Casio 5371 User manual

MO1405-EA © 2014 CASIO COMPUTER CO., LTD.
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ENGLISH
Congratulations upon your selection of this CASIO watch.
Applications
The built-in sensors of this watch measure direction, barometric pressure, temperature and altitude.
Measured values are then shown on the display. Such features make this watch useful when hiking,
mountain climbing, or when engaging in other such outdoor activities.
Warning !
•The measurement functions built into this watch are not intended for taking measurements that
require professional or industrial precision. Values produced by this watch should be considered
as reasonable representations only.
• When engaging in mountain climbing or other activities in which losing your way can create a
dangerous or life-threatening situation, always use a second compass to confirm direction readings.
•Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss
suffered by you or any third party arising through the use of this product or its malfunction.
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Important!
•The watch’s Altimeter Mode calculates and displays relative altitude based on barometric pressure
readings produced by its pressure sensor. This means that readings taken at different times at the
same location may produce different altitude values due to changes in barometric pressure. Also note
that the value displayed by the watch may be different from the actual elevation and/or sea level
elevation indicated for the area where you are located.
•When using the altimeter of this watch for mountain climbing or other activities, it is highly
recommended that you check a map, local altitude indications, or some other source for your current
correct altitude and regularly calibrate the altimeter with the latest information. For more information,
see “To specify a reference altitude value” (page E-66).
•Whenever you use the digital compass of this watch for serious trekking, mountain climbing, or other
activities, be sure always to take along another compass to confirm readings. If the readings produced
by the digital compass of this watch are different from those of the other compass, perform bidirectional
calibration of the digital compass to ensure more accurate readings.
•Direction readings and digital compass calibration will not be possible if the watch is in the vicinity of a
permanent magnet (magnetic accessory, etc.), metal objects, high-voltage wires, aerial wires, or
electrical household appliances (TV, computer, cellphone, etc.)
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About This Manual
•Depending on the model of your watch, digital display text appears
either as dark figures on a light background, or light figures on a dark
background. All examples in this manual are shown using dark figures
on a light background.
•Button operations are indicated using the letters shown in the
illustration.
•Note that the product illustrations in this manual are intended for
reference only, and so the actual product may appear somewhat
different than depicted by an illustration.
Crown
Small hand Second Hand
Minute HandHour Hand
Crown
Small hand Second Hand
Minute HandHour Hand
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Using the Crown
This watch has a lock-type crown.
Important!
•You should keep the crown locked during normal daily use. Leaving the crown unlocked creates the
risk of unintended operations or even damage due to impact.
To lock the crown
1. Push the crown back in (see “To pull out, rotate, or push the crown in”
below).
•Note that attempting to lock the crown when it is not pushed in can
cause unexpected watch operation.
2. Rotate the crown so Mark 1 is aligned with Mark 2.
3. While pushing in on the crown (a), rotate it to the right (b) until it stops,
and align Mark 1 with Mark 3.
4. Gently pull on the crown to make sure it is securely locked and does
not come out.
To unlock the crown
Rotate the crown so Mark 1 aligns with Mark 2.
b
a
Mark 2
Mark 1
Mark 1
Mark 3
b
a
Mark 2
Mark 1
Mark 1
Mark 3
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To pull out, rotate, or push the crown in
Important!
•Before performing any of these operations, first unlock the crown.
The illustrations below show the different crown operations.
Pull out Rotate Push in
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High-speed Movement
You can use either of the crown operations described below to move watch hands or indicators at high
speed.
HS1: Can be used to move both hands and display indicators.
HS2: Can be used when setting the hour and minute manually to move the hands at high speed.
To start HS1 high-speed movement
While the crown is pulled out, rotate it rapidly three turns away from you (for
forward movement) or towards you (for reverse movement). High-speed
movement will continue even if you release the crown.
To start HS2 high-speed movement
While HS1 high-speed movement is in progress, again rotate the crown rapidly
three turns in the same direction as the current HS1 movement (away from you
for forward movement or towards you for reverse movement).
To stop high-speed movement
Rotate the crown in the direction that is opposite that of the current high-speed
movement or press any button.
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Note
•If you do not perform any operation for more than two minutes after pulling out the crown, the indicator
shown below will appear and crown operations will become disabled. If this happens, push the crown
back in and then pull it out again to re-enable crown operations.
•Even if the indicator shown below appears immediately after you pull out the crown, crown operations
are disabled. If this happens, push the crown back in and lock it.
1 second
•You can use high-speed movement in the following cases: when changing the time and/or date setting
in the Timekeeping Mode, Countdown Timer Mode, or Alarm Mode, or when performing magnetic
declination angle calibration, altitude calibration, barometric pressure calibration, or temperature
calibration operations.
Operation Guide 5371

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Things to check before using the watch
1. Check the battery power level.
In any mode, hold down Bfor at least two seconds. The battery power indicator will appear on the digital
display, and then the watch will enter the Timekeeping Mode.
The battery power level will be indicated as Hor Mon the left
side of the digital display.
Go to step 2.
Power is low. Charge the watch by placing it in a location
where it is exposed to light. For details, see “Charging the
Watch” (page E-14).
NO YES
YES
Does any one of the following conditions exist?
•Lflashing on the digital display.
•“CHARGE” is flashing on the display.
The watch is charged
sufficiently.
NEXT
Battery power
indicator
•When Lis flashing, the second hand will jump at two-second intervals.
•When CHARGE is flashing, all hands will move to and stop at 12 o’clock.
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2. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To configure Home City and summer time settings” (page E-34) to configure
your Home City and daylight saving time settings.
Important!
•Proper time calibration signal reception, and World Time Mode data depend on correct Home City,
time, and date settings in the Timekeeping Mode. Make sure you configure these settings correctly.
3. Set the current time.
•To set the time using a time calibration signal
See “To get ready for a receive operation” (page E-22).
•To set the time manually
See “Configuring Current Time and Date Settings Manually” (page E-36).
The watch is now ready for use.
•For details about the watch’s radio controlled timekeeping feature, see “Radio Controlled Atomic
Timekeeping” (page E-20).
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Contents
About This Manual …………………………………………………………………………………………… E-3
Using the Crown ……………………………………………………………………………………………… E-4
To lock the crown ……………………………………………………………………………………… E-4
To unlock the crown …………………………………………………………………………………… E-4
To pull out, rotate, or push the crown in……………………………………………………………… E-5
Things to check before using the watch ………………………………………………………………… E-8
Charging the Watch………………………………………………………………………………………… E-14
To recover from the sleep state …………………………………………………………………… E-19
Radio Controlled Atomic Timekeeping ………………………………………………………………… E-20
To get ready for a receive operation ……………………………………………………………… E-22
To perform manual receive ………………………………………………………………………… E-24
To check the latest signal reception results ……………………………………………………… E-26
To turn auto receive on or off ……………………………………………………………………… E-27
Mode Reference Guide …………………………………………………………………………………… E-29
Timekeeping ………………………………………………………………………………………………… E-33
Configuring Home City Settings ………………………………………………………………………… E-34
To configure Home City and summer time settings ……………………………………………… E-34
Configuring Current Time and Date Settings Manually……………………………………………… E-36
To change the current time and date settings manually ………………………………………… E-36
To switch between 12-hour and 24-hour timekeeping…………………………………………… E-38
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Hand Home Position Adjustment ……………………………………………………………………… E-39
To adjust home positions …………………………………………………………………………… E-39
Moving the Hands for Easy Viewing of the Digital Dials …………………………………………… E-40
To shift the hands and view digital info …………………………………………………………… E-40
Specifying Altitude, Barometric Pressure, and Temperature Units ……………………………… E-42
To specify altitude, barometric pressure, and temperature units ……………………………… E-42
Taking Barometric Pressure Readings ………………………………………………………………… E-43
To take barometric pressure readings …………………………………………………………… E-43
To show and hide barometric pressure differential ……………………………………………… E-45
To enable or disable the barometric pressure change indicator ……………………………… E-50
To calibrate the pressure sensor…………………………………………………………………… E-51
Taking Direction Readings ……………………………………………………………………………… E-53
To take a direction reading ………………………………………………………………………… E-53
To perform bidirectional calibration………………………………………………………………… E-57
To perform magnetic declination correction ……………………………………………………… E-58
Using the Altimeter Mode ………………………………………………………………………………… E-62
To specify the altitude reading interval …………………………………………………………… E-63
To take altitude readings …………………………………………………………………………… E-64
To specify a reference altitude value ……………………………………………………………… E-66
To specify the altitude differential measurement range ………………………………………… E-68
To use the altitude differential value ……………………………………………………………… E-69
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Taking Temperature Readings …………………………………………………………………………… E-73
To take temperature readings ……………………………………………………………………… E-73
To calibrate the temperature sensor ……………………………………………………………… E-75
Checking the Current Time in a Different Time Zone………………………………………………… E-76
To enter the World Time Mode …………………………………………………………………… E-76
To configure World Time City and summer time settings ……………………………………… E-77
To swap your Home City and World Time City…………………………………………………… E-79
To access the UTC (Universal Time Coordinated) time zone ………………………………… E-79
Checking the Tide Level and Moon Ages (Tide/Moon) ……………………………………………… E-80
To view the current tide level ……………………………………………………………………… E-80
To view a Moon age ………………………………………………………………………………… E-81
To view tide level and Moon age for a specific date and time ………………………………… E-82
To calibrate the high tide time ……………………………………………………………………… E-85
Using the Stopwatch ……………………………………………………………………………………… E-88
To enter the Stopwatch Mode ……………………………………………………………………… E-88
To perform an elapsed time operation …………………………………………………………… E-88
To pause at a split time……………………………………………………………………………… E-88
To measure two finishes …………………………………………………………………………… E-89
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Using the Countdown Timer ……………………………………………………………………………… E-90
To enter the Countdown Timer Mode……………………………………………………………… E-90
To specify the countdown start time ……………………………………………………………… E-90
To perform a countdown timer operation ………………………………………………………… E-91
To stop the alarm …………………………………………………………………………………… E-91
Using the Alarm …………………………………………………………………………………………… E-92
To enter the Alarm Mode …………………………………………………………………………… E-92
To set an alarm time ………………………………………………………………………………… E-93
To turn an alarm and the Hourly Time Signal on and off………………………………………… E-94
To stop the alarm …………………………………………………………………………………… E-94
To test the alarm …………………………………………………………………………………… E-94
Illumination ………………………………………………………………………………………………… E-95
To turn on illumination manually …………………………………………………………………… E-95
To change the illumination duration ……………………………………………………………… E-96
To enable or disable the auto light switch ………………………………………………………… E-97
Other Settings ……………………………………………………………………………………………… E-99
To turn the button operation tone on or off ……………………………………………………… E-99
To turn Power Saving on or off …………………………………………………………………… E-99
Troubleshooting …………………………………………………………………………………………… E-100
Specifications ……………………………………………………………………………………………… E-108
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Charging the Watch
The face of the watch is a solar panel that generates power from light. The generated power charges a
built-in rechargeable battery, which powers watch operations. The watch charges whenever it is exposed
to light.
Charging Guide
Whenever you are not wearing the
watch, leave it in a location where it
is exposed to light.
•Best charging performance is
achieved by exposing the watch to
the strongest light available.
When wearing the watch, make sure
that its face is not blocked from light
by the sleeve of your clothing.
•The watch may enter a sleep state
(page E-19) if its face is blocked
by your sleeve even only partially.
Warning!
Leaving the watch in bright light for charging can cause it to become quite hot.
Take care when handling the watch to avoid burn injury. The watch can become particularly hot
when exposed to the following conditions for long periods.
•On the dashboard of a car parked in direct sunlight
•Too close to an incandescent lamp
•Under direct sunlight
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Important!
•Allowing the watch to become very hot can cause its liquid crystal display to go blank (totally black or
totally white, depending on the watch model). The appearance of the LCD should become normal
again when the watch returns to a lower temperature.
•Turn on the watch’s Power Saving function (page E-19) and keep it in an area normally exposed to
bright light when storing it for long periods. This helps to ensure that power does not run down.
•Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is
blocked from exposure to light can cause power to run down. Expose the watch to bright light
whenever possible.
Power Levels
In any mode, hold down Bfor at least two seconds. The battery power indicator will appear on the digital
display, and then the watch will enter the Timekeeping Mode.
You can get an idea of the watch’s power level by observing the battery power indicator on the display.
Level Battery Power Indicator Function Status
1
(H) All functions enabled.
2
(M) All functions enabled.
Battery power
indicator
Battery power
indicator
Operation Guide 5371

