8
WWVB Radio-controlled Time Signal
The radio controlled weather station searches for, and periodically synchronizes to, the NIST (National Institute of
Standards and Technology) atomic clock signal transmitted from Ft. Collins, Colorado, throughout the entire continental
United States.
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 weather station. However, due to the nature of the Earth’s Ionosphere, reception is very limited during daylight
hours. The weather station will search for a signal every night when reception is best.
•
During nighttime hours, atmospheric conditions improve radio signal reception. A single daily reception is sufficient
enough to keep the clock accuracy within milliseconds.
•
The weather station should be positioned 6 feet (2 meters) from interference sources such as a TVs, computers,
microwaves, etc.
•
The signal reception is weakened within concrete walls found in basements or office buildings. Place the weather
station near the window for best reception.
•
It takes between 24 and 72 hours for the clock to receive an atomic time signal reception
Once the atomic time signal is received, the date and time will be set automatically, and the icon will appear. The weather
station is programmed to search for the atomic time signal daily each hour between 1:00 am and 4:30 am. Once the time
signal has been successfully received, the time and date will be updated automatically.
Manual Signal Search
With the clock and alarm icon flashing, hold the UP
arrow for three seconds to manually search for the WWVB signal. A
triangular tower icon will start flashing next to the clock icon.
Searching for WWVB signal
Strong WWVB signal
Weak WWVB signal
No WWVB signal for 24 hours
Time Alarm
You can choose a time alarm that goes off at the same time every day M-F (weekly alarm), or a single event (single alarm)
time alarm. The snooze feature is programmable for up to 15 minutes and works for the same duration on either alarm.
Alarm/Snooze Time Set
1. With the clock and alarm icon flashing, press the ALARM/CHART button to select the desired alarm.
2.
Hold
the ALARM/CHART button and the
hour
will flash.
3. Set the alarm hour using UP or DOWN arrow button. Press and hold either arrow button for quick digit advance.
4. Press the ALARM/CHART button to confirm selection then the
minutes
will flash.
5. Set the alarm minutes using UP or DOWN arrow button. Press and hold either arrow button for quick digit advance.
6. Press the ALARM/CHART button to confirm selection. Next the
snooze interval
will flash.
7. Set a Snooze interval using UP or DOWN arrow button. Press and hold either arrow button for quick digit advance.
Note:
both alarms share same snooze time duration
8. Press the ALARM/CHART button to confirm your selection.
9. When programming is completed, the weather station will return to the alarm selection screen.
Activate/Deactivate Time Alarms
1. Press the ALARM/CHART button to display the weekday alarm or single day alarm time.
2. If these alarms are not set, the abbreviation
OFF
will be displayed.
3. To enable or disable any of these alarms, press the UP or DOWN button arrow button.
4. Press the ALARM/CHART button to confirm your setting. The alarm symbol will show when that alarm is
active.
