Citizen F158 Setting Guide
Thank you for your purchase of this Citizen watch.
Before using the watch, read this instruction manual carefully to ensure
correct use.
After reading the manual, store it in a safe place for future reference.
Be sure to visit the Citizen website at http://www.citizenwatch-global.com/ .
Here you will find a variety of information such as electronic setting guides,
answers to frequently asked questions, Eco-Drive recharging information and
more.
To check the movement number
A case number—4 alphanumeric characters and 6 or
more alphanumeric characters—is engraved on the
case back. (Figure on the right)
The first 4 characters of the case number represent
the movement number of the watch. In the example
on the right, “
” is the movement number.
Engraving position example
The engraving position may
differ depending on watch
model.
1
Safety precautions — IMPORTANT
This manual contains instructions that should be strictly followed at all times
not only for optimal use, but to prevent any injuries to yourself, other persons or
property. We encourage you to read the entire booklet (especially, pages
99
) and understand the meaning of the following symbols:
■ Safety advisories are categorized and depicted in this manual as follows:
DANGER
WARNING
CAUTION
2
Highly likely to cause death or serious injury
Can cause serious injury or death
Can or will cause minor or moderate injury or damage
86
-
Safety p recautio ns — IMPORTANT
■ Important instructions are categorized and depicted in this manual as follows:
(Following symbols are examples of Pictograms.)
Warning (caution) symbol followed by prohibited matters.
Warning (caution) symbol followed by instructions that should be
followed or precautions that should be observed.
3
Precautions to be taken when diving
PROHIBITED
• Do not use your watch while diving when the watch stops or exhibits any abnormal operation.
CAUTION
• Persons using the diver’s watch are strongly recommended to receive proper instruction and
training pertaining to diving and observe those rules at all times.
• Please use this watch properly only after you fully understand the operating procedures and
cautions.
Using this watch other than as indicated in this instruction manual may result in failure of the
watch to function properly.
• Check the water-resistant indications on the watch face or the case back. Never dive beyond
the indicated depth.
CAUTION
• Check items below before diving
- Check to see if the watch is sufficiently charged and the insufficient charge warning
(2-second interval movement) is not activated.
- Make sure that the watch is running correctly (check the movements of the time/calendar/
second hand)
- Check to see if the crown is properly pushed in and the screw down push button is securely
locked.
4
Do not use this watch while diving when...
Diving with the watch
Before diving
Precauti ons to be taken w hen diving
- Make sure that the band is firmly anchored to the watch body.
- Make sure that there are no cracks or other damage to the watch band or the glass face.
- Make sure that the register ring rotates properly.
CAUTION
• Do not push any push buttons or pull out the crown in the water. Operating any of them in
water may cause trouble including deterioration of water resistance.
• Be careful not to hit the watch against hard objects such as equipment or rocks.
CAUTION
• Check to see if the crown is pushed in and the screw down push button is locked before
removing the sea water, dirt, and sand attached to the watch with fresh water. Then, wipe the
fresh water.
During diving
After diving
5
Features
Satellite Wave-GPS
Receives location and time information sent from GPS
satellites and adjusts the time and calendar on the watch
automatically.
200 m water resistant watch for diving
This watch has 200 m water resistance and can be used for
air diving with an air tank (SCUBA diving). (You cannot use
it for saturation diving using helium gas.)
It conforms with the standard of ISO 6425: 2018.
Diving mode
It prevents wrong operation of the watch during diving; it also halts some
functions such as satellite signal reception to keep the current time indicated.
Eco-Drive
No periodical battery replacement is needed. This watch is fueled by light.
6
Light-Level Indicator
Indicates current power generation amount.
It can be used as a reference for choosing a good charging place.
World time
Indicates the time around the world by choosing one of 38 time zones.
±5-second average monthly accuracy
Keeps high accuracy without time signal reception.
Perpetual calendar
No need for monthly and leap-year date correction until February 28, 2100.
* “Eco-Drive” is an original technology of Citizen.
Featur es
7
CONTENTS
Precautions to be taken when diving ................
Before using this watch ...........................
Band adjustment ........................................
Protective stickers .......................................
