Sofirn SD11 Dive Light Instruction Manual

Introduction

The Sofirn SD11 is a high-performance dive light designed for various underwater activities, including photography, fishing, and general water work. It features a powerful 5000 lumen output, multiple light sources (3000K, 6500K, Mixed, and 660nm Red Light), a high Color Rendering Index (CRI 90) for accurate color representation, and an IPX8 waterproof rating for depths up to 100 meters. The light is equipped with a magnetic rotary switch for easy operation and a built-in USB-C port for convenient recharging.

The Sofirn SD11 Dive Light is designed for robust underwater performance, offering powerful illumination for divers.

What's in the Box

Please check the package contents upon receipt to ensure all items are present:

• Sofirn SD11 Flashlight
• USB-C Charging Cable
• Lanyard
• Spare O-Rings (x2)
• User Manual

The image displays the Sofirn SD11 flashlight, USB-C cable, O-rings, lanyard, and user manual included in the package.

Setup

1. Battery Charging

The Sofirn SD11 comes with a built-in 7500mAh rechargeable battery. Before first use, fully charge the device using the provided USB-C cable. Connect the USB-C cable to the charging port on the flashlight and to a compatible USB power source. The charging indicator will show the charging status:

• Red Light: Charging in progress.
• Green Light: Fully charged (approximately 3 hours).

2. Lanyard Attachment

Attach the anti-loss lanyard to the designated loop on the flashlight's tail cap. Ensure it is securely fastened to prevent accidental drops, especially during underwater use.

3. O-Ring Inspection

Before each dive, inspect the O-rings for any signs of damage, dirt, or debris. Ensure they are properly seated and lightly lubricated to maintain the IPX8 waterproof seal. Replace damaged O-rings with the provided spares.

The image shows the dimensions of the Sofirn SD11 and highlights its 7500mAh USB-C rechargeable battery with charging indicators.

Operating Instructions

Magnetic Rotary Switch Control

The Sofirn SD11 features a magnetic rotary switch for intuitive control of modes and brightness. This design is glove-friendly and secure.

• Rotate: Turn the knob to cycle through the different light modes (Cool White, Warm White, Red Light).
• Press: While in a mode, press the button to adjust the brightness levels (Low, Medium, High, Turbo).
• Lock Mode: To prevent accidental activation, engage the lock mode by pressing and holding the button for 3 seconds. Repeat to unlock.

This diagram shows how to rotate the switch to change modes, press to adjust brightness, and use the lock mode.

Light Modes

The SD11 offers four distinct light sources to suit various conditions:

• 3000K Warm White (CRI 90): Provides natural color restoration, ideal for underwater photography and observing marine life with accurate colors.
• 6500K Cool White: Offers long-range visibility and a bright, clear beam for general illumination.
• 5000K Neutral White (Mixed): A balanced white light suitable for general utility and industrial use.
• 660nm Red Light: Low-impact light for night diving, marine observation, and emergency signaling (steady or flashing).

The Sofirn SD11 features four distinct light sources to adapt to various underwater conditions.

CRI 90 ensures true underwater colors, enhancing the visual experience for marine life and photography.

Operational Flowchart

This flowchart illustrates how to navigate between Cool White, Warm White, and Red Light modes, and adjust brightness levels.

Constant Brightness Output

The SD11 maintains a constant brightness output without sudden dimming, providing safer and more predictable underwater lighting. The intelligent circuit ensures stable performance throughout the battery's discharge cycle.

The graph demonstrates the stable brightness output of the SD11 across various modes over time, preventing sudden dimming.

Maintenance

1. O-Ring Care

The SD11 features a dual O-ring sealing system for superior waterproofing. To ensure longevity and prevent leaks:

• Regularly inspect O-rings for cuts, cracks, or deformation.
• Clean O-rings and their grooves after each dive to remove salt, sand, or debris.
• Apply a thin layer of silicone grease to the O-rings periodically to keep them supple and maintain a good seal.
• Store the flashlight with the O-rings slightly loosened if not used for extended periods.

2. Cleaning

After each use, especially in saltwater, rinse the flashlight thoroughly with fresh water. Wipe it dry with a soft cloth. Do not use harsh chemicals or abrasive materials.

3. Storage

Store the dive light in a cool, dry place away from direct sunlight and extreme temperatures. If storing for an extended period, ensure the battery is partially charged (around 50%) and recharge every few months to prolong battery life.

The professional waterproof construction with dual O-rings and AL6061-T6 aluminum body ensures durability and corrosion resistance.

Troubleshooting

• Light not turning on:
    - Ensure the battery is charged. Connect to a USB-C charger and check the indicator light.
    - Check if the light is in lock mode. Press and hold the button to unlock.
    - Ensure the tail cap is fully tightened.
• Light output is dim or flickering:
    - The battery might be low. Recharge the flashlight.
    - Clean the battery contacts and the contact points inside the flashlight with a clean cloth.
    - Ensure O-rings are clean and properly seated.
• Water leakage:
    - Immediately rinse the flashlight with fresh water and dry it. Do not attempt to use it.
    - Inspect O-rings for damage or improper seating. Replace if necessary.
    - Ensure the tail cap is securely tightened.

Specifications

This table provides detailed performance specifications for each light mode, including lumens, runtime, and beam distance, along with physical dimensions.

Warranty

The Sofirn SD11 Dive Light comes with a 1-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, unauthorized modifications, accidents, or normal wear and tear. Please retain your proof of purchase for warranty claims.

Support

For further assistance, technical support, or warranty inquiries, please refer to the contact information provided with your purchase or visit the official Sofirn website. Our customer service team is available to help with any questions or concerns you may have regarding your SD11 Dive Light.