Introduzione
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. Configurazione iniziale
1.1 Ricarica dell'orologio (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.

Immagine 1: anteriore view of the Casio Pro Trek PRG-550-1A1 watch, showing the solar panel on the dial.
1.2 Impostazione della città e dell'ora di residenza
- In modalità cronometraggio, tenere premuto il tasto REGOLARE finché il codice della città non inizia a lampeggiare.
- Utilizzare il MODALITÀ E LEGGERO buttons to select your desired Home City code.
- Premere REGOLARE to confirm the city.
- Utilizzare il MODALITÀ 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 LEGGERO E MODALITÀ pulsanti.
- Premere REGOLARE per uscire dalla modalità di impostazione.
2. Modalità operative
L'orologio è dotato di molteplici modalità accessibili tramite MODALITÀ button and dedicated sensor buttons.
2.1 Modalità di cronometraggio
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 Pulsante)
Premere il tasto 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.

Immagine 2: Primo piano view highlighting the digital display and sensor buttons.
2.3 Barometer/Thermometer Mode (BARO Pulsante)
Premere il tasto 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 (ALTI Pulsante)
Premere il tasto ALTI 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 MODALITÀ Pulsante)
- Ora mondiale: Visualizza l'ora corrente in varie città principali del mondo.
- Cronometro: Misura il tempo trascorso, i tempi parziali e due arrivi.
- Timer: Una funzione di conto alla rovescia.
- Allarme: Imposta sveglie giornaliere.
3. Manutenzione
3.1 Ricarica
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 Resistenza all'acqua
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 Pulizia
Pulisci l'orologio con un panno morbido e asciutto. Per lo sporco ostinato, usa un panno morbido dampLavare con acqua e un detergente neutro delicato, quindi asciugare. Evitare l'uso di agenti volatili come diluenti o benzina, poiché potrebbero danneggiare i componenti in resina.

Immagine 3: posteriore view of the watch, displaying the "WR10BAR" water resistance marking.
4. Risoluzione Dei Problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Watch is not charging or display is blank. | Esposizione alla luce insufficiente. | Expose the watch face to bright light for an extended period. Ensure the solar panel is not obstructed. |
| L'ora non è corretta. | 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. |
| I pulsanti non rispondono. | 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. Specifiche
- Modello: Casio Pro Trek PRG-550-1A1
- Fonte di energia: Tough Solar (a energia solare)
- Resistenza all'acqua: 10 ATM (100 metri)
- Sensori:
- Digital Compass (Azimuth measurement)
- Barometer (Atmospheric pressure measurement)
- Altimeter (Altitude measurement)
- Thermometer (Temperature measurement)
- Cronometraggio: Analog and Digital display
- Funzioni aggiuntive: World Time, Stopwatch, Countdown Timer, 5 Daily Alarms, Hourly Time Signal, Battery Level Indicator, Full Auto LED Light with Afterglow.
6. Garanzia e supporto
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 websito. Conservare la prova d'acquisto per eventuali reclami in garanzia.
Casio ufficiale Websito: www.casio.com





