Seiko N855 User manual

INSTRUCTION MANUAL
N855
Bluetooth Link Watch

1
※
Length adjustment service for metallic bands is available
at the retailer from whom the watch was purchased. If you
cannot have your watch repaired by the retailer from whom
the watch was purchased because you received the watch as
a gift or you moved to a distant place, please contact SEIKO
CUSTOMER SERVICE CENTER.
The service may also be available on a chargeable basis at
other retailers, however, some retailers may not undertake
the service.
※
If your watch has a protective lm for preventing scratches,
make sure to peel it off before using the watch. If the watch
is used with the lm on it, dirt, sweat, dust, or moisture may
be attached to the lm and may cause rust.
Thank you very much for choosing a SEIKO watch.
For proper and safe use of your SEIKO watch,
please read carefully the instructions in this
booklet before using it.
Keep this manual handy for easy reference.

22
CONTENTS
1. ABOUT THIS PRODUCT
Handling Precautions ………………………………………………… 3
About the Radio Act ………………………………………………… 5
About the Radio Act……………………………………………… 5
About Radio Frequency ………………………………………… 5
Cautions for Use of 2.4 GHz Equipment……………………… 5
Use of Bluetooth Communication Function of the Watch
outside Japan …………………………………………………… 5
About BluetoothⓇ…………………………………………………… 8
Specications of Bluetooth …………………………………… 8
Caution for Use of Bluetooth Connection …………………… 8
License andTrademark ………………………………………… 8
Features ………………………………………………………………… 9
Names of Parts ………………………………………………………… 9
Functions of Each Mode……………………………………………… 10
2.TIME SYNCHRONIZATION VIA BLUETOOTH COMMUNICATION
Registration of Watch ………………………………………………… 11
Precautions on UsingTime Synchronization Function
via Bluetooth Communication ………………………………… 11
Before Registering the Watch ………………………………… 11
To Start Registration …………………………………………… 11
How to ReceiveTime/Calendar Data ……………………………… 12
Automatic Reception ……………………………………………12
Manual Reception ………………………………………………12
Display of Reception Result ……………………………………13
3. MANUAL TIME ADJUSTMENT FUNCTION OFTIME MODE
How to AdjustTime Manually ……………………………………… 14
Operation Method ……………………………………………… 14
4. CALENDAR FUNCTION
How to Show Calendar Display ……………………………………15
Calendar Display …………………………………………………15
Operation Method ………………………………………………15
How to Adjust Calendar Manually ………………………………… 16
Operation Method ………………………………………………16
5. COUNT-UP TIMER
How to Use Count-UpTimer …………………………………………17
Operation Method ………………………………………………17
6. HAND POSITION ADJUSTMENT
How to Adjust Hand Position ……………………………………… 18
Operation Method ………………………………………………18
7.TO PRESERVE THE QUALITY OFYOUR WATCH
Daily Care ……………………………………………………………… 19
Performance andType ……………………………………………… 19
Water Resistance ………………………………………………………20
Band ……………………………………………………………………21
Remarks on Battery ……………………………………………………22
After-Sales Service ……………………………………………………23
8.TROUBLESHOOTING
Troubleshooting ………………………………………………………24
How to Reset Built-In IC (System Reset) …………………………27
Operation Method ………………………………………………27
9. SPECIFICATIONS
Specications …………………………………………………………28

3
1. ABOUT THIS PRODUCT
Handling Precautions (1)
To indicate the risks of serious consequences such as
severe injuries unless the following safety regulations
are strictly observed.
・Immediately stop wearing the watch in the following cases.
 ○If the watch body or band becomes edged by corrosion, etc.
○If the pins protrude from the band
※Immediately consult the retailer from whom the watch was
purchased or SEIKO CUSTOMER SERVICE CENTER.
・
Keep the watch and accessories out of the reach of babies and children.
 
