1. Introdución e información de seguridade
This manual provides essential instructions for the safe and effective operation, maintenance, and troubleshooting of your VOLTCRAFT VC851 Digital Multimeter. Please read this manual thoroughly before using the device and keep it for future reference.
1.1 Advertencias xerais de seguridade
Always adhere to the following safety precautions to prevent electric shock, injury, or damage to the meter or equipment under test:
- The VOLTCRAFT VC851 is rated for CAT III 1000 V and CAT IV 600 V. Ensure you understand these categories and their implications for safe measurement.
- Non aplique máis que o voltage, como se marca no contador, entre terminais ou entre calquera terminal e a terra.
- Teña coidado ao traballar con voltagpor riba de 30 V CA RMS, 42 V pico ou 60 V CC. Estes voltagsupoñen un perigo de descarga.
- Before each use, inspect the test leads for damaged insulation or exposed metal. Replace damaged leads immediately.
- Ensure the rotary switch is in the correct position for the desired measurement before connecting the test leads to the circuit.
- Never use the meter if it appears damaged or if the case is open.
- Non opere o medidor en ambientes con gases, vapores ou po explosivos.
- Desconecte sempre os cables de proba do circuíto antes de cambiar a función ou o rango.
- Substitúa a batería en canto apareza o indicador de batería baixa para garantir lecturas precisas.
2. Produto rematadoview
The VOLTCRAFT VC851 is a versatile digital multimeter designed for precise electrical measurements. It features a 6000-count display, auto-ranging capabilities, and integrated flashlight and screen illumination for use in various environments.

Figura 2.1: Fronte view of the VOLTCRAFT VC851 Digital Multimeter with connected test leads. This image shows the display, rotary dial, function buttons, and input jacks.

Figura 2.2: Traseira view of the VOLTCRAFT VC851 Digital Multimeter, illustrating the integrated test lead storage and kickstand.
3. Configuración e funcionamento inicial
3.1 Instalación da batería
The VOLTCRAFT VC851 is powered by batteries. To install or replace batteries:
- Asegúrese de que o multímetro estea apagado e desconecte todos os cables de proba.
- Localiza a tapa do compartimento da batería na parte traseira do dispositivo.
- Use un desaparafusador para abrir o compartimento da batería.
- Insert new batteries, observing the correct polarity (+/-).
- Peche ben a tapa do compartimento da batería.

Figura 3.1: Atrás view of the multimeter, highlighting the battery compartment for installation or replacement.
3.2 Conexión dos cables de proba
To prepare for measurements:
- Insira o cable de proba negro na toma de entrada "COM" (común).
- Insert the red test lead into the appropriate input jack for your measurement:
- "VΩHz" para o volumetagProbas de e, resistencia, frecuencia, capacitancia e díodos.
- "mAµA" para miliampere e microampmedicións de corrente aquí.
- "10A" for high current (up to 10A) measurements.

Figure 3.2: The multimeter with test leads properly connected to the input jacks, ready for use.
4. Instrucións de funcionamento
The VOLTCRAFT VC851 features a rotary dial for selecting primary measurement functions and buttons for secondary functions and settings.
4.1 Selección de funcións
Turn the central rotary dial to select the desired measurement function (e.g., V for voltage, A for current, Ω for resistance). The meter will automatically select the appropriate range (Auto-Range) for most measurements.
4.2 Modos de medición
- Voltage (V~ / V-): Measure AC or DC voltage. Select the appropriate voltage range using the rotary dial.
- Corrente (A~ / A-): Measure AC or DC current. Ensure test leads are connected to the correct current input jacks (mAµA or 10A) and the rotary dial is set to the corresponding current range.
- Resistencia (Ω): Measure resistance in ohms.
- Continuidade: Test for continuity with an audible buzzer.
- Proba de diodo: Test diodes for proper function.
- Capacitancia (F): Measure capacitance in farads.
- Frecuencia (Hz): Measure frequency in hertz.
- Temperatura (°C/°F): Measure temperature using the included temperature probe.
4.3 Características especiais
- Lanterna: Press the dedicated flashlight button to illuminate the work area.
- Iluminación da pantalla: The display features backlighting for improved visibility in low-light conditions.
- Retención de datos: Prema o botón "HOLD" para conxelar a lectura actual na pantalla.
- Min/Máx: Use the "MIN/MAX" function to record the minimum and maximum values during a measurement session.

