La Crosse Technology WT-3129S Manuel utilisateur

Model: WT-3129S www.lacrossetechnology.com/support Page | 1

Model: WT-3129S

Instruction Manual

DC: 033115

12” Atomic Wall Clock

Get Started

Step 1: Slide the switch to select a time zone.

Step 2: Insert 1 fresh AA, Alkaline battery according to the

polarity marked on the case.

Step 3: For the best reception, please place clock on a wall that

faces Ft. Collins, Colorado. During the night, your clock

will automatically set itself.

When the battery is installed, the hands will move to the 12:00

position and search for the radio signal.

If the radio signal is not received in the first 10 minutes, the

clock will start running from the 12:00 position and will

continue to run.

Do not attempt to reset the hands manually even though the

time on the clock is incorrect. The clock is synchronizing to

the WWVB signal and once the radio signal is decoded, the

hands will automatically adjust to the correct time. This may

take up to 5 nights if there is atmospheric interference.

Reset: If the clock does not respond to the various function

modes, press the RESET button on the movement case.

Model: WT-3129S www.lacrossetechnology.com/support Page | 2

Position Clock

For the best reception, please place clock on a wall that faces

Ft. Collins, Colorado. The antenna is best positioned for signal

reception when there is only one wall or window between the

clock and outside.

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.

Large office buildings, schools, or hospitals may not receive

the WWVB time signal in every room.

Buildings with a metal roof may interfere with reception.

Note: We recommend that you change the battery every 24

months to maintain accuracy. Remove the battery when the clock

will not be in use for an extended period.

Manual Set Time

On rare occasions, the clock may

not be able to utilize the radio

controlled function because of 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. Hold the SET button for 3+ seconds to activate the manual

mode. There are two ways to move the minute hand forward.

Hold the SET button down to move the minute hand

forward consistently.

Alternatively, press the SET button rapidly (more than once

per second) to move the minute hand forward step by step

(in minute increments).

Use these features to move the minute hand forward until

the correct time is set. The clock will automatically leave

manual mode after the SET button is not pressed for 6+

seconds.

Model: WT-3129S www.lacrossetechnology.com/support Page | 3

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 that

faces Colorado.

 Weather – Electrical storms between you and Colorado

during the night will interfere with the WWVB signal.

Hands Spin- 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. Hands may

spin if the battery is under powered or over powered.

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.

If you live in an area that does not recognize DST, you must slide

the DST switch OFF. To reactivate the DST program simply slide

the switch to the ON position.

Manual WWVB Time Signal Search

For WWVB information: www.nist.gov/pml/div688/grp40/wwvb.cfm

Manual Signal Search:

The WWVB signal is strongest at night.

Hold the WAVE button down for 3+ seconds.

The hands will automatically reset to the 12:00 position, and

the clock will search for the WWVB time signal.

If the clock receives the signal, the clock will set automatically

to the correct time. The signal search takes approximately 3-8

minutes.

Set the clock manually, and the movement's micro-CPU will

control the time keeping function.

Model: WT-3129S www.lacrossetechnology.com/support Page | 4

Frequently Asked Questions

Q. How long will the battery last?

A. A good AA alkaline battery will last over 24 months.

Q: Can I wire a control timing circuit to the La Crosse Technology® atomic

clock?

A: The clock cannot work on a timing circuit. Opening the clock voids the warranty.

Q: Is there a booster antenna to receive the WWVB signal in a difficult location?

A: The clock cannot work with a booster antenna. Opening the clock or movement

voids the warranty.

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. The WAVE button will temporarily stop a WWVB

search, but will not permanent stop the clock from receiving a WWVB time 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 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 clock which is not to be used for an extended period of

time.

Remove expired batteries promptly.

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.

Before returning a product, please contact our friendly customer support with

questions or visit our online help:

Phone: 1-608-782-1610

Online Product Support: www.lacrossetechnology.com/support

Product Registration:

www.lacrossetechnology.com/support/register

View full warranty details online at:

www.lacrossetechnology.com/warranty_info.pdf

Warranty Address:

La Crosse Technology, Ltd

2830 S. 26th St.

La Crosse, WI 54601

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