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Operation Guide 5640
E-89
x Watches that do not have WATER RESIST or WATER RESISTANT marked on
the back cover are not protected against the effects of sweat. Avoid using such
a watch under conditions where it will be exposed to large amounts of sweat or
moisture, or to direct splashing with water.
x Even if a watch is water resistant, note the usage precautions described below.
Such types of use reduce water resistance performance and can cause fogging of
the glass.
− Do not operate the crown or buttons while your watch is submersed in water or
wet.
− Avoid wearing your watch while in the bath.
− Do not wear your watch while in a heated swimming pool, sauna, or any other
high temperature/high humidity environment.
− Do not wear your watch while washing your hands or face, while doing
housework, or while performing any other task that involves soaps or detergents.
x After submersion in seawater, use plain water to rinse all salt and dirt from your
watch.
x To maintain water resistance, have the gaskets of your watch replaced periodically
(about once every two or three years).
E-88
Operating Precautions
Water Resistance
x The information below applies to watches with WATER RESIST or WATER
RESISTANT marked on the back cover.
Water
Resistance
Under Daily
Use
Enhanced Water Resistance Under
Daily Use
5
Atmospheres
10
Atmospheres
20
Atmospheres
Marking
On watch front or on
back cover
No
BAR mark
5BAR 10BAR 20BAR
Example of
Daily Use
Hand washing, rain Yes Yes Yes Yes
Water-related work, swimming
No Yes Yes Yes
Windsurfing No No Yes Yes
Skin diving No No Yes Yes
x
Do not use your watch for scuba diving or other types of diving that requires air tanks.
OPUM-E
E-87
Other: Battery power indicator; Power Saving; Button operation tone on/off; Moving
the Hands to View the Digital Display
Power Supply: Solar panel and one rechargeable battery
Approximate battery operating time: 11 months under the following conditions:
x Display on 18 hours per day, sleep state 6 hours per day
x 1 illumination operation (1.5 seconds) per day
x 10 seconds of alarm operation per day
x 4 minutes of signal reception per day
x 1 hand movement for easy viewing of digital information per day
Frequent use of illumination runs down the battery.
Specifications are subject to change without notice.
E-86
World Time: 48 cities (31 time zones)
Other: Daylight Saving Time/Standard Time; Home Time swapping
Stopwatch:
Measuring unit: 1/100 second
Measuring capacity: 59'59.99"
Measuring modes: Elapsed time, split time
Countdown Timer:
Measuring unit: 1 second
Countdown range: 100 minutes
Setting unit: 1 second
Alarms: 5 Daily alarms; Hourly Time Signal
Double LED light: LED light for the face (Full auto LED light, Super illuminator,
selectable illumination duration (approximately 1.5seconds or
3seconds), afterglow)
LED backlight for the digital display (Full auto LED light, Super
illuminator, selectable illumination duration (approximately
1.5seconds or 3seconds), afterglow)
E-85
Specifications
Accuracy at normal temperature:
±
15 seconds a month (with no signal calibration)
Timekeeping: Hour, minute, second, p.m. (P), year, month, day, day of the week,
alarm countdown
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes); Standard Time/
Daylight Saving Time (summer time)
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
Receivable Time Calibration Signals: Mainflingen, Germany (Call Sign: DCF77,
Frequency: 77.5kHz); Anthorn, England (Call Sign: MSF, Frequency: 60.0kHz);
Fort Collins, Colorado, the United States (Call Sign: WWVB, Frequency:
60.0kHz); Fukushima, Japan (Call Sign: JJY, Frequency: 40.0kHz);
Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60.0kHz) ; Shangqiu City,
Henan Province, China (Call Sign: BPC, Frequency: 68.5kHz)
E-84
■ 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-40
The DST setting may be incorrect. Change the DST setting to Auto DST. E-40
E-83
■ Auto Receive is not performed or you cannot perform Manual Receive.
Possible Cause Remedy Page
The watch is not in the Timekeeping
Mode or World Time Mode, a
countdown timer operation is in
progress, or the hands have been
moved to a position to allow easier
viewing of digital information.
Auto receive is performed only while the
watch is in the Timekeeping Mode or
World Time Mode. Switch to either of
these two modes.
If a countdown timer operation is in
progress, stop it. If the hands have been
moved for easier viewing, return them to
their normal positions.
E-36
Your Home City setting is wrong.
Check your Home City setting and
correct it, if necessary.
E-40
There is not enough power for signal
reception.
Expose the watch to light to charge it. E-10
E-82
■ 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-26), 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-40).
■ 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-24
If you are unable to receive the time
calibration signal, change the standard
time/daylight saving time (DST) setting
manually.
E-42
E-81
■ The watch can’t receive a time calibration signal. The RCVD indicator does
not appear.
Possible Cause Remedy Page
x You are wearing or moving the watch,
or performing a button operation
during the signal receive operation.
x 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 being
performed.
E-24
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.
x Check the website of the organization
that maintains the time calibration
signal in your area for information
about its down times.
x Try again later.
–
E-80
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-13). Continue
exposing the watch to light until the battery power indicator shows H or M.
Time Calibration Signal
The information in this section applies only when LIS, LON, MAD, PAR, ROM, BER,
STO, ATH, MOW, HKG, BJS, HNL, ANC, YVR, LAX, YEA, DEN, MEX, CHI, NYC,
YHZ, YYT, SEL, or TYO is selected at the Home City. You need to adjust the current
time manually when any other city is selected as the Home City.
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