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Model: BBB87740   www.lacrossetechnology.com/support      

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Model:

 BBB87740 

Instruction Manual 

DC: 

121114

 

18” Indoor/Outdoor Atomic Wall Clock 

 

 

Get Started 

 

Step 1: 

Remove the round battery cover from the back of the clock.

 

Step 2: 

Insert 1 fresh AA, LR6 1.5 volt ALKALINE battery according to  

             the polarity marked on the case. Replace the battery cover. 

Step 3:

 Firmly press the time zone button once. 

Step 4:

 Position the clock on an exterior wall that faces Ft. Collins,  

             Colorado. During the night, your clock will automatically set itself. 

Note:

 The hands will move 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 5:

 The default time zone is Pacific Time. If the clocks sets itself and  

             the hours are off, hold the correct time zone button for 5 seconds  
             to correct. 

 

Position Clock 

 

 

Indoor:

 Choose a location 6 feet or more from electronics such as 

cordless phones, wireless gaming systems, televisions, microwaves, 
routers, baby monitors, etc., which can prevent signal reception. 

 

Position near an exterior wall that faces Ft. Collins, Colorado for 
WWVB time signal reception. 

Round 

Battery 

Cover 

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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