Care should be taken to prevent a baby or a child from accidentally
swallowing accessories.
If a baby or a child swallows the battery or accessories, immediately
consult a doctor as it will be harmful to the health of the baby or child.
・Do not remove the battery from the watch.
Replacement of the battery requires professional knowledge and
skill. For battery replacement, please ask the retailer from whom
the watch was purchased .
Do not charge the battery.
It may explode, generate heat or catch re.
CAUTION
To indicate the risks of light injuries or material damage
unless the following safety regulations are strictly observed.
・Avoid wearing or storing the watch in the following places.
 ○
Places where volatile agents (such as polish remover, bug
repellent, thinners, etc.) are vaporizing
○Places where the temperature drops below 5 ℃or rises above 35
℃for a long time
○Places of high humidity ○
Places affected by strong magnetism
or static electricity
○
Dusty places ○Places affected by strong vibrations
※Do not leave the old battery inside the watch for a long time.
Battery leakage may occur.
・If you observe any allergic symptoms or skin irritation,
Stop wearing the watch immediately and consult a specialist
such as a dermatologist or an allergist.
・Other cautions
○ Replacement of the metal band requires professional
knowledge and skill. Please ask the retailer from whom the
watch was purchased for replacement of the metal band, as
there is a risk of hand or nger injury and fear of losing parts.
○ Do not disassemble or tamper with the watch.
○ Keep the watch out of the reach of babies and children. Extra
care should be taken to avoid risks of any injury or allergic rash
or itching that may be caused when they touch the watch.
○When disposing of used batteries, follow the instructions of
your local authorities.
○ If your watch is of the fob or pendant type, the strap or chain
attached to the watch may damage your clothes, or injure the
hand, neck, or other parts of your body.
WARNING

4
1. ABOUT THIS PRODUCT
Handling Precautions (2)
Do not use the watch for scuba diving or saturation diving.
The various tightened inspections under simulated
harsh environment, which are usually required for
watches designed for scuba diving or saturation
diving, have not been conducted on this watch. For
diving, use special watches for diving.
The radio waves emitted from this product may have
a negative impact and cause an accident due to a
malfunction.
・Do not use this product near medical equipment.
The radio waves may affect pacemakers and
electric medical equipment . Do not use it in
crowded places such as packed trains, and inside
of medical institutions.
・
Do not use this product near automatic control devices
such as automatic doors and re alarm systems.
In the places where transmission of radio waves
is prohibited, such as in airplanes, turn off the
automatic reception function of the watch, and do
not perform manual reception.
The radio waves emitted from this product may
adversely affect other devices.
Do not push the buttons when the watch is wet.
Water may get inside of the watch.
※
If the inner surface of the glass is clouded with
condensation or water droplets appear inside of the
watch for a long time, the water resistant performance
of the watch is deteriorated. Immediately consult the
retailer from whom the watch was purchased or SEIKO
CUSTOMER SERVICE CENTER .
Do not leave moisture, sweat and dirt on the watch
for a long time.
Be aware of a risk that a water resistant watch may
lessen its water resistant performance because of
deterioration of the adhesive on the glass or gasket, or
the development of rust on stainless steel.
Do not wear the watch while taking a bath or a
sauna.
Steam, soap or some components of a hot spring
may accelerate the deterioration of water resistant
performance of the watch.
Do not pour running water directly from faucet onto
the watch.
The water pressure of tap water from a faucet is high
enough to degrade the water resistant performance of
a water resistant watch for everyday life.
WARNING CAUTION

5
1. ABOUT THIS PRODUCT
About the Radio Act (1)
This product is certified as a
low power data communication
system based on the Radio Act in
Japan.
It is not necessary to obtain a
license, etc., to use this product
in Japan.
It is illegal to disassemble and
modify this product.
■Cautions for Use of 2.4 GHz Equipment
The operation frequency of this product is 2.4 GHz band.
In this frequency band, besides industrial/scientic/medical equipment
such as microwave ovens, other similar radio stations, in-plant radio
stations for mobile object identication that require licenses used for
manufacturing lines, etc., of plants, specic low power radio stations
that do not require licenses, amateur radio stations, etc. (hereinafter
referred to as "other radio stations") are operated.
・Before using this product, make sure that "other radio stations" are
not operating nearby.
This radio product uses the
2.4 GHz band. As a modulation
method, the GFSK modulation
method is adopted, and the
interference distance is 10 m.
■About Radio frequency
The frequency used by this product may be used also by other
wireless equipment. To prevent radio wave interference with other
radio equipment, be careful about the following when using this
product.
■Use of Bluetooth Communication Function of
the Watch outside Japan
This watch connects with a smartphone using the Bluetooth wireless
technology to perform time synchronization. To use its Bluetooth
function in countries or regions outside Japan, the watch must be
certied by the radio law thereof. Use of the function in a country or
region where such certication has not been obtained may subject the
user to punishment.
Use of the Bluetooth function of the watch other than the following
countries and regions may be illegal (as of November 2019).
Japan, U. S. A., Canada, Australia, New Zealand, Korea, Belgium,
Bulgaria, Czech, Denmark, Germany, Estonia, Ireland, Greece,
Spain, France, Croatia, Italy, Cyprus, Latvia, Lithuania, Luxembourg,
Hungary, Malta, the Netherlands, Austria, Poland, Portugal,
Rumania, Slovenia, Slovakia, Finland, Sweden, U. K., Turkey,
Norway, Iceland, Liechtenstein, Hong Kong, Macau, Ecuador,
Colombia, Vietnam, and Peru
When the watch is used in countries or regions other than those
above, turn off the automatic reception function, and refrain from
using the manual reception function.
For details, visit our website: https://www.seikowatches.com/jp-ja/
customerservice/bluetooth
■About the Radio Act
(
N85
)
001 - A 15298
[Certication No.]
・If radio wave interference occurs between this product and "other
radio stations", change the location in which this product is used or
stop using this product (stop emitting radio waves) immediately.
・If you have any questions or troubles, please contact the SEIKO
CUSTOMER SERVICE CENTER.