How to use a specially designed crown/button ...........
4
12
13
13
14
Component identification .........................
Checking the power reserve and power generation
amount .......................................
Checking the reception result of the satellite signal ...
8
16
18
24
CONTENTS
Setting the world time ...........................
Checking the current time zone setting ..................
Obtaining location information from satellite signals .....
Setting the time zone manually. . . . . . . . . . . . . . . . . . . . . . . . . .
26
27
34
36
Receiving time information .......................
Switching summer time (DST) and standard time .....
Using the diving mode ...........................
Charging your watch .............................
Continued on the next page
37
44
46
48
9
CONTENTS
Information on satellite signal reception ............
Checking and adjusting the leap second setting .........
Checking and adjusting the rollover number setting .....
54
59
62
Adjusting the time and calendar manually ..........
Using the rotating bezel ..........................
Troubleshooting .................................
Checking and correcting the reference position ..........
Symptom and remedies .................................
10
66
72
74
74
78
CONTENTS
Eco-Drive watch handling precautions ..............
Water resistance .................................
Precautionary items and usage limitations ..........
Specifications ..................................
100
86
90
92
11
Before using this watch
This watch has a rechargeable cell which is charged by
exposing the dial to light.
Expose the dial to direct sunlight regularly to charge the
watch. For details of charging, see pages 48 -.
• Especially, satellite signal reception is power consuming.
Take care.
After unpacking, the following must be done before using the watch:
1
Checking the current power reserve (page 20)
2
Setting the world time (page 26)
3
Receiving the satellite time signal (page 37)
12
Before us ing this watc h
Band adjustment
We recommend seeking the assistance of an experienced watch technician
for sizing of your watch. If adjustment is not done correctly, the bracelet may
unexpectedly become detached leading to loss of your watch or injury (excluding
products containing the band adjustment tool).
Consult an authorized service center.
Protective stickers
Be sure to remove any protective stickers that may be on your watch (case back,
band, clasp, etc.). Otherwise, perspiration or moisture may enter the gaps between
the protective stickers and the parts, which may result in a skin rash and/or
corrosion of the metal parts.
Continued on the next page
13
Before us ing this watc h
How to use a specially designed crown/button
Some models are equipped with a specially designed crown and/or push button to
prevent accidental operation.
Screw down crown/button
Unlock the crown/button prior to operate your watch.
Unlock Lock
14
Screw down
crown
Screw down
push button
Rotate the crown
counterclockwise
until it releases
from the case.
Rotate the
locking screw
counterclockwise,
and loosen unti l it
stops.
Push the crown i n to the case.
With gentle pressure towards
the case, rotate the crown
clockwise to secure it to the
case. Be sure to t ighten firmly.
Rotate the locking screw
clockwise, and tighten f irm ly.
Recessed button
Press the button with a non-marring narrow-tipped object.
• Metal objects may cause marring or scratching of
the button.
Before us ing this watc h
15
Component identification
Hands and buttons
16
Function hand
Second hand
N
O
L
A
S
H
H
N
A
O
R
R
M
O
P
N
L
A
E
D
R
E
D
O
D
N
O
I
A
R
N
R
E
F
O
A
E
M
M
T
-
X
C
R
Y
S
N
O
G
A
P
A
L
A
G
N
E
D
L
A
W
T T
X
M F
S S
A
N
C
ON
H
OFF
A
W
A
I
I
M
D
Y
L
P
N
S
H
E
R
I
U
K
H
H
O
O
K
D
X
R
B
M
X
-
A
G
L
P
D
S
I
V
E
S
D
E
L
7
S
J
B
O
Y
T
L
D
F
A
E
E
R
R
E
I
R
R
A
B
T
U
A
O
N
E
T
R
B
G
U
I
J
I
F
Minute handHour hand
Button
B
D
A
C
T
E
Crown
K
U
H
P
Date indication
Button
A
Rotating bezel
Component identification
Indication
N
O
L
A
S
H
H
N
A
O
R
R
C
Y
N
A
I
I
A
N
R
E
F
O
A
M
-
X
R
S S
M
D
Y
N
E
D
O
D
N
O
I
R
E
M
T
W
T T
M F
ON
OFF
O
D
P
N
T
Reception-in-progress indication
RX-TME:
Reception-in-progress indication
RX-GPS:
OK/NO:
S/M/T/W/T/F/S:
Power reserve indication (in five levels)
ON/OFF:
(location information)
Reception result indication
Day-of-week indication
Summer time (DST) setting
DIVE:
Place name/time zone
(time)
Diving mode
S
O
G
A
P
A
L
A
G
N
E
D
L
A
X
A
N
C
H
A
W
• The illustrations in this instruction manual may differ from the actual appearance
of your watch.
