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La Crosse Technology, Ltd  

Page 2 

 

Batteries 

 

Explanation: Many problems are resolved with fresh batteries of the appropriate voltage. 

Many items sent in under warranty work, when tested with fresh batteries. Batteries 

manufactured this year will have an expiration date 10 years (or more) in the future. Battery 

technology has improved, and batteries will maintain voltage longer in storage. However, 

the environment the batteries reside in for the 10 years can deplete the power. 

 

 

We suggest name brand Alkaline batteries for indoor displays.  

 

A minimum voltage of 1.48V for each battery is necessary for proper performance.   

 

Use batteries dated at least six years in advance of the current year. Batteries dated 

earlier than six years from now may still work but may be unstable in performance.   

 

Good name brand batteries make less noise, which reduces the chance of RF (radio 

frequency) interference from the battery compartment.  

 

Digital Clock Factory Restart 

 

Explanation: The factory restart returns the clock and outdoor sensor to an “out-of-the-

box” default state and often resolves an issue.  

  

Factory Restart: 

1.

 

Remove all power from outdoor sensor and clock.  

2.

 

Press one of the buttons on the clock at least 20 times to clear all memory.  

3.

 

Verify that the clock is blank before proceeding (there may be lines painted on the 

screen that will show when there is no power). 

4.

 

Leave both units without power for 15 minutes (very important). 

5.

 

Insert fresh batteries into the outdoor sensor, then into the clock. 

6.

 

Keep the outdoor sensor 5-10 feet from the clock. 

7.

 

When RF connection is established, the temperature/humidity will appear on the 

station. Allow the outdoor sensor and clock to sit together for 15 minutes to establish a 

strong connection.  

8.

 

Do not press buttons for 15 minutes. 

 

For optimum 433MHz transmission, place the outdoor sensor no more than 330 feet 

(100 meters, open air) from the clock. 

 

See the section on 

mounting 

and 

distance/resistance/interference 

for details on 

mounting the outdoor sensor. 

 

Compatible Outdoor sensors 

 

 

The TX191TH Outdoor sensor comes packaged with this atomic clock.  

 

The TX191TH (433MHz) Outdoor sensor is compatible with this atomic clock.  

 

Power Requirements 

 

 

2-AA

 batteries 

power the Outdoor sensor.  

 

2-AA

 batteries 

power the clock.  

 

We recommend Alkaline batteries for the Outdoor sensor. 

 

Summary of Contents for 515-1912

Page 1: ...ure 3 Outdoor Temperature is stuck or HH H LL L 4 Outdoor sensor drains batteries quickly 4 Outdoor sensor fell The sensor no longer works 4 Mounting Positioning Outdoor sensor 5 Fahrenheit Celsius 5 Supported Time Zones 5 Dashes HHH LLL or Stuck Indoor Temperature 6 Does the clock have a backlight 6 Time is off by hours 6 Daylight Saving Time 6 Manually Set Time Date Program Menu 7 No WWVB Tower ...

Page 2: ...e and often resolves an issue Factory Restart 1 Remove all power from outdoor sensor and clock 2 Press one of the buttons on the clock at least 20 times to clear all memory 3 Verify that the clock is blank before proceeding there may be lines painted on the screen that will show when there is no power 4 Leave both units without power for 15 minutes very important 5 Insert fresh batteries into the ...

Page 3: ...sue Low Outdoor temperature readings are power related or a sensor going bad The Outdoor sensor reads the environment where it is mounted When mounted inside the home it will read inside temperature When the Outdoor sensor reads high during the day but not at night it is a positioning problem Look for heat sources such as sunlight door or window frames or reflected heat Side by side test Place the...

Page 4: ...eplace Outdoor sensor Outdoor sensor drains batteries quickly Test a new set of alkaline batteries Write down the date of installation and the voltage of the batteries When the batteries fail please note the date and voltage again Check the distance and resistance between the Outdoor sensor and atomic clock Outdoor sensors at the end of the range may work while batteries are fresh but not after th...

Page 5: ...e range Outdoor sensors are water resistant not waterproof Indoor or Outdoor Mount Outdoor temperature sensor vertically Avoid more than one wall between the Outdoor sensor and the atomic clock The maximum transmitting range in open air is over 200 feet 60 meters Obstacles such as walls windows stucco concrete and large metal objects can reduce the range Do not mount near electrical wires transmit...

Page 6: ... the past 24 hours Reposition the digital clock with the front or back facing Colorado Check that the Time Zone selected correctly reflects your location Adjust the time zone in the Program Menu Check that the DST indicator is correct for your location most areas observe DST so this should be ON Adjust the DST indicator in the Program Menu Large buildings metal roofed buildings and buildings or ro...

Page 7: ...ates in the USA are considering keeping Daylight Saving Time all year long We are including an additional DST setting of DST ALWAYS ON DST ON Clock gains 1 hour in spring and loses 1 hour in the fall DST OFF Clock remains in Standard Time all year long DST ALWAYS ON Clock remains in Daylight Saving Time all year long Settings Menu Order Beep ON OFF Atomic ON OFF DST Daylight Saving Time o DST ON o...

Page 8: ...signal in the past 24 hours Position the digital clock for better reception Press and release the SET button to send the digital clock on a WWVB signal search at night Allow up to 5 nights to receive the time signal Timer A timer can be set from 1 minute minimum to 99 Minutes maximum 1 Hold the TIMER button for 2 seconds The Minutes will flash Press and release the or button to adjust the minutes ...

Page 9: ...nation On a brand new digital clock check for thin plastic film of printed scratch guard that may be on the screen of the digital clock This thin piece of plastic has printed numbers for store displays When the batteries are installed the real numbers show behind the printed scratch guard and create distortion With all power removed the digital clock should be blank If numbers still appear please ...

Page 10: ...em Check for leaking batteries which may damage the digital clock Digital clock has missing segments Explanation When parts of numbers letters or pictures are missing on the display it is often power related With all power removed the digital clock should be blank If numbers still appear please check for scratch guard Power Check that the batteries are installed correctly This is generally a power...

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