6
1. ABOUT THIS PRODUCT
About the Radio Act (2)
REGULATORY COMPLIANCE/ CONFORMITÉ RÉGLEMENTAIRE/ 규정 준수
● USA
FCC Notice
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
FCC Caution
Changes or modications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
This transmitter must not be co-located or operated in conjunction
with any other antenna or transmitter.
● Canada
IC Notice
This device complies with Industry Canada's applicable licence-
exempt RSSs. Operation is subject to the following two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference
that may cause undesired operation of the device.
IC Avis
Le présent appareil est conforme aux CNR d'Industrie Canada
applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes:
(1) l'appareil ne doit pas produire de brouillage;
(2) l'utilisateur de l'appareil doit accepter tout brouillage
radioélectrique subi, même si le brouillage est susceptible d'en
compromettre le fonctionnement.
● EU
This product is in compliance with the essential
requirements and other relevant provisions of the
RE Directive (2014/53/EU) & RoHS Directive (2011/65/
EU).
https://www.seikowatches.com/global-en/products/
declaration-conformity
● 대한민국
・등록번호 :R-C-skW-N851
・신청자 :SEIKOWATCHCORPORATION
・제조자 :SEIKOWATCHCORPORATION
・제품명 :Bluetoothwatch
・모델명 :N851,N855
・제조년월 :구입처에문의해주십시오
・제조국 :중국
● Australia
● New Zealand
R - NZ

7
1. ABOUT THIS PRODUCT
About the Radio Act (3)
REGULATORY COMPLIANCE FOR USA/CANADA
Caution:The user is cautioned that changes or modications not expressly
approved by the party responsible for compliance could void
the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules and Industry Canada
licence-exempt RSS standard(s). Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables
aux appareils radio exempts de licence. L'exploitation est autorisée aux
deux conditions suivantes:
(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique
subi, même si le brouillage est susceptible d'en compromettre le
fonctionnement.
NOTE: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the FCC
Rules.These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipmentgenerates,usesandcanradiateradiofrequencyenergy
and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur
in a particular installation.
If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
・Reorient or relocate the receiving antenna.
・Increase the separation between the equipment and receiver.
・Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
・Consult the dealer or an experienced radio/TV technician for
help.
FCC & IC Radiation Exposure Statement:
This equipment complies with FCC and Canada radiation exposure limits
set forth for an uncontrolled environment.
This transmitter must not be co-located or operating in conjunction with
any other antenna or transmitter.
Déclaration d'IC sur l'exposition aux radiations:
Cet équipement est conforme aux limites d'exposition aux radiations
dénies par le Canada pour des environnements non contrôlés.
Cet émetteur ne doit pas être installé au même endroit ni utilisé avec
une autre antenne ou un autre émetteur.

