Model: WT-3143A www.lacrossetechnology.com/support
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Manual WWVB Time Signal Search
For information about WWVB, visit:
www.nist.gov/pml/div688/grp40/wwvb.cfm
Manual Signal Search:
The WWVB signal is strongest at night.
•
Hold the WAVE button down for 3+ seconds.
•
The hands will automatically reset to the 12:00 position, and the movement
will search for the WWVB time signal from Fort Collins, CO.
•
If the movement successfully receives the signal, the clock will reset
automatically to the correct time. The signal search takes approximately 3-8
minutes.
•
Set the clock manually, and the movement's micro-CPU will control the time
keeping function.
Internal Synchronization:
Once the clock has set correctly by the radio signal, the clock’s CPU operates
continuously. To ensure accuracy, the clock synchronizes the position of the
second and minute hands to the time calculated by the CPU every day. Second
hand synchronization occurs at 1:30 a.m. and 9:30 a.m. and minute hand
synchronization occurs between 1:50 and 2:01 am every day.
Signal Interference:
In some cases, the signal is affected by weather conditions and electrical
interferences, or the location of the clock itself may result in poor reception. If the
clock has not synchronized to the correct time within a few days of activation, you
may need to move the clock to a different location.
Frequently Asked Questions
Q. How long will the battery last?
A.
One good AA alkaline battery will last over 12 months, and over 3 years with
the optional, 2 additional batteries.
Q: Can I wire a control timing circuit to the La Crosse Technology® atomic
clock?
A:
No, the clock cannot work on a timing circuit. Opening the clock voids the
warranty.
Q: Is there a booster antenna to receive the WWVB signal in a difficult
location?
A:
No, the clock cannot work with a booster antenna. Opening the clock or
movement voids the warranty.
Q: Can I shut off the WWVB signal?
A:
No. If you manually set the time, when the clock receives a WWVB signal,
that signal will override the manual set. The WAVE button will temporarily
stop a WWVB search, but will not permanent stop the clock from receiving a
WWVB time signal.
