL RESET ................................................................................................49

N. BATTERY....................................................................................................50

O. OTHER FUNCTIONS..................................................................................52

1. REGISTER RING....................................................................................52

2. NO DECOMPRESSION LIMITS .............................................................53

P. CARE OF YOUR WATCH ............................................................................54

Q. SPECIFICATIONS.......................................................................................60

CONTENTS

WARNING..........................................................................................................6

A. DIVING WITH THIS W A TCH .......................................................................10

DIVING WITH THIS WATCH.......................................................................10

DEPTH METER FUNCTION.......................................................................10

FOR SAFE DIVING.....................................................................................11

PROHIBITION WHEN DIVING....................................................................12

PRECAUTIONS FOR DIVING ....................................................................13

DIVING AT HIGH ALTITUDE AND IN FRESHWATER................................15

B. NAMES AND FUNCTIONS OF PARTS......................................................16

C. SWITCHING MODES..................................................................................20

1.TIME MODES [\ DIVING MODES......................................................21

2. SWITCHING TIME MODES....................................................................22

3. SWITCHING DIVING MODES................................................................23

D. HOW TO SET THE DIGITAL TIME ..............................................................24

E. HOW TO SET THE ANALOG TIME............................................................26

F. HOW T O USE THE ALARM........................................................................27

G. HO W TO USE THE CHRONOGRAPH........................................................29

CAUTION FOR SAFE DIVING

• Always use the ‘buddy system’ when diving.

• This product is recommended for sports diving to depths of about 15-20m (50-65ft).

• Early batter y replacement is recommended. A new battery will last approximately 2 years.(This will vary according to the frequency of use of the depth meter function.)

• Rest fully after diving as specified by safety rules. Riding in an airplane or moving to a high altitude too soon after diving can bring about decompression sickness.

A. DIVING WITH THIS WATCH

CAUTION DIVING WITH THIS WATCH

• Only use this diving watch after undergoing correct instruction and training in diving and always obey the accompanying rules.

• Make sure you fully understand the handling of the watch and the caution items in order to use it correctly. Please note that the watch may not function correctly if you handle it other than as indicated in this instruction manual.

WARNING DEPTH METER FUNCTION

• This watch’s depth meter function is not approved as a depth meter for official organizations. Use it as an auxiliary or backup instrument.

• Only use this watch’s depth meter values as a guideline.

CAUTION PRECAUTIONS FOR DIVING

< Before diving >

• Make sure that the crown is pushed firmly in and locked in place.

• Make sure that the band is firmly attached to the watch body.

• Make sure that there are no cracks, flaws or chips on the watch band or glass.

• Make sure that the register ring will rotate correctly.

• Make sure that the time and calendar are set correctly.

• Make sure that the depth alarm and diving time alarm are set correctly.

• Make sure that the second hand is moving correctly.

* If the second hand is moving in 2 second increments, then the battery is

low. Request battery replacement by Citizen at the place of purchase or send directly to a Citizen Service Center.

PROHIBITION PROHIBITION WHEN DIVING

Do not use this watch for diving in the following cases.

• When the low battery warning function is activated. ...When the life of the battery is near ing its end, the second hand moves in 2

second intervals.

• When the watch stops or exhibits any abnormal functioning.

• The depth measurement is outside the assured temperature range. ...The temperature range in which the accuracy of this watch’s depth meter

is guaranteed is +10˚C - +40˚C (50˚F - 104˚F).

• In potentially dangerous activities or conditions. ...This watch is not designed for use in maritime emergencies or to prevent

sea disasters, etc.

• When using a helium enriched environment. ...This might cause breakdown or damage.

CAUTION DIVING AT HIGH ALTITUDE AND IN

FRESHWATER

• Be sure to complete special safety training before diving in fresh water or at high altitude.

• Do not use this watch at altitudes over 4,000 meters (13,124ft), because accurate measurement is not possible.

