Marathon Slim Jumbo Atomic Digital Wall Clock

What's in the Box

The clock package includes the main unit and an outdoor remote sensor. Key components are identified as follows:

Front of the Clock

• A1: Radio-control icon ?
• A2: Time display
• A3: Indoor temperature
• A4: Date and weekday
• A5: Outdoor temperature
• A6: Radio frequency icon ?
• A7: CLOCK SET button
• A8: [down-arrow] button
• A9: [up-arrow] button

Back of the Clock

• B1: [bell] button
• B2: OUTDOOR TEMP SYNC button
• B3: °C/°F button
• B4: WAVE button
• B5: DST ON/OFF switch
• B6: TIME ZONE switch
• B7: RCC ON/OFF switch
• C1: Wall mount hole
• C2: Battery compartment
• C3: Stand

Battery Installation

Open the battery cover on the unit and insert 4 new AA batteries, observing the correct "+" and "-" polarity.

The unit can be placed on any flat surface using the built-in stand, or mounted on a wall using the wall mount at the back. For optimal automatic time setting, it is recommended to place the clock near a window or in a location with good radio-wave signal reception.

Low Battery Indication: The low battery icon ? will appear on the display when the batteries are low, indicating they should be replaced.

Outdoor Remote Sensor

The outdoor remote sensor is identified by the following parts:

• D1: Temperature display
• D2: Wall mount hole
• D3: RESET button
• D4: Battery compartment
• D5: Temperature probe connection

Clock Set Up

Automatic Clock Set Up: RCC WWVB Reception

Ensure the RCC switch is set to ON to enable automatic clock set up.

When the RC function is set to ON:

• Indicating excellent signal connection ?
• Indicating acceptable signal connection ?
• Indicating weak signal connection ?
• Indicating no signal connection ?

After powering up, if the RCC switch is ON, the clock will automatically synchronize with the WWVB radio wave signal. The Radio Control Icon ? will flash on the LCD.

You can manually scan for the time signal by holding the [button] for 3 seconds.

Reminder:

• Reception can take up to 10 minutes.
• If the signal is weak, it can take up to 24 hours to get a valid signal.
• The clock automatically synchronizes with the radio wave signal at 3:00 AM daily for accurate timing. If reception fails, the ? icon will disappear from the LCD.
• You can stop automatic synchronization by holding the [button] for 2 seconds.

Daylight Savings Mode

• Slide the DST switch to AUTO when the RCC function is ON and the clock is in an area where the RC-WWVB signal can be received. The DST icon will appear on the LCD during daylight saving time.
• Slide the DST switch to OFF to disable Daylight Savings Mode.
• Slide the DST switch to ON to automatically change the time to daylight saving time, regardless of the RCC function status.

Time Zone

Slide the TIME ZONE switch to select the desired time zone. Eight time zones are available:

• Hawaii = HST
• Alaskan = AKST
• Pacific = PST
• Mountain = MST
• Central = CST
• Eastern = EST
• Atlantic = AST
• Newfoundland = NST

Manual Clock Set Up: RCC function is set to OFF

Steps:

1. Press the CLOCK SET button to toggle between year and time display.
2. To enter Clock Set Up: Hold the CLOCK SET button for 3 seconds, or until you hear a beep. Use the [up-arrow] or [down-arrow] buttons to speed up digit cycling.
3. Default = 12/24 HOUR FORMAT: Press the [up-arrow] or [down-arrow] button to select 12 or 24-hour display.
4. Press 1x = SET HOUR: Press the [up-arrow] or [down-arrow] button to set the hours.
5. Press 2x = SET MINUTE: Press the [up-arrow] or [down-arrow] button to set the minutes.
6. Press 3x = SET SECONDS: Press the [up-arrow] or [down-arrow] button to reset seconds to zero.
7. Press 4x = SET YEAR: Press the [up-arrow] or [down-arrow] button to set the year.
8. Press 5x = SET MONTH: Press the [up-arrow] or [down-arrow] button to select the desired month.
9. Press 6x = SET DAY: Press the [up-arrow] or [down-arrow] button to set the date.
10. Press 7x = SET LANGUAGE OF WEEKDAY DISPLAY: Press the [up-arrow] or [down-arrow] button to select the desired language (ENGLISH (default) / FRENCH / SPANISH).
11. Press 8x = SET ICE ALARM FUNCTION: Press the [up-arrow] or [down-arrow] button to toggle between ON or OFF. If the ice alert function is ON and the outdoor temperature is between -2°C and +3°C, the ❄️ icon is shown on the display.
12. Press 9x = EXIT CLOCK SETUP MODE: The clock will automatically exit setup mode if no button is pressed for 15 seconds.

