Marathon CL030027 Instruction Manual

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ATOMIC WALL CLOCK with REMOTE TEMPERATURE SENSOR

Model CL030027

Instruction Manual

Congratulations on purchasing your ATOMIC CLOCK with REMOTE TEMPERATURE SENSOR. Please read these
instructions carefully and store them in a safe place for future reference.

FEATURES

 Super Accurate Atomic Time using the WWVB

Radio Signal from the Atomic Clock in Colorado,
USA

 Alarm/Snooze function
 Optional 12 Hour or 24 Hour Time Display
 Four Time Zone Settings: Pacific, Mountain,

Central and Eastern

 Automatic adjustment for Daylight Savings Time

in the Spring and Fall

 Indoor thermometer and 434MHZ wireless

outdoor temperature sensor. No wire installation is required.

 Works with up to 3 remote temperature sensors (one remote sensor is included with the clock). Additional wireless

remote sensors available separately.

 Displays Indoor/Outdoor Temperature in Celsius or Fahrenheit
 Indoor and outdoor temperature trends
 Low battery indicator

IMPORTANT: The wireless remote temperature sensor must have batteries installed before installing batteries
in the main unit.

REMOTE WIRELESS TEMPERATURE SENSOR
Inserting batteries

The remote unit uses two “AAA” batteries. To install or replace the batteries, please follow these steps:

1. Remove kickstand base.

2. Unscrew the 4 screws on the back of the compartment and remove the cover.

3. Insert the batteries observing the correct polarity.

4. Replace the battery cover on the unit and seal by re-screwing firmly.

5. When a “Low Battery” symbol appears on the LCD screen in the Outdoor Temperature section, please replace

the batteries of the remote unit.

6. In some instances, the LCD display might be abnormal after new batteries are installed. If this happens, remove and

reinstall the batteries until the display is normal.

7. After installation of the new batteries, the setup procedures need to be performed. (See Setting the remote

transmitter(s))

Setting the remote transmitter(s)

1. There are 2 buttons inside the back of the remote sensor unit.

2

1) OC/OF---A multifunction button that is used to either change the house code and channel number of the remote, or

change the remote displays between Centigrade or Fahrenheit

2) SET---To confirm the change of house code

2. After inserting the batteries, House Code will be flashing with “01”. Press OC/OF button to change the House Code.

3. The range of House Code is from “01” to “30”. Make sure all other transmitters in your system are set to the same

House Code.

4. When you have a new house code shown that you wish to use, press and hold the SET button and the channel

number will start to flash. Also if no buttons are pressed for 10 seconds, the channel Number will also start to flash.

5. Use the OC/OF button to select a different Channel Number (1-3) for each of your transmitters.

6. The Channel Number will be confirmed if SET button is pressed, or if no button is pressed for 10 seconds.

7. After setting, please do not change the House code or Channel Number again. Otherwise the Learn procedure of the

receiver needs to be repeated again.

Operation

1. Pressing OC/OF button will select the unit of temperature displayed between OC and OF.

2. After setting, the current temperature will be displayed. For the remote, the temperature reading will be displayed.

3. The data will also be transmitted to the receiver on the main unit regularly. During transmission, the “Antenna”

symbol on the LCD panel and the red LED will flash.

MAIN UNIT

The main unit uses two “AA” batteries. To install or replace the batteries, please follow these steps:

1) Remove the battery compartment cover.

2) Replace the old batteries with the same type of new batteries (size: “AA x 2). Notice the correct polarity of the

battery.

3) Replace the battery compartment cover.
NOTE: The LCD display might be abnormal (segments missing) or there might be a button malfunction because of
potential magnetic interference. In this case, remove and then reload the batteries until the LCD display and button
function is ok.

First reception after power-up
NOTE: THE TIME CANNOT BE SET MANUALLY FOR THE FIRST FIFTEEN MINUTES WHEN THE
CLOCK IS POWERED UP.

1) After installing batteries, the LCD will display and a beep will sound. The Temperature, Time and Date are shown

in the display.

2) At the same time, all channels of the Radio Frequency (RF) reception will register and this will last four minutes,

with the channel code flashing. When a channel is received, the channel code and its data will appear in the display.
At the same time the user code will be recorded. Every time the RF signal is received successfully, the antenna
symbol will flash. (Ensure that batteries are placed in the remote sensor before placing them in the clock.)

3) Then the clock will start to search for the WWVB time signal from the Atomic Clock.

4) Under optimal conditions, the correct time can be displayed within 3 to 15 minutes. If after 15 minutes the signal

has not been received, use MODE/ALM SET button to set the time manually (see Setting Time instructions
below).

5) Once the signal is received, the wave will display, and the clock will automatically reset the time to the correct