8
1. ABOUT THIS PRODUCT
About BluetoothⓇ
■Specications of Bluetooth
・
Communication method: Bluetooth Standard Ver. 5.0
・
Frequency band used: 2.4 GHz band (2,402 to 2,480 MHz)
・
Modulation method: GFSK (1 MHz)
■Caution for Use of Bluetooth Connection
・The range in which the Bluetooth connection of this product is
possible varies depending on obstacles (human bodies, metal,
walls, etc.) and the surrounding radio wave state.
Under the following conditions, the Bluetooth connection may take
a long time or a connection error may occur.
Places where a wireless LAN exists;
Around microwave ovens in use; and
When other products with a communication function are used.
In such cases, data sending/receiving may fail, however, it is not a
malfunction.
Use the product in other environment.
・The radio waves emitted by this product may affect operations of
electronic medical equipment, etc.
In some cases, this may lead to serious accidents. Therefore, avoid
Bluetooth connections in the following places:
Hospitals; near priority seats in trains; airplanes; places such as
gas stations where flammable gas is generated; near automatic
doors; and re alarm systems.
・
Note that we are not liable for any information leakage that may
occur with the Bluetooth connection.
■License and Trademark
BluetoothⓇis a trademark or registered trademark of Bluetooth SIG,
Inc.
Seiko Watch Corporation uses this logo mark under license.

9
1. ABOUT THIS PRODUCT
Features
Your watch is a Bluetooth®Link Watch that corrects the time
automatically by connecting with a smartphone using the dedicated
application Time Connect※ .
To transmit data between the watch and the smartphone, make sure
that the smartphone is installed with Time Connect.
In addition to the time display function, the watch is equipped with
perpetual calendar and count-up timer functions.
■
Time Synchronization via Bluetooth Communication
Time data is transmitted between the watch and the dedicated
application via Bluetooth communication to correct the time/calendar
of the watch. The data can be received either automatically or
manually as required by operating the button or the rotary switch.
The watch indicates whether the reception has succeeded or failed.
■Mode Change with Rotary Switch
Mode change can be made easily by turning the rotating bezel. You
can see at a glance which mode is currently in use.
■Perpetual Calendar
Month and date are indicated by the hands. The calendar adjusts
automatically for odd and even months including February of leap
years up to February 28, 2100.
■Count-Up Timer

Up to 12 hours can be measured. When the time measured reaches
12 hours, the timer stops counting automatically.
■Battery Life Indicator
When the battery nears its end, the second hand starts moving at 2-second
intervals to warn that it needs to be replaced with a new one immediately.
※Time Connect supports the following OSs (as of November 2019).
・
iOS 11 or later ・ Android Ver. 7 or later
For the latest information on the supported OS, please visit our website below:
https://www.seikowatches.com/jp-ja/customerservice/bluetooth
Names of Parts
●Rotary Switch
・
To change the mode, turn the rotating bezel to align the mode
indicator on the rotating bezel with the desired mode name
(CONNECT,TIME or COUNT-UP) on the xed bezel.
・
The rotating bezel can be turned either clockwise or counterclockwise
between CONNECT and COUNT-UP.
※The markings on the bezels and the design of the watch may
differ from model to model.
Second hand
Minute hand
Hour hand
Mode indicator
Mode name:
COUNT-UP
TIME
CONNECT
Rotating bezel
Reception result
(Y, N)
Button Ⓐ
Button Ⓑ
Date scale
Fixed bezel
【CAUTION】
If sand or dirt enters the clearance between the rotating bezel and the
watch case, the rotating bezel may not turn smoothly. If the watch is
soiled with such foreign matter, rinse it off completely in a container
of tap water.

10
1. ABOUT THIS PRODUCT
Functions of Each Mode
●To change mode, turn the rotating bezel to align the mode indicator with a desired mode nameon the xed bezel.
COUNT-UP mode
■Measurement of elapsed time with count-up timer (P. 1 7 )
■Time display
■Calendar display (P. 1 5 )
■Display of reception result (P. 1 3 )
■
Manual time synchronization via Bluetooth communication (P. 1 2 )
■Time setting with watch buttons (P. 1 4 )
■Calendar setting with watch buttons (P. 1 6 )
■Hand position adjustment with watch buttons (P. 1 8 )
■ Time display
■ Calendar display (P. 1 5 )
■ Display of reception result (P. 1 3 )
■Automatic time synchronization via Bluetooth communication
(P. 1 2 )
■ 
Manual time synchronization via Bluetooth communication (P. 1 2 )
■ Calendar setting with watch buttons (P. 1 6 )
TIME mode
CONNECT mode
Mode indicator
COUNT-UP
Mode indicator
TIME
CONNECT
Mode indicator

