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La Crosse Technology WT-8005U Clock User Manual

La Crosse Technology WT-8005U Clock Feature

La Crosse Technology LOGO

La Crosse Technology WT-8005U Clock

La Crosse Technology WT-8005U Clock Product

About LA CROSSE Technology
La Crosse Technology is a company that produces a range of electronic products, including weather instruments, clocks, and other home monitoring devices. The company was founded in 1985 and is based in La Crosse, Wisconsin. La Crosse Technology’s product line includes a wide range of weather instruments, such as weather stations, thermometers, hygrometers, and anemometers.

Thank you for purchasing the Atomic Digital Wall Clock, designed for years of trouble-free performance. Please read this important note about setup. Thank you!

After installing batteries, the clock will look for the Atomic time signal for 7 minutes. The buttons will not function during the signal search.


  • Press the WWVB SEARCH button once to stop the Atomic time signal search.
  • Manually set the time, date, and time zone.
  • The clock will search for the Atomic time signal again after midnight.
  • Press the WWVB SEARCH button anytime, to start an Atomic signal search.

For information about Atomic Time, visit: www.nist.gov/pml/div688/grp40/wwvb.cfm

Get Started

  1. Insert 2 new AA, Alkaline batteries into the clock. Observe the correct polarity. La Crosse Technology WT-8005U Clock FIG-1
  2. Wait for the clock to set itself to Pacific time zone (default) then press the ZONE button to select your time zone.
  3. Stop the initial Atomic Time Search and set the time manually.

Settings: Time, Date, etc

  • Hold the SET button to enter time set mode.
  • Press the La Crosse Technology WT-8005U Clock FIG-2 buttons to adjust values.
  • Press SET to confirm adjustments and move to next item.

Settings order:

  1. 12/24 Hour Format
  2. Hour
  3.  Minutes
  4. Year
  5. Month
  6. Date
  7. Daylight Saving Indicator (ON to automatically change)

Press SET to exit, or wait 30 seconds without pressing buttons to return to the normal time display.

La Crosse Technology WT-8005U Clock FIG-3

Fahrenheit/Celsius & Time Zone Settings

Choose Fahrenheit/Celsius

La Crosse Technology WT-8005U Clock FIG-4

  • Press the ºF/ºC button to switch from Fahrenheit to Celsius temperature display.

Select Time Zone

La Crosse Technology WT-8005U Clock FIG-5

  • This clock has four time zones to choose from.
  • The default time zone is Pacific (P)
  • Press the ZONE button to select your time zone.


    • P = Pacific
    • M = Mountain
    • C = Central
    • E = Eastern 

Set Time Alarm

  1. Hold the ALARM button for 3 seconds until the seconds are replaced by the letters “AL”.
  2. The alarm hour will flash.
  3. Use the La Crosse Technology WT-8005U Clock FIG-6 buttons to set the hour. Press the ALARM button once.
  4. The alarm minutes will flash,
  5. Use the buttons the set the minutes.
  6. Press the ALARM button to confirm and exit.

La Crosse Technology WT-8005U Clock FIG-7

Activate/Deactivate Alarm

Setting the alarm time and activating the alarm are separate steps.

  1. Press the ALARM button to enter alarm mode.
  2. In alarm mode, press and release theLa Crosse Technology WT-8005U Clock FIG-8 to activate or deactivate the time alarm.
  3. The alarm icon (bell) will appear when active.
  4. The alarm icon (bell) will disappear when inactive. 


  • Press SNOOZE to silence an active alarm for 5 minutes.
  • The alarm icon will flash.
  • This is a crescendo alarm that will sound for 120 seconds unless deactivated.
  • Press any button to stop the alarm for 24 hours.

La Crosse Technology WT-8005U Clock FIG-9

Reset Button

  • If the atomic clock display appears distorted or is not responding to buttons, use a pen or paper clip to press RESET one time.
  • This will reset the atomic clock to default settings.

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 the intended use.
  •  Replace all batteries of a set at the same time.
  • Clean the battery contacts and those of the device before battery installation.
  • Ensure the batteries are installed with the correct polarity (+ and -).
  • Remove batteries from equipment that is not to be used for an extended period of time.
  • Promptly remove expired batteries. Care and Maintenance


Battery Life
Temperature Range: 14.1°F to +139.9°F
(-9.9ºC to +59.9ºC)
2-AA, IEC, LR6 batteries (not included)
24 months with reputable batteries brands
8.9” L x 1.2” W x 7.2” H
(226.06 L x 30.48W x 182.8 H mm)

Warranty and Support

La Crosse Technology, Ltd. provides a 1-year limited-time warranty (from the 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:

Product Registration:

View full warranty details online at:

Warranty Address:
La Crosse Technology, Ltd 2830 S. 26th St. La Crosse, WI 54601

Protected under U.S. Patents:
5,978,738 | 6,076,044 | RE43903

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 to 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.

The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user’s 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 an electronic, mechanical or chemical processes 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.


FAQ’s La Crosse Technology WT-8005U Clock User Manual

How is the La Crosse clock operated?

The Atomic Clocks from La Crosse Technology automatically set the time and date. There is a secret inside. Atomic clocks automatically synchronize to a radio signal called WWVB that is continuously broadcast from Fort Collins, Colorado by the National Institute of Standards and Technology (NIST).

How can the time be changed on a La Crosse clock?

To enter settings mode, hold the SET button down for two seconds. Adjust the flashing values by using the + or – button. Hold the + or – button to make fast adjustments. To proceed to the following item and confirm alterations, use the SET button.

Do la crosse clocks work well?

Very good clock all around. It is significantly better than other digital clocks in that it only requires one double A battery.

How do you maintain La Crosse Clock’s lights?

For 10 seconds, adjust the backlight by pressing and releasing the LIGHT button. 0FF | 1.5% | 20% | 50% | 100% Intensity Levels. The station will automatically return to the auto-dim setting on the subsequent start point if you change the backlight setting, and it will stay on the new setting if you don’t.

Do atomic clocks require batteries?

Atomic clocks made by American Time have a radio receiver that receives a signal from the National Institute of Standards and Technology and a battery-powered movement (NIST) Fort. Atomic clock

Where are clocks made in La Crosse?

Our sales, distribution, and customer service staff are all based in La Crosse, Wisconsin, which is nestled amid the bluffs of the stunning Mississippi River Valley in Western Wisconsin.

How is the alarm on a La Crosse WT-8005U clock silenced?

To deactivate or activate the alarm from the regular time display, press and hold the ALARM button.

Can a la crosse thermometer be calibrated?

The humidity levels range from 3% to 99% (%RH), while the temperature ranges from -39.8°F to 139.8°F. There is no way to calibrate these sensors. The mounting and positioning problem is the main reason for inaccurate readings.

In La Crosse WT-8005U, is the clock stopped?

When a goal is scored during a game (varsity or sub-varsity), the clock must stop on the umpire’s whistle and arm signal. It must also stop when a foul is called in the crucial scoring area during the final two minutes of either half.

Is there a timer in La Crosse WT-8005U?

With the exception of the final two minutes of the second half, the game will be divided into two 25-minute halves. A three-minute intermission will occur. Every half, there is one 30-second timeout for each team.

Pdf – La Crosse Technology WT-8005U Clock User Manual

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