La Crosse Technology WT-3126H User Manual

WT-3126H

Radio Controlled Analog Clock

Quick Setup Instructions

Welcome to the world of atomic timekeeping technology. We hope you wi ll
enjoy the convenience of never having to s et your clock again and the
confidence of knowing exactly what time it i s.

 A locking pin may be placed into the movement at the factor y to pr event

shifting of the hands during shipment. Remove the locking pin directly
below the Reset button. This will unlock the hands and enable the clock
to set itself after receiving the signal.

 Set the clock to your time zone by moving the indicator arrow to

appropriate zone: P (UTC-8 Pacific Time), M ( UTC-7 Mountai n Time), C
(UTC-6 Central Time), E (UTC-5 Eastern Time)

 Enable the Daylight Savings Time Auto Adjust feat ure by moving the

DST switch to “ON”. If you are in a time zone that does not follow DST,
make sure you set the DST mode to “OFF”. The Daylight Savings Ti me
feature is disabled when the switch is set to “OFF”.

 Insert 1 new AA, LR6 1.5 volt ALKALINE batte ry in t he analog clock

battery compartment according to the polarity marked on the case.

 Once the battery is installed, the radio reception mode is activated and

the second, minute and hour hands will automatically reset to the 12:00
position. Once the hands are in the 12:00 pos ition, the movement will
start searching for the radio signal. The s earch procedures takes
approximately 3 to 10 minutes after all hands have set t o the 12:00
position. If a signal is found within the f ir st 3 to 10 minutes, the clock will
set to the correct time. If the clock does not receive a radio signal soon
after activated, the clock will start running f r om the 12:00 position and
will continue to run. In this case, do not at tempt to reset the hands
manually even though the time displayed 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.

 The WAVE button can be used to attempt an enforced signal receipt.

To activate, hold the WAVE button down for 3+ seconds. Once the
WAVE feature is activated, the hands will automatically reset to the
12:00 position, and the movement will attempt to enforce a signal receipt
from Fort Collins, CO. If the movement successfully receives the signal,
the clock will reset automatically to the correct time. Generally, the
signal enforced receipt takes approximately 3-8 minu t es. If the clock still
fails to receive the signal while in the WAVE mode, the clock will
automatically leave the WAVE mode. In this case, set the clock
manually according to instructions below and the t ime keeping function
will be controlled by the movement’s micro-CPU.

 Manual Set: On rare occasions in certain areas, the clock may not be

able to utilize the radio-controlled func tion because of either the strength
of the signal or the geographic locat ion. In this case, the cloc k can be
set manually and used as a regular quartz wall clock. If it is necessary
to set the clock manually, press and hold the SET butt on for 3+ seconds
to activate the manual mode. Onc e the clock is in manu al mode, there

are two ways to move the minute hand forward. Hold the SET butt on
down to move the minute hand forward consistently. Or, press the SET
button rapidly (more than once per second) to move the minute hand
forward step by step (in minute increments). Use these fea tures to move
the minute hand forward until the c orrect time is set. The clock will
automatically leave manual mode after the SET but ton is not pressed for
6+ seconds.

 Reset: If the clock does not respond to the various funct ion modes, you

 Internal S ynchr on i zation: Once the clock has been set correctly by the

 Signal Interference: In some cases, the signal can be affected by

NOTHING IS MORE PRECISELY MEASURED THAN TIME!

Since the beginning of time, man has been fascinated with the measurement
of time and has devised more accurate machines to trap and measure time.
Today, time is precisely measured in the United Stat es by the most accurate
clock in North America, the Atomic Clock of the US National Institute of
Standards and Technology, Time and Frequency Division in Boulder,
Colorado. A team of atomic physicists continually measures every second of
every day to an accuracy of ten billionths of a second per day. These
physicists have created an international standard, measuring a second as
9,192,631,770 vibrations of a Cesium 133 atom in a vacuum. This atomic
clock regulates the WWVB radio transmitter located in Fort Collins, Color ado,
where the exact time signal is continuously broadcast throughout the United
States at 60 kHz to take advantage of stable long wave radio paths found in
that frequency range. Radio waves at these low frequencies use the earth
and the ionosphere as a wave-guide and follow the curvature of the earth for
long distances.

The built in antenna system will receive the WWVB s ignal anywhere in North
America within 2000 miles of Fort Collins where long-wave radio reception is
undisturbed. A microprocessor activates th e receiver and processes the time
signal from Fort Collins overnight.

can reset the clock by pressing the RESET button on the movement
case.

radio signal, the clock’s CPU operates continuously. To ensure
accuracy, the clock synchronizes the position of the second and minute
hands to the time calculated by the CPU every day. Second hand
synchronization occurs at 1:30 a.m. and 9:30 a.m. and minute hand
synchronization occurs between 1:50 and 2:01 am e very day.

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 t ime within a few days of act ivation, you may
wish to move the clock to a different loc ation. Try to place it near an
outside wall closest to the direction of Colorado. Avoid placing the cloc k
near electrical items such as TVs, microwave ovens and computers.

SET BUTTON

RESET BUTTON

TIME ZONE SWITCH

WAVE BUTTON

BATTERY
COMPARTMENT

DST ON/OFF BUTTON

Through the radio signals, La Crosse Technolo gy atomic clocks always keep
precise time. The changeover from standard time to daylight saving time, and
vice versa, takes place automatically with the same precis ion.

The La Crosse Technology atomic clock is designed for indoor use. For
indoor locations, select a location to place your radio controlled clock where it
will be at least six feet away from a TV, computer, air conditi oner or other
household electrical appliances. The optimal location is near a window.
Windows facing Colorado provide the best signal.