11
2. TIME SYNCHRONIZATION VIA BLUETOOTH COMMUNICATION
Registration of Watch
■Precautions on Using Time Synchronization
Function via Bluetooth Communication
When using the time synchronization function via Bluetooth
communication, please observe the following:
CAUTION
●Before using the watch with a smartphone for therst time, be sure
to register it to the dedicated application. Registration procedure is no
longer required for Bluetooth communication thereafter.
■Before Registering the Watch
●For the information on downloading and installation of the
dedicated application "Time Connect," refer to the "Application
Operating Guide for N8 Series Watches".
（https://www.seikowatches.com/jp-ja/customerservice/bluetooth)
1. Enable the Bluetooth function on the smartphone.
※The method of enabling the Bluetooth function differs
depending on the model of the smartphone. For details, please
refer to the instruction manual for your smartphone.
2. Start up the dedicated application "Time Connect."
While registering the watch, make sure that the application screen
is kept displayed on the smartphone.
■To Start Registration
①
Turn the rotating bezel to align the mode indicator with
"CONNECT," or press and hold the button at the 3 o’clock position
for more than 2 seconds while the time is displayed in TIME or
CONNECT mode.The second hand points to the 3 o’clock position.
※By turning the rotating bezel to change the mode to CONNECT
from any other mode, the communication starts automatically.
②
Check that the registration of the watch is completed successfully.
When the watch connects with the application of the smartphone,
"Watch registered" is shown on the application screen, indicating
that the watch has been successfully registered to the application.
[ Change the mode to CONNECT
from any other mode. ]
[ Press and hold Button Ⓑfor
more than 2 seconds ]
Button Ⓑ
Each time the watch is used with a new smartphone, be sure to
install the dedicated application on the smartphone, and follow the
procedure in “Registration of Watch” above.
Press and
hold for
more than
2 seconds
※ Keep the dedicated application running at all times.
※ Keep your smartphone within 3 meters from the watch.
※ In the places where use of radio waves is prohibited, such as in
airplanes and hospitals, turn off the automatic reception function
of the watch, and do not perform manual reception.
※ Your watch is compliant with or certified by the radio law of
various countries and regions. Use of it in areas other than those
may be illegal and subject you to punishment. (Refer to P. 5 .)
or

12
2. TIME SYNCHRONIZATION VIA BLUETOOTH COMMUNICATION
How to ReceiveTime/Calendar Data (1)
■Manual Reception

●The manual reception can be
performed in two ways:
[ 1 ] Turn the rotating bezel to change the mode to CONNECT
from
any other mode. The second hand points to the 3 o'clock
position as the communication starts.
※
The watch automatically receives the time data once in 24 hours
at the same time of day when the time synchronization was
performed previously.
※
If the time of automatic reception comes while the calendar is
displayed (see P. 15), the display returns to the time, and then, the
data transmission starts. If it comes while the calendar is adjusted
manually (see P. 16), the automatic reception is performed after
the manual adjustment is completed.
※
If the rotating bezel is turned while the communication is in
process, it is discontinued.
※
While the watch is on standby for automatic reception in
CONNECT mode, the current time is displayed.
■Automatic Reception

Turn the rotating bezel to align the mode indicator with "CONNECT,"
and keep the watch in the CONNECT mode.
Rotating bezel
"CONNECT"
Mode indicator
Rotating bezel
Mode indicator
"CONNECT" Second hand
[ 2 ] While the time is displayed in
CONNECT or TIME mode, press
and hold Button Ⓑfor more than 2 seconds. The second
hand points to the 3 o'clock position as the communication
starts.
[ CONNECT mode ]
[ CONNECT mode ] [TIME mode ]
"CONNECT"
Second hand Second hand
"TIME"
Button Ⓑ
Press and
hold for
more than
2 seconds
Button Ⓑ
Press and
hold for
more than
2 seconds