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Level Battery Power Indicator Function Status
3
(L)
Functions below are disabled.
•Auto and manual receive
•Sensor operation
•Moon age
•Tide Graph, barometric pressure change
indicator
When the above functions are disabled,
the small hand stays at 9 o’clock.
•Illumination
•Beeper
Second hand jumps every two seconds.
4
( CHARGE )
All hands stopped at 12 o’clock.
All functions disabled.
5 – – –
All hands stopped at 12 o’clock.
All functions disabled and settings return
to their initial factory defaults.
•The flashing Lindicator at Level 3 (L) tells you that battery power is very low, and that exposure to
bright light for charging is required as soon as possible.
•Once the battery reaches Level 2 (M) after falling to Level 5, reconfigure the current time, date, and
other settings.
•Display indicators reappear as soon as the battery is charged from Level 5 to Level 2 (M).
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•Leaving the watch exposed to direct sunlight or some other very strong light source can cause the
battery power indicator to show a reading temporarily that is higher than the actual battery level. The
correct battery level should be indicated after a few minutes.
•The current time and all other settings return to their initial factory defaults whenever battery power
drops to Level 5 and when you have the battery replaced.
A dark environment while battery power is at Level 4 will cause the level to drop to Level 5. Expose the
watch to bright light whenever possible.
Low battery alert
When battery power reaches Level 3, the second hand of the watch will
jump at 2-second intervals in the Timekeeping Mode to let you know that
charging is required.
Power Recovery Mode
•Performing multiple sensor, illumination, or beeper operations during a short period may cause the
recovery indicator (RECOVER) to start flashing on the display. This indicates that the watch is in the
power recovery mode. Illumination, alarm, countdown timer alarm, hourly time signal, and sensor
operations will be disabled until battery power recovers.
•Battery power will recover in about 15 minutes. At this time, the recovery indicator (RECOVER) will stop
flashing. This indicates that the functions listed above are enabled again.
Jumps at two-second
intervals
Jumps at two-second
intervals
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•Frequent flashing of the recovery indicator (RECOVER) indicates that battery power is low. Expose the
watch to bright light as soon as possible.
•Even if battery power is at Level 1 (H) or Level 2 (M), the Digital Compass Mode, Barometer Mode,
Thermometer Mode or Altimeter Mode sensor may be disabled if there is not enough power available
to power it sufficiently. This is indicated when the recovery indicator (RECOVER) are flashing.
•Frequent flashing of the recovery indicator (RECOVER) probably means that remaining battery power
is low. Leave the watch in bright light to allow it to charge.
Charging Times
Exposure Level (Brightness)
Daily
Operation
*1
Level Change *2
Level 5 Level 4 Level 3 Level 2 Level 1
Outdoor sunlight (50,000 lux) 8 min. 3 hours 22 hours 6 hours
Sunlight through a window (10,000 lux) 30 min. 7 hours 82 hours 22 hours
Daylight through a window on a
cloudy day (5,000 lux) 48 min. 10 hours 133 hours 36 hours
Indoor fluorescent lighting (500 lux) 8 hours 118 hours – – – – – –
*1 Approximate amount of exposure time required each day to generate enough power for normal daily
operation.
*2 Approximate amount of exposure time (in hours) required to take power from one level to the next.
•The above exposure times all are for reference only. Actual exposure times depend on lighting
conditions.
•For details about the operating time and daily operating conditions, see the “Power Supply” section of
the Specifications (page E-111).
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Power Saving
When turned on, Power Saving enters a sleep state automatically whenever the watch is left for a certain
period in an area where it is dark. The table below shows how watch functions are affected by Power
Saving.
•For information about enabling and disabling power saving, see “To turn Power Saving on or off” (page
E-99).
•There actually are two sleep state levels: “display sleep” and “function sleep”.
Elapsed Time in Dark Hands and Display Operation
60 to 70 minutes (display sleep) Blank display, second hand
stopped.
Except for display and second hand, all
functions enabled.
6 or 7 days (function sleep) Blank display, all hands
stopped at 12 o’clock.
Except for timekeeping, all functions
disabled.
•The watch will not enter a sleep state between 6:00 a.m. and 9:59 p.m. If the watch is already in a sleep
state when 6:00 a.m. arrives, however, it will remain in the sleep state.
•The watch will not enter a sleep state while it is in the Stopwatch Mode or Countdown Timer Mode.
•The watch will not enter a sleep state while barometric pressure change indicator is enabled (page
E-50).
To recover from the sleep state
Move the watch to a well-lit area, press any button, or angle the watch towards your face for reading (page
E-96).
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Radio Controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly. However, when
using the watch outside of areas covered by time calibration signals, you will have to adjust the settings
manually as required. See “Configuring Current Time and Date Settings Manually” (page E-36) for more
information.
This section explains how the watch updates its time settings when the city code selected as the Home
City is in Japan, North America, Europe, or China, and is one that supports time calibration signal
reception.
If your Home City Code setting is this: The watch can receive the signal from the
transmitter located here:
LONDON (LON), PARIS (PAR), ATHENS (ATH) Anthorn (England), Mainflingen (Germany)
HONG KONG (HKG) Shangqiu City (China)
TOKYO (TYO) Fukushima, Fukuoka/Saga (Japan)
NEW YORK (NYC), CHICAGO (CHI), DENVER (DEN), LOS
ANGELES (LAX), ANCHORAGE (ANC), HONOLULU (HNL) Fort Collins, Colorado (United States)
Important!
•The areas covered by ANC and HNL are quite far from the calibration signal transmitters, so certain
conditions may cause reception problems.
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Approximate Reception Ranges
UK and German Signals
Anthorn
500 kilometers
1,500 kilometers
The Anthorn signal is
receivable within this area Mainflingen
North American Signal
Japanese Signals Chinese Signal
500 kilometers Changchun
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
1,500 kilometers
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
1,000 kilometers
For the Honolulu and Anchorage time zones, the
signal can be received when reception conditions
are favorable.
Fukuoka/Saga
500 kilometers
Fukushima
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•Even when the watch is within range of a transmitter, signal reception may be impossible due to the
effects of geographic contours, structures, weather, the time of year, the time of day, radio interference,
etc. The signal becomes weaker at distances of approximately 500 kilometers, which means that the
influence of the conditions listed above becomes even greater.
•Signal reception may not be possible at the distances noted below during certain times of the year or
day. Radio interference may also cause problems with reception.
Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles)
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)
Shangqiu (China) transmitter: 500 kilometers (310 miles)
•As of December 2013, China does not use Daylight Saving Time (DST). If China does go to the Daylight
Saving Time system in the future, some functions of this watch may no longer operate correctly.
To get ready for a receive operation
1. Confirm that the watch is in the Timekeeping Mode. If it isn’t, use Bto enter the Timekeeping Mode
(page E-31).
2. The antenna of this watch is located on its 12 o’clock side. Position the watch with 12 o’clock facing
towards a window as shown in the nearby illustration. Make sure there are no metal objects nearby.
•Signal reception normally is better at night.
•The receive operation takes from two to ten minutes, but
in some cases it can take as long as 20 minutes. Take
care that you do not perform any button operation or
move the watch during this time.
12 o’clock
or
12 o’clock
or
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•Signal reception may be difficult or even impossible under the conditions described below.
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport
Near
high-tension
power lines
Among or
behind
mountains
3. What you should do next depends on whether you are using auto receive or manual receive.
•Auto receive: Leave the watch over night in the location you selected in step 2. See “Auto Receive”
below for details.
•Manual receive: Perform the operation under “To perform manual receive” on page E-24.
Auto Receive
•With auto receive, the watch performs the receive operation each day automatically up to six times (up
to five times for the Chinese calibration signal) between the hours of midnight and 5 a.m. (according to
the Timekeeping Mode time). When any receive operation is successful, none of the other receive
operations for that day are performed.
•When a calibration time is reached, the watch will perform the receive operation only if it is in the
Timekeeping Mode. The receive operation is not performed if a calibration time is reached while you
are configuring settings.
Operation Guide 5371

E-24
•You can use the procedure under “To turn auto receive on or off” (page E-27) to enable or disable auto
receive.
To perform manual receive
1. Use Bto enter the Receive Mode (R/C) as shown on page E-30.
2. Hold down Afor at least two seconds until RC flashes and then RC!
appears on the digital display.
•A signal level indicator (L1,L2, or L3, see page E-25) will appear
on the display after reception starts. Do not allow the watch to
move and do not perform any button operation until GET or ERR
appears on the display.
•If the receive operation is successful, the reception date and time
appear on the display, along with the GET indicator.
•The watch will immediately return to the Timekeeping Mode if you
press any button, or if you do not perform any button operation for
about two or three minutes.
Receive successful
2 seconds
Receive failed
Receiving
Receiving indicator
Receiving
Receiving indicator
E-25
Signal Level Indicator
During calibration signal reception, the signal level indicator displays the
signal level as shown below.
Weak (Unstable) Strong (Stable)
The level indication will change in accordance with reception conditions
while reception is being performed.
As you watch the indicator, keep the watch in a location that best
maintains stable reception.
•Even under optimum reception conditions, it can take about 10
seconds for reception to stabilize.
•Note that weather, the time of day, surroundings, and other factors all
can affect reception.
E-26
To check the latest signal reception results
Enter the Receive Mode (page E-30).
•R/C will be displayed for about one second, and then the date (month and day) and the time of the
last signal reception will alternate on the digital display at two second intervals.
•Even if a signal receive operation is successful, RC will be displayed to the left of the date on the
digital display.
•Dashes (-.- - and - : - -) alternating in place of the date and time indicate there has been no
successful signal reception yet (since you purchased the watch or had its battery replaced).
2 seconds
•To return to the Timekeeping Mode, press B.
E-27
To turn auto receive on or off
1. Enter the Receive Mode (page E-30).
•R/C will be displayed for about one second, and then the date
(month and day) and the time of the last signal reception will
alternate on the digital display.
•Dashes (-.- - and - : - -) alternating in place of the date and time
indicate there has been no successful signal reception yet (since
you purchased the watch or had its battery replaced).
2. Pull out the crown. This will cause the current auto receive status (ON
or OFF) to flash on the digital display.
•The timekeeping (hour, minute, second) hands will move to 2
o’clock.
•Only AUTORC OFF is displayed for cities that do not support time
calibration signal reception. AUTORC ON is not displayed.
3. Rotate the crown to select either auto receive on (ON) or auto receive
off (OFF).
4. After the setting is the way you want, push the crown back in. This will
return to the screen that was displayed in step 1 of this procedure.
On/Off statusOn/Off status
E-28
Radio-controlled Atomic Timekeeping Precautions
•Strong electrostatic charge can result in the wrong time setting.
•The receive operation is disabled under any of the following conditions.
– While power is at Level 3 (L) or lower (page E-15)
– While the watch is in the power recovery mode (page E-17)
– When the watch is in the function sleep state (“Power Saving”, page E-19)
– While the crown is pulled out
– While barometric pressure change indicator is being measured
– While a countdown timer operation is in progress (page E-90)
•A receive operation is cancelled if an alarm sounds while it is being performed.
•The watch is designed to update the date and day of the week automatically for the period January 1,
2000 to December 31, 2099. Updating of the date by signal reception will no longer be performed
starting from January 1, 2100.
•Even if a receive operation is successful, certain conditions can cause the time setting to be off by up
to one second.
•If you are in an area where signal reception is not possible, the watch keeps time with the precision
noted in “Specifications”.
•The Home City setting reverts to the initial default of TYO (Tokyo) whenever the battery power level
drops to Level 5 or when you have the rechargeable battery replaced. If this happens, change the
Home City to the setting you want (page E-34).
E-29
Mode Reference Guide
Your watch has 11 “modes”. The mode you should select depends on what you want to do.
To do this: Enter this mode: See:
•View the current time and date in the Home City
•Configure Home City and daylight saving time (DST) settings
•Configure time and date settings manually
•Enable auto signal reception
Timekeeping Mode E-33
•View the barometric pressure at your current location
•View a graph of barometric pressure readings
• Enable alerts (display and beep) for noteworthy changes in barometric pressure
Barometer Mode E-43
Determine your current bearing or the direction angle from your current location
to a destination Digital Compass Mode E-53
•View the altitude at your current location
•Determine the altitude differential between two locations (reference point and
current location)
Altimeter Mode E-62
View the temperature at your current location Thermometer Mode E-73
View the current time in 29 cities (29 time zones) and UTC (Universal Coordinated
Time) time World Time Mode E-76
View the Tide Graph and Moon age for the currently specified date and time Tide/Moon Data Mode E-80
Use the stopwatch to measure elapsed time Stopwatch Mode E-88
Use the countdown timer Countdown Timer Mode E-90
Set an alarm time Alarm Mode E-92
•Perform a manual time calibration signal receive operation
•Check whether the last receive operation was successful
•Configure auto receive settings
Receive Mode E-20
E-30
Selecting a Mode
•The illustration below shows which buttons you need to press to navigate between modes.
•To return to the Timekeeping Mode from any other mode, hold down Bfor about two seconds.
Countdown
Timer Mode
Alarm Mode
Stopwatch Mode World Time
Mode
Receive Mode
Tide/Moon Data
Mode
Countdown
Timer Mode
Alarm Mode
Stopwatch Mode World Time
Mode
Receive Mode
Tide/Moon Data
Mode
E-31
Timekeeping Mode Digital Compass Mode
Altimeter Mode
Thermometer Mode
Barometer Mode
Sensor Modes
Timekeeping Mode Digital Compass Mode
Altimeter Mode
Thermometer Mode
Barometer Mode
Sensor Modes
•Use the button operations below to navigate between the Timekeeping Mode and sensor (Barometer,
Digital Compass, Altimeter, Thermometer) modes.
Operation Guide 5371

