Fiber Optic Test Equipment Visual Fault Locator VFL to Check Fibers
General information
The Visual Fault Locator launches 650nm visible laser light into the fiber.
When the light encounters a break or sharp bend, it scatters, and the scattered light can be observed emerging from the cable. The Visual Fault Locator can locate breaks in short patch cords, which an OTDR cannot detect due to their operating dead zone. A fault locator is also much cheaper than an OTDR.
The Pen-type Visual Fault Locator can be operated in either continuous wave mode (CW mode) or in pulsed mode. Pulsed mode aids in locating faults under high ambient light conditions and improve battery life. It also could be used in checking connector quality. Often a connector may appears to be perfect. But inside the connector ferrule itself, poor gluing or dirty may create a microbend in the fiber. This microbend will produce excess insertion losses or return losses, and may result in premature failure of the connector. As the visual light launches through the fiber, it emerges from the connector in question, one can readily see
the distortion as a series of rings superimposed on a normal output. Bending or twisting the fiber may affect the overall intensity pattern, but not the ring pattern itself.
Applications
- Maintenance in telecom , CATV
- Test Lab of optical fibers
- Fiber routing and continuity checking in optical networks.
- Other fiber optic measurements
Features
- Pen sized VFL fault locater & line tracer
- Single mode, multimode and plastic fiber applications
- Eye safe Class 1 device, no safety procedures required
- Rugged & simple fibre optic fault finder
- 2.5 & 1.25 mm universal connector options
- Pulsed or continuous laser options
- Useful in combination with an OTDR, to help exactly identify a fault
Function
- Fiber breakage, bending failure location Fault check
- OTDR dead zone
- End-to-end optical recognition
- Mechanical connection point optimization
Technical Specifications
| Model | VFL650-5S |
| Central wavelength | 650nm±10nm (635nm is available on request) |
| Emitter type | FP-LD |
| Output power | 5mw | 10mw | 20mw | 30mw |
| Laser Range | ≥5KM | ≥10KM | ≥20KM | ≥30KM |
| Optical connector | 2.5mm universal connector, for 1.25mm connectors, FC (Male)-LC. (Female) convertor can be provided on request |
| Operating model | Both CW and Pulse available |
| Pulse frequency | 2Hz to 3Hz/9Hz |
| Power supply | 2AA alkaline batteries |
| Battery | AA alkaline battery |
| Operating temperature | -20°C to 60°C |
| Storage temperature | -40°C to 85°C |
| Dimension | 176*16mm |
| Weight | 100g (without battery) |
Standard Packages – Pen-type Visual Fault Locator
| Model | Includes |
| VFL-650-2S | Main unit, User Manual |
Fiber Optic Visual Fault Locator, Optical Fiber Visual Fault Locator, Handheld Fiber Visual Fault Locator, Bench-top Visual Fault Locator
Product Tags:
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Single mode Fiber Optic Test Equipment Visual Fault Locator VFL to Check Fibers Images
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