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Model: WT-3143A   www.lacrossetechnology.com/support          

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Building with a metal roof may interfere with reception.  

 

Reset:

 If the clock does not respond to the various function modes, reset the 

clock by pressing the RESET button on the movement case. 

 

Manual Set Time 

 

On rare occasions in certain areas, the clock may not be 
able to utilize the radio controlled function because of the 
strength of the signal or the geographic location.  In this 
case, the clock can be set manually and used as a regular 
quartz wall clock.  

 
Note:

 Allow up to five nights for the clock to receive the WWVB signal 

before

 

manually setting the time.  
  

Set the clock manually: 

1.  Press and hold the SET button for 3+ seconds to activate the manual mode.  

Once the clock is in manual mode, there are two ways to move the minute 
hand forward.  

2.  Hold the SET button down to move the minute hand forward consistently.   
3.  Alternatively, press the SET button rapidly (more than once per second) to 

move the minute hand forward step by step (in minute increments).  

4.  Use these features to move the minute hand forward until the correct time is 

set.  The clock will automatically leave manual mode after the SET button is 
not pressed for 6+ seconds. 

 

Troubleshooting 

 

The wonderful advantage of owning a radio-controlled clock is that it is virtually 
trouble free. If the clock receives a clear time signal, it will set itself perfectly. If it 
does not receive a time signal, consider the following: 

 

Battery – 

The clock must have a fresh battery to receive and process the 

time signal. 

 

Location – 

Try a different location, ideally near a window. Your clock should 

be at least six feet from computers, TVs, air conditioners, other radio-
controlled clocks and other electrical appliances that cause interference. 

 

Weather – 

Electrical storms between you and Colorado during the night will 

interfere with the WWVB signal. 

 

Daylight Saving Time: 

 
The National Institute of Standards and Technology and WWVB encode a special 
DST “bit” in the WWVB transmission for DST. Your clock will read this information 
and automatically advance the hands one hour in the spring and eleven hours in 
the fall. 

 
Arizona

 

If you live in an area that does not recognize DST, you must slide the DST switch 
OFF. To reactivate the DST program simply slide the switch to the ON position. 
 
 

Summary of Contents for WT-3129B 1 Series

Page 1: ...User Manual of Product 1 La Crosse Technology WT 3143A INT 14 Inch Atomic Wall Clock Black User Manual of Product 2 La Crosse Technology WT 3129B 12 Inch Atomic Analog Wall Clock Pack of 1 Black...

Page 2: ...will start running from the 12 00 position and will continue to run Do not attempt to reset the hands manually even though the time on the clock is incorrect The clock is synchronizing to the WWVB si...

Page 3: ...e the minute hand forward until the correct time is set The clock will automatically leave manual mode after the SET button is not pressed for 6 seconds Troubleshooting The wonderful advantage of owni...

Page 4: ...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 itsel...

Page 5: ...st suitable for intended use Replace all batteries of a set at the same time Clean the battery contacts and also those of the device prior to battery installation Ensure the batteries are installed wi...

Page 6: ...all that faces Ft Collins Colorado During the night your clock will set itself IMPORTANT Hands will move to 12 00 and search for the atomic time signal If no signal after 8 10 minutes clock will run f...

Page 7: ...ove batteries from equipment which is not to be used for an extended time Promptly remove expired batteries Care and Maintenance Warranty Support La Crosse Technology Ltd provides a 1 year limited tim...

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