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Model: WT-3181PL   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

  

 

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

.

 

A good AA alkaline battery will last over 12 months.  

 

Q: 

Is there a version of analog clock with more than the four 

continental US times zones?

 

A: 

La Crosse Technology

®

 does not make an analog clock with more 

than four time zones. These time zones are PT (Pacific Time), MT 
(Mountain Time), CT (Central Time), and ET (Eastern Time). 

 
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.  

 
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 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: Why do the hands spin? 

A:

 When the hands spin about the same time every day the clock is 

auto-correcting the time. The hour hand should not spin more than twice 
around the clock. 

A:

 Hands may spin if the battery is under powered or over powered. Use 

only Alkaline batteries in the clock. 

Summary of Contents for WT-3181PL

Page 1: ...to the 12 00 4 00 or 8 00 position and search for the radio signal If the radio signal is received the time will set If the signal is not received the clock will stay at the 12 00 4 00 or 8 00 position and search for the WWVB time signal on the even hours Once the radio signal is decoded the hands will automatically adjust to the correct time This may take up to 5 nights Step 4 The default time zo...

Page 2: ...able to receive the radio controlled time signal due to 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 Remove battery for 15 minutes and press the Manual Set Tab 20 times 2 After 15 ...

Page 3: ...may be adjusted To manually adjust the sensors use a flat tipped screwdriver to gently turn the temperature or humidity sensor screw at the back of the clock until desired setting has been reached 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 ...

Page 4: ...ake an analog clock with more than four time zones These time zones are PT Pacific Time MT Mountain Time CT Central Time and ET Eastern Time 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 Q Is there a booster antenna to receive the WWVB signal in a difficult location A No the clock cannot work with a...

Page 5: ...erference Weather Electrical storms between you and Colorado during the night will interfere with the WWVB signal Care and Maintenance Do not mix old and new batteries Do not mix Alkaline Standard Lithium or Rechargeable Batteries Do not expose to extreme temperature vibration or shock Clean with a soft damp cloth Do not use solvents The product is not a toy Keep it out of reach of children The pr...

Page 6: ...ay cause undesired operation NOTE THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT SUCH MODIFICATIONS COULD VOID THE USER AUTHORITY TO OPERATE THE EQUIPMENT All rights reserved This handbook must not be reproduced in any form even in excerpts or duplicated or processed using electronic mechanical or chemical procedures with...

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