• A solar cell is placed under the dial.
M
P
L
O
B
A
E
R
L
S
H
E
R
I
U
K
H
H
O
K
D
X
R
B
M
X
-
A
G
L
P
D
S
I
V
E
S
D
E
L
D
A
C
7
H
P
S
J
B
O
Y
T
L
D
F
A
E
E
R
R
E
I
R
R
A
B
T
U
A
O
N
E
R
G
U
I
J
I
F
T
E
K
U
17
2
W
Checking the power reserve and power generation amount
Always care about the current power reserve and charging environment of the
watch and charge it sufficiently.
Indication of power reserve in
levels
T T
M F
S S
ON
OFF
0
1
18
4
3
Function hand
E
M
T
-
X
R
T T
M F
S S
ON
OFF
N
W
Indication of power generation
0
1
O
O
K
R
X
-
G
P
S
7
5
6
amount in levels
2
3
4
Hour, minute and second
hands
Checki ng the power res erve and pow er generat ion amount
Make sure that the watch is not wet before operating it.
1
Push the crown in to position 0.
2
Press and release the upper right button B.
The power reserve and power generation amount at the
moment of pressing the button are indicated in level.
• Power reserve level (function hand): page
• Level of power generation amount (hour, minute and
second hands): page
3
Press and release the upper right button B to finish
22
the procedure.
The hands returns to current time indication.
• They return to current time indication automatically in
about 10 seconds.
20
19
Checki ng the power res erve and pow er generat ion amount
Indication of power reserve in levels
Level 4 3 2 1 0
Indication
Duration
Meaning
See “Indication of power reserve in levels” on page 18.
24 - 19
months
Power reser ve
is sufficient.
OK for normal use.
19 - 14
months
Power reser ve is OK.
14 - 5 months
5 months - 5
days
Power reser ve
is getting low.
Charge immediately.
5 days or
shorter
Insufficient
charge
warning has
started.
20
Checki ng the power res erve and pow er generat ion amount
CAUTION
• At the level 0, the second hand starts to move once every two seconds
(insufficient charge warning function, page
unavailable while this function is activated. For details, see page
• The function hand points to “OFF” and does not indicate the level of power
reserve when temperature of the watch is too high or too low.
(non-chargeable state)
Check it again at a location of suitable temperature.
). Some functions become
50
51
.
21
Checki ng the power res erve and pow er generat ion amount
Indication of power generation amount in levels
The level of power generation amount means power being generated by the solar
cell represented in 7 levels (0 - 6).
Level 6 5 4 3 2 1 0
Indication
Meaning
See “Indication of power generation amount in levels” on page 18.
Suff icient power
generation for
charging.
Charge in a brighter location where the level of
power generation amount reaches “5” or “6”.
22
Checki ng the power res erve and pow er generat ion amount
CAUTION
• The level of power generation amount indicated is that of the moment you
operate the watch for its indication. The level indication does not reflect change
of the level after your operation.
• The level may vary even under the same brightness due to the entry angle
of light to the dial of the watch or other elements. The level may also vary
depending on difference of models.
• The light level indication of “6”, indicates light being received is equivalent to a
cloudy outdoors (about 10,000 lux illuminance) or a brighter location.
• Use the level of power generation amount as a general reference only.
23
X
B
N
M
A
L
D
I
V
E
S
R
X
-
G
P
S
R
U
H
D
X
B
M
M
E
L
S
H
E
I
K
H
M
A
L
D
I
V
E
S
Checking the reception result of the satellite signal
Make sure that the watch is not wet before operating it.