E-32
•When you go from the Timekeeping Mode to the sensor modes, the sensor mode that you last used
before returning to the Timekeeping Mode will be entered first.
•Whenever you enter a sensor mode, the watch will beep the number of times indicated by the numbers
in the figure above. This will let you know what sensor mode you are entering.
•To enter a sensor mode from the Tide/Moon Data, Stopwatch, Countdown Timer, Alarm, World Time, or
Receive Mode, first enter the Timekeeping Mode and then press the applicable button.
General Functions (All Modes)
The functions and operations described in this section can be used in all of the modes.
Auto Return Features
•The watch automatically returns to the Timekeeping Mode from other modes if the crown is not pulled
out and if no button operation is performed for a preset amount of time.
Mode Name Approximate Elapsed Time
Tide/Moon Data, Alarm, Receive 3 minutes
Barometer, Thermometer 1 hour
Digital Compass 1 minute
Altimeter 1 hour minimum
12 hours maximum
Initial Screens
When you enter the Alarm or World Time Mode, the data you were viewing when you last exited the mode
appears first.
E-33
Timekeeping
Use the Timekeeping Mode (TIME) to set and view the current time and date.
•Each press of Cin the Timekeeping Mode will change screen contents as shown below.
Day of the week,
month/day screen
Barometric pressure graph,
date (month/day) screen
Time (hour, minute,
second) screen
World Time screenMoon age screen
Barometric
pressure graph
Day of week
Hour : MinutesMoon age
Month Day
Hour : Minutes Second
Month Day
•Holding down Cfor at least two seconds while any screen is displayed will toggle the barometric
pressure change indicator between ON and OFF.
When ON, the barometric pressure graph is displayed along with the BARO indicator.
•For information about how to check for significant barometric pressure changes, refer to “Barometric
Pressure Change Indications” (page E-49).
E-34
Configuring Home City Settings
There are two Home City settings: actually selecting the Home City and selecting either standard time or
daylight saving time (DST).
To configure Home City and summer time settings
1. In the Timekeeping Mode, pull out the crown.
•CITY will flash on the digital display indicating that the Home City
setting can be changed.
2. Rotate the crown to move the second hand to the city code of the city
you want you use as your Home City.
•For details about city codes, see the “City Code Table” at the back
of this manual.
3. Press Bto display the DST setting screen.
4. Rotate the crown away from you to cycle through the DST settings as
shown below.
Auto DST (AUTO)DST off (OFF)DST on (ON)
•The displayed DST setting will not change if you rotate the crown
towards you.
•After you change the Home City and/or DST setting, the hour
and minute hands will automatically move to the appropriate time
setting. The time shown on the digital display will also change
accordingly.
City code
Second Hand
City code
Second Hand
E-35
•The Auto DST (AUTO) setting will be available only when a city code that supports time calibration
signal reception (page E-20) is selected as the Home City. While Auto DST is selected the DST
setting will be changed automatically in accordance with time calibration signal data.
•Note that you cannot switch between standard time and daylight saving time (DST) while UTC is
selected as your Home City.
5. After the settings are the way you want, push the crown back in.
•Daylight Saving Time is turned on when the DST indicator is on the display.
Note
•After you specify a city code, the watch will use UTC* offsets in the World Time Mode to calculate
the current time for other time zones based on the current time in your Home City.
* Coordinated Universal Time, the world-wide scientific standard of timekeeping.
The reference point for UTC is Greenwich, England.
•Selecting some city codes automatically makes it possible for the watch to receive the time
calibration signal for the corresponding area. See page E-20 for details.
E-36
Configuring Current Time and Date Settings Manually
You can configure current time and date settings manually when the watch is unable to receive a time
calibration signal.
To change the current time and date settings manually
1. In the Timekeeping Mode, pull out the crown. This will cause CITY to
flash on the digital display.
2. Press C.
•This will cause HOUR-MIN to flash on the digital display.
•The second hand will point to either A(a.m.) or P(p.m.)
•This is the time setting mode.
•In the following steps, each press of Bcycles between settings
as shown below.
Home City/DST
Hour, minute
Month, day
Hour
Year
City codeCity code
E-37
3. Rotate the crown to change the minute setting.
•You can also use HS1 and HS2 high-speed movement (page E-6) to move the hands forward or
back at high speed.
•The hour hand will move in accordance with minute hand movement.
To set the hour hand separately, go to step 4 of this procedure.
4. Press B.
•This will cause HOUR to flash on the digital display.
5. Rotate the crown to change the hour setting.
•You can also use HS1 and HS2 high-speed movement (page E-6) to move the hands forward or
back at high speed.
6. Press B.
•This causes the currently set year, month, and day to appear on
the digital display, with the year setting flashing.
7. Rotate the crown to adjust the year setting.
•You can also use HS1 high-speed movement (page E-6) to change
this setting.
8. Press B.
•This causes the currently set date (month, day) setting to flash on
the display.
9. Rotate the crown to adjust the month and day setting.
•You can also use HS1 high-speed movement (page E-6) to change this setting.
•Pressing Bwill return to the hour and minute setting screen.
10. After the settings are the way you want, push the crown back in.
•This will cause timekeeping to start from 0 seconds.
E-38
Note
•For information about selecting a Home City and configuring the DST setting, see “Configuring
Home City Settings” (page E-34).
•While 12-hour timekeeping is in use, P(p.m.) is displayed from noon to midnight (11:59 p.m.) A(a.m.)
is displayed from midnight to noon (11:59 a.m.) These indicators are not displayed while 24-hour
timekeeping (displays times from 00:00 to 23:59) is being used.
•The watch’s built-in full automatic calendar makes allowances for different month lengths and leap
years. Once you set the date, there should be no reason to change it except after you have the
watch’s rechargeable battery replaced or after power drops to Level 5 (page E-15).
•The day of the week changes automatically when the date changes.
•Refer to the pages shown below for more information on Timekeeping Mode settings.
- Button operation tone on/off: “To turn the button operation tone on or off” (page E-99)
- Illumination duration setting: “To change the illumination duration” (page E-96)
- Enabling and disabling power saving: “To turn Power Saving on or off” (page E-99)
To switch between 12-hour and 24-hour timekeeping
1. Pull out the crown.
2. Press Bfive times.
•This causes the current timekeeping setting (12H or 24H) to flash
on the digital display.
3. Rotate the crown to select either 12-hour (12H) or 24-hour (24H)
timekeeping.
4. After the setting is the way you want, push the crown back in.
E-39
Hand Home Position Adjustment
If the watch is exposed to strong magnetism or impact, its hands can go out of alignment with the time on
the digital display. This can result in incorrect time indication even though a time calibration signal is being
received. Your watch has an auto hand position correction feature that normally adjusts the hands. Should
you notice that the hand positions are not correct, perform the operation below to correct them manually.
To adjust home positions
1. In the Timekeeping Mode, pull out the crown.
2. Hold down Afor at least five seconds until HAND SET flashes and
then HAND ADJ appears on the digital display.
•This will start home position adjustment, which causes all of the
watch hands to move to 12 o’clock.
•After the hands stop moving, will appear on the digital
display.
Important!
•Before performing step 3, below, make sure that all hands have
returned to the 12 o’clock position. Pushing the crown back in
while any hand is not at the 12 o’clock position will not perform
home position adjustment.
3. Push the crown back in.
•This will cause all of the hands (small hand, hour hand, minute
hand, second hand) to return to their normal positions.
Note
After performing home position adjustment, enter the Timekeeping Mode and check to make sure that the
analog hands and the display indicate the same time. If they do not, perform home position adjustment
again.
Wait until all of the hands
move to 12 o'clock.
Wait until all of the hands
move to 12 o'clock.
Operation Guide 5371

E-40
Moving the Hands for Easy Viewing of the Digital Dials
You can use the procedure below to move the analog hands in order to view the dial and the digital
display better.
Note
•The analog hands will not move while battery power is low.
To shift the hands and view digital info
While holding down L, press B.
•This will cause the timekeeping (hours, minutes, seconds) hands to move to 2 o’clock.
•To return the hands to their normal positions, press A,B, or C.
E-41
Note
•The hands will also return to their normal positions if you do not perform any operation for about 10
seconds.
•If the hands have moved to 2 o’clock because you pulled out the crown,* they will return to their normal
positions when you push the crown back in.
In this case, the hands will return to normal timekeeping when you push the crown back in.
* The hands will not move to 2 o’clock if you pull out the crown while configuring the city code setting
(pages E-34, E-77) or the summer time setting (pages E-34, E-77), or while manually configuring
time and date settings (page E-36).
Auto Hand Shift
If the hour hand and/or minute hand is over the digital display when a displayed barometric pressure,
altitude, or temperature reading is updated, the hand(s) will shift automatically (to 4 o’clock or 8 o’clock)
and provide a better view of the information on the display.
The hands will return to their normal position after about three seconds.
E-42
Specifying Altitude, Barometric Pressure, and Temperature Units
Use the procedure below to specify the altitude, barometric pressure, and temperature units to be used in
the Altimeter Mode, Barometer Mode and the Thermometer Mode.
Important!
•When TYO (Tokyo) is selected as the Home City, the altitude unit is set automatically to meters (m), the
barometric pressure unit to hectopascals (hPa), and the temperature unit to Celsius (°C). These
settings cannot be changed.
To specify altitude, barometric pressure, and temperature units
1. Make sure the watch is in the mode for the type of unit you want to
specify (Altimeter, Barometer, or Thermometer Mode).
•For information about changing modes, see “Selecting a Mode”
(page E-30).
2. Pull out the crown.
•The timekeeping (hour, minute, second) hands will move to
2 o’clock.
3. Press Bas many times as necessary until UNIT appear on the digital
display.
•For altitude, press Bthree times. For barometric pressure and
temperature, press Bonce.
4. Rotate the crown to change the unit setting.
5. After the settings are the way you want, push the crown back in.
E-43
Taking Barometric Pressure Readings
This watch uses a pressure sensor to measure air pressure (barometric pressure).
To take barometric pressure readings
In the Timekeeping Mode or any sensor mode, press Aa number of
times until BARO (Barometer Mode) appears on the digital display.
•In a non-sensor mode, hold down Bfor about two seconds to enter
the Timekeeping Mode. Next, perform the above step.
•About one second after entering the Barometer Mode (BARO), the first
barometric pressure reading will be displayed.
•Readings are continuously taken for about one hour: every five
seconds for the first three minutes and then every two minutes for the
remainder of the hour.
•Pressing Cor L, or rotating the crown while a reading operation is in
progress will extend the operation for approximately one hour from
point the button was pressed or the crown was rotated.
•The watch will return to the Timekeeping Mode after the reading
operation is complete (about one hour).
•Pressing Bwhile a reading operation is in progress will stop the
operation and enter the Timekeeping Mode.
Barometric
pressure graph
Barometric
pressure
Barometric
pressure graph
Barometric
pressure
E-44
Note
•When you enter the Barometer Mode, the second hand may indicate seconds (of the current time) or
the barometric pressure differential (page E-45). The initial second hand function will be the same as
what was selected the last time you took a barometric pressure reading. To toggle between the two
second hand functions (indicating seconds or indicating the barometric pressure differential) press C.
Barometric Pressure
•Barometric pressure is displayed in units of 1 hPa (or 0.05 inHg).
• The displayed barometric pressure value changes to ---if a measured barometric pressure falls outside
the range of 260 hPa to 1,100 hPa (7.65 inHg to 32.45 inHg). The barometric pressure value will reappear
as soon as the measured barometric pressure is within the allowable range.
Display Units
You can select either hectopascals (hPa) or inchesHg (inHg) as the display unit for the measured
barometric pressure. See “To specify altitude, barometric pressure, and temperature units” (page E-42).
E-45
Checking Barometric Pressure Changes and Trends
Your watch provides the three methods below for checking barometric pressure changes and trends.
•Checking the latest change in barometric pressure (Barometric pressure differential pointer described
below)
•Checking barometric pressure changes for the past 20 hours (Barometric Pressure Graph, page E-47)
•Checking for significant barometric pressure changes (Barometric Pressure Change Indicator, page
E-49)
Barometric Pressure Differential Pointer
Your watch automatically takes barometric pressure measurements every two hours (at the 30 minute
mark of each even numbered hour), regardless of the mode it is in.
The second hand of the watch indicates the difference between the current barometric reading and
previous automatic reading, within the range of ±10hPa (1hPa unit). This keeps you informed about
current barometric pressure changes in your area.
To show and hide barometric pressure differential
1. In the Timekeeping Mode or any sensor mode, press Aa number of times until BARO (Barometer
Mode) appears on the digital display.
•In a non-sensor mode, hold down Bfor about two seconds to enter the Timekeeping Mode. Next,
perform the above step.
2. Press C.
Note
•Press Cto toggle the second hand between its two functions (indicating seconds or indicating the
barometric pressure differential).
E-46
Reading Barometric Pressure Differential Pointer
Pressure differential is indicated in the
range of ±10 hPa (0.3 inHg), in 1 hPa (0.03
inHg) units.
•The nearby screen shot, for example,
shows what the second hand would
indicate when the calculated pressure
differential is approximately – 5 hPa
(approximately – 0.15 inHg).
•The second hand will point to + OVER or
– UNDER if the barometric pressure
differential is outside the allowable range
of the scale.
•The second hand will move to 9 o’clock
if a sensor reading could not be taken
for some reason or if the reading is
outside the allowable range.
•Barometric pressure is calculated and
displayed using hPa as the standard.
The barometric pressure differential also
can be read in inHg units as shown in
the illustration (1 hPa =0.03 inHg).
Barometric
pressure
differential
pointer
inHg values
hPa values
Current pressure
greater than most
recent measured
pressure
Current pressure
less than most
recent measured
pressure
−0.15
−5
−10
−0.3
Barometric
pressure
differential
pointer
inHg values
hPa values
Current pressure
greater than most
recent measured
pressure
Current pressure
less than most
recent measured
pressure
−0.15
−5
−10
−0.3
E-47
Barometric Pressure Graph
Your watch automatically takes barometric pressure measurements every
two hours (at the 30 minute mark of each even numbered hour), regardless of
the mode it is in.
While the watch is in the Barometer Mode or Timekeeping Mode, the digital
display shows a graph of pressure change for the past 20 hours (10
readings). By monitoring these changes you can predict the weather with
reasonable accuracy.
•To display the barometric pressure graph in the Timekeeping Mode, press
Ca number of times to cycle through digital display screens until it
appears (page E-33).
Reading the Barometric Pressure Graph
The barometric pressure graph shows a chronological history of pressure readings.
•The vertical axis of the graph represents barometric pressure, with each
dot standing for the relative difference between its reading and that of the
dots next to it. Each dot represents 1 hPa.
•The latest automatic reading is indicated by the rightmost segment in the
graph.
The following shows how to interpret the data that appears on the barometric pressure graph.
Rising barometric pressure indicates that upcoming weather will improve.
Falling barometric pressure indicates that upcoming weather will deteriorate.
Barometric pressure
graph
Barometric pressure
graph
Barometric
pressure
Time
Barometric
pressure
Time
Operation Guide 5371

