1. Introduktion
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. Pakkens indhold
- MARATHON CL030068 Atomic Wall Clock
- AA Alkaline Batteries (included)
- Brugervejledning (dette dokument)
3. Opsætning
3.1 Batteriinstallation
- Find batterirummet på bagsiden af uret.
- Insert the included AA batteries, ensuring correct polarity (+ and -).
- Luk batterirummets dæksel.
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.
- Tidszone: 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.
- Signalmodtagelse: 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. Betjeningsvejledning
4.1 Skærmtilstande
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:
- Tidsvisning: Choose between AM/PM or 24-hour format.
- Datovisning: Shows the month, weekday, and date.
- Temperaturvisning: Displays the indoor room temperature in Celsius or Fahrenheit. Use the ‘C/F’ button to switch between units.

Billede 4.1: Et nærbillede view of the clock's dynamic display, showing time, date, day, and temperature.
4.2 Manuel tidsindstilling
In the event that the atomic signal cannot be received, or if you wish to set the time manually, follow these steps:
- Tryk på knappen 'SET' (eller lignende), og hold den nede, indtil tidsdisplayet begynder at blinke.
- Use the '+' or '-' buttons to adjust the hour, then press 'SET' to confirm.
- Gentag for minutter, år, måned og dag.
- Press 'SET' one last time to exit manual setting mode.
5. Funktioner overview
- Self-Setting and Self-Adjusting: Automatically synchronizes with the NIST atomic clock signal for accurate time, including Daylight Saving Time adjustments.
- Stort display: Features a 9-inch display with large 4-inch digits for easy readability from a distance.
- Flere visningstilstande: 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.
- Alsidig placering: 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. Montering og placering
6.1 Vægmontering
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 Bordpladeplacering
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. Vedligeholdelse
7.1 Udskiftning af batteri
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 Rengøring
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. Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Uret viser ingenting. | Batterierne er døde eller forkert installeret. | Kontroller batteripolariteten. Udskift med nye AA-batterier. |
| Clock does not synchronize with atomic signal. | Dårlig signalmodtagelse på grund af placering eller interferens. | 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. |
| Forkert tidspunkt vist. | Incorrect time zone selected or atomic signal not received. | Verify the correct time zone is selected. Attempt to resynchronize or manually set the time. |
| Temperaturaflæsningen er unøjagtig. | Clock placed near a heat source or vent. | Relocate the clock to an area with stable ambient temperature. |
9. Specifikationer
| Feature | Detalje |
|---|---|
| Modelnummer | CL030068 |
| Mærke | MARATHON |
| Display Type | Digital |
| Farve | Black Frame with Steel Inset |
| Produktdimensioner | 24 x 3.81 x 16 cm (9.4 x 1.5 x 6.3 tommer) |
| Varens vægt | 558 g (1.23 lbs) |
| Strømkilde | AA-batterier (medfølger) |
| Særlige funktioner | Atomic Time Synchronization, Calendar Display, Temperature Display |
| Tidszoner | 8 North American Time Zones |

Image 9.1: Dimensions of the MARATHON CL030068 Atomic Wall Clock.
10. Garanti og support
For garantioplysninger og kundesupport henvises til producentens officielle webwebstedet eller kontakt deres kundeserviceafdeling. Behold din købskvittering som købsbevis.

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





