Citizen 3111 User manual

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1. General
You can adjust the time in units of hour by one-touch button operation without
stopping the watch.
2. Structure
*Appearance may vary with model.
*The sub-watch is synchronous with the main watch.
*The day hand indicates the date of the main watch.
(
A
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Main watch hour hand
Main watch second hand
Main watch minute hand
Sub watch hour hand
Button
Crown
Date hand
English
CONTENTS
1. General ......................................................................................... 3
2. Structure ...................................................................................... 3
3. Adjusting the main watch ........................................................... 4
4. Adjusting the date ....................................................................... 5
5. Adjusting the sub-watch ............................................................ 6
6. Using the Register Ring ........................................................... 10
7. Precautions ............................................................................... 16
8. Specifications ............................................................................ 23

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4. Adjusting the date
* The day hand indicates the date of the main watch.
(1) Pull the crown out to the position where you can adjust the date.
(2) Turn the crown to adjust the date.
• Turning the crwon once to the left will increment the date value. Turning it to
the right does not work.
• The date varies in a period of 31 days. When the month ends at the 30th or
earlier, you have to adjust the date at the first of the next month manually.
• Don't adjust the date in between 7:00 pm and 1:00 am because the date might
not increment on the next day. Move the hand and adjust the date, avoiding
that time zone. After adjustment, adjust the main watch again.
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Date setting position
3. Adjusting the main watch
(1) When the second hand is at 0 second, pull the crown out to the position where
you can adjust the time.
(2) Turn the crown to adjust the main watch.
• It is at 0:00 am when the date increments. Don't mistake am for pm when
adjusting the time.
• To adjust the time more accurately, it will be convenient to advance the minute
hand 4-5 minutes ahead of the right value and turn it back.
(3) After adjusting the time in reference to a time signal, return the crown it the
normal position.
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Time correction position

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(Example) To adjust the sub-watch to the time at London when the main watch
reads 10:10 am at Tokyo.
The time difference between Tokyo and London is -9 hours. When it is
10:10 am at Tokyo, the time at London is 1:10 am. To correct the time
difference:
(2) Press the (A)-button nine times to move the hour hand of the sub-watch 9 hours
back to 1 o'clock.
*You can adjust the time in units of hour in reference to the main watch.
(1) Press the (A)-button once and the hour hand of the sub-watch goes back by an
hour (counterclockwise).
Press the (A)-button as many times as needed to correct time difference in
reference to the main watch.
5. Adjusting the sub-watch
(correcting time difference)
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Button

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* Cities (regions) in which daylight savings time is used are indicated with a ,
while those in which it is not are indicated with an ✕ .
* The time difference and use of daylight savings time of each city are subject to
change by the particular country.
<Time differences of main locations based on UTC>
Tokyo
Sydney
Noumea
Auckland
Honolulu
Anchorage
Los Angeles
Denver
Chicago
Mexico City
New York
Montreal
Caracas
Rio de Janeiro
Buenos Aires
City name
Time
difference
Daylight
savings time
Universal time constant
London
Paris
Rome
Cairo
Istanbul
Moscow
Kuwait
Dubai
Karachi
Dacca
Bangkok
Singapore
Hong Kong
Beijing
±0
±0
+1
+1
+2
+2
+3
+3
+4
+5
+6
+7
+8
+8
+8
+9
+10
+11
+12
-10
-9
-8
-7
-6
-6
-5
-5
-4
-3
-3
City name
Time
difference
Daylight
savings time
✕
✕
✕
✕
✕
✕
✕
✕
✕
✕
✕
✕
✕
✕

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Answer. Align “24” on the outer scale with “1:20” on the inner scale (time
scale). Then, the SPEED INDEX (▲) on the inner scale corresponds
to “18” on the outer scale. Thus, the air speed for the flight is 180
knots.
3) Flight diatance
Example: Obtain the air distance when the air speed is 210 knots and the flight
time is 40 minutes.
Answer. Align “21” on the outer scale with the SPEED INDEX (▲) on the
inner scale. then, “40” on the inner scale corresponds to “14” on the
outer scale. Thus, the air distance of the flight is 140 nautical miles.
4) Rate of fuel consumption
Example: Obtain the rate of fuel consumption (gallons / hour) when the flight
time is 30 minutes and the fuel consumption is 120 gallons.
Answer. Align “12” on the outer scale with “30” on the inner scale. Then, the
SPEED INDEX (▲) on the inner scale corresponds to “24” on the
outer scale. Thus, the fuel consumption is 240 gallons per hour.
5) Fuel consumption
Example: Obtain the fuel consumption required for a flight when the vate of
fuel consumption is 250 gallons per hour and the flight time is 6
hours.
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Speed index
Outer scale
(distance scale)
Inner scale
(Time acale)
The bezel design may vary depending on the
model.
[Calculation function]
Note the following points when using this func-
tion. Use the calculation function of this watch
only as a guide.These scales do not indicate
the position of the decimal point.
A. Navigational calculation
1) Time required
Example: Obtain the time required fo the fight of an aircraft at 180 knots for
450 nautical miles.
Answer. Align “18”on the outer scale with the SPEED INDEX (▲) on the
inner scale. Then, “45”on the outer scale corresponds to “2:30”on
the inner scale (time scale). Thus, the time required for the flight is 2
hours and 30 minutes.
2) Knots (air speed)
Example: Obtain the knots (air speed) for 240 nautical miles with a flight time
of 1 hour and 20 minutes.
6. Using the Register Ring