E-48
Note
•The barometric pressure graph is not displayed while the barometric pressure change indicator is
displayed.
•While the watch is in the Barometer Mode, the watch will update the display barometric pressure value
at regular intervals (every five seconds for the first three minutes and then every two minutes for the
remainder of the hour). Since the barometric pressure graph show automatic readings taken every two
hours, the graph is updated only at two-hour intervals.
•Large changes in barometric pressure may cause past readings to run off the
top or bottom of the graph display area.
•The following conditions cause the barometric pressure reading to be
skipped, with the corresponding point on the barometric pressure graph
being left blank.
– Barometric reading that is out of range (260 hPa to 1,100 hPa or 7.65 inHg to 32.45 inHg)
– Sensor malfunction
Not visible on
the display.
Not visible on
the display.
E-49
Barometric Pressure Change Indications
Whenever your watch detects a significant change in air pressure readings (due to sudden ascent or
descent, or to the passage of a low pressure or high pressure area), it beeps to let you know. Also, an
arrow flashes on the digital display and the small hand points to the arrow mark. All of this is intended to
let you know what a significant pressure change has occurred so you can take any action that might be
required.
The barometric pressure change indicator is displayed in the Barometer Mode and while the barometric
pressure graph is displayed in the Timekeeping Mode (page E-33).
•For example, you could enable the barometric pressure change indicator after arriving at a lodge or
campsite. Then, before setting out the following day, you could check for changes in barometric
pressure, which will give you some idea of upcoming weather conditions.
Reading the Barometric Pressure Change Indicator
Small Hand and Digital Display Meaning
Sudden fall in pressure.
Sudden rise in pressure.
Sustained rise in pressure, changing to a fall.
Sustained fall in pressure, changing to a rise.
•The barometric pressure change indicator is not displayed if there has been no noteworthy change in
barometric pressure. In such a case, the small hand is at 6 o’clock.
E-50
Important!
•To ensure proper results, take barometric readings under conditions where the altitude remains
constant.
•A change in altitude causes a change in barometric pressure. This means that correct barometric
pressure readings are not possible while you are changing altitudes. To avoid possible confusion, it is
probably best to disable the barometric pressure change indicator while you are on the move during
your climb.
To enable or disable the barometric pressure change indicator
In the Barometer Mode or the Timekeeping Mode, hold down Cfor at least two seconds until INFO
appears on the digital display, and the current indicator setting toggles between ON (enabled) and OFF
(disabled).
•The small hand acts as a barometric pressure change indicator while ON, and a Tide Graph while
OFF.
•BARO is shown on the digital display while the indicator is enabled.
•Note that barometric pressure change indicator display will turn off automatically 24 hours after
you turn it on or battery power goes low.
•Enabling or disabling the Barometric Pressure Change Indicator in the Barometer Mode will also
toggle the second hand function between Barometric Pressure Differential Pointer (Barometric
Pressure Change Indicator ON) and current second count indication (Barometric Pressure
Change Indicator OFF) (page E-45). After selecting the Barometric Pressure Change Indicator
setting you want, use Cto select the second hand function setting you want.
•Note that time calibration signal reception and power saving (page E-19) are disabled while
barometric pressure change indicator display is enabled.
•Note that barometric pressure change indicator display cannot be enabled while the watch’s
battery is low.
E-51
Pressure Sensor Calibration
The pressure sensor built into the watch are calibrated at the factory and normally require no further
adjustment. If you notice serious errors in the pressure readings produced by the watch, you can calibrate
the sensor to correct the errors.
Important!
•Incorrectly calibrating the barometric pressure sensor can result in incorrect readings. Before
performing the calibration procedure, compare the readings produced by the watch with those of
another reliable and accurate barometer.
To calibrate the pressure sensor
1. Take a reading with another measurement device to determine the
exact current barometric pressure.
2. Use Ato enter the Barometer Mode (BARO), as shown on page
E-31.
3. Pull out the crown. This will cause the current barometric pressure
reading value to flash on the digital display.
•The timekeeping (hour, minute, second) hands will move to 2
o’clock.
4. Rotate the crown to adjust the barometric pressure value.
•You can also use HS1 high-speed movement (page E-6) to change
this setting.
•The calibration unit is 1 hPa (0.05 inHg).
•To return the setting to OFF (uncalibrated), press Aand Cat the
same time.
5. After you complete calibration, push the crown back in.
E-52
Barometer Precautions
•The pressure sensor built into this watch measures changes in air pressure, which you can then apply
to your own weather predictions. It is not intended for use as a precision instrument in official weather
prediction or reporting applications.
•Extreme temperature changes can affect pressure sensor readings. Because of this, there may be
some error in the readings produced by the watch.
E-53
Taking Direction Readings
You can use the Digital Compass Mode to determine the direction of north, and to check your bearing to a
destination.
•For information about what you can do to improve digital compass reading accuracy, see “Calibrating
the Bearing Sensor” (page E-56) and “Digital Compass Precautions” (page E-60).
To take a direction reading
1. Place the watch on a flat surface. If you are wearing the watch, make sure that your wrist is horizontal
(in relation to the horizon).
2. Point the 12 o’clock position of the watch in the direction whose reading you want to take.
3. In the Timekeeping Mode or any sensor mode, press Aa number of times until COMP (Digital
Compass Mode) appears on the digital display.
•In a non-sensor mode, hold down Bfor about two seconds to enter the Timekeeping Mode. Next,
perform the above step.
•After you enter the Digital Compass Mode (COMP), the watch will start taking bearing readings.
•Starting a digital compass operation will cause the second hand to move momentarily to the
12 o’clock position. Following the digital compass operation, the second hand will point in the
direction of magnetic north. The bearing and direction angle will appear on the digital display.
E-54
315°
0°
Objective Bearing Indication
Meaning
N: North
E: East
W: West
S: South
Bearing to Objective:
Northwest
Bearing Angle
to Objective
North
Note
•After the initial reading is displayed, the watch will continue to take readings and display results
about every second for about the next 60 seconds.
•Pressing Cor L, or rotating the crown while a reading operation is in progress will extend the
operation for approximately 60 seconds from point the button was pressed or the crown was
rotated.
•The watch will return to the Timekeeping Mode about 60 seconds after the direction reading
operation is complete.
•Pressing Bwhile a reading operation is in progress will stop the operation and enter the
Timekeeping Mode.
E-55
Important!
•If the second hand does not point exactly at 12 o’clock after you perform step 3 above, perform the
operation under “Hand Home Position Adjustment” (page E-39) to adjust it.
•If the digital display contents start to flash after you perform a reading operation, it means that
abnormal magnetism has been detected. Move away from any potential source of strong magnetism
and try taking a reading again. If the problem occurs when you try again, continue to keep away from
the source of strong magnetism, perform bidirectional calibration, and then try taking a reading again.
For more information, refer to “To perform bidirectional calibration” (page E-57) and “Location” (page
E-60).
Digital Compass Readings
•After the first reading is obtained, the watch will continue to take digital compass readings automatically
each second for up to 60 seconds. After that, the reading operation will stop automatically.
•The auto light switch is disabled during the 60 seconds that digital compass readings are being taken.
•The margin of error for the angle value and the direction indicator is ±10 degrees while the watch is
horizontal (in relation to the horizon). If the indicated direction is northwest (NW) and 315 degrees, for
example, the actual direction can be anywhere from 305 to 325 degrees.
•Note that taking a direction reading while the watch is not horizontal (in relation to the horizon) can
result in large direction reading error.
• You can calibrate the bearing sensor if you suspect the direction reading is incorrect.
•Any ongoing direction reading operation is paused temporarily while the watch is performing an alert
operation (daily alarm, Hourly Time Signal, countdown timer alarm) or while illumination is turned on (by
pressing L). The direction reading operation resumes for its remaining duration after the operation
that caused it to pause is finished.
•See “Digital Compass Precautions” (page E-60) for important information about taking direction readings.
Operation Guide 5371