• This watch displays change in depth based on a standard of seawater (density 1.025), so the actual depth in fresh water will be 2.5% greater than the depth displayed.

Example: 20m/66ft (indicated depth) X 1.025 = 20.5m/68ft (actual depth)

The pressure sensor is calibrated to the surrounding pressure at a depth of 0m (0ft) when the watch is switched to Diving Modes.Sealevel is also set to 0m (0ft) when the watch is switched to Diving Modes in a lake at high altitude. However, do not use at an altitude of over 4,000m (13,124ft) because accurate measurement is not possible.

< During diving >

•Avoid ascending very quickly to prevent your body from being affected by the bends, etc. Surface at a safe speed of within 9m/30ft. per minute.

This ascending speed is in accordance with the U.S.Navy Diving Manual (1993 edition).

•Never operate the crown or any buttons except button

when underwater.

Doing so may result in a fault such as poor water resistance.

• Be careful because the alarm may be hard to hear underwater because of the sound of your breathing.

< After diving >

• After making sure that the crown is locked in place, wash the watch free of seawater, mud and sand using fresh water, then wipe the water off with a dry cloth.

•Do not attempt to remove the sensor cover and remove any dirt or debris clogging the sensor with a sharp instrument. If there is any debris, flush it out with fresh water.If you cannot do so, consult a Citizen Service Center.

B. NAMES AND FUNCTIONS OF PARTS

- Read in conjunction with the watch diagram at the beginning of this manual.

Name

: Button

Press once Press for 2 seconds or more

: Button

Press once Press for 2 seconds or more

: Button

Press once

Press for 2 seconds or more 1: Digital display 2: Crown 3: Hour hand 4: Minute hand 5: Second hand

Time Modes

Time/Calendar

Switches between hours, minutes/seconds/date, day

— —

To time/calendar adjustment status

To Alarm Mode

To Diving Modes

A/P, hours, minutes/seconds/date, day

Use to adjust the analog time

Normally shows “hours”

Normally shows “minutes”

Normally shows “seconds”

Time Modes

Alarm Chronograph

ON/OFF Start/Stop

—— — Split time/Reset

To alarm set time adjustment —

To Chronograph Mode To Time/Calendar Mode

To Diving Modes To Diving Modes

A/P, hours, minutes or OFF Minutes, seconds, 1/100 seconds

Use to adjust the analog time

Normally shows “hours”

Normally shows “minutes”

Normally shows “seconds”

6: Rotating bezel ...You can use this rotating bezel to approximately measure

the diving time and remaining time.

7: Pressure sensor ... Senses water pressure to measure the depth.

Name

: ButtonAPress once

Press for 2 seconds or more

: ButtonBPress once

Press for 2 seconds or more

: ButtonMPress once

Press for 2 seconds or more 1: Digital display 2: Crown 3: Hour hand 4: Minute hand 5: Second hand

Diving Modes

Log Mode

Memo (logged) recall

—

To Dive Mode

—

Shows the following log No. *1

To Time Modes

Use to adjust the analog time

Normally shows “hours” Normally shows “minutes” Normally shows “seconds”

Diving Modes

Depth Alarm Mode Dive Time Alarm Mode Dive Mode

Depth Alarm correction Dive time alarm correction Dive time/max. depth recall

Depth Alarm quick correction Dive time alarm quick correction

—

To Dive Mode To Dive Mode —

——To Log Mode *3

To Dive Time Alar m Mode To Log Mode —

To Time Modes To Time Modes To Time Modes *3

Set depth Set dive time (minutes)

Current depth/Dive time/max.depth

Use to adjust the analog time

Normally shows “hours”

Normally shows “minutes”

Normally shows “seconds”

*1 To Depth Alarm Mode when log no. 4 is shown *2 Log No./Dive date/Dive start time/Max. depth/Diving time

*3 Pushing the button does not switch the mode during diving (when a depth of

1m/4ft or more is shown).

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