Casio D120b Manual

							Operation Guide DQD110/120B
1
MA0410-EA
WAVE DEMO
SIG SET RESET
ALARM SETMAX/MINMAX/MIN
ALARM SET
SIGSETRESET
WAVE DEMO
SN
OOZE
ON
OFF

DEMO
WAV E
SIGNAL ON/OFF SETRESET
ALARM SETMAX/MIN
ON
OFF
SNOOZE
MAX/MIN
ALARM SET

DEMO
WAV E
SIGNAL ON/OFFSET RESET
ILLUSTRA TION
•A sticker is affixed to the glass of this clock when you purchase it. Be sure to remove\
 the sticker before using the 
clock.
• Depending on its model number, the configuration of your clock may differ somewhat from that shown in the
illustration.
Alarm Off Snooze Alarm On
PM indicator 
Receive indicator  
(Displayed during  
signal reception.)
DATE 
(month – date)  Day of the week  Antenna icon  
Wave OK indicator  
Current time  
(Hour, minutes, seconds) 
Current 
temperature  Snooze  
on indicator 
Alarm  
on indicator  Alarm time  
						

							Operation Guide DQD110/120B
2
GENERAL GUIDE
1SNOOZE/LIGHT button
•Press this button to illuminate the display for about three seconds.
•Pressing this button while the alarm is sounding stops the alarm.
2MAX/MIN button
Press this button to display the high and low temperature values.
3Alarm Time Set buttons
Use these buttons to change the alarm time or current time setting.
4Alarm Mode selector
SNOOZE: Snooze alarm on
ON: Alarm on
OFF: Alarm  off
5SIG button (SIGNAL ON/OFF button)
Press this button to toggle the Hourly Time Signal on and off.
6SET button
Use this button when setting the current time.
7RESET button
Press this button to reset the clock after replacing its batteries.
8WAVE button
Press this button to receive the time calibration signal and adjust timekeeping.
9DEMO button
Press this button to sound the alarm.
TIME CALIBRATION SIGNAL RECEPTION PRECAUTIONS•This clock can receive the time calibration signals transmitted from
Mainflingen, Germany and Rugby, England. It automatically selects
reception from the transmitter whose signal is strongest.
Mainflingen: Signal reception is possible within approximately 1800 km
of the transmitter.
Rugby: Signal reception is possible within approximately 1800 km of the
transmitter.
•Even when the clock is within the reception range, signal reception is
impossible if the signal is blocked by mountains or other geological
formations between the clock and signal source.
•Signal reception is affected by weather, atmospheric conditions, and
seasonal changes.
•The time calibration signal is bounced off the ionosphere. Because of
this, such factors as changes in the reflectivity of the ionosphere, as well
as movement of the ionosphere to higher altitudes due to seasonal
atmospheric changes or the time of day may change the reception range
of the signal and make reception temporarily impossible.
•Reception is best when the back of the clock is facing in the direction of the transmitter. As a general rule, point
the back of the clock towards the transmitter that is closest to your location. If you experience reception problems,
try pointing it in the direction of the other transmitter. Note, however, that moving the clock while the time
calibration signal receive operation is taking place will make stable reception impossible.
•Think of the clock as acting like a TV or radio when it is receiving the calibration signal. When receiving indoors,
move to a location as near as possible to a window. Proper signal reception can be difficult or even impossible
under the conditions listed below.
•Signal reception is normally better at night than during the day.
•Radio interference can make signal reception impossible.
•Strong electrostatic charge can result in the wrong time being set.
USING THE CLOCK 1This clock can receive the time calibration signals transmitted from Mainflingen, Germany and Rugby, England.
It automatically selects reception from the transmitter whose signal is strongest.
Any of the following procedures can be used to set current date and time.
•Auto receive of the time calibration signal
•Manual receive of the time calibration signal
•Manual setting without using the time calibration signal
Auto Receive•This clock performs a 1-minute receive operation each hour.
•A signal receive operation takes from two to fourteen minutes under good signal conditions.
•As the clock receives a time calibration signal, current signal strength is indicated by the receive indicator, which
is a horizontal line above the current time.
•A longer receive indicator line means better signal reception.
Antenna IconThe antenna icon appears when at least one signal receive operation is successful during a day. The antenna
icon is cleared at 2 a.m. and 3 a.m. each day, and will reappear as soon as a subsequent signal receive
operation is successful.
Wave OK IndicatorThe Wave OK indicator is displayed when there has been a successful receive operation within the last hour.
This indicator disappears at the top of each hour, or when you perform a manual receive operation.
Unsuccessful Signal ReceptionThe antenna icon disappears from the display if no signal receive operation is successful during a continuous
24-hour period. If this happens, try changing the position or orientation of the clock, and press the WAVE button
(8) to receive again.
Manual Receive•Press the WAVE button (8) to start a calibration signal receive operation.
•Use the WAVE button (8) to perform a receive operation after replacing the clock’s batteries or if the auto receive
operation was not performed correctly for some reason.
•The antenna icon appears when signal reception triggered by the WAVE button (8) is successful.
Important!•Do not perform any button or switch operation while a signal receive operation is in progress.
•The time calibration signal includes both Standard Time and Daylight Saving Time (summer time) data.
•The DST indicator appears on the display when Daylight Saving Time (summer time) data is received.
•Note that Daylight Saving Time (summer time) is turned on and off in accordance with the received time
calibration signal only. You cannot turn it on or off manually.
Rugby
Mainflingen
1,800 kilometers
Inside, among
buildings, or near
neon signsInside a vehicle Near refrigerators
or other household
appliances, near
office equipment,
mobile phones or
wireless LAN
devices.Near a construction
site, airport, or
other sources of
electrical noise,
underground or in
tunnels, near
railroads,
highways, or radio
stations with
interfering
frequencies.Near high-tension
power linesAmong or behind
mountains 
						