E-56
•The direction indicated by the Digital Compass is magnetic north.
You can use Magnetic Declination Correction to configure the watch to indicate true north, if you want.
For details, see “Magnetic Declination Correction” below, “To perform magnetic declination correction”
(page E-58), and “Magnetic North and True North” (page E-60).
Calibrating the Bearing Sensor
You should calibrate the bearing sensor whenever you feel that the direction readings being produced by
the watch are off. You can use any one of two different bearing sensor calibration methods: bidirectional
calibration or magnetic declination correction.
•Bidirectional Calibration
Bidirectional calibration calibrates the bearing sensor in relation to magnetic north. Use bidirectional
calibration when you want to take readings within an area exposed to magnetic force. This type of
calibration should be used if the watch becomes magnetized for any reason.
Important!
•To ensure correct direction readings by this watch, be sure to perform bidirectional calibration before
using it. The watch may produce incorrect direction readings if you do not perform bidirectional
calibration.
•Magnetic Declination Correction
With magnetic declination correction, you select a declination angle direction and input a magnetic
declination angle (difference between magnetic north and true north), which allows the watch to indicate
true north. You can perform this procedure when the magnetic declination angle is indicated on the map
you are using.
E-57
Precautions about bidirectional calibration
•You can use any two opposing directions for bidirectional calibration. You must, however, make sure
that they are 180 degrees opposite each other. Remember that if you perform the procedure
incorrectly, you will get wrong bearing sensor readings.
•Do not move the watch while calibration of either direction is in progress.
•You should perform bidirectional calibration in an environment that is the same as that where you plan
to be taking direction readings. If you plan to take direction readings in an open field, for example,
calibrate in an open field.
To perform bidirectional calibration
1. In the Digital Compass Mode, pull out the crown.
• This will cause 1to appear on the digital display, with up arrow ( )
fl a s h i n g .
•The timekeeping (hour, minute, second) hands will move to
2 o’clock.
2. While keeping the watch horizontal, press A.
•WAIT will be shown on the digital display while calibration is
in progress. OK,Turn180° will appear on the digital display if
calibration is successful, and then 2will appear.
•If ERR appears on the display, press Aagain to restart the
direction reading operation.
3. Rotate the watch 180 degrees.
E-58
4. Press Aagain to calibrate the second direction.
•WAIT is shown on the display while calibration is being performed.
When calibration is successful, the display will show OK and then change to the Digital Compass
Mode screen.
If ERR appears on the display, go back to step 1 of this procedure.
5. After calibration is complete, push the crown back in.
To perform magnetic declination correction
1. In the Digital Compass Mode, pull out the crown.
• This will cause 1to appear on the digital display, with up arrow ( )
fl a s h i n g .
•The timekeeping (hour, minute, second) hands will move to
2 o’clock.
2. Press B.
•This will cause DEC and the current magnetic declination setting
to appear on the digital display.
Magnetic declination angle
direction value (E, W)
Magnetic declination
angle value
Magnetic declination angle
direction value (E, W)
Magnetic declination
angle value
E-59
3. Rotate the crown to change the magnetic declination direction and angle setting as required.
North Setting Setting
Magnetic North 0°
True North
E 90° to W 90°
E: East declination (Magnetic north is east of true north.)
W: West declination (Magnetic north is west of true north.)
•Note that you can input the declination angle in whole degree units only, so you may need to round
off the value specified on the map. If your map indicates the declination angle as 7.4°, you should
input 7°. In the case of 7.6° input 8°, for 7.5° you can input 7° or 8°.
•You can also use HS1 high-speed movement (page E-6) to change this setting.
•You can return the setting to 0° by press Aand Cat the same time.
•The illustration, for example, shows the value you should input and the direction setting you should
select when the map shows a magnetic declination of 1° west.
4. After calibration is complete, push the crown back in.
Setting a map and finding your current location
Having an idea of your current location is important when mountain climbing or hiking. To do this, you
need to “set the map”, which means to align the map so the directions indicated on it are aligned with the
actual directions of your location. Basically what you are doing is aligning north on the map with north as
indicated by the watch.
•Note that map reading skills and experience are required to determine your current location and
destination on a map.
E-60
Digital Compass Precautions
Magnetic North and True North
The northerly direction can be expressed either as magnetic north or true
north, which are different from each other. Also, it is important to keep in mind
that magnetic north moves over time.
•Magnetic north is the north that is indicated by the needle of a compass.
•True north, which is the location of the North Pole of the Earth’s axis, is the
north that is normally indicated on maps.
•The difference between magnetic north and true north is called the
“declination”. The closer you get to the North Pole, the greater the
declination angle.
Location
•Taking a direction reading when you are near a source of strong magnetism can cause large errors in
readings. Because of this, you should avoid taking direction readings while in the vicinity of the
following types of objects: permanent magnets (magnetic necklaces, etc.), concentrations of metal
(metal doors, lockers, etc.), high tension wires, aerial wires, household appliances (TVs, personal
computers, washing machines, freezers, etc.).
•Accurate readings are also impossible indoors, especially inside ferroconcrete structures. This is
because the metal framework of such structures picks up magnetism from appliances, etc.
•Accurate direction readings are impossible while in a train, boat, air plane, etc.
True north
Earth
Magnetic north
True north
Earth
Magnetic north
E-61
Storage
•The precision of the bearing sensor may deteriorate if the watch becomes magnetized. Because of
this, you should store the watch away from magnets or any other sources of strong magnetism,
including: permanent magnets (magnetic necklaces, etc.), concentrations of metal (metal doors,
lockers, etc.), and household appliances (TVs, personal computers, washing machines, freezers, etc.).
•Whenever you suspect that the watch may have become magnetized, perform the procedure under “To
perform bidirectional calibration” (page E-57).
E-62
Using the Altimeter Mode
The watch takes altitude readings and displays results based on air pressure measurements taken by a
built-in pressure sensor.
•The displayed altitude reading is a relative altitude that is calculated based on measurement of
changes in barometric pressure by the watch’s pressure sensor. This means that barometric pressure
changes can cause readings taken at different times at the same location to be different. Also note that
the value displayed by the watch may be different from the actual elevation and/or sea level elevation
indicated for the area where you are located.
•When using the altimeter of this watch for mountain climbing or other activities, it is highly
recommended that you check a map, local altitude indications, or some other source for your current
correct altitude and regularly calibrate the altimeter with the latest information.
Important!
•See “To specify a reference altitude value” (page E-66) and “Altimeter Precautions” (page E-72) for
information about how to minimize differences between readings produced by the watch and values
provided by local altitude (elevation) indications.
Getting Ready
Before actually taking an altitude reading you need to select an altitude reading interval.
Selecting the Altimeter Measurement Time and Interval
You can either of the two settings described below.
0'05": Readings for about one hour: every second for the first three minutes, and then every five
seconds for the remainder of the hour
2'00": Readings for about 12 hours; every second for the first three minutes, and then every two
minutes for the remainder of the 12 hours
E-63
To specify the altitude reading interval
1. In the Timekeeping Mode or any sensor mode, press Aa number of
times until ALTI (Altimeter Mode) appears on the digital display.
•In a non-sensor mode, hold down Bfor about two seconds to
enter the Timekeeping Mode. Next, perform the above step.
2. Pull out the crown.
•This will cause the current altitude reading value to appear.
•The timekeeping (hour, minute, second) hands will move to 2
o’clock.
3. Press B.
•This will cause INT to appear on the digital display, along with the
flashing current reading interval setting.
4. Rotate the crown to select either five second (0'05) or two minutes
(2'00) as the interval setting.
5. After the setting is the way you want, push the crown back in to exit the
setting screen.
Taking Altitude Readings
Use the procedure below to take basic altitude readings.
•See “Using Reference Altitude Values” (page E-65) for information about how to make altimeter
readings more accurate.
•See “How does the altimeter work?” (page E-71) for information about how the watch measures altitude.
Operation Guide 5371

E-64
To take altitude readings
In the Timekeeping Mode or any sensor mode, press Aa number of
times until ALTI (Altimeter Mode) appears on the digital display.
•In a non-sensor mode, hold down Bfor about two seconds to enter
the Timekeeping Mode. Next, perform the above step.
•After you enter the Altimeter Mode (ALTI), the watch will start taking
altitude readings.
•The current altitude value is displayed in units of 1 meter (5 feet).
•For information about the measurement interval, see page E-62.
Note
•When you enter the Altimeter Mode, the second hand may indicate seconds (of the current time) or the
altitude differential (page E-67). The initial second hand function will be the same as what was selected
the last time you took an altitude reading. To toggle between the two second hand functions (indicating
seconds or indicating the altitude differential) press C.
•Pressing Cor L, or rotating the crown while a reading operation is in progress will extend the
operation for approximately one hour or 12 hours (depending on the current measurement time and
interval setting) from point the button was pressed or the crown was rotated.
•The watch will return to the Timekeeping Mode at the end of the applicable measurement time (one
hour or 12 hours).
•Pressing Bwhile a reading operation is in progress will stop the operation and return to the
Timekeeping Mode.
•The measurement range for altitude is –700 to 10,000 meters (–2,300 to 32,800 feet).
•The displayed altitude value changes to ----if an altitude reading falls outside the measurement
range. An altitude value will reappear as soon as the altitude reading is within the allowable range.
Altitude Tendency Graph
Altitude
Altitude Tendency Graph
Altitude
E-65
•You can change the unit for displayed altitude values to either meters (m) or feet (ft). See “To specify
altitude, barometric pressure, and temperature units” (page E-42).
•The altitude tendency graph shows changes in altitude over the past 6 readings while readings are
being taken.
50 meters
(10 meters for
each block )
6 readings
ago
Current
reading
Using Reference Altitude Values
To minimize the chance of reading error, you should update the reference altitude value before setting off
on a trek or any other activity where you plan to take altitude readings. While mountain climbing, it is
highly recommended that you check a map, local altitude indications, or some other source for your
current correct altitude and regularly update the reference altitude value with the latest information.
•Reading error can be caused by changes in barometric pressure, and by temperature changes due to
change in barometric pressure and/or elevation.
•Though altitude readings can be taken without setting a reference altitude, doing so may produce
readings that are very different from altitudes indicated by other altitude markers and indications.
•Before performing the procedure below, look up the altitude of your current location on a map, the
Internet, etc.
E-66
To specify a reference altitude value
1. In the Altimeter Mode, pull out the crown.
•This will cause the current altitude reading value to flash on the
digital display.
•The timekeeping (hour, minute, second) hands will move to 2
o’clock.
2. Rotate the crown to change the altitude value in one-meter (five-foot)
increments.
•You can also use HS1 high-speed movement (page E-6) to change
this setting.
•Change the reference altitude value to an accurate altitude reading
that you get from a map or other source.
•You can set the reference altitude value within the range of –3,000
to 10,000 meters (–9,840 to 32,800 feet).
•To return to the OFF setting so no reference altitude value is
applied to readings, press Aand Cat the same time.
3. After the setting is the way you want, push the crown back in to exit the
setting screen.
E-67
Advanced Altimeter Mode Operations
Use the information in this section to obtain more accurate altimeter readings, especially while mountain
climbing or trekking.
Using an Altitude Differential Value
If you specify an altitude differential start point, the second hand of the
watch will indicate the difference between the current altitude and the
altitude differential start point. The displayed altitude differential value is
updated each time the watch obtains a new altitude reading value.
•Depending on the currently selected display range, the allowable
range for the altitude differential value is 100 meters to –100 meters
(100 meters = 328 feet), or 1,000 meters to –1,000 meters (1,000
meters = 3,280 feet).
•If a reading value is outside the allowable range either + OVER or
– UNDER appears on the digital display (page E-70).
•The second hand will move to 9 o’clock if a sensor reading could not
be taken for some reason or if the reading is outside the allowable
range.
•See “Using the Altitude Differential Value While Mountain Climbing or
Hiking” (page E-68) for some real-life examples of how to use this
feature.
Altitude differentialAltitude differential
E-68
Specifying the Altitude Differential Measurement Range
You can use the procedure below to select either ±100 meters or ±1,000
meters as the altitude differential measurement range.
Relative Altitude Measurement Range Display Unit
±100 meters (±328 feet) 5 meters (16 feet)
±1,000 meters (±3,280 feet) 50 meters (164 feet)
To specify the altitude differential measurement range
1. In the Altimeter Mode, pull out the crown.
•This will cause the current altitude reading value to appear.
•The timekeeping (hour, minute, second) hands will move to 2
o’clock.
2. Press Btwice.
•This will cause DIFF to appear on the digital display, along with the
flashing current altitude differential measurement range setting.
3. Rotate the crown to select either 100 meters (100m) or 1,000 meters
(1000m) as the altitude differential measurement range.
4. After the setting is the way you want, push the crown back in to exit the
setting screen.
Using the Altitude Differential Value While Mountain Climbing or Hiking
After you specify the altitude differential start point while mountain climbing or hiking, you can easily
measure the change in the altitude between that point and other points along the way.
Altitude differential rangeAltitude differential range
E-69
To use the altitude differential value
1. Use the contour lines on your map to determine the difference in
altitude between your current location and your destination.
•Knowing the difference in altitude helps you determine your
current location and how much further you need to go to reach
your destination.
2. In the Altimeter Mode, hold down Cfor at least two seconds to specify
your current location as the altitude differential start point.
•DIFF RESET and then RESET will appear on the digital display,
and then the second hand will move to ±0 (±0m) to indicate the
altitude differential.
3. While comparing the altitude difference you determined on the map
and the watch’s altitude differential value, advance towards your
destination.
•If the map shows that the difference in altitude between your
location and your destination is +80 meters for example, you know
you will be nearing your destination when the displayed altitude
differential value shows +80 meters.
Current
location
Destination
altitude
Current
location
Destination
altitude
Altitude Differential (Reference
location, so ±0 m is indicated.)
Current altitude
Altitude Differential (Reference
location, so ±0 m is indicated.)
Current altitude
E-70
The altitude differential with the reference location is indicated by the second hand as shown in the nearby
illustration.
•When ±100m is selected for the altitude
differential measurement range, the
+ OVER indicator appears any time the
differential is greater than +100 meters
(+328 feet). The − UNDER indicator
appears any time the differential is
greater than −100 meters (−328 feet). If
either of these indicators appears,
change the range setting to ±1000m.
•When ±1000m is selected for the
altitude differential measurement range,
the + OVER indicator appears any time
the differential is greater than +1,000
meters (+3,280 feet). The − UNDER
indicator appears any time the
differential is greater than −1,000
meters (−3,280 feet).
•The second hand will move to 9 o’clock
if a reading is outside the altimeter
measurement range (−700 to +10,000
meters (–2,300 to 32,800 feet)), or if a
reading error occurs.
•To toggle between the altitude
differential and current time seconds
count on the digital display, press C.
Unit: 50m (164ft)
Unit:
Meters
Unit: 5m (16ft)
−500m (−1,640ft)
−50m (−164ft)
−100m (−328ft)
−1,000m (−3,280ft)
1,000m (3,280ft) 500m (1,640ft)
100m (328ft)
Example:
Altitude
differential
of −30
(300)
meters
Indication range:
±100 (1,000) meters
50m (164ft)
00
Unit: 50m (164ft)
Unit:
Meters
Unit: 5m (16ft)
−500m (−1,640ft)
−50m (−164ft)
−100m (−328ft)
−1,000m (−3,280ft)
1,000m (3,280ft) 500m (1,640ft)
100m (328ft)
Example:
Altitude
differential
of −30
(300)
meters
Indication range:
±100 (1,000) meters
50m (164ft)
00
E-71
How does the altimeter work?
Generally, air pressure decreases as altitude increases. This watch bases its altitude reading on
International Standard Atmosphere (ISA) values stipulated by the International Civil Aviation Organization
(ICAO). These values define relationships between altitude and air pressure.
•Note that the following conditions will prevent you from obtaining accurate readings:
When air pressure changes because of changes in the weather
Extreme temperature changes
When the watch itself is subjected to strong impact
There are two standard methods of expressing altitude: absolute altitude, which expresses an absolute
height above sea level, and relative altitude, which expresses the difference between the altitudes of two
different places. This watch expresses altitudes as relative altitude.
Height of building 130 m
(relative altitude)
Rooftop at an altitude of
230 m above sea level
(absolute altitude)
Sea Level
Regular calibration of the watch in accordance with values provided by local altitude (elevation) indications
is recommended before taking readings in order to maximize reading accuracy (page E-65).
Operation Guide 5371