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8) Rate of climb (or descent)
The rate of climb (or descent) can be obtained from the time required to reach
an altitude.
Example: Obtain the rate of climb when an aircraft reaches an altitude of 7,500
feet after climbing for 16 minutes.
Answer. Align “75”on the outer scale with “16”on the inner scale. Then,
“10”on the inner scale correspons to “47”on the outer scale. Thus,
the rate of climb is 470 per minute.
9) Time of climb (or descent)
The time required for climb can be obtained from the altitude to be reached and
the rate of climb (or descent).
Example: Obtain the time of climb when an aircraft is to climb to 6,300 feet at
a rate of 550 feet per minute.
Answer. Align “55”on the outer scale with “10”on the inner scale. Then,
“63”on the outer scale corresponds to “11.5”on the inner scale.
thus, the time of climb is 11 minutes and 30 seconds.
10) Conversion
Example: Convert 30 statuts miles into nautical miles and kilometers.
Operation: Align “30”on the outer scale with STAT (▲) on the inner scale.
Then, NAUT (▲) on the inner scale corresponds to “26”nautical
miles on the outer scale, and “12 km”(s) on the inner scale corre-
sponds to “48.2”km on the outer scale.
Answer. Align “25”on the outer scale with the SPEED INDEX (▲) on the
inner scale. Then, “6:00”on the inner scale (time scale) corresponds
to “15”on the outer scale. Thus, the fuel consumption is 1,500 gal-
lons.
6) Estimated flight time
Example: Obtain the estimated flight time when the vate of fuel consumption is
220 gallons per hour and the aircraft has 550 gallons of fuel.
Answer. Align “22”on the outer scale with the SPEED INDEX (▲) on the
inner scale. Then, “55”on the outer scale corresponds to “2:30”on
the inner scale (time scale), Thus, the estimated flight time is 2 hours
and 30 minutes.
7) Difference in altitude
The difference in altitude can be obtained from the rate of descent and the de-
scent time.
Example: Obtain the difference in altitude when an aircraft continues descend-
ing for 23 minutes at a rate of 250 feet per minute.
Answer. Align “25”on the outer scale with “10”on the inner scale. Then, “23”
on the inner scale corresponds to “57.5”on the outer scale. Thus, the
difference in altitude is 5,750 feet.

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4) Square root
Example: Square root of 225
Operation: Turn the outer scale showly and find a value that corresponds to
both “22.5”on the outer scale and “10”on the inner scale. In this
example, “22.5”on the outer scale corresponds to “15”on the
inner scale, and “10”on the inner scale corresponds to “15”on
the outer scale. Thus, the answer is 15.
B. General Calculation Functions
1) Multiplication
Example: 20 ✕ 15
Operation: Align “20”on the outer scale with “10”on the inner scale. Then,
“15”on the inner scale corresponds to “30”on the outer scale.
Take into account the position of the decimal point and add one
zero to obtain 300. Note that with the scales of this watch, the
position of the decimal point cannot be obtained.
2) Division
Example: 250 / 20
Operation: Align “25”on the outer scale with “20”on the inner scale. Then,
“10”on the inner scale corresponds to “12.5”on the outer scale.
Take into eccount the position of the decimal point to obtain 12.5.
3) Proportion
Example: 30/20 = 60/x
Operation: Align “30”on the outer scale with “20”on the inner scale. Then,
“60”on the outer scale corresponds to “40”on the inner scale. At
this point,the proportion for every value on the inner and outer
scales is 30:20.

