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Note:
The unit will still try and receive the signal every day despite it being manually set. When it
does receive the signal, it will change the manually set time into the received time. During
reception attempts the WWVB tower icon will flash. If reception has been unsuccessful, then
the WWVB tower icon will not appear but reception will still be attempted the next hour.
WWVB reception occurs daily at 12:00 am and 06:00 am. If the reception is not successful at
12:00 am, then the next reception takes place the next hour and so on until 06:00am, or until
the reception is successful. If the reception is not successful at 06:00 am, then the next
attempt will take place the next day at 12:00 am.
The other times WWVB reception takes place are upon setup and after manual time set
exiting mode. Reception is generally not possible during daylight hours due to the interference
of the sun.
YEAR SETTING
The year can be selected sequentially from 2001 to 2029 and will then start over again
(default setting 2006). Only the last 2 digits of the year will be visible on LCD2.
1. The year digits will start flashing on LCD2. Select the desired year by use of the + key.
2. Press and release the SET
key to switch to the “Month Setting”
.
MONTH SETTING
1. The month digits on LCD2 will start flashing. Set the desired month by use of the + key.
2. Press and release the SET key to move to the mode “Date Setting”.
DATE SETTING
1. The digits for the date will start flashing on LCD2 (Default setting 1). Set the desired
date by use of the + key.
Note: The date can only be set in conjunction with the selected month. For example, it is
not possible to set the date 30 if the month of February is selected.
2. Press and release the SET key to enter the “Weekday Setting”.
WEEKDAY SETTING
1. The weekday symbols will be displayed on LCD2 in the pre-set language and flashing.
Set the desired weekday by use of the + key.
2. Press and release the SET key to enter the mode “12/24 Hours Time Display
Setting”.
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12/24 HOURS TIME DISPLAY SETTING
1. The “12h” or “24h” will start flashing in LCD1 (Default setting 12h). Select the desired
time display mode by use of the + key.
2. Press and release the SET key to enter the “ºF/ºC Temperature Setting“.
°F OR °C TEMPERATURE SETTING
1. The characters “°F” “°C” or will start flashing on LCD1 (Default setting °F). By use of
the + key select “°C” for temperature display in degrees Celsius or “°F” for degrees
Fahrenheit.
2. Press and release the SET key to exit the setting mode and switch back to the normal
display mode.
EXIT THE MANUAL SETTING MODES
• To return to the normal display mode from anywhere in manual setting mode simply
press the SNZ key anytime.
• If no keys are pressed for at least 15 seconds in setting mode, the atomic clock will
automatically switch back to normal display mode.
ALARM SETTING
To enter into the alarm setting mode:
1. Hold the ALM key for 4 seconds. The hour digits start flashing.
2. Press and release the + key to set the hour.
3. Press and release the ALM key to set the minutes. The minute digits start flashing.
4. Press and release the + key to set the minutes.
5. Press and release again the ALM key to exit the Alarm setting mode or wait for 15
seconds automatic timeout.
TO DEACTIVATE THE ALARM:
The alarm will be automatically ON when the alarm time is set. To deactivate the alarm
(OFF), press and release once the ALM key in normal mode display. The alarm icon will
disappear, the alarm is now off.
Alarm icon
(((•))) (ON)
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SNOOZE SETTING
The snooze can only be activated during alarm time for a snooze duration of 10 minutes by
pressing the SNZ key on the back of the clock
OUTDOOR TEMPERATURE SENSOR:
The temperature is measured and transmitted to the atomic clock every 4 seconds. The
atomic clock will update the outdoor temperature display every 4 seconds.
The range of the outdoor temperature sensor may be affected by the temperature. At cold
temperatures the transmitting distance may be decreased. Please bear this in mind when
positioning the sensor. Also the batteries may be reduced in power during periods of extreme
cold temperatures.
915MHz RECEPTION CHECK FOR OUTDOOR TEMPERATURE SENSOR
The atomic clock will receive the temperature data within 3 minutes. If the temperature data is
not being received 3 minutes after setting up (the display shows “- - -”), then please check the
following points:
1. The distance of the atomic clock or outdoor temperature sensor should be at least 6 feet
(2 meters) away from any interfering sources such as computer monitors or TV sets.
2. Avoid placing the receiver onto or in the immediate proximity of metal window frames.
3. Using other electrical products such as headphones or speakers operating on the same
signal frequency (915MHz) may prevent correct signal transmission and reception.
4. Neighbors using electrical devices operating on the 915MHz signal frequency can also
cause interference.
Note:
When the 915 MHz signal is received correctly, do not re-open the battery cover of either the
outdoor temperature sensor or atomic clock, as the batteries may spring free from the
contacts and force a false reset. Should this happen accidentally then reset all units (see
Setting up above) otherwise transmission problems may occur.