E-72
Altimeter Precautions
•This watch estimates altitude based on air pressure. This means that altitude readings for the same
location may vary if air pressure changes.
•Do not use this watch for altitude reading or perform button operations while sky diving, hang gliding,
or paragliding, while riding a gyrocopter, glider, or any other aircraft, or while engaging in any other
activity where there is the chance of sudden altitude changes.
•Do not use this watch for measuring altitude in applications that demand professional or industrial level
precision.
•Remember that the air inside of a commercial aircraft is pressurized. Because of this, the readings
produced by this watch will not match the altitude readings announced or indicated by the flight crew.
The Effect of Temperature on Altitude Readings
For the more accurate altitude readings, leaving the watch on your wrist is recommended in order to
maintain the watch at a constant temperature.
•When taking altitude readings, keep the watch at as stable a temperature as possible. Changes in
temperature can affect altitude readings.
E-73
Taking Temperature Readings
This watch uses a temperature sensor to measure temperature.
To take temperature readings
In the Timekeeping Mode or any sensor mode, press Aa number of
times until TEMP (Thermometer Mode) appears on the digital display.
•In a non-sensor mode, hold down Bfor about two seconds to enter
the Timekeeping Mode. Next, perform the above step.
•About one second after entering the Thermometer Mode (TEMP), the
first temperature reading will be displayed.
•Readings are continuously taken for about one hour: every five
seconds for the first three minutes and then every two minutes for the
remainder of the hour.
•Pressing Cor L, or rotating the crown while a reading operation is in
progress will extend the operation for approximately one hour from
point the button was pressed or the crown was rotated.
•The watch will return to the Timekeeping Mode after the reading
operation is complete (about one hour).
•Pressing Bwhile a reading operation is in progress will stop the
operation and enter the Timekeeping Mode.
TemperatureTemperature
E-74
Temperature
•Temperature is displayed in units of 0.1°C (or 0.2°F).
•The displayed temperature value changes to - -.- °C (or °F) if a measured temperature falls outside the
range of –10.0°C to 60.0°C (14.0°F to 140.0°F). The temperature value will reappear as soon as the
measured temperature is within the allowable range.
Display Units
You can select Celsius (°C) or Fahrenheit (°F) as the display unit for the measured temperature value.
See “To specify altitude, barometric pressure, and temperature units” (page E-42).
Temperature Sensor Calibration
The temperature sensor built into the watch are calibrated at the factory and normally require no further
adjustment. If you notice serious errors in the temperature readings produced by the watch, you can
calibrate the sensor to correct the errors.
Important!
•Incorrectly calibrating the temperature sensor can result in incorrect readings.
Carefully read the following before doing anything.
–
Compare the readings produced by the watch with those of another reliable and accurate thermometer.
– If adjustment is required, remove the watch from your wrist and wait for 20 or 30 minutes to give the
temperature of the watch time to stabilize.
E-75
To calibrate the temperature sensor
1. Take a reading with another measurement device to determine the
exact current temperature.
2. Use Ato enter the Thermometer Mode (TEMP), as shown on page
E-31.
3. Pull out the crown. This will cause the current temperature reading
value to flash on the digital display.
•The timekeeping (hour, minute, second) hands will move to
2 o’clock.
4. Rotate the crown to adjust the temperature value.
•You can also use HS1 high-speed movement (page E-6) to change
this setting.
•The calibration unit is 0.1°C (0.2°F).
•To return the setting to OFF (uncalibrated), press Aand Cat the
same time.
5. After you complete calibration, push the crown back in.
Thermometer Precautions
•Temperature readings are affected by your body temperature, direct sunlight, and moisture. To achieve
a more accurate temperature reading, remove the watch from your wrist, place it in a well ventilated
location out of direct sunlight, and wipe all moisture from the case. It takes approximately 20 to 30
minutes for the case of the watch to reach the surrounding temperature.
E-76
Checking the Current Time in a Different Time Zone
You can use the World Time Mode to display the current time in any one for 29 time zones (29 cities)
around the world, and in the UTC (Universal Time Coordinated) time zone. The city that is currently
selected in the World Time Mode is called the “World Time City”.
•Your watch includes functions for quickly swapping your Home City and World Time City settings, and
for one-touch access to the UTC time zone.
To enter the World Time Mode
Use Bto select the World Time Mode (WT) as shown on page E-30.
This causes WT to appear on the digital display. After one second, the
hour and minute hands move to indicate the time in the current World
Time City. The second hand points to the currently selected World Time
City for three seconds, and then returns to indicating the seconds.
•The digital display shows the current time in the Home City.
•To check whether the indicated World Time City time is a.m. or p.m.,
press A. This will cause the second hand to move to A(a.m.) or P
(p.m.) The second hand will return to regular timekeeping after about
three seconds.
•Pressing Cwill cause the second hand to move to the currently
selected World Time City city code. The second hand will return to
regular timekeeping after about three seconds.
Currently selected
Word Time City
Current timekeeping
Mode time
Current time in the currently
selected World Time City
Currently selected
Word Time City
Current timekeeping
Mode time
Current time in the currently
selected World Time City
E-77
To configure World Time City and summer time settings
1. In the World Time Mode, pull out the crown.
•This will cause CITY to flash on the digital display.
•The currently selected World Time City will be indicated by the
second hand.
2. Rotate the crown to move the second hand to the City Code you want
to select.
•For details about city codes, see the “City Code Table” at the back
of this manual.
3. Press B.
•This will cause the current DST setting (DST ON or DST OFF) to
flash on the display.
4. Rotate the crown to select either on (DST ON) or off (DST OFF) for the
DST setting.
•DST is shown on the digital display while DST is turned on.
5. After the settings are the way you want, push the crown back in.
•Note that you cannot switch between standard time/daylight
saving time (DST) while UTC is selected as the World Time City.
•Note that the standard time/daylight saving time (DST) setting
affects only the currently selected time zone. Other time zones are
not affected.
DST indicatorDST indicator
E-78
Swapping the Home City and World Time City
You can use the procedure below to swap your World Time City (whose time is indicated by the hands)
with your Home Time City (whose time is indicated by the digital display).
This function comes in handy for those who often travel between two different time zones.
The following example shows what happens when the Home City and World Time City are swapped while
the Home City originally is TOKYO ( TYO ) and the World Time City is NEW YORK ( NYC ).
Home City World Time City
Before swapping
Tokyo
10:08 p.m
(Standard time)
New York
9:08 a.m.
(Daylight saving time)
After swapping
New York
9:08 a.m.
(Daylight saving time)
Tokyo
10:08 p.m.
(Standard time)
•You need to configure starting Home City and World Time City settings before performing the
procedure below.
Home City and summer time settings (page E-34)
World Time City and summer time settings (page E-77)
E-79
To swap your Home City and World Time City
In the World Time Mode, hold down Cfor at least three seconds.
•After CITY flashes on the digital display, the watch will swap the Home City and World Time City
settings and the second hand will move to the new World Time City. After that, the times indicated by
the hand and on the digital display will be swapped with each other.
•The second hand will return to regular timekeeping after about three seconds.
•In the above example, the hands show current time in Tokyo (TYO), while the digital display shows
the current time in New York (NYC).
World Time City
(TYO) time
Current World
Time City
New World Time City
To access the UTC (Universal Time Coordinated) time zone
In the World Time Mode, hold down Afor at least three seconds.
•After UTC flashes on the digital display, the second hand will move to
UTC. After that, the hour hand and minute hand will move to the
current time in the UTC zone.
•The second hand will return to regular timekeeping after about three
seconds.
Operation Guide 5371

E-80
Checking the Tide Level and Moon Ages (Tide/Moon)
You can use the watch to check the current tide level and Moon age.
•The above information is displayed for the currently selected Home Time City. You can also check
information for another city by changing to a different Home City (page E-34).
•Note that the tide and Moon information displayed by this watch is approximate and is intended as
general information only. Never try to use it for marine navigation or any other purposes requiring
accurate measurements.
Viewing the current tide level and Moon age
To view the current tide level
The small hand indicates the tide level in all modes.
•When the barometric pressure change indicator (page E-49) is
enabled (BARO displayed), the small hand acts as the barometric
pressure change indicator (lower half of the dial). You can disable the
barometric pressure change indicator (BARO not displayed) by
holding down Cfor at least of two seconds in the Timekeeping Mode
or Barometer Mode.
Tide (Tide Graph Hand)Tide (Tide Graph Hand)
E-81
Low tide High tide Low tide
•The tide in the Home City is indicated even while the watch is in the World Time Mode.
•If the Tide Graph hand indication is not correct, check the Timekeeping Mode time and date, and the
Home City settings. If this does not correct the problem, refer to “Calibrating the High Tide Time” (page
E-84).
To view a Moon age
In the Timekeeping Mode, press Cas many times as necessary to
display the Moon Age Screen.
•The Moon age is for noon on the current date, regardless of the
indicated time.
•Calculation error for the Moon age is ±1 day.
Today’s Moon ageToday’s Moon age
E-82
To view tide level and Moon age for a specific date and time
1. Use Bto enter the Tide/Moon Data Mode as shown on page E-30.
•This displays the Tide Screen, which displays information in the following sequence: TIDE ➝
Today’s date ➝6:00AM.
•Tide Graph hand indicates the tide at 6 a.m. for today.
Tide level at 6:00
a.m. for today
Tide Screen
•If you are using 12-hour timekeeping, the P(p.m.) and A(a.m.) indicators will also appear on the
display.
2. Use Ato specify the time you want.
•Each press of Aadvances the time by one hour, causing the Tide Graph hand to change
accordingly.
•Holding down Afor about two seconds scrolls the time at high speed.
You can use this screen to check the tide level at a specific time.
•To view tide level and Moon age information for another date, go to step 3 of this procedure. You
cannot change the date while the Tide Screen is displayed.
E-83
3. Press C.
•This displays the Moon Screen, which displays information in the following sequence: MOON ➝
Today’s Moon age.
•The Tide Graph hand moves to 9 o’clock.
Tide level at
10:00 a.m. for today
Tide level
not indicated
Today’s Moon age
Tide Screen Moon Screen
4. Use Ato specify the time you want.
•Pressing Acauses today’s date to appear on the digital display. Each press of Aadvances the
day by 1.
•Holding down Afor about two seconds scrolls at high speed.
•About two seconds after you display the desired date, the Moon age on that date appears.
•You can select any date between January 1, 2000 and December 31, 2099.
You can use this screen to check the Moon age on the specified date.
•To view the tide level for a specified date and time, go to step 5 of this procedure.
E-84
5. Press C.
•This returns to the Tide Screen, which displays information in the following sequence: TIDE ➝
Specified date ➝Specified time.
•The Tide Graph hand indicates the tide for the specified date and time.
You can use this screen to check tide level for a specified date and time.
Calibrating the High Tide Time
You obtain more accurate tide indications by the watch by calibrating its high tide time with information
you can find on the Internet or in a newspaper.
•Note that the high tide time differs according to your location and the current season.
•Use the Moon Screen to calibrate high tide times.
E-85
To calibrate the high tide time
1. In the Tide/Moon Data Mode, display the Moon Screen.
•If the Tide Screen is displayed, press Cto change to the Moon Screen, which shows information
in the following sequence: MOON ➝Moon age.
Today’s Moon age
Tide Screen Moon Screen
2. Use Ato specify the date you want.
•Pressing Acauses today’s date to appear on the digital display. Each press of Aadvances the
day by 1.
•Holding down Afor about two seconds scrolls at high speed.
•About two seconds after you display the desired date, the Moon age on that date appears.
•You can skip this step if you do not want to change the date setting.
E-86
3. Pull out the crown.
•This will cause the hour and minute digits of the high tide time to
fl a s h .
•The watch’s hour, minute, and second hands will move to 2 o’clock.
•If you are using 12-hour timekeeping, the P(p.m.) and A(a.m.)
indicators will also appear on the display.
4. Rotate the crown to change the minute setting.
•Hour setting will change in accordance with minute setting
changes. To set the hour hand separately, go to step 5 of this
procedure.
•You can also use HS1 high-speed movement (page E-6) to change
this setting.
•Any time during steps 4 through 6, you can discard your changes
and return to the high tide time for the date that was previously
selected by pressing Aand Cat the same time.
•If there are two high tides on a date, set the time of the first high
tide. The watch will automatically calculate the time of the second
one.
•If summer time is turned on for your Home Time (DST displayed),
you should also use summer time when setting the high tide time
(page E-34).
5. Press B.
6. Rotate the crown to change the hour setting.
•You can also use HS1 high-speed movement (page E-6) to change
this setting.
Hour : MinutesHour : Minutes
E-87
7. Push the crown back in.
•The Tide Screen reappears after calibration is complete.
•Performing the above procedure allows the Tide Graph hand to indicate more accurate tide
information.
•The Tide Graph and Moon Age information you can view in the Tide/Moon Data Mode changes in
accordance with the date you specify in step 2 of the above procedure. If you want to view Tide
Graph and Moon Age information for a particular date, to back to step 2 and specify the date.
•The calibration setting you make with this procedure is also applied to Tide Graph information
indicated in other modes besides the Tide/Moon Data Mode.
Operation Guide 5371

