Introduction
This manual provides detailed instructions for the proper use and care of your Citizen Men's Eco-Drive Promaster Skyhawk A-T Watch, Model JY8149-05E. Please read this manual thoroughly to ensure optimal performance and longevity of your timepiece.
Figure 1: Front view of the Citizen Promaster Skyhawk A-T Watch (Model JY8149-05E).
Key Features
- Eco-Drive Technology: Powered by any light, eliminating the need for battery replacement.
- Atomic Timekeeping: Synchronizes with atomic clocks for superior accuracy, with time adjustment for 43 world cities.
- Perpetual Calendar: Automatically adjusts for month length and leap years, requiring no manual date changes.
- Chronograph: 1/100 second chronograph measures up to 24 hours.
- Dual Time (GMT): Displays a second time zone.
- Alarms: Two independent alarms.
- Countdown Timer: 99-minute countdown timer.
- Digital Backlight Display: For enhanced visibility in low light conditions.
- Power Reserve Indicator: Shows the current charge level of the watch.
- Sapphire Crystal: Scratch-resistant for enhanced durability.
- Water Resistance: Up to 200 meters (660 feet).
- Rotating Slide Rule Bezel: For aviation calculations.
Figure 2: Key features of the Promaster Skyhawk A-T Watch.
Setup
1. Initial Charge
Before initial use, ensure your Eco-Drive watch is fully charged. Expose the watch face to a bright light source (natural or artificial) for several hours. The power reserve indicator will show the charge level.
2. Atomic Time Synchronization
The watch automatically attempts to synchronize with the atomic time clock overnight for superior accuracy. For manual synchronization or to adjust time zones:
- Refer to the detailed instructions provided in the full user manual for specific button operations to initiate manual time synchronization.
- The watch supports time adjustment for 43 world cities.
- Daylight Saving Time (DST) adjustments are typically handled automatically. However, if issues arise, manual adjustment may be required.
3. Perpetual Calendar
The perpetual calendar feature automatically adjusts the date for different month lengths and leap years. No manual date adjustment is typically required.
Figure 3: Citizen Promaster Skyhawk A-T Watch in its protective case.
Video 1: Citizen Promaster Unboxing and initial overview. This video provides a general look at the watch and its packaging.
Operating Instructions
1. Chronograph Function
The watch features a 1/100 second chronograph capable of measuring up to 24 hours. Consult the full user manual for specific button sequences to start, stop, and reset the chronograph.
2. Dual Time (GMT)
Utilize the GMT function to display a second time zone. This is particularly useful for travelers or those communicating across different time zones.
3. Alarms and Countdown Timer
Set up to two independent alarms and use the 99-minute countdown timer as needed. Refer to the comprehensive manual for detailed instructions on setting these features.
4. Digital Backlight
Activate the digital backlight display for improved readability in dark environments.
5. Rotating Slide Rule Bezel
The rotating slide rule bezel can be used for various aviation-related calculations. Detailed usage instructions are available in the complete user guide.
Figure 4: Citizen Promaster Skyhawk A-T Watch on a wrist.
Video 2: Overview of the Promaster Skyhawk A-T watch features and operation, including time zone adjustments.
Maintenance
1. Eco-Drive Charging
Your Eco-Drive watch is powered by light. To maintain optimal performance, ensure regular exposure to light. Avoid prolonged storage in dark places. The power reserve indicator will help monitor the charge level.
2. Water Resistance
The watch is water resistant up to 200 meters (660 feet). This makes it suitable for swimming and snorkeling. Ensure the crown is pushed in completely before exposing the watch to water.
3. Cleaning and Care
Clean the watch regularly with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used. Avoid harsh chemicals or abrasive materials. The sapphire crystal is highly scratch-resistant but not entirely scratch-proof; handle with care.
Figure 5: Back view of the watch, highlighting the case back.
Troubleshooting
1. Time Synchronization Issues
If the watch experiences difficulty with over-air time synchronization or fails to update during time changes (e.g., Daylight Saving Time), ensure the watch battery is fully charged. A low power reserve can affect synchronization capabilities. Refer to the full manual for manual synchronization steps if automatic sync fails.
2. Power Reserve Depletion
If the watch stops or the power reserve indicator shows a low charge, expose the watch to a strong light source for an extended period. A full charge can take several hours depending on the light intensity.
Specifications
| Feature | Detail |
|---|---|
| Model Number | JY8149-05E |
| Movement | Eco-Drive U680 |
| Case Material | Stainless Steel |
| Strap Material | Leather (Black) |
| Crystal | Sapphire Crystal |
| Water Resistance | 200 meters (660 feet) |
| Functions | Atomic Timekeeping, Perpetual Calendar, Chronograph, Dual Time (GMT), 2 Alarms, Countdown Timer, Digital Backlight, Power Reserve Indicator, Rotating Slide Rule Bezel |
| Battery | 1 Lithium Ion battery (included, charged by light) |
| Dimensions | 6.18 x 5.08 x 4.02 inches; 1.15 Pounds (Package) |
Support
For further assistance, detailed user guides, or service inquiries, please visit the official Citizen Watch Group website or contact their customer support. Ensure you have your model number (JY8149-05E) ready when seeking support.
