La Crosse 515-1316 Instruction Manual

Atomic Digital Clock

515-1316

Instruction Manual

Congratulations on purchasing this large display clock with radio-controlled time accuracy! This clock is seen easily, from
across the room.

FEATURES:

 Large 7 inch Time display.
 Large 3 ¼-inch calendar: Month, Date, Day
 12/24-hour time selectable
 Atomic Time and Date with manual set option
 Four Time Zones: Eastern, Central, Mountain, & Pacific
 Daylight Saving automatically updates (On/Off option)
 Time alarm with snooze

IMPORTANT:

MODE/SET BUTTON:
AL ON/OFF BUTTON:

- Do Not Mix Old and New Batteries

- Do Not Mix Alkaline, Standard, or Rechargeable Batteries
SETUP:

 Lay the clock face down, on a clean soft towel or newspaper to prevent scratching.
 Open the battery cover. Insert a finger in each of the indentations at the bottom of the battery cover. Push up then pull

out to open the cover.

 Insert three “C” alkaline batteries according to polarity markings.
 Do not press buttons for four minutes to allow the clock to search for a WWVB signal. The tower icon will flash.
 Note: If only the bottom of the tower icon is showing and the top of the icon is not there or partially there,

reposition the clock for better signal reception.

 When WWVB signal reception occurs, the time and date will set and the tower icon will show solid above the

seconds.

WWVB Radio Controlled Time

The NIST radio station, WWVB, is located in Ft. Collins, Colorado and transmits the exact time signal continuously
throughout the United States at 60 kHz. The signal has a range of up to 2,000 miles. However, due to the nature of the

Earth’s Ionosphere, reception is very limited during daylight hours. The atomic clock will search for a signal every night

when reception is best.
 The clock receives the time signal via its built-in antenna and adjusts automatically to the selected time zone. Once

the correct time is set, the clock continues running with an internal quartz-controlled mechanism.

 The internal quartz-mechanism is very accurate; therefore, it does not matter if the clock is occasionally, unable to

receive the time signals.
When the tower icon flashes, but does not set the time or the WWVB tower does not appear at all, take note of the
following:

 Recommended distance to any interfering sources like computer monitors or TV sets is a minimum of 6 feet (2

meters).

 Within ferro-concrete rooms (basements, superstructures), the received signal is naturally weakened. In extreme

cases, please place the unit close to a window and/ or point its front or back towards the Fort Collins, Colorado,

transmitter.

 During nighttime, the atmospheric disturbances are usually less severe and reception is possible in most cases. A

single daily reception is adequate to keep the accuracy deviation below 1 second.
NOTE: On rare occasions, the atomic clock is not able to detect the WWVB-signal (disturbances, transmitting distance,

etc.); the time can be manually set.

FUNCTION BUTTONS:

-Press and release to select Time mode or Alarm
mode.

-Hold to enter program menu in Time mode.

-Hold to set Time Alarm in Alarm mode.

+ 12/24 BUTTON:

-Press and release to select 12-hour or 24-hour time

-Hold to select Time Zone

-When programming, press and release to change a
value.

- BUTTON:

-When programming, press and release to change a
value.

-Hold to activate/deactivate WWVB search.

-Press and release to activate/deactivate time
alarm.

SNOOZE BUTTON:

-When time alarm sounds, press and release to
activate the snooze feature for 5 minutes.

BUTTON:

-Hold to activate/deactivate WWVB search.
RESET BUTTON:

-Gently press with paperclip to reset clock to
default.