1. Úvod
This manual provides detailed instructions for the MARATHON CL030068 Atomic Wall Clock. This clock is designed to automatically synchronize with the NIST radio signal for precise timekeeping, and it displays time, date, day of the week, and indoor temperature.

Image 1.1: The MARATHON CL030068 Atomic Wall Clock, showcasing its large digital display and sleek design.
2. Obsah balení
- MARATHON CL030068 Atomic Wall Clock
- AA Alkaline Batteries (included)
- Uživatelská příručka (tento dokument)
3. Nastavení
3.1 Instalace baterie
- Najděte přihrádku na baterie na zadní straně hodin.
- Insert the included AA batteries, ensuring correct polarity (+ and -).
- Zavřete kryt prostoru pro baterie.
3.2 Initial Synchronization and Time Zone Selection
Upon battery insertion, the clock will automatically begin searching for the NIST atomic time signal. This process may take several minutes to several hours, depending on your location and signal strength. The atomic time signal is broadcast from Colorado, USA, and is primarily effective in North America.
- Časové pásmo: Locate the time zone switch or button on the back of the clock. Select your appropriate North American time zone: Pacific, Mountain, Central, Eastern, Atlantic, Newfoundland, Alaska, or Hawaii.
- Příjem signálu: For optimal signal reception, place the clock near a window, away from electronic devices that may cause interference. The signal is often strongest during nighttime hours.

Image 3.1: The atomic wall clock mounted on a wall, demonstrating its suitability for various environments.
4. Návod k obsluze
4.1 Režimy zobrazení
The clock offers multiple display modes. Use the 'MODE' button (if available) or refer to specific buttons on the back of your clock to cycle through the following displays:
- Zobrazení času: Choose between AM/PM or 24-hour format.
- Zobrazení data: Shows the month, weekday, and date.
- Zobrazení teploty: Displays the indoor room temperature in Celsius or Fahrenheit. Use the ‘C/F’ button to switch between units.

Obrázek 4.1: Detailní záběr view of the clock's dynamic display, showing time, date, day, and temperature.
4.2 Ruční nastavení času
In the event that the atomic signal cannot be received, or if you wish to set the time manually, follow these steps:
- Press and hold the 'SET' button (or similar) until the time display begins to flash.
- Use the '+' or '-' buttons to adjust the hour, then press 'SET' to confirm.
- Opakujte pro minuty, rok, měsíc a den.
- Press 'SET' one last time to exit manual setting mode.
5. Funkce Overview
- Self-Setting and Self-Adjusting: Automatically synchronizes with the NIST atomic clock signal for accurate time, including Daylight Saving Time adjustments.
- Velký displej: Features a 9-inch display with large 4-inch digits for easy readability from a distance.
- Více režimů zobrazení: Provides options for AM/PM or 24-hour time, full date (month, weekday, date), and indoor temperature in Celsius or Fahrenheit.
- Eight North American Time Zones: Supports Pacific, Mountain, Central, Eastern, Atlantic, Newfoundland, Alaska, and Hawaii standard times.
- Všestranné umístění: Designed for both wall mounting and tabletop use with a sturdy fold-out stand.

Image 5.1: Key features of the clock, including its self-setting capability, versatile placement options, and sleek design.
6. Montáž a umístění
6.1 Montáž na stěnu
The clock features a keyhole slot on the back for easy wall mounting. Ensure the wall is suitable for supporting the clock's weight (approximately 558g).
6.2 Umístění na stůl
Utilize the integrated fold-out stand on the back of the clock to place it securely on any flat surface, such as a desk, shelf, or table.
6.3 Optimal Signal Reception
For best atomic signal reception, position the clock:
- Near a window.
- Away from large metal objects or electronic devices that may cause interference (e.g., televisions, computers, microwaves).
- In an area with minimal structural obstructions.

Image 6.1: The clock displayed in a home environment, illustrating its ease of placement and clear visibility.
7. Údržba
7.1 Výměna baterie
When the display dims or becomes erratic, it is time to replace the batteries. Always replace all batteries at the same time with new, high-quality AA alkaline batteries. Do not mix old and new batteries or different types of batteries.
7.2 Čištění
To clean the clock, use a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these may damage the display or casing.
8. Řešení problémů
| Problém | Možná příčina | Řešení |
|---|---|---|
| Clock does not display anything. | Baterie jsou vybité nebo nesprávně nainstalované. | Zkontrolujte polaritu baterií. Vyměňte za nové baterie typu AA. |
| Clock does not synchronize with atomic signal. | Poor signal reception due to location or interference. | Move the clock to a different location, preferably near a window and away from electronics. Allow several hours, especially overnight, for synchronization. Manually set the time if necessary. |
| Incorrect time displayed. | Incorrect time zone selected or atomic signal not received. | Verify the correct time zone is selected. Attempt to resynchronize or manually set the time. |
| Odečet teploty je nepřesný. | Hodiny umístěné v blízkosti zdroje tepla nebo větracího otvoru. | Relocate the clock to an area with stable ambient temperature. |
9. Specifikace
| Funkce | Detail |
|---|---|
| Číslo modelu | CL030068 |
| Značka | MARATHON |
| Typ zobrazení | Digitální |
| Barva | Black Frame with Steel Inset |
| Rozměry produktu | 24 x 3.81 x 16 cm (9.4 x 1.5 x 6.3 palce) |
| Hmotnost položky | 558 g (1.23 lb) |
| Zdroj napájení | AA baterie (součástí balení) |
| Speciální funkce | Atomic Time Synchronization, Calendar Display, Temperature Display |
| Časová pásma | 8 North American Time Zones |

Image 9.1: Dimensions of the MARATHON CL030068 Atomic Wall Clock.
10. Záruka a podpora
Informace o záruce a zákaznické podpoře získáte od oficiálního webnebo kontaktujte jejich zákaznický servis. Uschovejte si účtenku jako doklad o koupi.

Image 10.1: The MARATHON brand logo and a brief historical note about the company.