13
2. TIME SYNCHRONIZATION VIA BLUETOOTH COMMUNICATION
■Display of Reception Result
●
After the communication was performed either automatically or
manually, the second hand indicates the reception result for 5 seconds.
[ When the reception was successful ]
When the data was received normally, the second hand points "Y"
at the 2 o'clock position.
Second hand
"Y"
Second hand
"N"
●Press Button Ⓐwhile the time is displayed in CONNECT or TIME
mode. The second hand points to "Y" or "N" to indicate the result
of the last reception performed in the past 24 hours.
Button Ⓐ
[ When the reception failed ]
When the data reception failed, the second hand points "N" at the 4
o'clock position.
[ CONNECT mode ] [TIME mode ]
"CONNECT" "TIME"
If the reception failed, check the following before performing manual
reception again:
・Is the smartphone kept within 3 meters from the watch?
・Is the dedicated application on the smartphone kept running?
・Is the watch registered to the dedicated application, and is the
application congured properly?
Button Ⓐ
How to ReceiveTime/Calendar Data (2)
※ If no reception succeeded or no communication was performed
in the past 24 hours, the second hand points to "N."

14
3. MANUAL TIME ADJUSTMENT FUNCTION OF TIME MODE
How to Adjust Time Manually
●
If the time synchronization function of the watch via the Bluetooth communication cannot be used for some reason, such as you do not have the
smartphone at hand, or it runs out of battery, it is possible to adjust the time manually inTIME mode using the watch alone.
[ Time display in TIME mode ]
"TIME"
Button Ⓐ
Press and hold
Button Ⓐ
Button Ⓑ
Press to set
minute hand
Press to set
hour hand
Second hand points to 11 o'clock position in AM period
Second hand points to 1 o'clock position in PM period
■Operation Method
①Turn the rotating bezel to align the mode indicator with "TIME" to
change the mode to TIME.
② Press and hold Button Ⓐfor more than 2 seconds to activate the
manual time setting function.
The minute hand moves to the "0 second" position of the minute
next to the one currently displayed, and the second hand points
to the 11 or 1 o'clock position. Then, the minute hand moves to
indicate that it is ready for setting.
※The second hand points to the 11 or 1 o'clock position depending
on whether the time is in the AM or PM period, respectively.
[ Ex.) If the time is 10:08 PM when the time setting function is activated ]
By pressing and holding Button Ⓐfor more than 2 seconds, the
hour and minute hands move to the positions indicating "10:09
oo," and the second hand points to the 1 o'clock position.
③Press Button Ⓑ to set the minute hand.
※
With each press of Button Ⓑ, the minute hand advances 1
minute. It moves quickly if the button is kept pressed.
④After the minute hand setting is completed, press Button Ⓐ.
The hour hand moves to indicate that it is ready for setting.
⑤Press Button Ⓑ
to set the hour hand.
※With each press of Button Ⓑ, the hour hand advances 1 hour. It
moves quickly if the button is kept pressed.
※
If the time period changes from AM to PM or vice versa by advancing
the hour and minute hands, the position the second hand points
to changes accordingly. The calendar display, however, will not
change even if the time is advanced from PM to AM period.To set the
calendar manually, use the calendar setting function (see P. 16).
⑥
After all the time setting procedure is completed, press Button Ⓐin
accordance with a time signal.The time setting function is deactivated,
and the display returns to the time as the second hand starts counting
exactly from "0" second. If the watch is left untouched for 3 minutes,
or if the rotating bezel is turned to change the mode to another, the
time setting function is also deactivated, and the time you have set is
registered.
Mode indicator
Button Ⓐor returns automatically in 3 minutes
Press and hold
for more than
2 seconds
Button Ⓐ
Button Ⓐ
Button Ⓐ
Button Ⓑ
[ Minute hand setting ] [ Hour hand setting ]

15
4. CALENDAR FUNCTION
How to Show Calendar Display
■Calendar Display
The month and date are indicated by the analogue three hands.
The watch is equipped with a perpetual calendar function
that adjusts automatically for odd and even months including
February of leap years up to February 28, 2100.
■Operation Method
①Check that the mode indicator is aligned with "TIME" or
"CONNECT," and the current time is displayed.
※If the mode is changed to “CONNECT” from another, the
current time is displayed after the time synchronization is
performed via Bluetooth communication (see P. 12). While the
communication is in process, the calendar will not be displayed
if the operation below is performed.
The illustration above refers to the case where the calendar is
displayed in TIME mode. The operation method and the calendar
display are the same in bothTIME and CONNECT modes.
Date scale
(on outer edge of dial)
Second hand
Indicating date
Ex.) 20th
Hour and minute hands
(aligned together)
Indicating month
Ex.) August (8)
②Press Button Ⓑ.
The hour and minute hands align together to indicate "month,"
while the second hand indicates "date." The calendar is
displayed for 10 seconds, and the display automatically returns
to the time.
Month: Read the hour marker that the hour and minute hands
point to.
Date: Read the date scale on the outer edge of the dial that
the second hand points to.
※Pressing Button
Ⓑwhile the calendar is displayed also returns
the display to the time.
"TIME"
Button Ⓑ
Mode indicator
Returns automatically
in 10 seconds
or
Button Ⓑ
Button Ⓑ
[ Time display in TIME mode ] [ Calendar display ]

