1. Introducció
The Irfora FY129C is an intelligent digital multimeter designed for accurate and efficient electrical measurements. This device combines multiple testing functions into a compact unit, making it suitable for various electrical tasks. It features automatic identification of measurement types and manual switching for specific functions, along with a large backlit LCD for clear readings.
2. Producte acabatview
2.1 Components del multímetre
The FY129C multimeter features a clear LCD display, function buttons, input jacks, and a robust casing.

Figura 1: Davant view of the Irfora FY129C Smart Digital Multimeter, showing the LCD screen and control buttons.

Figura 2: Diagram illustrating the key components and functions of the FY129C multimeter.
1. NCV Indicator, 2. Flashlight, 3. LCD Screen, 4. NCV/LIVE Key, 5. Power On Button, 6. Data Hold Key, 7. Flashlight Button, 8. Input Jack, 9. COM Jack.
2.2 Dimensions i disseny
The multimeter is designed to be compact and portable, with a built-in support bracket for convenient hands-free operation.

Figura 3: Physical dimensions of the FY129C multimeter: 123mm (4.84in) length, 61mm (2.40in) width, and 24mm (0.94in) thickness.

Figura 4: The FY129C multimeter shown with its integrated support bracket extended for desktop use.
3. Configuració
3.1 Instal·lació de la bateria
The FY129C multimeter requires two 1.5V AAA batteries (not included).
- Localitzeu la tapa del compartiment de la bateria a la part posterior del multímetre.
- Utilitzeu un tornavís per obrir el compartiment de la bateria.
- Introduïu dues piles AAA d'1.5 V, assegurant-vos de la polaritat correcta (+ i -).
- Substituïu la tapa del compartiment de la bateria i fixeu-la.
3.2 Connexió dels cables de prova
For most measurements, connect the test leads as follows:
- Inseriu el cable de prova negre a la presa d'entrada "COM" (comú).
- Introduïu el cable de prova vermell a la presa "INPUT".
Ensure connections are firm before taking any measurements.
4. Instruccions de funcionament
The FY129C offers both auto identification and manual switching modes for various measurements.

Figura 5: Illustration of the two measurement modes: Auto Identification (AC/DC voltage, frequency, resistance, continuity) and Manual Switching (AC/DC voltage, frequency, resistance, continuity, diode, capacitance, LIVE NCV).
4.1 Encès/Apagat
Premeu el botó Encès button (labeled with a power symbol) to turn the multimeter on or off. The device features an auto-shutdown function to conserve battery power after a period of inactivity.
4.2 Auto Identification Mode
In auto identification mode, the multimeter automatically detects and measures AC/DC voltage, frequency, resistance, and continuity. Simply connect the test leads to the circuit or component, and the device will display the appropriate reading.
4.3 Manual Switching Mode
Premeu el botó SEL button to cycle through manual measurement functions. The selected function will be indicated on the LCD.
- Volum AC / DCtage Mesura: Connect test leads in parallel to the circuit. The multimeter can measure AC voltage from 0.8V to 500V and DC voltagi de 0.8V a 500V.
- Mesura de la resistència: Ensure the circuit is de-energized. Connect test leads across the component. Measures resistance from 30Ω to 60MΩ.
- Mesura de freqüència: Connect test leads to the signal source. Measures frequency from 10Hz to 6000Hz.
- Prova de continuïtat: For checking if a circuit is complete. A low resistance reading (typically below 50Ω) indicates continuity, often accompanied by an audible beep.
- Prova de díode: Measures the forward voltage drop of a diode. Connect the red lead to the anode and the black lead to the cathode.
- Mesura de la capacitat: Measures capacitance from 6nF to 60000µF. Ensure capacitors are discharged before testing.

Figura 6: The FY129C multimeter displaying a capacitance measurement, indicating its ability to measure up to 60000µF.
- Mesura de la temperatura: Connect the provided thermocouple to the multimeter. Measures temperature from -20℃ to 1000℃.

Figura 7: The FY129C multimeter using a thermocouple to measure the temperature of a liquid.
4.4 Vol. sense contactetage (NCV) and Live Wire Checking
La funció NCV permet la detecció del volum de CAtage sense contacte directe, millorant la seguretat.
- Premeu el botó NCV EN DIRECTE button to activate NCV mode.
- Bring the top of the multimeter close to the wire or outlet. The NCV indicator and audible alerts will signal the presence of AC voltage.
- For Live Wire Checking, use the NCV LIVE function to distinguish between live and neutral wires in an AC circuit.

