1. Producte acabatview
The NOYAFA NF-919 is a versatile 3-in-1 optical fiber tester designed for comprehensive fiber optic network testing. It integrates an optical power meter, a stable light source, and a visual fault locator (VFL) into a single, compact device. This tool is essential for fiber cable construction and maintenance, offering rapid power and loss detection.

Característiques principals:
- Mesura de potència òptica: Accurately measures optical power and attenuation values.
- Stable Light Source: Provides stable light output at various wavelengths and frequencies.
- Localitzador visual de fallades (VFL): Emits a red laser for identifying fiber breaks, bends, and faulty connectors.
- Pantalla a color d'alta definició: Clear data display for easy operation.
- Interfície universal: Supports FC, SC, and ST fiber optic interfaces.
- Compacte i portàtil: Designed for one-hand operation and easy portability.
- Disseny durador: ABS engineering plastic with silicone edge protection for impact resistance.
- Bateria recarregable: Built-in 1500mAh lithium battery with Type-C charging.
2. Contingut del paquet
Upon opening your NOYAFA NF-919 package, please verify that all items listed below are present and in good condition:

- 1x NF-919 Main Tester
- 1 cable de càrrega USB tipus C
- Certificat de qualitat
- 1x Lithium Battery Precautions Card
- 1x Manual d'usuari (aquest document)
- 1x Bossa de transport
- 1x Caixa de colors
3. Device Layout and Interface
Familiarize yourself with the NF-919's physical layout and button functions before operation.

Ports:
- OPM Port: For optical power measurement.
- SL Port: For stable light source output.
- VFL Port (RL): For visual fault locator (red light) output.
- Port USB tipus C: Per carregar el dispositiu.
Botons:
- Botó On/Off: Encén o apaga el dispositiu.
- Botó REF: Sets the reference for relative power (loss) testing in OPM mode.
- dBm/W Button: Cycles through power units (dBm, W) in OPM mode.
- OP/SL Button: Switches between Optical Power (OP) and Stable Light Source (SL) functions.
- λ/RL Button: Switches between wavelengths (λ) in OPM/SL modes and activates Red Light (RL) function.
- Frequency Button (Hz): Adjusts the frequency in SL and RL modes.

4. Configuració i càrrega
4.1 Càrrega inicial
Before first use, fully charge the device using the provided USB Type-C cable.

- Connecteu el cable USB tipus C al port de càrrega del dispositiu.
- Connect the other end to a standard USB power adapter (not included) or a computer USB port.
- L'indicador de bateria a la pantalla LCD mostrarà l'estat de càrrega.
4.2 Encès/Apagat
- Manteniu premut el botó On/Off button to power the device on or off.
5. Instruccions de funcionament
The NF-919 offers three primary functions: Optical Power Meter (OPM), Stable Light Source (SL), and Visual Fault Locator (VFL/Red Light).
5.1 Stable Light Source Function (SL)
This function provides a stable optical signal for testing fiber optic cables.
- Premeu el botó OP/SL button to switch to SL mode. The display will show 'SL'.
- Premeu el botó λ/RL button to cycle through available wavelengths: 1310nm, 1550nm.
- Premeu el botó Freqüència button to change the output frequency: 00 (continuous), 270Hz, 1000Hz, 2000Hz.
- Connect the fiber to be tested to the SL port.
5.2 Optical Power Meter Function (OPM)
This function measures the optical power and attenuation in fiber optic networks.
- Premeu el botó OP/SL button to switch to OP mode. The display will show 'OP'.
- Premeu el botó λ/RL button to cycle through the measurement wavelengths: 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650nm.
- Premeu el botó dBm/W button to switch between power units: dBm, mW, uW, nW.
- Connect the fiber to be measured to the OPM port. The current optical power will be displayed.
- REF Function (Relative Power/Loss Test): To measure optical attenuation, first establish a reference power. With a known good fiber connected and stable power reading, press the REF button. The display will show 'Ref' and the current power reading will be set as the reference (0.00dB). Then, connect the fiber segment or component you wish to test for loss. The display will show the attenuation relative to the reference.
5.3 Visual Fault Locator (VFL) / Red Light Function (RL)
This function uses a red laser to visually locate faults in fiber optic cables.
- Premeu el botó λ/RL button to activate the Red Light function. The display will show 'RL' and the wavelength 650nm.
- Premeu el botó Freqüència button to switch between continuous (00Hz) and flashing (01Hz) modes.
- Connect the fiber to the VFL port. Observe the fiber for red light leakage at fault points.

6. Manteniment i cura
6.1 Neteja
- Regularly clean the optical ports (OPM, SL, VFL) with a lint-free swab and optical cleaning solution to ensure accurate measurements and prevent damage.
- Wipe the device's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.
6.2 Emmagatzematge
- When not in use, always cover the optical ports with their protective caps to prevent dust and debris from entering.
- Guardeu el dispositiu a la seva bossa de transport en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.

6.3 Cura de la bateria
- Recharge the battery when the low battery indicator appears on the screen.
- If storing for an extended period, charge the battery to approximately 50% and recharge every 3-6 months to maintain battery health.

7. Solució De Problemes
- El dispositiu no s'encén: Assegureu-vos que la bateria estigui carregada. Connecteu-la a una font d'alimentació amb el cable tipus C i torneu-ho a provar.
- Lectures OPM inexactes: Clean the OPM port and the fiber connector ends. Ensure the correct wavelength is selected for measurement.
- VFL red light is dim or absent: Ensure the VFL port is clean and the fiber is properly connected. Check battery level.
- El dispositiu s'apaga inesperadament: The device has an intelligent standby mode and will automatically shut off after 30 minutes of inactivity. This feature can be toggled on/off in settings (refer to the full manual for detailed instructions if available). If it shuts off during active use, check battery level.
8. Especificacions
The following table details the technical specifications of the NOYAFA NF-919:

| Característica | Descripció |
|---|---|
| Número de model | NF-919 |
| Mostra | LCD color |
| Light Source Function Wavelengths | 1310 nm, 1550 nm |
| Light Source Function Frequencies | 00 Hz, 270 Hz, 1000 Hz, 2000 Hz |
| OPM Test Function Wavelengths | 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650nm |
| OPM Test Function Units | dBm, W, uW, nW |
| OPM Test Function REF | Yes (for relative power/loss testing) |
| Red Light Function Wavelength | 650 nm |
| Red Light Function Frequencies | 00Hz (Steady on), 01Hz (Flashing) |
| Apagat automàtic | 30 minutes of inactivity (can be set on/off) |
| Indicació de bateria baixa | Sí |
| Temperatura de treball | -20 °C ~ 50 °C |
| Font d'alimentació | Bateria de liti de 3.7 V i 1500 mA |
| Dimensions del producte | 139 mm x 84 mm x 29 mm (5.47 polzades x 3.30 polzades x 1.14 polzades) |
| Error de mesura | Less than ±0.3dB |
| Interval de mesura | -60 a +8 dBm |
9. Consells d'usuari
- Always ensure fiber ends are clean before connecting to the tester to prevent damage to the ports and ensure accurate readings.
- When using the VFL, avoid direct eye exposure to the red laser light.
- Utilize the REF function in OPM mode to accurately measure insertion loss of fiber components or splices.
- The compact size makes it ideal for fieldwork; always use the provided carry bag for protection during transport.
10. Garantia i Suport
For warranty information, technical support, or service inquiries, please contact NOYAFA Official Store directly. Keep your purchase receipt as proof of purchase.