E-88
Using the Stopwatch
The stopwatch measures elapsed time, split times, and two finishes.
To enter the Stopwatch Mode
Use Bto select the Stopwatch Mode (STW) as shown on page E-30.
To perform an elapsed time operation
AAAAC
Start Stop (Resume) (Stop) Reset
To pause at a split time
ACCAC
Start Split
(SP appears on
the digital
display.)
Split release Stop Reset
Current time
Hours
Seconds
Minutes
1/100 secondCurrent time
Hours
Seconds
Minutes
1/100 second
E-89
To measure two finishes
ACA C C
Start Split
First runner finishes.
(SP appears on the
digital display.)
Display time of first
runner
Stop
Second runner
finishes.
Split release
Display time of
second runner
Reset
Note
•The Stopwatch Mode can indicate elapsed time up to 23 hours, 59 minutes, 59.99 seconds.
•Once started, stopwatch timing continues until you press Ato stop it, even if you exit the Stopwatch
Mode to another mode and even if timing reaches the stopwatch limit defined above.
•Exiting the Stopwatch Mode while a split time is frozen on the display clears the split time.
E-90
Using the Countdown Timer
The countdown timer can be configured to start at a preset time, and sound an alarm when the end of the
countdown is reached.
To enter the Countdown Timer Mode
Use Bto select the Countdown Timer Mode (TIMER) as shown on page E-30.
•About one second after TIMER appears on the display, the display will change to show the countdown
time hours.
To specify the countdown start time
1. In the Countdown Timer Mode, pull out the crown.
•This will cause the current start time minutes digits to flash on the
digital display.
•The timekeeping (hour, minute, second) hands will move to 2
o’clock.
2. Rotate the crown to adjust the minutes setting.
•You can also use HS1 high-speed movement (page E-6) to change
this setting.
•To set a starting countdown time of 60 minutes, set 00’00.
3. After the setting is the way you want, push the crown back in.
Countdown time
(Minutes, seconds)
Current time
Countdown time
(Minutes, seconds)
Current time
E-91
To perform a countdown timer operation
AAA A C
Start Stop (Resume) (Stop) Reset
•Before starting a countdown timer operation, check to make sure that a countdown operation is not in
progress (indicated by the seconds counting down). If it is, press Ato stop it and then Cto reset to
the countdown start time.
•An alarm sounds for ten seconds when the end of the countdown is reached. This alarm will sound in
all modes. The countdown time is reset to its starting value automatically when the alarm sounds.
•Pulling out the crown while a timer operation is in progress will stop the operation and reset the time to
the start time.
To stop the alarm
Press any button.
E-92
Using the Alarm
You can set five independent daily alarms. When an alarm is turned on, an alarm will sound for about 10
seconds each day when the time in the Timekeeping Mode reaches the preset alarm time. This is true
even if the watch is not in the Timekeeping Mode.
You can also turn on an Hourly Time Signal, which will cause the watch to beep twice every hour on the
hour.
To enter the Alarm Mode
Use
B
to select the Alarm Mode (ALARM) as shown on page E-30.
•About one second after ALARM appears on the display, the display will change to show an alarm
name (AL1 through AL5) or the SIG indicator. The alarm name indicates an alarm screen. SIG is
shown when the Hourly Time Signal screen is on the display.
•When you enter the Alarm Mode, the data you were viewing when you last exited the mode appears
first.
Alarm name (AL- or SIG)
Alarm time (Hour : Minutes)
Hourly Time Signal screen
Alarm 1 screen
E-93
To set an alarm time
1. In the Alarm Mode, use Ato scroll through the alarm screens until the
one whose time you want to set is displayed.
AL1 AL2 AL3
SIG* AL5 AL4
* There is no time setting for the hourly time signal.
2. Pull out the crown.
•This will cause the hour and minute digits of the alarm time to flash.
•The timekeeping (hour, minute, second) hands will move to 2 o’clock.
3. Rotate the crown to adjust the minute setting.
•You can also use HS1 high-speed movement (page E-6) to change this setting.
•Hour setting will change in accordance with minute setting changes. To change the hour setting
separately, go to step 4 of this procedure.
4. Press B.
5. Rotate the crown to adjust the hour setting.
•You can also use HS1 high-speed movement (page E-6) to change this setting.
•If you are using 12-hour timekeeping, the P(p.m.) and A(a.m.) indicators will also appear on the
display.
6. After the settings are the way you want, push the crown back in.
•Setting an alarm time causes that alarm to turn on automatically.
E-94
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use Ato select an alarm or the Hourly Time Signal.
2. When the alarm or the Hourly Time Signal you want is selected, press Cto turn it on and off.
• The alarm on indicator (when any alarm is on), and the Hourly Time Signal on indicator (when the Hourly
Time Signal is on) are shown on the display in all modes.
Hourly time signal on indicator
Alarm on indicator
To stop the alarm
Press any button.
To test the alarm
In the Alarm Mode, hold down Ato sound the alarm tone.
E-95
Illumination
The display of the watch is illuminated for easy reading in the dark.
The watch’s auto light switch turns on illumination automatically when you angle the watch towards your
face.
•The auto light switch must be turned on (page E-97) for it to operate.
To turn on illumination manually
Press Lin any mode to illuminate the display.
•You can use the procedure below to select either 1.5 seconds or three
seconds as the illumination duration. When you press L, the display
will remain illuminated for about 1.5 seconds or three seconds,
depending on the current illumination duration setting.
•The above operation turns on illumination regardless of the current
auto light switch setting.
•Illumination will turn off automatically if an alarm starts to sound or if
you perform a crown operation.
•Illumination will not turn on if a calibration signal receive operation or
hand movement operation is in progress. Also, illumination may not
turn on while a sensor is taking a reading.
Operation Guide 5371

E-96
To change the illumination duration
1. In the Timekeeping Mode, pull out the crown.
2. Press Bfour times. This will cause LIGHT to appear on the digital display, along with a flashing value
(1or 3) indicating the current illumination duration setting.
3. Rotate the crown to select either 1(1.5 seconds) or 3(three seconds) for the illumination duration.
4. After the setting is the way you want, push the crown back in.
About the Auto Light Switch
Turning on the auto light switch causes illumination to turn on,
whenever you position your wrist as described below in any mode.
Moving the watch to a position that is parallel to the ground and
then tilting it towards you more than 40 degrees causes
illumination to turn on.
Warning!
•Always make sure you are in a safe place whenever you are reading the display of the watch
using the auto light switch. Be especially careful when running or engaged in any other activity
that can result in accident or injury. Also take care that sudden illumination by the auto light
switch does not startle or distract others around you.
•When you are wearing the watch, make sure that its auto light switch is turned off before riding
on a bicycle or operating a motorcycle or any other motor vehicle. Sudden and unintended
operation of the auto light switch can create a distraction, which can result in a traffic accident
and serious personal injury.
More than
40°
Wear the watch on the
outside of your wrist
More than
40°
Wear the watch on the
outside of your wrist
E-97
Note
•This watch features a “Full Auto Light”, so the auto light switch operates only when available light is
below a certain level. It does not illuminate the display under bright light.
•The auto light switch is always disabled, regardless of its on/off setting, when any one of the following
conditions exists.
While the watch is in the Digital Compass Mode
While a receive operation is in progress
While a hand movement operation is in progress
•If you have Auto Light enabled, display illumination may be delayed if you angle the watch towards
your face while a barometric pressure, altitude, or temperature reading operation is being performed.
To enable or disable the auto light switch
1. In the Timekeeping Mode, pull out the crown.
2. Press Bthree times. This will cause AUTO to appear on the left of the
digital display, along with the flashing current auto light switch setting
(ON or OFF) on the right.
3. Rotate the crown to select either enabled (ON) or disabled (OFF) for
the auto light switch setting.
4. Push the crown back in.
•Auto Light is automatically disabled whenever battery power drops to
Level 4 (page E-15).
Auto light switch on
indicator
Auto light switch on
indicator
E-98
Illumination Precautions
•The LED that provides illumination loses power after very long use.
•Illumination may be hard to see when viewed under direct sunlight.
•Illumination turns off automatically whenever an alarm sounds.
•Frequent use of illumination runs down the battery.
Auto light switch precautions
•Wearing the watch on the inside of your wrist, movement of your arm, or vibration of your arm can
cause frequent activation of the auto light switch and illumination of the display. To avoid running down
the battery, turn off the auto light switch whenever engaging in activities that might cause frequent
illumination of the display.
•Note that wearing the watch under your sleeve while the auto light switch is turned on can cause
frequent illumination of the display and can run down the battery.
•Illumination may not turn on if the face of the watch is more than 15 degrees above
or below parallel. Make sure that the back of your hand is parallel to the ground.
•Illumination turns off after the preset illumination duration (page E-96), even if you
keep the watch pointed towards your face.
•Static electricity or magnetic force can interfere with proper operation of the auto
light switch. If illumination does not turn on, try moving the watch back to the
starting position (parallel with the ground) and then tilt it back towards your face
again. If this does not work, drop your arm all the way down so it hangs at your
side, and then bring it back up again.
•You may notice a very faint clicking sound coming from the watch when it is shaken
back and forth. This sound is caused by mechanical operation of the auto light
switch, and does not indicate a problem with the watch.
E-99
Other Settings
The button operation tone sounds any time you press one of the watch’s buttons. You can turn the button
operation tone on or off as desired.
•Even if you turn off the button operation tone, the alarm, Hourly Time Signal, barometric pressure
change indicator, and Countdown Timer Mode alarm all operate normally.
To turn the button operation tone on or off
1. In the Timekeeping Mode, pull out the crown.
2. Press Btwice. This will cause the current button operation tone
setting (KEY or MUTE) to flash on the digital display.
3. Rotate the crown to select either on (KEY ) or off (MUTE) for the
button operation tone setting.
4. Push the crown back in.
To turn Power Saving on or off
1. In the Timekeeping Mode, pull out the crown.
2. Press Bsix times. This will cause P.SAVE to appear on the digital
display, along with the flashing current Power Saving setting (ON or
OFF).
3. Rotate the crown to select either on (ON) or off (OFF) for the Power
Saving setting.
4. Push the crown back in.
E-100
Troubleshooting
Time Setting
See “Radio Controlled Atomic Timekeeping” (page E-20) for information about adjusting the time setting
according to a time calibration signal.
■ The current time setting is off by hours.
Your Home City setting may be wrong (page E-34). Check your Home City setting and correct it, if
necessary.
■ The current time setting is off by one hour.
If you are using the watch in an area where time calibration signal reception is possible, see “To configure
Home City and summer time settings” (page E-34).
If you are using in the watch in an area where time calibration signal reception is not possible, you may
need to change your Home City’s standard time/daylight saving time (DST) setting manually. Use the
procedure under “To change the current time and date settings manually” (page E-36) to change the
standard time/daylight saving time (DST) setting.
Altitude Readings
■ Altitude readings produce different results at the same location.
■ Readings produced by the watch are different from the elevation and/or sea level altitude
indications in my area. (Negative sea level altitude values are produced in a location where the
indicated elevation is a positive value.)
E-101
■ I can’t get correct altitude readings.
Relative altitude is calculated based on changes in barometric pressure measurement by its pressure
sensor. This means that barometric pressure changes can cause readings taken at different times at the
same location to be different. Also note that the value displayed by the watch may be different from the
actual elevation and/or sea level elevation indicated for the area where you are located.
When using the altimeter of this watch for mountain climbing or other activities, it is highly recommended
that you check a map, local altitude indications, or some other source for your current correct altitude and
regularly calibrate the altimeter with the latest information.
For more information, see “To specify a reference altitude value” (page E-66).
■ Following a relative altitude reading, the watch’s second hand points to 9 o’clock.
•The reading value is outside of the allowable measurement range.
Specify the reference altitude value so it is within the allowable measurement range (page E-66).
•This could indicate sensor error. If ERR (error) is on the digital display, refer to “Direction, Altitude,
Barometric Pressure, and Temperature Readings” page E-103) for more information.
Taking Direction Readings
■ Abnormal magnetism detection is indicated.
•Move away from any potential source of strong magnetism and try
taking a reading again.
•If abnormal magnetism is detected again when you retry, it could mean
that the watch itself has become magnetized. If this happens, continue
to keep away from the source of strong magnetism, perform
bidirectional calibration, and then try taking a reading again. For more
information, refer to “To perform bidirectional calibration” (page E-57)
and “Location” (page E-60).
E-102
■ ERR appears on the digital display during sensor reading operations.
There is something wrong with the sensor. This could be due to nearby strong magnetic force. Contact
your original retailer or CASIO service center See “Location” (page E-60).
■ ERR appears following bidirectional calibration.
If the screen displays hyphens (- - -) followed by the ERR (error) indicator, it could mean there is
something wrong with the sensor.
•Wait for about one second for the ERR indicator to disappear from the display, and then calibrate the
sensor again.
•If ERR continues to appear even after multiple attempts to calibrate, contact your original retailer or
CASIO service center.
■ The direction information indicated by the watch is different from that indicated by a backup
compass.
•Move away from and potential source of strong magnetism, perform bidirectional calibration, and then
try taking a reading again. For more information, refer to “To perform bidirectional calibration” (page
E-57) and “Location” (page E-60).
■ Direction readings produce different results at the same location.
•Move away from any potential source of strong magnetism and try taking a reading again. See
“Location” (page E-60).
■ I am having problems taking direction readings indoors.
•Move away from any potential source of strong magnetism and try taking a reading again. See
“Location” (page E-60).
Whenever you have a sensor malfunction, take the watch to your original retailer or nearest authorized
CASIO distributor as soon as possible.
E-103
Barometric Pressure Readings
■ Following a relative barometric pressure reading, the watch’s second hand points to 9 o’clock.
•The reading value is outside of the allowable measurement range. See page E-44.
Calibrate the pressure sensor (page E-51).
•There may be a problem with the sensor. If ERR (error) is on the digital display, refer to “Direction,
Altitude, Barometric Pressure, and Temperature Readings” for more information.
Direction, Altitude, Barometric Pressure, and Temperature Readings
■ ERR appears on the digital display during sensor reading operations.
This indicates that there is a problem with the sensor, making sensor readings impossible.
•If the error is indicated while a reading operation in progress, restart the operation. If ERR appears
again, it could mean there is something wrong with the sensor.
•If ERR appears frequently, it could mean that the sensor is faulty. Contact your original retailer or
CASIO service center
■ I can’t change the temperature, barometric pressure, and altitude display units.
When TYO (Tokyo) is selected as the Home City, the altitude unit is set automatically to meters (m), the
barometric pressure unit to hectopascals (hPa), and the temperature unit to Celsius (°C). These settings
cannot be changed.
World Time Mode
■ The time for my World Time City is off in the World Time Mode.
This could be due to incorrect switching between standard time and daylight saving time. See “To
configure World Time City and summer time settings” (page E-77) for more information.
Operation Guide 5371

