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La Crosse Technology, Ltd  

Page 2 

 

 
This atomic wall clock offers seven time zones: 

 
 
 
 
 
 
 
 
 

The atomic wall clock works in North America. Outside of North America, the atomic wall clock 
will not receive a WWVB signal, but will keep time like a quartz clock. 
 

Atomic Wall clock Factory Restart 

 
Explanation:

 The factory restart returns the atomic wall clock 

to an “out-of-the-box” state and 

often resolves an issue.  
  

Factory Restart: 

1.  Remove all power from the wall clock.  
2.  Press one of the buttons on the wall clock at least 20 times to clear all memory.  
3.  Verify that the wall clock is blank  
4. 

Leave without power for 15 minutes

 (very important). 

5.  Insert fresh batteries into the wall clock.  
6.  Do not press buttons for 5 minutes. 

 

Fahrenheit/Celsius 

 

  Press and release the 

SET °F/°C 

button to switch the temperature display from Fahrenheit 

to Celsius. 

 

Inaccurate Indoor Temperature Reading 

 

 

Batteries 

may be overpowered or underpowered. Remove power from the wall clock.  

  Press any button 20 times. Leave the wall clock unpowered for 1-2 hours.  

  Install fresh Alkaline batteries with correct polarity.  

  If the indoor temperature is, still contact support with the indoor temperature reading and the 

reading of the comparative product.

 

 

Does the clock have a backlight? 

 

  No the wall clock does not have a backlight.  

 

Time is off by hours 

 

  Check to see if the 

WWVB

 Tower icon appears on the atomic wall clock. If not, the atomic 

wall clock has not received a WWVB time signal in the past 24 hours.  

  Reposition the atomic wall clock with the front or back facing Colorado. 

  Check that the 

Time Zone 

selected correctly reflects your location. Adjust the time zone in 

the 

Program Menu.

 

  Check that the DST indicator is correct for your location (most areas observe DST so this 

should be ON). Adjust the DST indicator in the 

Program Menu.

 

  Large buildings, metal roofed buildings and buildings or rooms full of electrical and/or radio 

equipment make it difficult to receive the WWVB time signal. 
 

 

Daylight Saving Time 

 

Summary of Contents for W88631

Page 1: ...ly 4 Atomic Wall clock has missing segments 5 Batteries Explanation Many problems are resolved with fresh batteries of the appropriate voltage Many items sent in under warranty work when tested with fresh batteries Batteries manufactured this year will have an expiration date 10 years or more in the future Battery technology has improved and batteries will maintain voltage longer in storage Howeve...

Page 2: ...be overpowered or underpowered Remove power from the wall clock Press any button 20 times Leave the wall clock unpowered for 1 2 hours Install fresh Alkaline batteries with correct polarity If the indoor temperature is still contact support with the indoor temperature reading and the reading of the comparative product Does the clock have a backlight No the wall clock does not have a backlight Time...

Page 3: ...tton and move to the next item DAYLIGHT SAVING TIME DST will flash and the word ON Press and release the UP or DOWN buttons to turn this to OFF if you do not observe DST Confirm with the SET F C button and move to the next item HOUR The hour will flash Press and release the UP or DOWN buttons to select the correct hour Confirm with the SET F C button and move to the next item MINUTES The minutes w...

Page 4: ...m of printed scratch guard that may be on the screen of the wall clock This thin piece of plastic has printed numbers for store displays When the batteries are installed the real numbers show behind the printed scratch guard and create distortion With all power removed the wall clock should be blank If numbers still appear please check for scratch guard Power Check that the batteries are installed...

Page 5: ... power removed the wall clock should be blank If numbers still appear please check for scratch guard Power Check that the batteries are installed correctly This is generally a power related issue Batteries may be overpowered or underpowered Remove batteries from wall clock Press any button 20 times Leave the batteries out of the display for 2 hours Insert batteries into the wall clock ...

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