Outdoor Remote Sensor

Temperature

Upon powering up, the outdoor remote sensor immediately sends the temperature RF signal to the main unit. The main unit attempts to search for this signal for five minutes after powering up (or after pressing the RESET button). If the signal is not received within the first five minutes, press and hold the OUTDOOR TEMP SYNC button on the main unit to search for the remote temperature. The clock will search for an additional six minutes.

Losing Synchronization of the Outdoor Remote Sensor

If the main unit has received the remote temperature but now displays a blank value (--.-), synchronization may have been lost. To re-establish synchronization, press and hold the OUTDOOR TEMP SYNC button on the main unit. The main unit will attempt to receive the outdoor temperature for six minutes. If the remote temperature cannot be received, check the following:

1. Ensure the distance between the main unit and the outdoor remote sensor is at least 0.9 m to 1.2 m (3 to 4 feet) and away from interference sources like computer monitors or televisions.
2. Check if the main unit is located near metal window frames.

Refrigerator Thermometer Probe

An optional refrigerator thermometer probe (D8) can be connected to the outdoor remote sensor. This probe is designed for measuring temperatures outside the standard range of the outdoor sensor, specifically below -20°C (-4°F) or above 50°C (122°F). For instance, the sensor can be used indoors with the probe placed outdoors, or the probe can be used for measuring temperatures inside a refrigerator or wine cellar. When the refrigerator thermometer probe is connected, the main unit will display only the probe's reading.

Installing the Refrigerator Thermometer Probe

Insert the temperature probe connection into the jack on the right-hand side of the outdoor remote sensor.

Place the probe's end in the desired location and position the outdoor remote sensor in a compatible location, considering its temperature limitations.

Alarm Set Up

Steps

1. To enter Alarm Set Up: Hold the [alarm-button] for 3 seconds, or until you hear a beep. Use the [up-arrow] or [down-arrow] buttons to speed up digit cycling.
2. Default = SET HOUR: Press the [up-arrow] or [down-arrow] button to set the hours.
3. Press 1x = SET MINUTE: Press the [up-arrow] or [down-arrow] button to set the minutes.
4. Press 2x = EXIT ALARM SETUP MODE: The clock will automatically exit setup mode if no button is pressed for 15 seconds.

Alarm Activation and Deactivation

Press the [alarm-button] to activate or deactivate the alarm. When activated, the alarm icon ⏰ will appear on the display, and the alarm time will be shown for 3 seconds.

To stop the alarm, press any button. Otherwise, the alarm will sound for approximately 2 minutes before stopping.

Thermometer

• Press the °C/°F button to set the temperature in Celsius or Fahrenheit.
• If the temperature is outside the measurable range, LL.L (below minimum) or HH.H (above maximum) will be displayed on the LCD.

Note: The clock may not function correctly if the temperature exceeds 50°C.

Specifications

Precautions

• The clock loses its time information when the battery is removed.
• Do not subject the clock to excessive force or shock.
• Do not expose the clock to extreme temperatures, direct sunlight, dust, or moisture.
• Avoid contact with corrosive materials. Do not clean the device using abrasive or corrosive materials or products, as abrasive cleaning agents may scratch plastic parts and corrode electronic circuits.
• Do not tamper with any internal components of this clock, as this may cause damage.

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 into 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.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

IC Statement

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada's licence-exempt RSS(s). Operation is subject to the following two conditions: (1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause undesired operation of the device.

L'émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d'Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) L'appareil ne doit pas produire de brouillage; (2) L'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.