Notes:

 Do not submerge clock in water.
 Extreme temperatures, vibration, and shock should be avoided to

prevent damage to the clock.

The WWVB time signal will easily penetrate masonry and wood framed
buildings. The WWVB signal will penetrate almost every residential building
and most steel buildings if they have adequate windows. It is not possible,
however, for the WWVB signal to penetrate most indoor shopping malls and
rooms in the center of large office buildings that do not have windows. In
buildings that WWVB cannot penet r ate you may set the time using the manual
time set button. When the clock receives the WWVB signal it will
automatically set the hands to the exact time.

La Crosse Technology atomic clocks do not receive or process radio
controlled time signals from Germany’s DCF 77, Japan’s J Ga AS, or
England’s MSFs atomically regulated transmitters. La Crosse
Technology atomic clocks can be manually set and used anywhere.
Please Note: WWVB time will over ride a manual setting.

For more information on the NIST and radio controlled time, see
www.boulder.nist.gov/timefreq/

DAYLIGHT SAVING TIME

The National Institute of Standards and Tec hnology and WWVB encode a
special DST “bit” in the WWVB transmission for DST. Your La Crosse
Technology clock will read this information and automat ically advance the
hands one hour in the spring and eleven hours in the fall.

WARRANTY

La Crosse Technology, Ltd provides a 1-year limited warranty on this pr oduct
against manufacturing defects in materi als and workmanship.

This limited warranty begins on the original date of purchase, is valid only on
products purchased and used in North America and only to the original
purchaser of this product. To receive warranty service, the purchaser must
contact La Crosse Technology, Ltd for problem determination and service
procedures. Warranty service can only be perfo r med by a La Crosse
Technology, Ltd authorized service center. The original dated bill of sale must
be presented upon request as proof of purc hase to La Crosse Technology, Ltd
or La Crosse Technology, Ltd’s authorized service center.

La Crosse Technology, Ltd will repair or replace thi s pr oduct, at our option and
at no charge as stipulated herein, with new or reconditioned parts or products
if found to be defective during the limited warranty period specified above. All
replaced parts and products become the property of La Crosse Technology,
Ltd and must be returned to La Crosse Technology, Lt d. Replacement parts
and products assume the remaining origin al warr anty, or ninety (90) days,
whichever is longer. La Crosse Technology, Ltd will pay all expenses for labor
and materials for all repairs covered by this warranty. If necessary repairs are
not covered by this warranty, or if a product is examined which is not in need
or repair, you will be charged for the repairs or examinatio n. The owner must
pay any shipping charges incurred in getting your La Crosse Technology, Lt d
product to a La Crosse Technology, Ltd authoriz ed service center. La Crosse
Technology, Ltd will pay ground return shipping charges to the owner of the
product to a USA address only.

Your La Crosse Technology, Ltd warranty covers all defects in material and
workmanship with the following specified exceptions: (1) damage caused by
accident, unreasonable use or neglect (including the lack of reasonable and
necessary maintenance); (2) damage occurring duri ng shipment (claims must
be presented to the carrier); (3) damage to, or deterioration of, any accessory
or decorative surface; (4) damage resul t ing from failure to follow instructions
contained in your owner’s manual; (5) damage resulting from t h e performance
of repairs or alterations by someone othe r than an authorized La Crosse
Technology, Ltd authorized service center; (6) units used for other than home
use (7) applications and uses that this pr oduct was not intended or (8) the
products inability to receive a signal due to any source of interference. This
warranty covers only actual defects within the product it self, and does not
cover the cost of installation or removal from a fixed installation, normal set-up
or adjustments, claims based on misrepr esentation by the seller or
performance variations resulting from installation-related circumstances.

LA CROSSE TECHNOLOGY, LTD WILL NOT ASSUME LIABILITY FOR
INCIDENTAL, CONSEQUENTIAL, PUNITIVE, OR OTHER SIMILAR
DAMAGES ASSOCIATED WITH THE OPERATI ON O R MALFUNCTION OF
THIS PRODUCT. THIS PRODUCT IS NOT TO BE USED FOR MEDICAL
PURPOSES OR FOR PUBLIC INFORMATION. THIS PRODUCT IS NOT A
TOY. KEEP OUT OF CHILDREN’S REACH.

This warranty gives you specific legal rights. You may also have other rights
specific to your State. Some States do no allow the exclusion of
consequential or incidental damages therefore the above exclusion of
limitation may not apply to you.

For warranty work, technical support, or information contact:

The complete instruction manual is available at:
www.lacrossetechnology.com/3126h

Le manuel d'instruction complet est disponible sur:
www.lacrossetechnology.com/3126h

El manual de instrucciones completo está disponible en:
www.lacrossetechnology.com/3126h

All rights reserved. This handbook must not be reproduced in any form, even in excerpts, or
duplicated or processed using electronic, mechanical or chemical procedures without
written permission of the publisher.

This handbook may contain mistakes and printing errors. The information in this handbook
is regularly checked and corrections made i n the next issue. We accept no liabili ty for
technical mistakes or printing errors, or their consequences.
All trademarks and patents are acknowledged.

La Crosse Technology, Ltd

2817 Losey Blvd. S.

La Crosse, WI 54601

EJMA3143L210

Printed in China

SET BUTTON

RESET BUTTON

TIME ZONE SWITCH

WAVE BUTTON

BATTERY COMPARTMENT

DST ON/OFF BUTTON