1. Introducció
The NOYAFA NF-909 is an all-in-one optical multimeter designed for optical attenuation measurement. It functions as both an optical power meter and a stable light source, offering versatile capabilities for fiber optic testing. This device is equipped with features such as dual wavelength output, multiple modulation frequencies, automatic wavelength recognition, and an intuitive LCD display.

Figure 1: NOYAFA NF-909 Optical Power Meter & Light Source
2. Configuració
2.1 Contingut del paquet
Before using the device, please ensure all items are present:
- NOYAFA NF-909 Optical Power Meter & Light Source
- Bossa de transport
- Manual d'instruccions (aquest document)
- Batteries (3x 1.5V, typically AAA type, included)

Figure 2: Product packaging and included accessories
2.2 Instal·lació de la bateria
The device requires three 1.5V batteries. Locate the battery compartment on the back of the device, open it, insert the batteries according to the polarity markings, and close the compartment securely.
2.3 Connexió de cables de fibra òptica
The NF-909 features fiber ports for connecting optical cables. Ensure the dust covers are removed before connection and replaced after use to protect the ports.

Figure 3: Fiber ports with dust cover removed. All fiber connectors are compatible.
3. Instruccions de funcionament
3.1 Dispositiu acabatview

Figure 4: NOYAFA NF-909 Product Details and Button Layout
- Funda antipols: Protects fiber ports when not in use.
- Port de fibra: Connects to optical fiber cables.
- Pantalla LCD: Displays measurements, wavelengths, and settings.
- Port de càrrega: For recharging the device (if using rechargeable batteries).
- OP/SL (Function Switch/Calibration): Toggles between power meter and light source functions, and initiates calibration.
- Lambda (Wavelength): Cycles through available wavelengths for the power meter.
- dBm/W (Power Range Switch): Switches between linear (W) and logarithmic (dBm) power display.
- REF (Reference): Sets the current power reading as a reference value.
- Interruptor d'alimentació: Encén/apaga el dispositiu.
- Light Source & Hybrid Key: Activates the light source function and may have other hybrid functions depending on the mode.
3.2 Engegada/apagada
Manteniu premut el botó Interruptor d'alimentació botó per encendre o apagar el dispositiu.
3.3 Optical Power Meter Function
- Enceneu el dispositiu.
- Ensure the device is in power meter mode (indicated on the LCD). If not, press OP/SL per canviar.
- Connect the fiber optic cable to the fiber port.
- The power meter can automatically recognize and switch to the measured wavelength.
- Premeu Lambda to manually cycle through the available wavelengths (850/1300/1310/1490/1550/1625nm) if needed.
- Premeu dBm/W to switch between linear (W) and logarithmic (dBm) display of optical power.
- To set a reference value, press REF. The display will show the current reading as 0dB, and subsequent measurements will be relative to this reference.

Figure 5: Power meter display showing wavelength and power reading. The power meter supports 6 wavelengths.
3.4 Light Source Function
- Enceneu el dispositiu.
- Premeu OP/SL to switch to light source mode.
- Premeu el botó Light Source & Hybrid Key to activate the light source.
- The light source provides dual wavelength output at 1310nm and 1550nm.
- It supports continuous wave (CW) output and modulated wave outputs at 270Hz, 1kHz, and 2kHz.
- The light source can send wavelength identification codes, which the power meter can automatically detect.
3.5 Funcions automàtiques
- Automatic Wavelength Detection: The power meter automatically detects the wavelength being measured when connected to a compatible light source.
- Automatic Range Conversion: The optical power display automatically adjusts its range for optimal readability.
- Retroil·luminació LCD: The LCD screen features a backlight for visibility in various lighting conditions.
- Apagat automàtic: The device will automatically shut down after 60 minutes of no operation to conserve battery life. This feature can typically be shielded or disabled through specific key combinations (refer to the full manual for details).
- Charging Shutdown: The device automatically shuts off charging once the batteries are fully charged.

