La Crosse Technology BBB87740 User manual

Model: BBB87740 www.lacrossetechnology.com/support Page | 1

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

Model: BBB87740 www.lacrossetechnology.com/support Page | 2

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

Model: BBB87740 www.lacrossetechnology.com/support Page | 3

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, 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 the hands one hour in

the spring and eleven hours in the fall.

Arizona: If you live in an area that does not recognize 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

Outer ring

displays

temperature

in degree

Fahrenheit

Inner ring

displays

temperature

in degree

Celsius

Humidity

display

in %

Calibration

screw for

thermometer

Calibration

screw for

hygrometer

Model: BBB87740 www.lacrossetechnology.com/support Page | 4

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.

Q: How do I adjust the Temperature or Humidity?

A: 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.

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

Model: BBB87740 www.lacrossetechnology.com/support Page | 5

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 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 product is not to be used for medical purpose or for public

information. It is intended for home use only.

The specs of this product may change without prior notice.

Improper use or unauthorized opening of housing voids warranty.

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

For warranty work, technical support or other information contact:

La Crosse Technology, Ltd

2830 26th Street S.

La Crosse, WI 54601

Model: BBB87740 www.lacrossetechnology.com/support Page | 6

Contact Support:

1-608-782-1610

Product Registration:

www.lacrossetechnology.com/support/register

Online Product Support:

www.lacrossetechnology.com/support

FCC Statement

This equipment has been tested and found to comply with the limits for a Class B

digital device, pursuant to part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate radio frequency

energy and, if not installed and used in accordance with the instructions, may

cause harmful interference to radio communications. However, there is no

guarantee that interference will not occur in a particular installation. If this

equipment does cause harmful interference to radio or television reception, which

can be determined by turning the equipment off and on, the user is encouraged

to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

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 device may not cause harmful interference, and

(2) this device must accept any interference received, including

interference that may cause undesired operation.

Caution!

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.

or duplicated or processed using electronic, mechanical or chemical process

without the written permission of the publisher.

This booklet may contain errors or misprints. The information it contains is

regularly checked and corrections are included in subsequent editions. We

disclaim any responsibility for any technical error or printing error, or their

consequences.

All trademarks and patents are recognized.

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