Figura 8: The FY129C multimeter demonstrating its Non-Contact Voltage (NCV) detection capability near an electrical outlet, indicating insulation safety.
5. Característiques addicionals
5.1 Retenció de dades
Premeu el botó MANTENIM button to freeze the current reading on the display. Press it again to release the hold function. This is useful for recording measurements in difficult-to-read situations.
5.2 Flashlight and Screen Backlight
The multimeter includes a built-in flashlight and screen backlight for improved visibility in dimly lit environments.
- Premeu el botó Llanterna button (often integrated with the HOLD button or a separate button) to turn the flashlight on or off.
- The screen backlight typically activates automatically when the device is powered on or can be toggled with a dedicated button (if available).
5.3 Apagat automàtic
To conserve battery life, the FY129C multimeter will automatically power off after a period of inactivity.
6. Especificacions
| Paràmetre | Especificació |
|---|---|
| Model | FY129C |
| Material | ABS |
| Vol. ACtage Rang | 0.8V~500V, ±(1.5%+5) |
| DC Voltage Rang | 0.8V~500V, ±(1.2%+5) |
| Interval de resistència | 30Ω~60MΩ, ±(2%+5) |
| Interval de freqüència | 10Hz~6000Hz, ±(2.5%+5) |
| Interval de capacitat | 6nF~60000µF, ±(2.5%+5) |
| Interval de temperatura | -20℃~1000℃, ±(5%+4) |
| Temperatura ambient | 0 ℃ ~ 70 ℃ |
| Prova de díode | Sí |
| Prova de continuïtat | Sí |
| NCV | Sí |
| Live Wire Checking | Sí |
| Apagat automàtic | Sí |
| Font d'alimentació | 2 * 1.5V AAA batteries (Not included) |
| Mida de l'article | 123 * 61 * 24 mm / 4.84 * 2.40 * 0.94 polzades |
| Pes de l'article | 115 g / 4.05 oz |
| Fabricant | Irfora |
| País d'origen | Xina |
7. Manteniment
- Neteja: Netegeu el multímetre casing amb anunciamp tela. No utilitzeu netejadors abrasius ni dissolvents.
- Substitució de la bateria: Replace batteries when the low battery indicator appears on the display to ensure accurate readings. Refer to Section 3.1 for installation instructions.
- Emmagatzematge: Store the multimeter in a dry, cool place, away from direct sunlight and extreme temperatures. Remove batteries if storing for extended periods to prevent leakage.
- Cables de prova: Inspect test leads regularly for any signs of damage (cracks, frayed insulation). Replace damaged leads immediately to prevent electrical shock.
8. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El multímetre no s'encén. | Piles gastades o instal·lades incorrectament. | Check battery polarity and replace with new 1.5V AAA batteries. |
| No hi ha lectura ni es mostra "OL" (sobrecàrrega). | Incorrect measurement range, open circuit, or value exceeds range. | Ensure correct function is selected. Check for open circuits. If in manual mode, try auto mode or a higher range if applicable. |
| Lectures inexactes. | Bateria baixa, cables de prova danyats o interferències externes. | Canvieu les piles. Inspeccioneu els cables de prova per si hi ha danys. Allunyeu-vos de camps electromagnètics forts. |
| Continuity test does not beep. | Open circuit or resistance too high. | Ensure the circuit is complete and resistance is below the continuity threshold. |
9. Informació de seguretat
Always observe basic safety precautions when using electrical testing equipment to reduce the risk of fire, electric shock, or personal injury.
- No utilitzeu el multímetre si sembla que està danyat o si els cables de prova estan compromesos.
- No aplicar voltage or current that exceeds the maximum specified limits for the multimeter.
- Aneu amb compte quan treballeu amb volumtagper sobre de 30 V CA RMS, 42 V pic o 60 V CC. Aquests voltagsuposen un risc de xoc.
- Always disconnect power to the circuit before measuring resistance, continuity, diode, or capacitance.
- Ensure your hands are dry and you are standing on an insulated surface when taking measurements.
- Utilitzeu la funció i el rang correctes per a cada mesura.
- The NCV function is for indication only; always verify the absence of voltage with direct contact measurements before touching any conductors.
10. Contingut del paquet
En obrir el paquet, comproveu que hi hagi tots els elements:
- 1 * Irfora FY129C Digital Multimeter
- 1 * Pair of Test Leads (Red and Black)
- 1 * Thermocouple
- 1 * Cloth Bag
- 1 * Manual d'usuari (anglès)
11. Assistència i garantia
For technical support or inquiries regarding your Irfora FY129C Smart Digital Multimeter, please contact your retailer or the manufacturer directly. Specific warranty information may vary by region and retailer. Please refer to your purchase documentation for details.