16
4. CALENDAR FUNCTION
How to Adjust Calendar Manually
●Ex.) To set calendar to August 20, 2021
■Operation Method
①
Press Button Ⓑin TIME or CONNECT mode to display calendar.
(Refer to P. 1 5 "How to Show Calendar Display.")
②Press and hold Button Ⓐfor more than 2 seconds to activate the
calendar setting function.
The second and minute hands remain indicating "date" and "month,"
respectively, while the hour hand indicates the number of years elapsed
from the leap year ("1" in the example above). Then, the second hand
turns a full circle, indicating that it is ready for date setting.
③ Press Button Ⓑto advance the second hand to set the desired date.
※
With each press of Button
Ⓑ, the second hand advances 1 day. It
moves quickly if the button is kept pressed.
※
If the date is advanced from "31st" to "1st," the month will not
be advanced by one.
④After the date setting is completed, press Button Ⓐ.
The minute hand moves to indicate that it is ready for month setting.
⑤
Press Button Ⓑto advance the minute hand to set the desired month.
※With each press of Button
Ⓑ, the minute hand advances 1 month.
It moves quickly if the button is kept pressed.
※
If the month is advanced from "December (12)" to "January (1)," the
number of years elapsed from leap year will not be advanced by one.
⑥After the month setting is completed, press Button Ⓐ.
The hour hand moves to indicate that it is ready for leap year setting.
⑦
Press Button Ⓑto advance the hour hand to set the desired number
of years elapsed from leap year.
※
With each press of Button
Ⓑ, the hour hand advances one year.
It moves quickly if the button is kept pressed.
⑧
After the leap year setting is completed, press Button Ⓐ. The
calendar setting function is deactivated, and the display returns
to the calendar. If the watch is left untouched for 3 minutes, or if
the rotating bezel is turned to change the mode to another, the
calendar setting function is also deactivated, and the calendar
you have set is registered.
※
When the display returns to the calendar, it returns to the time
in 10 seconds. The display also returns to the time by pressing
Button Ⓑwhile the calendar is displayed.
Hour hand (number of years elapsed from leap year)
Ex.)
2019 : 3
2020 : 0
2021 : 1
2022 : 2
[ Calendar display ] [ Date setting ] [ Month setting ] [ Leap year setting ]
Button Ⓑ
Press to set
date
(1~31)
Button Ⓐ
Button Ⓐor returns automatically in 3 minutes
Press and
hold for
more than
2 seconds
Button Ⓐ
Button Ⓑ
Press and hold
Button Ⓐ
Second hand
Ex.) 20th
Hour and minute hands
Ex.) August (8)
Button ⒶButton Ⓐ
Button Ⓐ
Button Ⓑ
Button Ⓐ
Press to set
month
(1~12)
Press to set
number of
years from
leap year
(0~3)
●
If the time synchronization function of the watch via the Bluetooth communication cannot be used, it is possible to adjust the calendar manually using
the watch alone.

17
5. COUNT-UP TIMER
●
The count-up timer measures the elapsed time up to 12 hours. The hour, minute and second hands indicate "hour," "minutes" and "seconds" of the
elapsed time, respectively.
When 12 hours has elapsed, the count-up timer stops automatically.
How to Use Count-Up Timer
"COUNT-UP"
[ Auto-stop function]
With each press of
Button Ⓑ, the timer
stops and restarts
alternately.
■Operation Method
①Turn the rotating bezel to align the mode indicator with "COUNT-
UP."The count-up timer starts counting.
②By pressing Button Ⓑ while the measurement is in progress,
the measurement stops .
③By pressing Button Ⓑ while the measurement is stopped, the
measurement is restarted .
※
The measurement can be stopped and restarted as many times
as necessary by pressing Button Ⓑ.
※
When the time measured reaches 12 hours, the count-up
timer stops automatically (auto-stop function), and all the
three hands stop at the 12 o'clock position. To restart the
measurement, press Button Ⓑ.
④To reset the count-up timer, turn the rotating bezel to change the
mode to another. It is reset by doing so, irrespective of whether
the measurement is in progress or stopped.
[ Reset ]
Turn the rotating
bezel to change mode
to another while the
timer is measuring or
stopped.
The count-up timer stops measurement
automatically when the time measured
reaches 12 hours. To restart the
measurement, press Button Ⓑ.
To restart
measurement
To Start measurement
Button Ⓑ Button Ⓑ
[ Restart ][ Stop ][ Start of measurement ]
Mode
indicator
Button Ⓑ

