Citizen CB5925-82X
Citizen Men's Chronograph Eco-Drive Watch Promaster Sky User Manual
Model: CB5925-82X
Introduction
Welcome to the user manual for your new Citizen Men's Chronograph Eco-Drive Watch Promaster Sky. This timepiece combines advanced Eco-Drive technology, which converts any light into energy, with radio-controlled timekeeping for unparalleled accuracy. This manual provides essential information on setting up, operating, maintaining, and troubleshooting your watch to ensure optimal performance and longevity.
Product Overview
Key Features
- GENTS ECO-DRIVE PROMASTER: Designed for men, part of the Promaster series.
- WATER RESISTANT TO 200 M: Suitable for professional marine activity and serious surface water sports, but not scuba diving.
- LIGHT POWERED ECO-DRIVE: Converts any light into energy, stored in a rechargeable power cell, eliminating the need for battery changes.
- UK APPROVED SUPPLIER: Comes with a 5-year Citizen UK warranty.
Components and Views

Front View: Displays the main dial, chronograph subdials, date window, and prominent hour markers. The watch features a black case and bracelet with a distinctive green dial.

Case Back: The reverse side of the watch, typically engraved with model information and water resistance details.

Side View: Illustrates the watch's profile, including the crown for time adjustment and pushers for chronograph functions.

Angled View: Provides a dynamic perspective of the watch, showcasing the dial's depth and the case's finish.

Lume Shot: Demonstrates the watch's luminous hands and markers, providing visibility in low-light conditions.

Bracelet Detail: A close-up of the watch's black metal bracelet, showing its construction and finish.

On Wrist: Shows the watch's size and appearance when worn on a wrist.

Packaging: The standard black box packaging for the Citizen watch.
Setup
Initial Charge
Your Eco-Drive watch is powered by light. Before initial use, or if the watch has stopped, ensure it is fully charged. Expose the watch dial to bright light (natural sunlight is ideal) for several hours. A full charge can take up to 11 hours under direct sunlight or significantly longer under indoor lighting. Avoid placing the watch in direct sunlight on a car dashboard or other places where it may become extremely hot.

Eco-Drive Mechanism: Illustrates how light is absorbed through the dial and converted into electrical energy.

Light to Energy: Visual representation of the light conversion process.

Energy Storage: Depicts the internal power cell where converted energy is stored.

Continuous Recharging: Highlights the watch's ability to recharge continuously in any light.
Time Synchronization (Radio-Controlled)
Your Promaster Sky watch is radio-controlled, meaning it automatically receives time signals to maintain precise time. The watch attempts to receive a signal daily, typically overnight. For best reception, place the watch near a window, away from electronic devices that may cause interference.
- Automatic Reception: The watch will attempt to synchronize automatically.
- Manual Reception: Refer to the detailed instructions in the full manual for initiating manual time signal reception if needed.
- Reception Conditions: Signal strength can vary based on location, weather, and proximity to signal towers.

Satellite Wave Technology: Illustrates the watch's capability to receive time signals for accurate timekeeping.
Adjusting the Bracelet
The metal bracelet can be adjusted for a comfortable fit. It is highly recommended to have this adjustment performed by a qualified jeweler or an authorized Citizen service center to prevent damage to the bracelet or watch.
Operating Instructions
Basic Timekeeping
Once charged and synchronized, your watch will display the current time and date. The main hands indicate hours, minutes, and seconds. The date is displayed in the date window.
Chronograph Function
The chronograph allows for precise timing of events.
- Start/Stop: Press the upper pusher (A) to start and stop the chronograph.
- Reset: Press the lower pusher (B) to reset the chronograph to zero after stopping.
Alarm Function
Your watch is equipped with an alarm function.
- Setting the Alarm: Use the crown and/or pushers to set the desired alarm time. Refer to the full instruction manual for specific steps.
- Activating/Deactivating: The alarm can be turned on or off as needed.
World Time Function
The Promaster Sky series often includes a world time function, allowing you to easily switch between different time zones.
- Selecting Time Zones: Rotate the crown or use specific pushers to select a city or time zone.
- Home/Local Time Swap: Some models allow for quick swapping between home and local time displays.
Water Resistance
This watch is water resistant to 200 meters (20 BAR). This rating makes it suitable for showering, swimming, and snorkeling. It is not designed for scuba diving. Ensure the crown is pushed in completely before exposing the watch to water.
Maintenance
Cleaning
Regularly wipe your watch with a soft, dry cloth to remove dust and dirt. For metal bracelets and water-resistant cases, a slightly damp cloth can be used, followed by drying. Avoid using harsh chemicals or abrasive materials.
Charging Guidelines
To maintain optimal performance, ensure your Eco-Drive watch receives regular exposure to light. If stored in darkness for extended periods, the power reserve will deplete. Periodically expose it to bright light to recharge.
Storage
When storing the watch for long periods, place it in an area where it can receive some light, or ensure it is fully charged before storage. Avoid extreme temperatures and high humidity.
Service and Repair
For any service, repair, or battery replacement (though Eco-Drive watches do not require traditional battery changes, the rechargeable cell may eventually need service after many years), always contact an authorized Citizen service center. Unauthorized repairs can void your warranty and potentially damage the watch.
Troubleshooting
Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Watch has stopped or hands are not moving. | Insufficient charge. | Expose the watch to bright light for several hours to recharge. |
| Time is incorrect despite being radio-controlled. | Failed time signal reception or interference. | Place the watch near a window overnight for automatic reception. If unsuccessful, attempt manual reception (refer to full manual). Ensure no strong electronic interference nearby. |
| Chronograph hands do not reset to zero. | Needs calibration or reset. | Perform a chronograph zero-reset procedure. Refer to the full instruction manual for detailed steps. |
| Date is incorrect. | Manual adjustment needed after months with fewer than 31 days, or incorrect time zone setting. | Manually adjust the date. Ensure the correct time zone is set if using world time function. |
If you encounter issues not listed here or if solutions do not resolve the problem, please contact Citizen customer support or an authorized service center.
Specifications
| Feature | Detail |
|---|---|
| Model Number | CB5925-82X |
| Movement | Eco-Drive (Light Powered) |
| Water Resistance | 200 meters (20 BAR) |
| Crystal Type | Sapphire Glass |
| Functions | Chronograph, Alarm, World Time, Radio-Controlled Timekeeping, Date Display, Power Reserve Indicator |
| Case Material | Stainless Steel with Black PVD Coating |
| Band Material | Stainless Steel with Black PVD Coating |
| Battery Type | 1 Lithium Metal (included, rechargeable) |
| Package Dimensions | 27.6 x 10.8 x 10.4 cm |
| Item Weight | 181 g |
| Manufacturer | Citizen Watch |
| First Available | 15 March 2023 |
Warranty and Support
Warranty Information
Your Citizen Promaster Sky watch comes with a 5-year Citizen UK warranty. This warranty covers manufacturing defects under normal use. Please retain your proof of purchase for warranty claims.
Customer Support
For detailed operational instructions, warranty service, or any other inquiries, please visit the official Citizen Watch UK website or contact their customer support directly. Always ensure you are dealing with authorized service providers for genuine parts and reliable service.
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