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Examples of use
Moderate exposure
to water (washing,
kitchen work,
swimming, etc.)
Marine sports
(skin diving)
Scuba diving
(with air tank)
Operation of the
crown or button with
moisture visible
OK
NO
For correct use within the design limits of the watch, confirm the level of water-
resistance of your watch, as indicated on the dial and case, and consult the table.
OK
NO NO
OK
NO
NO NO
NO
NO
NO
Minor exposure to water
(washing face, rain, etc.)
OK
7. Precautions
There are several types of water-resistant
watches, as shown in the following table.
The unit "bar" is roughly equal to 1 atmosphere.
* WATER RESIST(ANT) xx bar may also be
indicated as W.R. xx bar.
CAUTION: Water-resistance performance
Indication
Dial Case (Case back) Specification
WATER RESIST
or no indication
WR 50 or WATER
RESIST 50
WR 100/200 or
WATER RESIST
100/200
WATER
RESIST(ANT)
WATER
RESIST(ANT) 5 bar or
WATER RESIST(ANT)
WATER RESIST(ANT)
10bar/20 bar or
WATER RESIST(ANT)
Water-resistant to
3 atmospheres
Water-resistant to
5 atmospheres
Water-resistant to
10 / 20 atmospheres
OK
OK

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•If moisture has entered the watch, or if the inside of the crystal is fogged up and
does not become clear within a day, immediately take the watch to your dealer or
Citizen Service Center for repair. Leaving the watch in such a state will allow
corrosion to form inside.
•If seawater enters the watch, place the watch in a box or plastic bag and immedi-
ately take it in for repair. Otherwise, pressure inside the watch will increase, and
parts (crystal, crown, buttons, etc.) may come off.
CAUTION: Keep your watch clean.
•Dust and dirt tend to be deposited in gaps in the back of the case or band.
Deposited dust and dirt may cause corrosion and soil your clothing. Clean the
watch occasionally.
Cleaning the Watch
•Use a soft cloth to wipe off dirt, perspiration and water from the case and crystal.
•Use a soft, dry cloth to wipe off perspiration and dirt from the leather band.
•To clean a metal, plastic, or rubber watchband, wash away dirt with mild soap and
water. Use a soft brush to remove dust and dirt jammed in the gaps in the metal
band. If your watch is not water-resistant, take it to your dealer.
•Water-resistance for daily use (to 3 atmospheres): This type of watch is water-
resistant to minor exposure to water. For example, you may wear the watch while
washing your face; however, it is not designed for use underwater.
•Upgraded water-resistance for daily use (to 5 atmospheres): This type of watch is
water-resistant to moderate exposure to water. You may wear the watch while
swimming; however, it is not designed for use while skin diving.
•Upgraded water-resistance for daily use (to 10/20 atmospheres): This type of
watch may be used for skin diving; however, it is not designed for scuba or satu-
rated diving using helium gas.
CAUTION
•Do NOT operate the crown or button with wet fingers or when the watch is wet.
Water may enter the watch and compromise water-resistance.
•If the watch is used in seawater, rinse with fresh water afterward and wipe with a
dry cloth.

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•Do NOT use the watch in places where it is exposed to high temperature, such as
in a sauna.
Doing so may result in a skin burn.
•Do NOT leave the watch in a place where it is exposed to high temperature, such
as the glove compartment or dash-board of a car.
Doing so may result in deterioration of the watch, such as deformation of plastic
parts.
•Do NOT place the watch close to a magnet.
Timekeeping will become inaccurate if you place the watch close to magnetic
health equipment such as a magnetic necklace or a magnetic latch of a refrigera-
tor door or handbag clasp or the earphone of a mobile phone. If this has occurred,
move the watch away from the magnet and reset the time.
•Do NOT place the watch close to household appliances that generate static elec-
tricity.
Timekeeping may become inaccurate if the watch is exposed to strong static elec-
tricity, such as is emitted from a TV screen.
•Do NOT subject the watch to a strong shock such as dropping it onto a hard floor.
•Avoid using the watch in an environment where it may be exposed to chemicals
or corrosive gases.
NOTE: Avoid using solvents (thinner, benzine, etc.), as they may mar the finish.
WARNING: Handling of the battery
•Keep the battery out of the reach of small children. If a child swallows the battery,
contact a physician immediately.
CAUTION: Replacing the battery
•For replacement of the battery, take your watch to your dealer or Citizen Service
Center.
•Replace the battery as soon as possible if the service life of the battery has ex-
pired. Leaving a depleted battery in the watch may result in leakage, which can
damage the watch severely.
CAUTION: Operating environment
•Use the watch within the operating-temperature range specified in the instruction
manual.
Using the watch where temperatures are outside the specified range, may result
in deterioration of functions or even stoppage of the watch.