							Operation Guide DQD110/120B
3
USING THE CLOCK 2
Setting the Time and Date Manually•When using the clock in an area that is outside of the range of the transmitter or in an area where signal
reception is impossible for some reason, you need to manually adjust the time setting as required.
1. Press the SET button (6) to cycle through the setting screens as shown below.
Current Time Screen
Time Setting Screen 12-hour/24hour Setting ScreenContrast Adjustment  Screen Temperature Unit Selection Screen GMT Differential Setting Screen
Year Setting Screen
Month and Day Setting Screen
2.While the screen you want is on the display, use the Alarm Time Set buttons (3) to change the digits that are
flashing.
Press 
 to decrease the flashing digits. Press  to increase the flashing digits.Press 
 to decrease the flashing digits. Press  to increase the flashing digits.

•Holding down  or 
 changes the flashing digits at
high speed.
•
Your GMT differential is a value that indicates the time
difference between your current location and Greenwich
Mean Time (GMT). You can find out the GMT differential
of your location by checking the nearby map.
•You can set the year in the range of 2000 to 2099.
The day of the week is set automatically in accordance
with the date setting.
•Pressing  or 
 while the Time Setting Screen is on
the display causes the seconds count to be reset to 00.
•Each press of  or 
 while the 12-hour/24-hour Setting
Screen is on the display toggles between
12-hour and 24-hour timekeeping.
•You can select one of 16 levels for the contrast setting.
Select the setting that makes the display easy to read.
•While the Temperature Unit Selection Screen is on the
display, press the  or 
 button to toggle between
°C (Celsius) and °F (Fahrenheit).
3. After making the settings you want, use the SET button (6) to display the Current Time Screen.
•The clock automatically returns to the Current Time Screen if you leave a setting screen on the display for about
three minutes without performing any operation.
USING THE ALARM 1The alarm sounds when the alarm time you set is reached. You can also use the Alarm Mode selector (4) to
select the snooze alarm feature.
Setting the Alarm TimeUse the Alarm Time Set buttons (3) to set the alarm time.
Pressing the Alarm Time Set buttons (3) causes the alarm time to appear in place of the date on the display.
MAX/MIN
ALARM SETMAX/MINALARM SET
Press to decrease the alarm time setting. Press to increase the alarm time setting.Press to decrease the alarm time setting.
Press to increase the alarm time setting.