18
6. HAND POSITION ADJUSTMENT
How to Adjust Hand Position
●In the following cases, the hand position data stored in the built-in IC and the positions the hands actually point to do not correspond with each other.
Follow the procedure below to adjust the hand position.
1)The hands do not point to the proper positions, being affected by strong shocks, magnetism, etc.;
2)The hands do not indicate the time properly after the time synchronization via Bluetooth communication; and
3) After Bluetooth communication, the second hand does not indicate the reception result, "Y" or "N," properly.
■Operation Method
①
Press and hold Button Ⓐfor more than 10 seconds in TIME mode.
The hand position adjustment function is activated, and all the hands
move toward the 12 o’clock position. Then, the second hand turns a
full circle to indicate that it is ready for hand position adjustment.
If any of the three hands do not point to the 12 o’clock position
exactly, follow the procedure below to set it to the 12 o’clock position.
※While Button Ⓐis kept pressed to activate the hand position
adjustment function, the minute hand setting display of the
manual time setting function appears temporarily. Be sure to
keep the button pressed for more than 10 second until all the
hands move toward the 12 o’clock position. (Refer to “How to
AdjustTime Manually” on P. 14.)
②Press Button Ⓑto set the second hand to the 12 o’clock position.
※
The second hand moves quickly if Button Ⓑis kept pressed.
③
After the second hand position adjustment is completed, press Button Ⓐ.
 The minute hand moves to indicate that it is ready for hand
position adjustment.
④Press Button Ⓑto set the minute hand to the 12 o’clock position.
※The minute hand moves quickly if Button Ⓑis kept pressed.
⑤ After the minute hand position adjustment is completed, press Button Ⓐ.
The hour hand moves to indicate that it is ready for hand position adjustment.
⑥Press Button Ⓑto set the hour hand to the 12 o’clock position.
※
The hour hand moves quickly if Button Ⓑis kept pressed.
⑦
After the hour hand position adjustment is completed, press Button
Ⓐ.
The hand position adjustment function is deactivated, and
the display returns to the time. If the watch is left untouched for
3 minutes, or if the rotating bezel is turned to change the mode to
another, the hand position adjustment function is also deactivated,
and the hand position you have set is registered.
[ Time display in TIME mode ]
"TIME"
Button Ⓐ
Press and hold
Button Ⓐ
Button Ⓑ
Press to set
hour hand
Mode
indicator
Press and
hold for
more than
10 seconds
[ Minute hand position
adjustment ]
[ Hour hand position
adjustment ]
[ Second hand position
adjustment ]
Button Ⓑ
Press to set
minute hand
Button Ⓐor returns automatically in 3 minutes
Button Ⓑ
Press to set
second hand
Button Ⓐ
Button Ⓐ
Button Ⓐ
Button ⒶButton Ⓐ

19
7. TO PRESERVE THE QUALITY OFYOUR WATCH
Water resistant
performance
Refer to P. 2 0 .
N855-00A0
Daily Care
●The watch requires good daily care.
・Wipe away moisture, sweat or dirt with a soft cloth.
・After soaking the watch in seawater, be sure to wash the watch in
clean pure water and wipe it dry carefully.
 ※ If your watch is rated as "Non-water resistant" or "water resistant
for everyday life," do not wash the watch. Do not pour running
water directly from faucet onto the watch. Put some water into a
bowl rst, and them soak the watch in the water to wash it.
→"Performance and Type" on P. 19
→"Water Resistance" on P. 2 0
Performance and Type
※The case back design differs from model to model, and the
case back illustrated above may not be the same as that of
your watch.
Caliber No.
The number to
identify the type of
your watch
The case back shows the caliber No. and performance of
your watch.