Einführung
This manual provides detailed instructions for the operation and maintenance of your Casio Pro Trek PRG-550-1A1 Tough Solar watch. Please read this manual carefully to ensure proper use and to fully utilize its advanced features, including digital compass, altimeter, barometer, and thermometer functions.
1. Ersteinrichtung
1.1 Aufladen der Uhr (Tough Solar)
Your watch is equipped with a solar charging system. Before initial use, expose the watch face to bright light for several hours to ensure it is sufficiently charged. Avoid covering the watch face during charging. A low battery indicator may appear if the charge is insufficient.

Bild 1: Vorderseite view of the Casio Pro Trek PRG-550-1A1 watch, showing the solar panel on the dial.
1.2 Festlegung der Heimatstadt und der Zeit
- Im Zeitmessmodus die Taste gedrückt halten ANPASSEN button until the city code starts to flash.
- Verwenden Sie die MODUS Und LICHT Schaltflächen zur Auswahl Ihres gewünschten Heimatstadt-Codes.
- Drücken ANPASSEN to confirm the city.
- Verwenden Sie die MODUS button to cycle through other settings like DST (Daylight Saving Time), 12/24-hour format, seconds, hour, minute, year, month, and day. Adjust each setting using the LICHT Und MODUS Schaltflächen.
- Drücken ANPASSEN , um den Einstellmodus zu verlassen.
2. Betriebsarten
Die Uhr verfügt über mehrere Modi, die über die MODUS button and dedicated sensor buttons.
2.1 Zeitmessmodus
This is the default mode, displaying the current time, day, and date. The analog hands show the current time, while the digital display can show various information depending on settings.
2.2 Digital Compass Mode (COMP Taste)
Drücken Sie die COMP button to enter Compass Mode. The watch will display the current bearing (north, south, east, west) and a graphic representation of the direction. For accurate readings, ensure the watch is held level and away from strong magnetic fields.

Bild 2: Nahaufnahme view highlighting the digital display and sensor buttons.
2.3 Barometer/Thermometer Mode (BARO Taste)
Drücken Sie die BARO button to display atmospheric pressure and temperature. Temperature readings are most accurate when the watch is removed from the wrist for at least 20-30 minutes to avoid body heat interference.
2.4 Altimeter Mode (HÖHE Taste)
Drücken Sie die HÖHE button to measure altitude. The altimeter uses a pressure sensor, so readings can be affected by changes in atmospheric pressure due to weather. For best accuracy, calibrate the altimeter frequently using a known altitude reference.
2.5 Other Modes (via MODUS Taste)
- Weltzeit: Displays the current time in various major cities around the world.
- Stoppuhr: Misst die verstrichene Zeit, Zwischenzeiten und zwei Zielankünfte.
- Timer: Eine Countdown-Timer-Funktion.
- Alarm: Stellen Sie tägliche Alarme ein.
3. Wartung
3.1 Laden
To maintain optimal performance, ensure the watch is regularly exposed to light for charging. Prolonged storage in darkness can deplete the battery and affect functionality. Refer to the power indicator on the digital display to monitor charge level.
3.2 Wasserbeständigkeit
The PRG-550-1A1 is water resistant to 10 ATM (100 meters). This means it is suitable for swimming and snorkeling. Do not operate buttons while the watch is submerged in water. Avoid exposing the watch to hot water or steam, as this can compromise the seals.
3.3 Reinigung
Reinigen Sie die Uhr mit einem weichen, trockenen Tuch. Bei hartnäckigem Schmutz verwenden Sie ein weiches Tuch.ampMit Wasser und einem milden, neutralen Reinigungsmittel abspülen und anschließend trocken wischen. Vermeiden Sie die Verwendung flüchtiger Substanzen wie Verdünner oder Benzin, da diese die Harzkomponenten beschädigen können.

Bild 3: Hinten view of the watch, displaying the "WR10BAR" water resistance marking.
4. Fehlerbehebung
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Watch is not charging or display is blank. | Unzureichende Lichteinwirkung. | Expose the watch face to bright light for an extended period. Ensure the solar panel is not obstructed. |
| Die Uhrzeit ist falsch. | Incorrect Home City setting or manual time adjustment error. | Re-set your Home City and manually adjust the time as described in Section 1.2. |
| Sensor readings (compass, altimeter, barometer) are inaccurate. | Interference from magnetic fields, rapid weather changes, or need for calibration. | Move away from electronic devices or metal objects. Calibrate the sensor according to the specific mode's instructions. For altimeter, calibrate with a known altitude. |
| Tasten reagieren nicht. | Watch may be in a locked state or battery is extremely low. | Ensure the watch is adequately charged. If submerged, do not press buttons. If problem persists, perform a full reset (refer to Casio support for specific reset procedures). |
5. Spezifikationen
- Modell: Casio Pro Trek PRG-550-1A1
- Energiequelle: Robustes Solar (Solarbetrieben)
- Wasserbeständigkeit: 10 ATM (100 Meter)
- Sensoren:
- Digital Compass (Azimuth measurement)
- Barometer (Atmospheric pressure measurement)
- Altimeter (Altitude measurement)
- Thermometer (Temperature measurement)
- Zeitmessung: Analog and Digital display
- Zusätzliche Funktionen: Weltzeit, Stoppuhr, Countdown-Timer, 5 tägliche Alarme, Hourly Time Signal, Battery Level Indicator, Full Auto LED Light with Afterglow.
6. Garantie und Support
For warranty information, please refer to the warranty card included with your purchase. In case of issues not covered by this manual, or for service and repair, please contact your authorized Casio dealer or visit the official Casio support webBewahren Sie Ihren Kaufbeleg für Garantieansprüche auf.
Offizielles Casio WebWebsite: www.casio.com





