Jonard VFL-150 Visual Fault Locator Kit with LC Adapter
The Jonard VFL-150 Visual Fault Locator Kit helps technicians detect fiber breakpoints, leaks, poor connections and stress points in fiber optic cables over distances up to 5 km. Its 650 nm visible laser supports FC, SC and ST connectors, while the included FC-to-LC adapter adds compatibility with LC connectors. Powered by two AAA batteries and offering up to 60 hours of operation, this compact Jonard kit is ideal for field installation and troubleshooting.
Download the Jonard OFI-100 Advanced Optical Fiber Identifier w/ Power Meter & VFL Specification Sheet (PDF)Jonard VFL-150 Visual Fault Locator Kit with LC Adapter
The Jonard VFL-150 Visual Fault Locator Kit provides fiber optic technicians with a compact and convenient tool for detecting fiber breakpoints, light leaks, poor connections and stress points. Its visible 650 nm laser output helps identify the location of certain faults in compatible fiber optic cables over distances of up to 5 km.
The VFL-150 combines the Jonard VFL-25 visual fault locator with the VFL-25125 FC-to-LC adapter. The visual fault locator supports FC, SC and ST connector interfaces, while the included adapter extends compatibility to LC connectors. This combination makes the kit suitable for working with several widely used fiber optic connector formats.
Powered by two AAA batteries, the visual fault locator offers a stated operating time of up to 60 hours. Its lightweight handheld construction makes it practical for fiber installation, continuity testing, network maintenance and field troubleshooting.
Features and Benefits of the Jonard VFL-150 Visual Fault Locator Kit
- Helps detect breakpoints in compatible fiber optic cables.
- Identifies certain light leaks, poor connections and stress points.
- Provides visible 650 nm laser output for fiber troubleshooting.
- Supports test distances of up to 5 km.
- Works directly with FC, SC and ST fiber connector interfaces.
- Included FC-to-LC adapter adds compatibility with LC connectors.
- Compact and lightweight design supports convenient field use.
- Powered by two commonly available AAA batteries.
- Provides up to 60 hours of stated battery operation.
- Suitable for installation, maintenance and fiber continuity testing.
- Wide operating and storage temperature ranges support varied environments.
Visible Fiber Fault Detection
The Jonard VFL-150 injects visible red light into a connected optical fiber. When the fiber contains a compatible break, excessive bend, damaged area or poor connection, visible light may escape from the affected location. This allows technicians to identify certain faults without requiring full Optical Time-Domain Reflectometer analysis.
A visual fault locator is particularly useful for checking short fiber links, patch cables, pigtails and connections where the cable route is accessible. The visible output can also help technicians verify fiber continuity and confirm that the correct fiber has been selected during installation or maintenance.
Actual fault visibility depends on the fiber construction, cable jacket, ambient lighting, fault type and accessibility of the affected area. Not every optical fault will produce externally visible light, so additional test equipment may be required for complete link characterization.
FC, SC, ST and LC Connector Compatibility
The visual fault locator supports FC, SC and ST fiber connector interfaces. The VFL-150 kit also includes the VFL-25125 FC-to-LC adapter, allowing the visual fault locator to be used with compatible LC connectors.
This selection of connector options makes the kit useful across telecommunications, FTTx, enterprise networking, data centre and fiber optic service applications. Before connecting a fiber, technicians should inspect and clean both optical interfaces to prevent contamination transfer and obtain reliable results.
Included FC-to-LC Adapter
The included VFL-25125 adapter converts the visual fault locator interface from FC to LC. The adapter allows technicians to test LC-terminated fiber assemblies without purchasing a separate visual fault locator.
The adapter should be installed securely before connecting the LC fiber. Both ends of the adapter should be inspected and cleaned before use. Protective caps should be installed when the adapter is stored to help prevent dust and debris from reaching the optical interfaces.
Up to 5 km Test Distance
The Jonard VFL-150 supports fiber fault location over distances of up to 5 km, or approximately 3.1 miles. The practical test distance can vary according to fiber attenuation, connector loss, splice loss, cable construction and the nature of the fault.
For longer links or faults that do not produce visible leakage, an Optical Time-Domain Reflectometer may be required. The visual fault locator is best used as a convenient first-line tool for fiber identification, continuity checking and locating visible faults in accessible cable sections.
Portable Battery-Powered Operation
The VFL-150 operates using two AAA batteries and provides a stated battery life of up to 60 hours. The use of standard batteries makes replacement convenient for field technicians and avoids the need to carry a dedicated charging system.
The complete tool weighs approximately 72.57 g, making it easy to carry in a technician’s tool pouch or fiber optic test kit. Batteries should be removed before extended storage to reduce the risk of battery leakage and damage.
Jonard VFL-150 Applications
- Fiber optic cable continuity testing
- Locating visible fiber breakpoints
- Identifying certain fiber light leaks
- Detecting poor connector interfaces
- Locating certain stress points and excessive bends
- Testing FC, SC, ST and LC fiber connections
- Fiber patch cable troubleshooting
- Fiber pigtail inspection
- FTTx installation and maintenance
- Telecommunications network troubleshooting
- Data centre fiber maintenance
- Laboratory and training applications
Jonard VFL-150 Kit Contents
| Included Item | Description |
|---|---|
| VFL-25 | Visual fault locator for FC, SC and ST fiber connector interfaces |
| VFL-25125 | FC-to-LC adapter for testing compatible LC connectors |
Jonard VFL-150 Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Jonard Tools |
| Model | VFL-150 |
| Product Type | Visual Fault Locator Kit with FC-to-LC Adapter |
| Supported Fiber Connectors | FC, SC, ST and LC |
| Light Source | Class IIIA laser diode |
| Wavelength | 650 nm |
| Maximum Stated Distance | Up to 5 km (3.1 miles) |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Power Source | Two AAA batteries |
| Stated Battery Life | Up to 60 hours |
| Weight | Approximately 72.57 g |
| Included Visual Fault Locator | VFL-25 |
| Included Adapter | VFL-25125 FC-to-LC adapter |
| UPC | 811490016002 |
Recommended Operating Procedure
- Inspect and clean the visual fault locator interface and fiber connector.
- Install the FC-to-LC adapter when testing a compatible LC connector.
- Connect the fiber securely without forcing the connector.
- Activate the visual fault locator according to the manufacturer’s instructions.
- Inspect the accessible cable route, connection points and bends for visible red light.
- Switch off the laser before disconnecting the fiber or adapter.
- Install protective caps after use and store the kit in a clean, dry location.
Laser safety notice: The VFL-150 contains a Class IIIA visible laser source. Never look directly into the visual fault locator output, an active connector or the end of a connected fiber. Avoid directing the beam toward another person and follow applicable laser safety procedures during operation.
Testing notice: A visual fault locator does not replace an optical power meter, Optical Loss Test Set or Optical Time-Domain Reflectometer when quantitative loss measurement or detailed event analysis is required. Use suitable test equipment based on the fiber link and maintenance objective.
The Jonard VFL-150 Visual Fault Locator Kit provides a simple and portable way to investigate fiber continuity, visible breakpoints, leaks, poor connections and stress points. Its support for FC, SC, ST and LC connectors, 5 km test distance and extended battery life make it a practical tool for professional fiber optic installation and maintenance.