La Crosse Technology BBB87740x1 Instruction Manual

Model: BBB87740x1 www.lacrossetechnology.com/support Page | 1

Model: BBB87740x1

Instruction Manual

DC: 042016

18” Indoor/Outdoor Atomic Wall Clock

Get Started

1: Remove the round battery cover from the back of the clock.
2: Insert 1 fresh AA, LR6 1.5 volt ALKALINE battery according to the

polarity marked on the case.
OPTIONAL: For extended battery life, install two additional batteries to
the sides of the movement.

3: Firmly press the time zone button once. Replace battery cover.
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.

Round

Battery

Cover

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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.

• 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.

Daylight Saving
Time Indicator

Time Zone Buttons

Time Set Tab

3 Battery

Compartments

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Set the clock manually:

1. Remove battery for 15 minutes and press the Time 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 Time 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.

Temperature and Humidity

The La Crosse Technology® atomic wall clock has two analog sensors
that measure surrounding temperature and humidity. The temperature
information is displayed in degrees Fahrenheit and Celsius, and humidity
data is displayed in percentage.

The thermometer and hygrometer have been calibrated at the factory.
To check the sensors accuracy, tune to your local weather forecast
information broadcast for the latest weather information. The sensors
may be adjusted.

To manually adjust the sensors, gently turn the temperature or humidity
sensor adjustment at the back of the clock until desired setting has been
reached.

Outer ring
displays
temperature

in degree

Fahrenheit

Inner ring
displays
temperature
in degree
Celsius

Humidity

display

in %

Calibration for

thermometer

Calibration for
hygrometer

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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 aut omatically advance the hands one hour in
the spring and eleven hours in the fall.

Arizona: If you live in an area that does not rec og ni ze DST, you must
press the DST button one time only to turn OFF.

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 re ceive 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

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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.

Q: How do I adjust the Temperature or Humidity?

A: Gently turn the temperature or humidity sensor adjustment at the back
of the clock until desired setting has been reached.

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.

Care and Maintenance

• Do not mix old and new batteries

• Do not mix Alkaline, Standard, Lithium or Rechargeable Batteries

• Always purchase the correct size and grade of battery most 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 with correct polarity (+and -).

• Remove batteries from equipment with is not to be used for an

extended period of time.

• Remove expired batteries promptly.

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Warranty and Support Information

La Crosse Technology, Ltd. provides a 1-year limited time warranty (from date of
purchase) on this product relating to manufacturing defects in materials &
workmanship.

View full warranty details online at:

www.lacrossetechnology.com/warranty_info.pdf
Online Product Support:

www.lacrossetechnology.com/support

For warranty work, technical support or other information contact:

La Crosse Technology, Ltd
2830 26

th

Street S.

La Crosse, WI 54601

Contact Support:

1-608-782-1610

Product Registration:

www.lacrossetechnology.com/support/register