Model: 404-1236
Instruction Manual
13.5” Atomic Wall Clock
Get Started
Step 1: Slide the switch to select a time zone.
Step 2: Insert 1 fresh AA, LR6 1.5 volt ALKALINE battery according to the
polarity marked on the case.
Step 3: 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 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.
Position Clock
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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.
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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.
Reset:
If the clock does not respond to the various function modes, reset the clock by
pressing the RESET button on the movement case.
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.
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Manual WWVB Time Signal Search
For information about WWVB, visit: www.nist.gov/pml/div688/grp40/wwvb.cfm
Manual Signal Search:
The WWVB signal is strongest at night.
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Hold the WAVE button down for 3+ seconds.
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. The enforced signal receipt takes
approximately 3-8 minutes. If the clock still fails to receive the signal while in
the WAVE mode, the clock will automatically leave the WAVE mode.
Set the clock manually and the movement's micro-CPU will control the time
keeping function.
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Internal Synchronization:
Once the clock has set correctly by the 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 every day.
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 24 months.
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: 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 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.
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 P (Pacific Time), M (Mountain Time), C (Central Time), and E
(Eastern Time).
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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.
CARE AND MAINTENANCE
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Do not mix old and new batteries
Do not mix Alkaline, Standard, Lithium or Rechargeable Batteries
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.
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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:
For warranty work, technical support or other information contact:
La Crosse Technology, Ltd
2817 Losey Blvd. S.
La Crosse, WI 54601
Contact Support:
1-608-782-1610
Product Registration:
Scan for Online
Information
Online Product Support:
FCC Statement
This Device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) the device must accept any interference
received, including interference that may cause undesired operation.
NOTE: 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
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 in the next issue. We accept no liability for technical mistakes or printing
errors, or their consequences.
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