Multifunctional Fiber Optic Tester NOYAFA NF-919 — Power Meter, Light Source and Visual Fault Locator

The NOYAFA NF-919 is a multifunctional fiber optic tester that integrates an optical power meter, a stable light source and a visual fault locator (VFL) into a single portable unit. Designed for field use by installers and technicians, this device supports routine testing, verification and troubleshooting of single-mode and multimode fiber links. The compact form factor and combined functions reduce the need to carry multiple instruments and help speed up diagnostics and maintenance of fiber networks.

Advantages

The unit combines three core functions—power measurement, reference light source and visible fault localization—into one handheld instrument, simplifying testing workflows. Its portable design and battery-powered operation enable use in remote or confined environments. The clear optical output and sensitivity of the meter provide reliable readings for link verification, while the VFL produces a visible red laser for locating breaks, bends and faulty connectors. The controls and display are designed for straightforward operation, allowing efficient on-site measurements.

Suitable for

• Installation and acceptance testing of fiber optic links
• Field troubleshooting and fault location on fiber runs
• Maintenance checks and periodic verification of network performance
• Laboratory and workshop testing where a compact combined tool is needed

Key specifications

• Functions: optical power meter, stable light source, visual fault locator
• Wavelengths supported for measurement and source: common telecom wavelengths for single-mode and multimode fibers
• Display: clear numeric readout for power measurements and function status
• Light source output: stable optical signal suitable for reference testing
• VFL output: visible red laser for fault localization along fiber length
• Power supply: battery-operated for field portability
• Form factor: handheld, ruggedized for site use

How to use

Select the required function on the device—power meter, light source or VFL—then connect the appropriate fiber connector to the tester. When using the power meter, ensure the reference level or zeroing procedure is performed as needed before measuring optical power to obtain accurate results. When using the light source, connect the source to the fiber under test and read power at the far end with a compatible power meter. For fault localization, enable the visual fault locator and inspect the fiber for visible light leakage at bends, breaks or faulty terminations. Observe safety precautions for laser use and avoid direct eye exposure to the visible laser output.

Usage recommendations

Use clean connectors and follow standard fiber handling practices to ensure accurate measurements. Verify the appropriate wavelength and fiber type (single-mode or multimode) before testing, and store the instrument in a protective case when not in use to preserve calibration and prolong service life.