1
Push the crown in to position 0.
2
Press and release the lower right button A.
The previous reception result is indicated.
OK
NO
• The indication shows the result of the last reception,
regardless types of received information, or information of
location or time.
24
N
O
L
A
S
H
H
N
A
O
R
R
M
O
P
L
A
E
D
R
L
P
F
A
S
H
E
R
I
U
K
H
H
O
O
K
N
O
D
N
O
I
A
R
N
R
E
O
E
M
T
-
X
R
D
R
X
-
G
P
S
N
O
L
A
S
H
H
N
A
O
R
R
O
P
N
L
A
D
R
E
P
D
O
O
K
N
Reception was successful.
Reception failed.
Checki ng the recepti on result of th e satellite s ignal
3
Press and release the lower right button A to finish
the procedure.
The hands returns to current time indication.
• They return to current time indication automatically in
about 10 seconds.
About the reception result
The previous reception result is stored for 6 days and “NO” is indicated after that.
25
Setting the world time
This watch can indicate the time around the world according to which of 38 time
zones (offsets from UTC — Coordinated Universal Time) is chosen.
You can set offsets from UTC through any of the two ways below.
How to set What to set
Obtaining location information
from satellite signals
Setting the time zone manually
• Summer time (DST) information is not contained in the satellite signal. Adjust
the setting manually before and after the summer time (DST) period. (page
26
A time zone is set automatically and time and calendar
are adjusted based on the chosen zone. (page
A time zone is chosen manua lly. (page 36)
34
)
)
44
Checking the current time zone setting
Make sure that the watch is not wet before operating it.
1
Pull the crown out to position 1.
The second hand indicates the current world time setting
and the function hand indicates the current summer time
(DST) setting.
• See also “How to read indication of the world time setting”
) and “Table of time zones and representative
(page
28
areas” (page
2
Push the crown in to position 0 to finish the
29
).
procedure.
The second hand returns to indicate the second.
Setti ng the world tim e
27
Setti ng the world tim e
N
O
O
K
R
X
-
G
P
S
P
A
R
R
U
H
D
X
B
D
E
L
P
D
L
E
N
O
R
O
N
H
A
L
O
N
S
H
A
R
M
E
L
S
H
E
I
K
H
M
A
L
D
I
V
E
S
How to read indication of the world time setting
The watch has 38 time zone markers with several representative area names. A time
zone is set by pointing the second hand at one of the markers.
W
T
Second
hand
T
F
B
U
Time zone marker
S
O
N
G
I
J
I
F
7
O
Y
T
L
D
F
A
E
E
R
R
E
I
R
R
A
B
T
U
A
E
R
On the illustration in the left, the second hand
points to 21 seconds and time zone setting is
D
A
“+9”.
C
T
• Time zones are represented by offsets from
E
K
U
H
UTC.
P
S
J
• Time zone markers and area names may
B
differ from the illustration in some models.
Representative area
28
Table of time zones and representative places
• Countries or regions may change time zones for various reasons.
• The offsets in the table are based on the standard time.
0
+1
+2
+3
+3.5
+4
+4.5
+5
Second
hand
0
2
SHARM EL SHEIKH/
4
6
7
8
9
10
Area name Representative area
LON
PAR
SSH
RUH
—
DXB
—
MALDIVES/
MLE
London
Paris
Sharm El Sheikh, Athens
Riyadh
Teh ra n
Dubai
Kabul
Maldives, Karachi
Time zone
Setti ng the world tim e
29
Setti ng the world tim e
Time zone
+5.5
+5.75
+6
+6.5
+7
+8
+8.75
+9
+9.5
+10
+10 . 5
30
Second
hand
12
13
14
15
16
18
20
21
23
25
26
Area name Representative area
DEL
—
DAC
—
PHUKET/HKT
BJS
—
TYO
ADL
GREAT BARRIER
REEF/—
—
Delhi
Kathmandu
Dhaka
Yan gon
Phuket, Bangkok
Beijing/Hong Kong
Eucla
Tokyo
Adelaide
Great Barrier Reef, Sydney
Lord Howe Island
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