•Holding down  or 
 changes the digits at high speed.
Turning the Alarm On and OffUse the Alarm Mode selector (4) on the side of the clock to turn the alarm on and off, and to select the snooze feature.
Alarm Mode selector
DescriptionThe alarm sounds at the preset time for one minute, and seven more times every five 
minutes thereafter. Even if you stop the alarm sound by pressing the SNOOZE/LIGHT 
button (    ), the alarm operation is performed again five minutes later.
•  The indicator (   ) flashes on the display to indicate that the snooze feature is 
activated. SNOOZE
ON
OFFThe alarm sounds at the preset time for one minute.The alarm does not sound.
•The alarm time appears in place of the date on the display whenever the Alarm Mode selector (4) is set to ON
or SNOOZE.
•The alarm sound changes over four levels as it sounds.
: 0H : 1H : 2H : 3HGMT differential 
						

							Operation Guide DQD110/120B
4
USING THE ALARM 2
Stopping the Alarm•When alarm is sounding, press the SNOOZE/LIGHT button (1) to stop it. When the
snooze feature is turned on, the alarm will sound again in about five minutes.
•To turn off the snooze feature, slide the Alarm Mode selector (4) to OFF.
Using the Hourly Time Signal•When turned on, the Hourly Time Signal sounds on the every hour on the hour from
6:00 a.m. to midnight (19 times per day).
•Press the SIG button (5) to toggle the Hourly Time Signal on and off.
•The SIG indicator indicates that the Hourly Time Signal is turned on.
THERMOMETER FUNCTIONS•A built-in sensor measures temperature and shows the measured value on the display.
•The displayed temperature is replaced by “LO” for temperatures –20.0°C (–4.0°F) and lower,  and “HI” for
temperatures 50.0°C (122.0°F) and higher.
•Though temperature readings are displayed up to 0°C (32°F) and greater than 40.1°C (104.1°F), note that such
readings are actually outside the guaranteed temperature range of this clock.
Switching between Celsius and Fahrenheit•See “Setting the Time and Date Manually” for information about selecting Celsius (°C) or Fahrenheit (°F) as the
temperature unit.
High Temperature and Low Temperature Memory•The following data is stored in memory automatically.
Current Temperature
MAX/MIN button (   )High Temperature
Low Temperature
•Holding down the MAX/MIN (2) button for about two seconds starts auto display, which cycles automatically
between the current, high, and low temperatures. To exit auto display, press the MAX/MIN button (2) again.
•High temperature and low temperature memory is cleared each day at midnight.
USING THE LIGHTPressing the SNOOZE/LIGHT button (1) turns on the light and illuminates the display for easy reading in the dark.Important!•Overuse of the light can shorten battery life.
BATTERY REPLACEMENTReplace batteries whenever the display of the clock becomes dim and difficult to read.
1. Pressing down lightly on the battery compartment cover, slide it downwards and remove it.
2. Remove both of the old batteries.
3. Load two new batteries. Make sure that their positive (+) and negative (–) ends face in the correct directions. If
you load batteries incorrectly, they can burst and damage the clock.
4. Press the RESET button (7). Be sure to press the RESET button (7) after replacing batteries.
5. Replace the battery compartment cover.
Battery precautions•Keep batteries out of the reach of small children. If a battery is accidentally swallowed, contact your physician
immediately.
•Be sure to load the batteries with their positive (+) and negative (–) ends facing correctly.
•Never mix old and new batteries, or batteries of different brands.
•Never charge the batteries that come with the clock.
•
Should batteries ever leak while in the clock, wipe out the fluid with a cloth, taking care not to let any get onto your skin.•Replace the batteries at least once a year, even if the current batteries are working properly.
•The batteries that come with the clock lose some of their power during transport and storage.
Hourly Time Signal On