1. Product Overview
The MEBUS Digital Radio Alarm Clock Model 56813 is a versatile timepiece designed for convenience and accuracy. It features automatic time synchronization via DCF 77 radio signal, an integrated thermometer, date display, and two independent alarm settings with a snooze function. The display includes a backlight for easy reading in low light conditions and a battery level indicator.
Image 1.1: Front view of the MEBUS Digital Radio Alarm Clock, displaying time, date, and temperature.
Key Features:
- DCF 77 Radio Control: Automatic time setting, including summer and winter time adjustments.
- Indoor Thermometer: Displays ambient temperature in °C or °F.
- Dual Alarms: Two independent alarm times with separate activation buttons.
- Snooze Function: 5-minute alarm repetition.
- Date and Weekday Display: Calendar function with weekday in 5 languages.
- Backlight: Blue backlight for visibility in the dark.
- 12/24 Hour Display: Selectable time format.
- Battery Level Indicator: Alerts when batteries are low.
2. Setup
2.1 Battery Installation
- Locate the battery compartment on the back of the alarm clock.
- Open the battery compartment cover.
- Insert two (2) 1.5V AAA batteries (not included), ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
The clock will automatically begin searching for the DCF 77 radio signal after battery insertion.
Image 2.1: Rear view of the alarm clock, highlighting the battery compartment and wall-mount option.
2.2 Initial Time Synchronization (DCF 77)
Upon battery insertion, the clock will automatically attempt to receive the DCF 77 radio signal to set the correct time. This process may take several minutes or even a few hours, depending on your location and environmental conditions. For optimal reception, place the clock near a window and away from electronic devices that may cause interference. It is recommended to allow the clock to search for the signal overnight.
Image 2.2: The alarm clock displaying the radio signal icon, indicating automatic time synchronization.
2.3 Manual Time Setting
If the radio signal is unavailable or unreliable, you can manually set the time. Refer to the 'MODE' button and '+' / '-' buttons on the front of the clock. Press and hold 'MODE' to enter setting mode, then use '+' and '-' to adjust values. Press 'MODE' again to confirm and move to the next setting.
3. Operating Instructions
3.1 Setting Alarms (Alarm 1 and Alarm 2)
The clock features two independent alarms. Use the dedicated 'ALARM 1 ON/OFF' and 'ALARM 2 ON/OFF' buttons located on the top of the clock to activate or deactivate each alarm. To set an alarm time:
- Press and hold the 'ALARM 1 SET' or 'ALARM 2 SET' button (located on the front, below the display) until the alarm hour flashes.
- Use the '+' or '-' buttons to adjust the hour.
- Press the 'ALARM SET' button again to confirm the hour and move to the minutes.
- Use the '+' or '-' buttons to adjust the minutes.
- Press the 'ALARM SET' button one last time to confirm and exit alarm setting mode.
Image 3.1: The alarm clock displaying two distinct alarm times (6:30 and 9:30).
3.2 Snooze Function
When an alarm sounds, press the large 'SNOOZE/LIGHT' button on the top of the clock to temporarily silence the alarm. The alarm will sound again after approximately 5 minutes.
3.3 Backlight Activation
Press the 'SNOOZE/LIGHT' button on the top of the clock to activate the blue backlight. This allows for easy reading of the display in dark environments. The backlight will remain on for a few seconds before automatically turning off.
Image 3.2: The alarm clock with its blue backlight illuminated, showing clear visibility in the dark.
3.4 Display Modes (12/24 Hour, °C/°F)
The clock allows you to switch between 12-hour and 24-hour time formats, and between Celsius (°C) and Fahrenheit (°F) for temperature display. Consult the full manual for specific button sequences, typically involving the 'MODE' button and '+' / '-' buttons.
Image 3.3: Overview of the alarm clock's display features, including temperature, dual alarms, and date.
4. Maintenance
4.1 Battery Replacement
When the battery level indicator appears on the display, it is time to replace the batteries. Follow the steps in Section 2.1 to replace the two (2) 1.5V AAA batteries. Always replace both batteries at the same time with new ones to ensure optimal performance.
4.2 Cleaning
To clean the alarm clock, use a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the casing or display. Avoid exposing the clock to excessive moisture.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Clock does not display time or functions. | Batteries are dead or incorrectly inserted. | Check battery polarity and replace with fresh AAA batteries. |
| Time is incorrect or not setting automatically. | Poor DCF 77 radio signal reception. | Move the clock to a location with better reception (e.g., near a window, away from electronics). Allow time for signal acquisition (up to 24 hours). Manually set the time if radio signal remains unavailable. |
| Alarm does not sound. | Alarm is not activated or set incorrectly. | Ensure the 'ALARM ON/OFF' button for the desired alarm is in the 'ON' position. Verify the alarm time is set correctly. |
| Display is dim or backlight is not working. | Low battery power. | Replace batteries. |
| Clock keeps jumping forward an hour. | Interference with radio signal or incorrect time zone setting. | Ensure the clock is in a location with clear radio signal reception. Check if there's a time zone adjustment feature and ensure it's set correctly for your region. If issues persist, try a manual time set. |
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | 56813 |
| Dimensions (L x W x H) | 3 x 8 x 9 cm |
| Weight | 120 grams |
| Power Source | 2 x 1.5V AAA batteries (not included) |
| Display Type | Digital |
| Special Features | Date display, Temperature display, Radio-controlled clock, Battery level indicator, Backlit display |
| Movement Type | Quartz |
| Material | Acrylonitrile Butadiene Styrene (Plastic) |
| Color | White |
| Indoor/Outdoor Use | Indoor |
Image 6.1: Front view of the alarm clock with its dimensions (8cm width, 9cm height).
7. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or contact your retailer. Keep your proof of purchase for any warranty claims.
