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Operation Guide DQR-300
2
1200 km
500 km
Mainflingen
Inside, among
buildings, or near
neon signs
Inside 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 lines
Among or behind
mountains
GENERAL GUIDE
Main unit
1SNOOZE/LIGHT button
• Press this button to illuminate the display for about four seconds.
• Pressing this button while the alarm is sounding stops the alarm.
2Alarm Time Set buttons
Use these buttons to change the alarm time or current time setting.
3SET button
Use this button when setting the current time.
4WAVE button
Press this button to receive the time calibration signal and adjust timekeeping.
5Alarm Mode selector
SNZ: Snooze alarm on
ON: Alarm on
OFF: Alarm off
6RESET button
Press this button to reset the clock after replacing its batteries.
7MAX/MIN TEMP. button
Press this button to display the high and low temperature values.
8MAX/MIN HUMIDITY button
Press this button to display the high and low humidity values.
9CLEAR button
Press this button to clear the currently displayed high/low temperature or humidity.
0°C/
°F button
Press this button to toggle the temperature units between Celsius and Fahrenheit.
ARE-SYNC button
Press this button to re-synchronize the timing of the main unit and the sub-unit.
BSELECT button
Press this button to toggle the display between main unit (INDOOR) and sub-unit (OUTDOOR) data.
Sub-unit
CSELECT button
Press this button to toggle the display between the current temperature and humidity.
DRESET button
Press this button to reset the sub-unit after replacing its batteries.
ETEST button
This button is for testing the unit. Normally, you should not press it. If you do, be sure to press the RESET
button (D) next.
F°C/
°F button
Press this button to toggle the temperature units between Celsius and Fahrenheit.
TIME CALIBRATION SIGNAL RECEPTION PRECAUTIONS
• This clock is able to receive the time calibration signal transmitted from
Mainflingen, Germany (located 25kilometers southeast of Frankfurt).
Signal reception is possible within approximately 1,200 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
atmosaheric 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 toward Mainflingen. 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.
• The alarm does not operate during signal reception.
USING THE CLOCK
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
• The clock receives the time calibration signal eight times each day (2:00, 5:00, 8:00, 11:00, 14:00, 17:00, 20:00,
23:00).
• A signal receive operation takes from two to ten minutes under good signal conditions.
• A receive indicator shows the current status of the receive operation.
Antenna Icon
Receive in progress: Icon flashes
Receive failed: Icon not displayed
Receive successful: Icon displayed
Wave OK Indicator
Receive in Progress: OK not displayed
All receives over the past 24 hours failed: OK not displayed
At least one successful receive over the past 24 hours: OK displayed
Unsuccessful Signal Reception
The antenna icon disappears from the display when a signal receive operation is unsuccessful. If this happens,
try changing the position or orientation of the clock, and press the WAVE button (4) to receive again.
Manual Receive
• Press the WAVE button (4) to start a calibration signal receive operation.
• Use the WAVE button (4) 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 clock beeps and display illumination flashes for about three seconds when a receive operation trigged by the
WAVE button (4) 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.