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Model: BBB87740   www.lacrossetechnology.com/support      

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Central Time 

 

The antenna is available for signal reception when the front or back 
of the clock faces Colorado. 

 

Outdoor:

 Choose a location with an overhang to protect the clock 

from the overhead sun or standing snow or rain.  

 

A shaded location will prevent inaccurate temperature readings. 
Mount the clock on a wall with the hanging hole on the back of the 
clock. Be sure the battery cover is on snug. 

 

Manual Set Time 

 

On rare occasions in certain areas, the clock may not be 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 Button

 20 

times. 

2. 

After 15 minutes, insert the battery and allow the clock to spin to 
12:00, 4:00 or 8:00. 

3. 

Hold the 

Manual Set Tab

 and the hands will spin.  Continue holding 

until the correct time is achieved. 

Note:

 You can only set the clock manually for about 2 minutes after 

the battery is inserted. If the clock receives the WWVB time signal, 
this signal will override manually set time. 
 

Battery 
Compartment 
1-“AA” 
Alkaline 

Eastern 
Time 

DST ON/OFF  
Button 

Mountain Time 

Pacific  

Time 

Manual  

Set Tab 

Summary of Contents for BBB87740

Page 1: ...or 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 5 The default time zone is Pacific Time If the clocks sets itself an...

Page 2: ... 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 Button 20 times 2 After 15 minutes insert the battery and allow the clock to spin to 12 00 4 00...

Page 3: ...er 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 the hands one hour in the spring and eleven hours in the fall Arizona If y...

Page 4: ...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...

Page 5: ...those of the device prior to battery installation Ensure the batteries are installed with correct polarity and Remove batteries from equipment with is not to be used for an extended period of time Remove used batteries promptly 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 produ...

Page 6: ...nna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help This device must not be co located or operating in conjunction with any other antenna or transmitter Operation is subject to the following two conditions 1 this devic...

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