The maximum transmission range is 330 feet (100 meters) from the outdoor temperature
sensor to the atomic clock (in open space). However, this depends on the surrounding
environment and interference levels. If no reception is possible despite the observation of
these factors, all system units have to be reset (see Setting up).
CHANGING THE DISPLAY MODE (DAY, SECONDS, AND TEMPERATURES)
There are 4 possible display modes to view the day, seconds, and temperatures.
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The month&date/weekday/indoor temperature/outdoor temperature is the default.
To change the display:
1. Press the + key. The display should now show the
month&date/weekday/seconds/outdoor temperature.
2. Press the + key a second time and the display will show the
month&date/weekday/indoor temperature/seconds.
3. Press the + key a third time and the display will show the month&date/seconds/indoor
temperature/outdoor temperature.
4. Press the + key a fourth time and the display will return to the normal display.
WWVB RADIO CONTROLLED TIME
The NIST radio station, WWVB, is located in Ft. Collins, Colorado and transmits the exact time
signal continuously throughout the United States at 60 kHz. The signal can be received up to
2,000 miles away through the internal antenna in the atomic clock. However, due to the nature
of the Earth’s Ionosphere, reception is very limited during daylight hours. The atomic clock will
search for a signal every night when reception is best. The WWVB radio station derives its
signal from the NIST atomic clock in Boulder, Colorado. A team of atomic physicists
continually measures every second of every day to an accuracy of ten billionths of a second a
day. These physicists have created an international standard, measuring a second as
9,192,631,770 vibrations of a Cesium 133 atom in a vacuum. This atomic clock regulates the
WWVB transmitter.
Once the outdoor temperature is displayed on the atomic clock, the WWVB tower icon in the
clock display will start flashing in the top center of the LCD. This indicates that the clock has
detected a radio signal and is trying to receive it. When the time code is received, the WWVB
tower becomes permanently lit and the time will be displayed.
If the tower icon flashes, but does not set the time or the WWVB tower does not appear at all,
then please take note of the following:
• Recommended distance to any interfering sources like computer monitors or TV sets is
a minimum of 6 feet (2 meters).
• Within ferro-concrete rooms (basements, superstructures), the received signal is
naturally weakened. In extreme cases, please place the unit close to a window and/ or
point its front or back towards the Fort Collins, Colorado, transmitter.
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• During nighttime, the atmospheric disturbances are usually less severe and reception is
possible in most cases. A single daily reception is adequate to keep the accuracy
deviation below 1 second.
Note:
In case the atomic clock is not able to detect the WWVB-signal (disturbances, transmitting
distance, etc.), the time can be manually set (please refer to notes on Manual time setting).
MOON PHASE
The Moon Phases, and their corresponding dates appear in LCD 2. There are 12 visible
Moon Phases that will show in the LCD 2:
New Moon Small Waxing Large Waxing First Quarter Small Waxing Large Waxing
Crescent Crescent Gibbous Gibbous
FullMoon Large Waning Small Waning Last Quarter Large Waning Small Waning
Gibbous Gibbous Crescent Crescent
POSITIONING
Before permanently mounting ensure that the atomic clock is able to receive WWVB signals
from the desired location. Also, extreme and sudden changes in temperature will decrease the
accuracy of the atomic clock, and changes in elevation will result with inaccurate temperatures
readings for the next 12 to 24 hours. These changes will require a 12 to 24 hour wait before
obtaining reliable data.
To achieve a true temperature reading, avoid mounting where direct sunlight can reach the
outdoor temperature sensor. It is recommended to mount the outdoor temperature sensor on
a North-facing wall or in any well shaded area. The maximum transmitting range is 330 feet
(100 meters) obstacles such as walls, concrete, and large metal objects can reduce the range.
Place both units in their desired location, and wait approximately 10 minutes before
permanently mounting to ensure that there is proper reception. The outdoor temperature
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sensor is not waterproof and should not be placed anywhere it will become submerged in
water or be directly in the rain.
POSITIONING THE ATOMIC CLOCK:
There are two possible ways to mount the atomic clock:
• use of the foldout table stands, or
• wall mounting
FOLDOUT TABLE STAND
The foldout table stand leg is located on the backside. Pull the stand out
from the bottom center edge of the atomic clock, below the battery
compartment. Once the foldout table stand is extended, place the atomic
clock in an appropriate location.
WALL MOUNTING
1) Using a straightedge, horizontally space at 4 inch (100mm) three
screw positions on a wall.
2) Install three mounting screws (not included) into a wall within
transmission range—leaving approximately 3/16 of an inch (5mm)
extended from the wall.
3) Place the atomic clock onto the screws, using the hanging holes on the
backside. Gently pull the atomic clock down to lock the screws into
place.
Note:
Always ensure that the atomic clock locks onto the screws before
releasing.
POSITIONING THE OUTDOOR TEMPERATURE SENSOR
The remote temperature sensor can be mounted with the use of screws