Figure 4.1: The multimeter in use, demonstrating its application in an electrical panel for voltage or current checks.

Figure 4.2: The multimeter being used for precise measurements on a circuit board, showcasing its versatility for electronics work.
5. Mantemento
Proper maintenance ensures the longevity and accuracy of your VOLTCRAFT VC851 Digital Multimeter.
5.1 Limpeza
- Always turn off the meter and disconnect test leads before cleaning.
- Limpar o caso co anuncioamp pano e deterxente suave. Non use abrasivos nin disolventes.
- Ensure no moisture enters the case.
5.2 Substitución da batería
Consulte a Sección 3.1 para obter instrucións detalladas sobre a substitución das baterías. Substitúa as baterías canto apareza o indicador de batería baixa para manter a precisión da medición.
5.3 Substitución de fusibles
If the current measurement function stops working, the fuse may need replacement. Fuses are critical safety components. Always replace with a fuse of the specified type and rating.
- Asegúrese de que o multímetro estea apagado e desconecte todos os cables de proba.
- Abra a tapa do compartimento das baterías (consulte a Sección 3.1).
- Retire con coidado o fusible antigo.
- Install a new fuse of the exact same type and rating. Refer to the specifications section for fuse details.
- Peche ben a tapa do compartimento da batería.
6 Solución de problemas
If you encounter issues with your VOLTCRAFT VC851, consult the following table for common problems and solutions.
| Problema | Causa posible | Solución |
|---|---|---|
| Sen pantalla ou pantalla tenue | Baterías baixas ou agotadas | Replace batteries (see Section 3.1). |
| Lecturas incorrectas | Incorrect function/range selected; Damaged test leads; External interference | Verify rotary switch position; Inspect and replace test leads if damaged; Move away from strong electromagnetic fields. |
| A medición de corrente non funciona | Blown fuse; Incorrect lead connection | Replace fuse (see Section 5.3); Ensure leads are in the correct current input jacks. |
| "OL" (Sobrecarga) móstrase | Measurement exceeds selected range or meter's maximum capacity | Switch to a higher range if available, or ensure the measured value is within the meter's specifications. |
7. Especificacións técnicas
| Característica | Especificación |
|---|---|
| Número de modelo | VC-12884325 |
| Valoración de seguridade | CAT III 1000 V, CAT IV 600 V |
| Mostrar contas | 6000 contas |
| Variando | Rango automático |
| Funcións | AC / DC Voltage, AC/DC Current, Resistance, Continuity, Diode, Capacitance, Frequency, Temperature |
| Características especiais | Flashlight, Screen Illumination, Data Hold, Min/Max |
| Dimensións (L x W x H) | 4.3 x 9.1 x 20 cm (1.7 x 3.6 x 7.9 polgadas) |
| Peso | 430 gramos (0.95 libras) |
| Fonte de enerxía | Alimentado por batería |
| Dispoñibilidade de Recambios | 1 ano |
8. Garantía e soporte
VOLTCRAFT products are designed for reliability and performance. This product comes with a standard warranty. For specific warranty terms and conditions, please refer to the documentation included with your purchase or visit the official VOLTCRAFT websitio.
Spare parts are available for 1 year from the date of purchase. For technical support, service, or inquiries regarding spare parts, please contact VOLTCRAFT customer service through their official channels.
Conserve o comprobante de compra para reclamacións de garantía.





