1. Introdución
The Qiilu 8-in-1 Voltage Tester Pen is a compact and lightweight electrical instrument designed for detecting AC and DC voltage, as well as polarity. This multifunctional tool features an integrated LED light and can also serve as a screwdriver. It is suitable for testing a wide range of voltages from 6V to 380V, making it ideal for various automotive and household electrical applications. This manual provides essential information for the safe and effective use of your voltagprobador.

Figure 1: Qiilu 8-in-1 Voltage Tester Pen. This image shows the yellow voltage tester pen with its black probe, positioned in front of a white convertible car, illustrating its use in automotive contexts.
2. Información de seguridade
Always observe the following safety precautions when using the Qiilu Voltage Tester Pen:
- Risco eléctrico: This device tests live electrical circuits. Improper use can result in electric shock, injury, or death.
- Ler as instrucións: Lea e comprenda todas as instrucións deste manual antes do uso.
- Equipos de protección individual: Always wear appropriate personal protective equipment (PPE), such as safety glasses and insulated gloves, when working with electricity.
- Inspeccionar antes de usar: Before each use, inspect the tester for any signs of damage, including cracks in the casinou cables desgastados. Non o use se está danado.
- Rango de funcionamento: Do not attempt to test voltages outside the specified range of 6V to 380V.
- Condicións secas: Use the tester only in dry conditions. Do not use in wet or damp ambientes.
- Persoal cualificado: If you are unsure about any electrical procedure, consult a qualified electrician.
3. Características do produto
The Qiilu 8-in-1 Voltage Tester Pen offers the following key features:
- Deseño multifuncional: Combina voltage testing, an LED light, and a screwdriver function.
- Ancho VoltagRango: Capable of testing AC and DC voltagé de 6V a 380V.
- Clear Indication: Features multiple LED indicator lights for precise voltage level readings (6V, 12V, 24V, 50V, 110V, 220V, 380V).
- Polarity Detection: Indicates positive and negative polarity for DC circuits.
- Compacto e portátil: Lightweight design for easy carrying and use in various environments.

Figure 2: Key features of the Qiilu Voltage Tester. This image displays the yellow voltage tester alongside a list of its main functionalities, including its compact design, 8-in-1 features, voltage and polarity indication, and multiple gear indicator lights for AC/DC testing.
4. Contido do paquete
O paquete normalmente inclúe:
- 1 x Qiilu 8-in-1 Voltage Tester Pen (Model QL-108)

Figure 3: Dimensions of the Voltage Tester. This image shows the voltage tester with measurements indicating its length (18.5cm / 7.3in), the length of the black probe (12.5cm / 4.9in), and the cable length (80cm / 31.5in).
5. Configuración
The Qiilu Voltage Tester Pen is ready for use out of the box. No assembly or battery installation is required as it draws power directly from the circuit being tested.
- Ensure the tester and its probes are clean and free from damage.
- Familiarize yourself with the voltage indicator lights on the tester body.
6. Instrucións de funcionamento
Follow these steps to use your voltage probador:
6.1. AC/DC Voltage Probas
- Sujete firmemente o corpo principal do probador.
- Connect the red probe tip to one point of the circuit you wish to test.
- Connect the black probe tip to the other point of the circuit.
- Observe the LED indicator lights on the tester. The lights corresponding to the detected voltage level will illuminate. For example, if testing a 12V car battery, the 6V and 12V LEDs should light up.
- Para AC voltage, the lights will indicate the approximate voltage range. For DC voltage, the lights will indicate the voltage, and the polarity indicator (+/-) will show the positive or negative terminal.

Figure 4: Testing a fuse box with the voltage tester. This image shows the voltage tester being used to check connections within a car's fuse box, demonstrating its application in automotive diagnostics.

Figure 5: Using the voltage tester on an electrical panel. The image depicts the voltage tester's probes connected to terminals inside an electrical control panel, indicating its suitability for industrial or home electrical work.
6.2. Polarity Indication (DC Circuits)
When testing DC circuits, the tester will indicate polarity:
- Se o '+' LED illuminates, the red probe is connected to the positive terminal and the black probe to the negative terminal.
- Se o '-' LED illuminates, the red probe is connected to the negative terminal and the black probe to the positive terminal (reverse polarity).
6.3. Función do destornillador
The tips of both probes can be used as small screwdrivers for light-duty tasks. Ensure the circuit is de-energized before using the probes as screwdrivers to avoid electrical hazards.

Figure 6: Detail of the black probe tip. This close-up shows the flat-head screwdriver tip of the black probe, highlighting its secondary function.

Figure 7: Detail of the red probe tip. This close-up shows the flat-head screwdriver tip of the red probe, also indicating its secondary function.
7. Mantemento
To ensure the longevity and accuracy of your voltage probador:
- Limpeza: Wipe the tester with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Almacenamento: Garde o probador nun lugar fresco e seco, lonxe da luz solar directa e de temperaturas extremas.
- Inspección: Regularly inspect the probes and cable for any damage or wear. Replace the unit if significant damage is found.
8 Solución de problemas
| Problema | Causa posible | Solución |
|---|---|---|
| No LED indication when testing a known live circuit. |
|
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| Lecturas LED inconsistentes. |
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9. Especificacións
| Característica | Detalle |
|---|---|
| Número de modelo | QL-108 |
| Marca | Qiilu |
| Voltage Alcance | AC/DC 6V - 380V |
| Vol. Operativo mínimotage | 6 voltios |
| Luces indicadoras | 6V, 12V, 24V, 50V, 110V, 220V, 380V, Positive (+), Negative (-) |
| Funcións | Voltage testing, Polarity indication, LED light, Screwdriver |
| Fonte de enerxía | Draws power from circuit under test (no internal battery required) |
| Dimensións (aprox.) | Tester body: 18.5 cm (7.3 in) | Probe length: 12.5 cm (4.9 in) | Cable length: 80 cm (31.5 in) |
| Peso (aprox.) | 65 g |
| País de Orixe | China |
10. Garantía e soporte
For warranty information or technical support, please refer to the documentation provided with your purchase or contact Qiilu customer service through their official channels. Keep your purchase receipt as proof of purchase.