Uni-T UT18D Rango automático Voltage Probador

1. Introducción

The Uni-T UT18D is a versatile automatic range voltage tester designed for measuring AC and DC voltage, including three-phase AC current. It features three-phase AC power indicator phase, RCD testing, single-pole measurement (to identify live/neutral lines), self-check, and battery-free detection capabilities. This device is suitable for professional electricians and DIY enthusiasts for various electrical testing needs.

Figure 1: Uni-T UT18D Voltage Tester with highlighted features.

2. Información de seguridad

Always adhere to local and national safety regulations when working with electrical systems. This device is rated CAT III 690V and CAT IV 600V, and has an IP65 waterproof rating, ensuring safety under specified conditions. However, proper precautions must always be taken.

• Suponga siempre que los circuitos están activos hasta que se demuestre lo contrario.
• Wear appropriate Personal Protective Equipment (PPE), such as insulated gloves and safety glasses.
• No utilice el dispositivo si parece dañado o funciona de manera anormal.
• No exceda el volumen máximotage ratings specified for the device.
• Ensure the test probes are securely connected and in good condition before use.

Figure 2: Safety certifications and dimensions of the UT18D.

3. Producto terminadoview

The UT18D features a robust design with clear indicators for ease of use. Key components include:

• Test Pen Caps: Protective covers for the test probes.
• Test Pens L1 & L2: Probes for making electrical contact.
• Flash: Luz integrada para iluminar áreas de trabajo oscuras.
• Volumentage Indication (LED): LED bar graph for quick voltage level reference.
• Pantalla LCD: Large screen for precise voltage readings and other information.
• Botón de prueba RCD: Initiates the Residual Current Device test.
• Flashlight/Self-Inspection Button: Activates the flashlight and performs self-inspection.
• Hold Mode/Backlight Button: Freezes the display reading; long press activates backlight.
• Tapa de la batería: Punto de acceso para el reemplazo de la batería.

Figure 3: Labeled components of the UT18D.

4. Configuración

4.1 Instalación de la batería

The UT18D requires 2 AAA batteries for operation. These batteries are typically not included with the device.

1. Localice la tapa de la batería en la parte posterior del dispositivo.
2. Utilice un destornillador para abrir la tapa de la batería.
3. Inserte 2 pilas AAA, asegurándose de la polaridad correcta (+/-).
4. Cierre de forma segura la tapa de la batería.

The device features an automatic power-off function to conserve battery life and can perform basic voltage detection without batteries, though full functionality like continuity testing requires them.

5. Instrucciones de funcionamiento

5.1 Vol AC/DCtagMedición electrónica

The UT18D automatically detects AC/DC voltage within the 12V to 690V range.

1. Remove the protective caps from the test probes.
2. Conecte las sondas de prueba al circuito o componente que desee medir.
3. El voltage level will be displayed on the LCD, and the corresponding LEDs will illuminate.

5.2 Prueba de continuidad

The continuity test function requires batteries to be inserted and in good condition. Ensure the circuit under test is not live.

1. Asegúrese de que el circuito esté desenergizado.
2. Conecte las sondas de prueba a través del circuito o componente.
3. A buzzer will sound, and an LED will illuminate to confirm continuity.

Figura 4: Realización de una prueba de continuidad.

5.3 Prueba de RCD (dispositivo de corriente residual)

The RCD test function detects leakage protective switches. This function should NOT be used in 110V electrical systems.

1. Connect the test probes to the circuit where an RCD is present.
2. Press the RCD test button.
3. Observe if the RCD trips, indicating proper function.

Figure 5: Performing an RCD test.

5.4 Phase Sequence Test

Esta unidad puede determinar la rotación de fases dentro de un suministro trifásico.

1. Connect the test probes to the three-phase lines as indicated by the device or diagram.
2. The display will indicate the phase rotation (e.g., R for clockwise, L for counter-clockwise).

Figure 6: Phase Rotation Test procedure.

5.5 Single-Pole Measurement

The single-pole measurement allows identification of live or neutral lines using a single probe.

1. Touch one test probe to the conductor.
2. The device will indicate if the line is live (phase) or neutral.

5.6 Linterna y luz de fondo

Activate the built-in flashlight by pressing the dedicated button to illuminate dark work areas. A long press of the Hold button may activate the LCD backlight for improved visibility in low light conditions.

Figure 7: Flashlight feature in use.

6. Mantenimiento

To ensure the longevity and accuracy of your UT18D voltage tester, follow these maintenance guidelines:

• Limpieza: Limpie el dispositivo con un paño seco y suave. No utilice limpiadores abrasivos ni disolventes.
• Almacenamiento: Guarde el dispositivo en un lugar fresco y seco, alejado de la luz solar directa y de temperaturas extremas.
• Reemplazo de batería: Replace batteries promptly when the low battery indicator appears on the LCD. Remove batteries if the device will not be used for an extended period.
• Resistencia al agua: The UT18D has an IP65 waterproof rating, providing protection against dust and water jets. While it is resistant, avoid submerging the device or exposing it to high-pressure water.

Figura 8: Característica de impermeabilidad IP65.

7. Solución de problemas

If you encounter issues with your UT18D, consider the following:

• El dispositivo no se enciende: Compruebe que las baterías estén correctamente instaladas y tengan suficiente carga. Reemplácelas si es necesario.
• Lecturas inconsistentes: Ensure proper contact between the test probes and the circuit. Verify that the circuit conditions are within the device's specified operating range.
• Sin indicación de continuidad: Confirm that batteries are installed and in good condition. Ensure the circuit is de-energized before testing continuity.

For persistent issues, refer to the detailed specifications or contact customer support.

8. Especificaciones

9. Garantía y soporte

For warranty information, technical support, or service inquiries, please contact Uni-T customer service directly or visit the official Uni-T webSitio. Conserve su recibo de compra como comprobante para reclamaciones de garantía.