
Model: C86279
Instructional Manual
DC: 120716
Atomic Digital Ofce Clock
MONTH
DATE
Table of Contents
LCD Features .............................................................................
Custom Display Modes ................................................................
Setup .......................................................................................
Atomic Time Signal .....................................................................
Settings: Language, Time, Date, etc. ............................................
Set Alarm Time ..........................................................................
Activate/Deactivate Alarm ...........................................................
Snooze .....................................................................................
Care and Maintenance .................................................................
Warranty and Support .................................................................
Specifications ............................................................................
Low Battery Icon ........................................................................
FCC Statement ..........................................................................
Canada Statement ......................................................................
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• The clock will automatically search at UTC 7:00, 8:00, 9:00, 10:00,
and 11:00.
• If there is no WWVB reception, the clock will search for the atomic
time signal every 2 hours until the WWVB time is received.
• After reception, this clock will only search for the atomic signal
after midnight.
• From normal time display hold the MINUS button for 3 seconds, to
search for the WWVB time signal.
• For information about WWVB visit:
www.nist.gov/pml/div688/grp40/wwvb.cfm
LCD Features
1
4
3
2
1
Buttons (on top)
Displays Weekday or
Weekday/Month/Date
Atomic Time
MONTH
DATE
4
3
2
5
6
7
8
5
6
7
8
Atomic Time Reception Icon
Low Battery Icon
Snooze Icon Zz
Alarm Active Icon (bell)
Displays Date, Seconds or
Indoor Temperature
Setup
Custom Display Modes
MONTH
DATE
• Press and release the MODE button to customize how the top and
right sections of the clock are displayed.
• The clock will stay in the mode selected.
MODE 1:
Weekday &
Month/Date
MODE 2:
Day/Month/Date
& Temperature
MODE 3:
Day/Month/Date
& Seconds
Settings: Language, Time, Date, etc.
• Hold the MODE button to enter time set mode.
• Press the + or - buttons to adjust the values.
• Press the MODE button to conrm adjustments and move to the
next item.
• Press the SNOOZE button at any time to exit.
Time set order:
1. Language (English or Spanish)
2. Beep ON/OFF
3. Atomic ON/OFF
4. Time Zone
5. DST ON/OFF
6. 12/24 Hour
7. Hour
8. Minutes
9. Year
10.Month
11.Date
12.Fahrenheit/Celsius
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DAY MONTH DATE
DAY MONTH DATE MONTHDAY DATE
Atomic Time Signal
1. Insert the 5.0 volt AC adapter
into the outlet then into the
clock.
2. (Optional) Insert 2 “AA”
batteries into the clock
according to polarity markings.
3. Set Time/Date
Note: The clock will search for
atomic time 2 hours after
batteries are installed. The
backlight will be out briey
during the search.
AA
AA
5.0 VAC

1. Hold the MODE button for 3 seconds to enter settings mode.
ENGLISH will show. Use the +/- button if you wish to select
ESPAÑOL (Spanish).
2. Press the MODE button to move to BEEP ON/OFF.
Use the +/- button to turn off the beep sound.
3. Press the MODE button to select atomic time signal ON/OFF.
Use the +/- button if you do not want atomic time reception.
5. Press the MODE button to select daylight saving time ON/OFF.
If you do not observe DST, use the +/- button to turn off the
Daylight Saving Time Indicator.
4. Press the MODE button to select your time zone.
Use the +/- button to adjust.
Note: If you choose OFF for atomic time, the clock will skip time
zone and DST setting and jump to 12/24 hour time.
AST = Atlantic
EST = Eastern
CST = Central
MST = Mountain
PST = Pacic
AKT = Alaska
HAT = Hawaii
6. Press the MODE button to select 12 hour or 24 hour time format.
Use the +/- button to adjust.
7. Press the MODE button to set the Hour.
Press the +/- button to adjust.
8. Press the MODE button to set the Minutes.
Press the +/- button to adjust. Hold to adjust quickly.
9. Press the MODE button to set the Year.
Press the +/- button to adjust.
10.Press the MODE button to set then set the Month.
Press the +/- button to adjust. Hold to adjust quickly.
11.Press the MODE button to set the Date.
Press the +/- button to adjust. Hold to adjust quickly.
12.Press the MODE button to select Fahrenheit or Celsius temperature
display. Press the +/- button to adjust.
13. Press the MODE button to conrm and exit.
Note: Press the SNOOZE button at any time to exit settings.
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IMPORTANT:
Please turn DST to OFF on this
clock. This function was reversed in
the programming.
Backlight: HI-LOW-OFF
• When operating with the AC adapter, the backlight is adjustable:
(HI-LOW-OFF).
• Press and release the SNOOZE/LIGHT HI-LOW-OFF button to
adjust backlight.
• When operating on batteries only, the backlight will come on
briey when the SNOOZE button is pressed.

Set Time Alarm
1. Hold the ALARM button to enter alarm settings. “AL” will show.
2. The Alarm Hour will ash. Press the +/- button to adjust.
3. Press the ALARM button to set the Minutes.
4. The Alarm Minutes will ash. Press the +/- button to adjust.
Hold to adjust quickly.
5. Press the ALARM button to conrm and exit.
Activate/Deactivate Alarm
1. Hold the ALARM button to enter alarm settings. “AL” will show.
2. Press and release ALARM to activate/deactivate the alarm.
3. The bell icon will show when active.
Snooze
1. When alarm sounds press the SNOOZE button to silence the alarm
for 10 minutes.
2. The alarm bell icon will show and Zz will ash.
3. Press any button except SNOOZE to stop the alarm for 1 day.
Note: Alarm is crescendo sound. When the alarm sounds, it
continues for 2 minutes and then shuts off completely.
• 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 equipment which is not to be used for an
extended period
• Promptly remove expired batteries.
Care and Maintenance
Specications
Warranty and Support
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
Temperature Range: +32 °F to +99°F (0°C to 37°C)
Power: 5.0VAC # GPU280500150WA00
Optional-2-AA, IEC, LR6 batteries (included)
Battery Life: Battery life is over 24 months when using reputable brands
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Protected under U.S. Patents:
5,978,738 | 6,076,044 | RE43903
Alarm ON Alarm OFF
Low Battery Icon
• The low battery icon will appear between the hour and minutes.
• This icon indicates it is time to replace the batteries.

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 changes or modications to this equipment. Such changes or
modications could void the user authority to operate the equipment.
All rights reserved. This manual may not be reproduced in any form, even in
part, 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.
Canada Statement
This device complies with Industry Canada’s license-exempt RSSs.
Operation is subject to the following two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may
cause undesired operation of the device.
FCC Statement
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