To Recover From The Sleep State; Radio Controlled Atomic Timekeeping - Casio 5142 Operation Manual

Operation Guide 5142
A short while after exposing the watch to light after its battery charge has run down
will cause the x Second Hand to move counterclockwise until it stops at second 57
on the face. This indicates that charging has started. See page E-21 for information
about required charging times.
Power Recovery Mode
The watch is designed to go into a power recovery mode that stops hand operation
temporarily whenever power suddenly drops below a certain level due to overuse
of the alarm tone over a short period. Note that all operations are disabled while the
watch is in the power recovery mode.
The hands will move to the correct positions and the watch will resume normal
operation after power recovers (in about 15 minutes). Putting the watch in a location
where it is exposed to light will help power to recover sooner.
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Power Saving
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.
There actually are two sleep state levels: "second hand sleep" and "function sleep".
Elapsed Time in Dark Operation
x x Second Hand only stopped, all other functions
60 to 70 minutes (second hand
sleep) enabled
All functions, including analog timekeeping, disabled
6 or 7 days (function sleep)
World Time Mode time stopped at the point the
Timekeeping Mode time reached 0:00
The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch
is already in a sleep state when 6:00 AM arrives, however, it will remain in the sleep
state.
The watch will not enter a sleep state while it is in the Stopwatch Split Mode,
Stopwatch Lap Mode, Countdown Timer Mode.
or
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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 "Confi guring Current
Time and Date Settings Manually" (page E-55) 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.
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Important!
The areas covered by HNL (HONOLULU) and ANC (ANCHORAGE) are quite far
from the calibration signal transmitters, so certain conditions may cause reception
problems.
When HNL (HONOLULU) or HKG (HONG KONG) is selected as the Home City,
only the time and date are adjusted according to the time calibration signal. You
need to switch manually between standard time and daylight saving time (DST) if
required. See "To toggle the Home City time between standard time and daylight
saving time" (page E-51) for information about how to do this.
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Japanese Signals
Fukushima
500 kilometers
Fukuoka/Saga
1,000 kilometers
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Chinese Signal
500 kilometers Changchun
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
1,500 kilometers
Charging Times
Exposure Level (Brightness) Operation
Outdoor sunlight (50,000 lux)
Window sunlight (10,000 lux) 30 minutes
Window sunlight on cloudy day (5,000 lux) 48 minutes
Indoor fl uorescent lighting (500 lux)
* 1 Approximate exposure each day to generate power for normal daily operation.
* 2 Approximate exposure to take power up one level.
The above times are for reference only. Actual times depend on lighting conditions.
For details about the operating time and daily operating conditions, see the "Power
Supply" section of the Specifi cations (page E-106).

To recover from the sleep state

Move the watch to a well-lit area, press any button, or perform a crown operation
(push in, pull out, rotate).
If your Home City Code setting is this:
LON (LONDON), PAR (PARIS), ATH (ATHENS)
HKG (HONG KONG)
TYO (TOKYO)
HNL (HONOLULU), ANC (ANCHORAGE),
LAX (LOS ANGELES), DEN (DENVER),
CHI (CHICAGO), NYC (NEW YORK)
Approximate Reception Ranges
UK and German Signals
Anthorn
500 kilometers
1,500 kilometers
Mainfl ingen
The Anthorn signal is receivable
within this area.
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 infl uence 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.
− Mainfl ingen (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 2010, 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.
Using this watch in a country covered by a time calibration signal that is different
from the countries it supports may result in incorrect time indication due to local
application of daylight saving time (summer time), etc.
Level Change *2
Daily
Level 3 Level 2 Level 1
*1
8 minutes 2 hours 23 hours
6 hours 87 hours
9 hours 140 hours
8 hours 94 hours – – –
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The watch can receive the signal from
the transmitter located here:
Anthorn (England), Mainfl ingen
(Germany)
Shangqiu City (China)
Fukushima (Japan), Fukuoka/Saga
(Japan)
Fort Collins, Colorado (United States)
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North American Signal
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
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