La Crosse Technology WT-2100 User Manual

Atomic Alarm Clock

Instruction Manual

Introduction:

Congratulations on purchasing the Atomic Alarm Clock with WWVB Radio controlled time, calendar, 12/24 hours display, time zone with US map, indoor temperature and two alarms settings. This innovative product is ideal for home or office use. Please read this instruction manual to enjoy the full benefits of all the features.

     

Snooze button

              





Battery compartment

Function keys

Features:

• WWVB Radio controlled time with manual setting option

• 12/24 hour time display

•

Time zone with USA map (Pacific Time(-8h); (Mountain Time (-7h); Central Time (-6h);

Eastern Time(-5h) or GMT

• Automatic or manual ON/OFF daylight saving time

• Indoor temperature reading (ºC/ºF user selectable)

• 2 alarm times (crescendo and normal sounding alarms)

• snooze interval setting (from 1 to 59 minutes)

• Calendar display (weekday/month/date or month/ date/year)

• LCD back-light

Setting up the Atomic Alarm Clock:

The clock uses 1 x AA LR6 battery (Alkaline recommended). To set please follow these easy steps:

Battery compartment

Battery cover

1. Slide the battery cover downwards as indicated by the triangle to reveal the battery compartment

2. Observing the correct polarisation insert the battery.

3. Replace battery cover.

4. After power-up, the alarm will sound once and all LCD segments will light up briefly.

5. The clock will now start receiving the WWVB time signal and the radio tower icon will start flashing indicating that time reception is being attempted

6. Time reception takes typically about 3-5 minutes with timeout being 10 minutes. If after 10 minutes the WWVB time signal has still not been received, the user should try one of the following two actions:

 Reset the unit by removing the battery and proceed from step 2 (above). Should after 10

minutes and the time is still not received the clock will automatically attempt to receive the WWVB time signal two hours later.

 Manually set the time (see “Manual Time Setting” below). Note: During the time of power-up (i.e. inserting the battery) DO NOT press any of the keys as

this will interrupt stop the WWVB time signal reception. If keys are pressed during this stage, then proceed from “Setting up the Atomic Alarm” above.

If there is no WWVB signal then the radio tower will not appear on the LCD When WWVB time reception is successful, the received time will automatically override

the manually set time and date. (Please see notes on “Radio Controlled Time

Reception” and “Manual Time Setting”).

Radio controlled Time Reception:

WWVB icon (flashing)

Location test sequence for better

reception

During reception, the WWVB tower icon in the LCD will start flashing. This indicates that the WWVB time signal is present and the clock is trying to receive it. At the same time, three digits “000” will appear below the USA map in the LCD to indicate that the time data from the signal source is being de-coding for the time. The digit on the left should randomly display the numbers 0, 1 or 8 for a strong signal. If 0, 1 or 8 are not displayed, then reposition the clock for a better signal.

When the time signal is received, the WWVB tower becomes permanently lit and the time will be displayed.

General Information on WWVB radio controlled time

NIST Radio Station WWVB is located on the WWVB site near Ft. Collins, Colorado. The WWVB time code is transmitted by the 60 kHz carrier and is broadcast continuously at a rate of 1 pulse per second using pulse width modulation.

The broadcast information includes the year; time intervals; Daylight Saving Time and leap year. The accuracy of the transmitted WWVB signal is better than 1 part in 100 billion (1 x 100

) and with day to day deviations being less than 5 parts in 1000 billion

(5 x 10

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