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.
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
CHANGING THE DISPLAY MODE (DAY, SECONDS, AND TEMPERATURE)
There are four possible display modes to view the day, seconds, and temperatures.
The
month&date/weekday/indoor temperature/ is the default.
To change the display:
1.
Press the + key. The display should now show the
month&date/weekday/seconds.
2.
Press the + key a second time and the display will now show the
month&date/seconds/indoor temperature.
3.
Press the + key a third time and the display will return to the default 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.
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
).
Icon description:
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.
Alarm icon
(((
))) (ON)
Sucessful reception of
WWVB time signal
Currently searching for the
WWVB time signal (tower
blinking)
Unsucessful reception of WWVB signal. Will
work as normal quartz clock. Will search for
the WWVB time signal overnight.