Figure 6: Key features including steady power meter wavelength output, stable modulation frequency, auto-detect, and auto-power off.
4. Manteniment
4.1 Neteja
- Device Exterior: Netegeu el dispositiu amb un drap suau i sec. No utilitzeu productes de neteja abrasius ni dissolvents.
- Ports de fibra: Keep the fiber ports clean. Use specialized fiber optic cleaning tools (e.g., lint-free wipes and isopropyl alcohol) to clean the ports if contamination is suspected. Always replace dust covers when ports are not in use.
4.2 Cura de la bateria
- If using non-rechargeable batteries, replace them when the low voltagApareix un indicador.
- If using rechargeable batteries, ensure they are charged regularly. The device has an automatic charging shutdown feature to prevent overcharging.
- Traieu les piles si no heu d'utilitzar el dispositiu durant un període prolongat per evitar fuites.
4.3 Emmagatzematge
Store the device in its protective carrying pouch in a cool, dry place away from direct sunlight and extreme temperatures. Ensure dust covers are on the fiber ports.
5. Solució De Problemes
5.1 No Display/Device Not Turning On
- Comproveu la instal·lació de la bateria i assegureu-vos de la polaritat correcta.
- Substituïu les piles per unes de noves.
- Assegureu-vos que el botó d'engegada estigui premut i mantingut prou premut.
5.2 Inaccurate Power Readings
- Ensure fiber ports and connectors are clean. Contamination can significantly affect readings.
- Verify that the correct wavelength is selected or automatically detected for the measurement.
- Perform a calibration if necessary (refer to the full manual for calibration procedures).
- Check if the fiber cable itself is damaged.
5.3 Light Source Not Emitting
- Ensure the device is in light source mode.
- Comproveu el nivell de la bateria.
- Verify that the Light Source & Hybrid Key is pressed to activate the output.
5.4 Automatic Shutdown Occurs Too Soon
The device has a 60-minute auto-shutdown feature. If it's shutting down unexpectedly before this period, check battery levels. If the issue persists, consult the full product manual for options to adjust or disable the auto-shutdown feature.
6. Especificacions
| Paràmetre | Valor |
|---|---|
| Nom del producte | NF-909 Optical Power Meter & Light Source |
| Power Detecting Range (dBm) | -70 ~ +10 |
| Detection Wavelength Range | 800-1700 nm |
| Tipus de sonda | InGaAs |
| Límit de detecció | ≤1.0 mm |
| Standard Wavelengths (Power Meter) | 850/1300/1310/1490/1550/1625nm |
| Resolució de visualització | 0.01dBm |
| Modulation Frequencies | CW/270Hz, 1Hz, 2Hz |
| Standard Wavelengths (Light Source) | 1310/1550 nm |
| Tipus d’emissor | FP-LD |
| Temperatura de treball | -20 ~ + 70 ° C |
| Font d'alimentació | 3 piles de 1.5 V |
| Dimensió general | 160 x 75 x 32 mm |
| Bateria inclosa | Sí |
| Certificació | CE |
| Origen | Xina continental |
Figure 7: Detailed Product Information Table
7. Consells d'usuari
- Mantenir els ports nets: Always ensure the fiber optic ports and connectors are free from dust and debris. Even small particles can cause significant measurement errors. Use appropriate cleaning tools.
- Gestió de la bateria: For optimal performance and longevity, use high-quality batteries. If using rechargeable batteries, ensure they are fully charged before critical measurements.
- Configuració de referència: Utilize the REF function to establish a baseline measurement for relative power loss calculations, which is crucial for link budget analysis.
8. Garantia i Suport
Per obtenir informació sobre la garantia, assistència tècnica o consultes sobre el servei, poseu-vos en contacte amb el punt de compra original o directament amb el fabricant. Conserveu el rebut de compra com a comprovant de compra.