Manual Casio 3157 (page 4 of 5) (English)

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Operation Guide 3157

To use the countdown timer

Press D while in the Countdown Timer Mode to start the countdown timer.

• When the end of the countdown is reached and auto-repeat is turned off, the alarm

sounds for 10 seconds or until you stop it by pressing any button. The countdown

time is automatically reset to its starting value after the alarm stops.

• When auto-repeat is turned on, the countdown will restart automatically without

pausing when it reaches zero. The alarm sounds to signal when the countdown

reaches zero.

• The countdown timer measurement operation continues even if you exit the

Countdown Timer Mode.

• To stop a countdown operation completely, first pause it (by pressing D), and then

press A. This returns the countdown time to its starting value.

Alarms

The Alarm Mode gives you a choice of four one-time

alarms and one snooze alarm.

Also use the Alarm Mode to turn the hourly time signal

(

SIG) on and off.

• There are five alarms numbered

AL1through AL4,

and

SNZ. You can configure SNZ as a snooze alarm

only. Alarms

AL1through AL4 can be used as one-

time alarms only.

• When you enter the Alarm Mode, the data you were

viewing when you last exited the mode appears first.

• All of the operations in this section are performed in the

Alarm Mode, which you enter by pressing C.

Alarm time

(Hour : Minutes)

Alarm number

Current time

To set an alarm time

1. In the Alarm Mode, use D to scroll through the alarm

screens until the one whose time you want to set is

displayed.

AL1 AL2 AL3

SNZSIG AL4

2. Hold down A until the hour setting of the alarm time start to flash, which indicates

the setting screen.

• This automatically turns on the alarm.

3. Press C to move the flashing between the hour and minute settings.

4. While a setting is flashing, use D (+) and B (–) to change it.

• When setting the alarm time using the 12-hour format, take care to set the time

correctly as a.m. (no indicator) or p.m. (P indicator).

5. Press A to exit the setting screen.

Alarm on indicator

Alarm Operation

The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the

watch is in. In the case of the snooze alarm, the alarm operation is performed a total

of seven times, every five minutes, until you turn the alarm off.

• Alarm and hourly time signal operations are performed in accordance with the

Timekeeping Mode time.

• To stop the alarm tone after it starts to sound, press any button.

• Performing any one of the following operations during a 5-minute interval between

snooze alarms cancels the current snooze alarm operation.

Displaying the Timekeeping Mode setting screen

Displaying the

SNZ

setting screen

To test the alarm

In the Alarm Mode, hold down D to sound the alarm.

To turn an alarm and the hourly time signal on and off

1. In the Alarm Mode, use D to select an alarm or the hourly time signal.

2. When the alarm or the hourly time signal you want is selected, press A to toggle it

on and off.

: Indicates alarm is on.

: Indicates snooze alarm is on.

: Indicates Hourly Time Signal is on.

• The alarm on indicator (

), snooze on indicator ( ), and hourly time

signal on indicator (

) are displayed on all modes.

• If any alarm is on, the alarm on indicator is shown on the display in all modes.

Illumination

This watch has an EL (electro-luminescent) panel that

causes the entire display to glow for easy reading in the

dark.

• The electro-luminescent panel that provides illumination

loses power after very long use.

• Illumination may be hard to see when viewed under

direct sunlight.

• The watch may emit an audible sound whenever the

display is illuminated. This is due to vibration of the EL

panel used for illumination, and does not indicate

malfunction.

• Illumination turns off automatically whenever an alarm

sounds.

• Frequent use of illumination runs down the battery.

To turn on illumination

In any mode (except when a setting screen is on the display), press B to illuminate

the display for about one second.

Reference

This section contains more detailed and technical information about watch operation.

It also contains important precautions and notes about the various features and

functions of this watch.

Auto Return Feature

• The watch will return to the Timekeeping Mode automatically if you do not perform

any operation for about two or three minutes while in the Digital Compass/

Thermometer Mode or Alarm Mode.

• If you leave a screen with flashing digits on the display without performing any

operation for two or three minutes, the watch saves any settings you have made up

to that point and exits the setting screen automatically.

Button Operation Tone

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, and

Countdown Timer Mode alarm all operate normally.

To turn the button operation tone on and off

In any mode (except when a setting screen is on the

display), hold down C to toggle the button operation tone

on (

not displayed) and off ( displayed).

• Since the C button also is the mode change button,

holding it down to turn the button operation on or off also

causes the watch’s current mode to change.

• The

indicator is displayed in all modes when the

button operation tone is turned off.

Data and Setting Scrolling

The B and D buttons are used in various modes and setting screens to scroll

through data on the display. In most cases, holding down these buttons during a scroll

operation scrolls through the data at high speed.

Mute indicator

Sensor Error and Low Battery Displays

Subjecting the watch to strong impact can damage the sensor or cause internal

connection problems. These conditions will cause

(error) to appear on the

display, indicating that sensor operation is disabled.

Sensor operation also is disabled whenever

(battery) is on the display, which

indicates insufficient battery power or voltage due to a low battery or a cold

environment.

• If an error occurs or the battery goes low during sensor operation,

or will

appear in the upper right of the display for about 10 seconds, and then change to

---.

▲

• If an error occurs or the battery goes low during bearing sensor correction, or

will appear in the upper right of the display for about one second, and then the

calibration screen will appear. Try performing calibration again.

• If an error occurs or the battery goes low during temperature sensor calibration,

or will appear on the display for about one second. Next, xxx will flash for the

temperature value in the center of the display.

This indicates that temperature sensor calibration is not possible. Press A to exit

the calibration screen, and then try performing temperature sensor calibration again.

• If the

message appears frequently, it could mean the sensor is malfunctioning.

Whenever you have a sensor malfunction, be sure to take the watch to your original

dealer or nearest authorized CASIO distributor as soon as possible.

Timekeeping

• Resetting the seconds to 00 while the current count is in the range of 30 to 59

causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are

reset to 00 without changing the minutes.

• With the 12-hour format, the P (PM) indicator appears on the display for times in the

range of noon to 11:59 p.m. and no indicator appears for times in the range of

midnight to 11:59 a.m.

• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without

any indicator.

• The year can be set in the range of 2000 to 2099.

• 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 battery replaced.

• The times for the Timekeeping Mode and all the city codes of the World Time Mode

are calculated in accordance with each city’s UTC offset.

• The UTC offset is a value that indicates the time difference between a reference

point in Greenwich, England and the time zone where a city is located.

• The letters UTC is the abbreviation for Coordinated Universal Time, which is the

world-wide scientific standard of timekeeping. It is based upon carefully maintained

atomic (cesium) clocks that keep time accurately to within microseconds. Leap

seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s

rotation.

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Casio 3157 Manual

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