E-104
Charging
■ The watch does not resume operation after I expose it to light.
This can happen after the power level drops to Level 5 (page E-15). Keep the watch exposed to light until
it recharges sufficiently.
■ RECOVER is flashing on the digital display.
The watch is in the charge recovery mode. Wait until the recovery process is complete (about 15 minutes).
The watch will recover more quickly if you place it in a brightly lit location.
Note
•Performing repeated illumination and/or sensor reading operations over a short time period can cause
a sudden drop in watch’s charge. This will cause the watch to enter the charge recover mode. The
watch is in the charge recovery mode when RECOVER is flashing on the digital display. The charge
recovery mode is the same as a low battery charge state, access to some functions is limited while the
watch charge is recovering. Normal operation will resume after recovery is complete. For more
information, refer to “Power Recovery Mode” (page E-17).
•A flashing CHARGE indicator means that the charge level of the watch has suddenly dropped.
Immediately expose the watch to light to charge it.
Time Calibration Signal
The information in this section applies only when LON,PAR,ATH,HKG,HNL,ANC,LAX,DEN,CHI,
NYC, or TYO is selected as the Home City. You need to adjust the current time manually when any other
city is selected as the Home City.
E-105
■ The display shows the ERR indicator when I check the result of the latest receive operation.
Possible Cause Remedy Page
•You are wearing or moving the
watch, or performing a button
operation during the signal
receive operation.
•The watch is in an area with
poor reception conditions.
Keep the watch in an area where reception conditions are good
while the signal receive operation is performed. E-22
You are in an area where signal
reception is not possible for
some reason.
See “Approximate Reception Ranges”. E-21
The calibration signal is not
being transmitted for some
reason.
•Check the website of the organization that maintains the time
calibration signal in your area for information about its down times.
•Try again later.
–
■ The current time setting changes after I set it manually.
You may have the watch configured for auto receive of the time calibration signal (page E-23), which will
cause the time to be adjusted automatically according to your currently selected Home City. If this results
in the wrong time setting, check your Home City setting and correct it, if necessary (page E-34).
E-106
■ The current time setting is off by one hour.
Possible Cause Remedy Page
Signal reception on a day for
switching between standard
time/daylight saving time (DST)
may have failed for some reason.
Perform the operation under “To get ready for a receive operation”.
The time setting will be adjusted automatically as soon as signal
reception is successful.
E-22
If you are unable to receive the time calibration signal, change the
standard time/daylight saving time (DST) setting manually. E-36
■ Auto receive is not performed or you cannot perform manual receive.
Possible Cause Remedy Page
The watch is not in the
Timekeeping Mode.
Auto receive is performed only while the watch is in the Timekeeping
Mode. Enter the Timekeeping Mode. E-31
Your Home City setting is wrong. Check your Home City setting and correct it, if necessary. E-34
There is not enough power for
signal reception. Expose the watch to light to charge it. E-14
E-107
■ Signal reception is being performed successfully, but the time and/or day is wrong.
Possible Cause Remedy Page
Your Home City setting is wrong. Check your Home City setting and correct it, if necessary. E-34
The DST setting may be
incorrect. Change the DST setting to Auto DST. E-34
Calibration signal interference
caused the time and/or date
setting to be adjusted
incorrectly.
Perform manual calibration signal receive. E-24
E-108
Specifications
Accuracy at normal temperature: ±15 seconds a month (with no signal calibration)
Digital Timekeeping: Hour, minutes, seconds, a.m. (A)/ p.m. (P), month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Five display formats (day of the week, month, day; barometric pressure change, month, day;
hour, minute, second; World Time hour, minute; Moon age); Home City code (can be assigned
one of 29 city codes +UTC); standard time / daylight saving time (summer time)
Analog Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds
Time Calibration Signal Reception: Auto receive 6 times a day (5 times a day for the Chinese calibration
signal) ; Remaining auto receives cancelled as soon as one is successful; Manual receive;
Receive Mode
Receivable Time Calibration Signals: Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5
kHz); Anthorn, England (Call Sign: MSF, Frequency: 60.0 kHz); Fort Collins, Colorado, the
United States (Call Sign: WWVB, Frequency: 60.0 kHz); Fukushima, Japan (Call Sign: JJY,
Frequency: 40.0 kHz); Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60.0 kHz) ; Shangqiu
City, Henan Province, China (Call Sign: BPC, Frequency: 68.5 kHz)
Barometer:
Measurement and display range:
260 to 1,100 hPa (or 7.65 to 32.45 inHg)
Display unit: 1 hPa (or 0.05 inHg)
Other: Calibration; Barometric pressure graph; Barometric pressure differential pointer; Barometric
pressure change indicator
E-109
Digital Compass: 60 seconds continuous reading; 16 directions; Angle value 0° to 359°; Measurement
unit: 1° (digital display)/6° (hand); North indicated by second hand: Compass calibration
(bidirectional, magnetic declination angle)
Altimeter:
Measurement range: –700 to 10,000 m (or –2,300 to 32,800 ft.) without reference altitude
Display range: –3,000 to 10,000 m (or –9,840 to 32,800 ft.)
Negative values can be caused by readings produced based on a reference altitude or due to
atmospheric conditions.
Measurement Unit: 1 m (or 5 ft.)
Current Altitude Data: 1 hour - every second for the first 3 minutes, followed by every 5 seconds for
the remainder of the hour (0'05); 12 hours - every second for the first 3 minutes, followed by
every 2 minutes for the remainder of the 12 hours (2'00)
Other: Reference altitude setting; Altitude differential (–100 to +100m/–1,000 to +1,000m); Altitude
measurement interval (0'05 or 2'00)
Thermometer:
Measurement and display range: –10.0 to 60.0°C (or 14.0 to 140.0°F)
Display unit: 0.1°C (or 0.2°F)
Other: Calibration
Pressure Sensor Precision:
Measurement accuracy: Within ±3hPa (0.1 inHg) (Altimeter accuracy: Within ± 75m (246 ft.))
•Values are guaranteed for a temperature range of –10°C to 40°C (14°F to 104°F).
•Precision is lessened by strong impact to either the watch or the sensor, and by temperature
extremes.
E-110
Bearing Sensor Precision:
Direction: Within ±10°
Values are guaranteed for a temperature range of 10°C to 40°C (50°F to 104°F).
North indicated by second hand: Within ±2 segments
Temperature Sensor Precision:
±2°C (±3.6°F) in range of –10°C to 60°C (14.0°F to 140.0°F)
World Time: 29 cities (29 time zones), UTC (Universal Time Coordinated); Home City/World Time City
switching; one-touch UTC zone access
Other: Daylight Saving Time/Standard Time
Tide/Moon Data: Tide levels (Tide Graph), Moon age; date selection; time selection (Tide Graph only)
Stopwatch:
Measuring unit: 1/100 second
Measuring capacity: 23:59' 59.99"
Measuring modes: Elapsed time, split time, two finishes
Countdown Timer:
Measuring unit: 1 second
Countdown range: 60 minutes
Setting unit: 1 minute
Alarms: 5 Daily alarms; Hourly time signal
Illumination: LED light; Selectable illumination duration (approximately 1.5 seconds or 3 seconds); Auto
Light Switch (Full Auto Light operates only in the dark)
Other: Battery power indicator; Power Saving; Button operation tone on/off; alarm test; auto hand position
adjustment; hand shift feature (to view digital info)
E-111
Power Supply: Solar panel and one rechargeable battery
Approximate battery operating time: 6 months (from full charge to Level 4) under the following
conditions:
•Light: 1.5 seconds/day
•Beeper: 10 seconds/day
•Direction readings: 20 times/month
•Climbs: Once (approximately 1 hour of altitude readings)/month
•Barometric pressure change indicator readings: Approximately 24 hours/month
•Barometric pressure graph: Readings every 2 hours
•Time calibration receive: 4 minutes/day
•Display: 18 hours/day
Frequent use of illumination runs down the battery. Particular care is required when using the auto
light switch (page E-98).
Operation Guide 5371

L-1
L-2
City Code Table
City
Code City UTC Offset/ GMT Differential
PPG Pago Pago –11
HNL Honolulu –10
ANC Anchorage –9
LAX Los Angeles –8
DEN Denver –7
CHI Chicago –6
NYC New York –5
SCL Santiago –4
RIO Rio De Janeiro –3
RAI Praia –1
UTC – –
LON London 0
PAR Paris +1
ATH Athens +2
JED Jeddah +3
THR Tehran +3.5
DXB Dubai +4
City
Code City UTC Offset/ GMT Differential
KBL Kabul +4.5
KHI Karachi +5
DEL Delhi +5.5
KTM Kathmandu +5.75
DAC Dhaka +6
RGN Yangon +6.5
BKK Bangkok +7
HKG Hong Kong +8
TYO Tokyo +9
ADL Adelaide +9.5
SYD Sydney +10
NOU Noumea +11
WLG Wellington +12
•Based on data as of December 2013.
•The rules governing global times (GMT
differential and UTC offset) and summer time
are determined by each individual country.
Operation Guide 5371