Indoor temperature or seconds display
Weekday or seconds display
ATOMIC CLOCK LCD SCREEN DESCRIPTIONS
The Atomic Clock's LCD is divided into 2 sections and once the batteries are inserted, all the segments will light up
briefly before displaying the information for time, date, indoor and outdoor temperatures.
CHANGING THE DISPLAY MODE (DAY, SECONDS, AND TEMPERATURES)
There are three possible display modes to view the day, seconds, and temperatures.
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 now show the
month&date/seconds/indoor
temperature/outdoor temperature.
3. Press the + key third 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.
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
)
Outdoor
temperature
display
Date
WWVB
time
Alarm icon
Radio reception icon
