Manual de instruções do multímetro digital mini Extech EX310 com detector NCV

1. Introdução

The Extech EX310 is a compact, manual-ranging digital multimeter designed for a variety of electrical measurements. It features an extra-large 2000-count LCD and a built-in Non-Contact AC Voltage Detector (NCV) for enhanced safety. This device is capable of measuring AC/DC Voltage, AC/DC Current, Resistance, Diode, and Continuity, and includes a battery test function for 1.5V and 9V batteries. Its robust design, including a protective rubber holster and tilt stand, makes it suitable for field use.

2. Informações de segurança

Always adhere to safety precautions when using any electrical testing equipment. Failure to do so may result in injury or damage to the meter or equipment under test.

• The Extech EX310 is UL listed with a CAT III – 600 Volt safety rating.
• Não aplique mais do que o volume nominaltage, as marked on the meter, between terminals or between any terminal and ground.
• Always inspect test leads for damage before use. Replace if insulation is compromised.
• Tenha extrema cautela ao trabalhar com circuitos energizados.
• Use o Vol. sem contatotage (NCV) detector as a preliminary check for live AC voltage, but always verify with direct contact measurements when possible.
• Ensure the function switch is set to the correct range before making measurements.

3. Recursos do Produto

• 9-Function Manual-Ranging DMM: Mede volume CA/CCtage, AC/DC current (up to 10 A), resistance, diode, continuity, plus 1.5 V/9 V battery tests.
• Vol sem contatotage (NCV) Detector: Built-in NCV with red LED and audible beeper alerts to the presence of live AC (100-600 VAC) without probes.
• Extra-Large 2000-Count Display: Clear, easy-to-read 1-inch digits on a high-count LCD ensure readability.
• Rugged, Portable Design: Compact meter (5.7 × 2.9 × 1.6 in, 9 oz) with protective rubber holster, tilt stand, and low-battery indicator.
• Reliable Safety & Accuracy: 0.5% basic accuracy. Designed to UL/CAT II-1000 V & CAT III-600 V safety standards.

4. Conteúdo da embalagem

The Extech EX310 package includes the following items:

• Extech EX310 Mini Digital Multimeter
• Cabos de teste
• Bateria de 9 volts
• Suporte Inclinado

5. Produto acabadoview (Controls and Display)

Familiarize yourself with the components of your EX310 multimeter:

Imagem: Frente view of the Extech EX310 Mini Digital Multimeter, showing the large LCD display, function dial, NCV button, and input jacks.

Image: Close-up of the Extech EX310's function dial, illustrating the various measurement ranges and functions such as voltage, current, resistance, diode, continuity, and battery test.

• Tela LCD: Exibe leituras de medição, unidades e indicadores de função.
• Interruptor de função: Rotary dial to select the desired measurement function and range.
• Botão NCV: Ativa o volume sem contatotage detection feature.
• Jacks de entrada: Terminals for connecting test leads (COM, VΩmA, 10A).

6. Configuração

6.1. Instalação da bateria

1. Certifique-se de que o multímetro esteja desligado.
2. Localize a tampa do compartimento da bateria na parte traseira do medidor.
3. Desaperte o(s) parafuso(s) de fixação e remova a tampa.
4. Insira uma nova bateria de 9V, observando a polaridade correta.
5. Replace the cover and secure with the screw(s).

A low battery indicator will appear on the display when the battery needs replacement.

6.2. Conectando cabos de teste

Conecte os cabos de teste às entradas apropriadas:

• Insira a ponta de prova preta no COM (comum) jack.
• Para a maioria das medições (Voltage, Resistance, Diode, Continuity, mA Current), insert the red test lead into the VΩmA Jack.
• Para medições de alta corrente (até 10 A), insira o cabo de teste vermelho no... 10A Jack.

7. Instruções de operação

Before making any measurement, ensure the test leads are correctly connected and the function switch is set to the desired range.

7.1. AC / DC Voltage Medição

1. Set the function switch to the desired ACV (~) or DCV (---) range (e.g., 200V, 600V).
2. Connect the red test lead to the VΩmA jack and the black test lead to the COM jack.
3. Toque as pontas de prova nos pontos do circuito onde há tensão.tage deve ser medido.
4. Leia o vol.tage valor no LCD.

7.2. Medição de corrente CA/CC

Cuidado: Never attempt to measure current on a circuit with voltage present across the current terminals. This can blow the fuse or damage the meter.

1. Desligue a energia do circuito.
2. Set the function switch to the desired ACA (~) or DCA (---) range (e.g., 200mA, 10A).
3. Connect the red test lead to the appropriate current jack (VΩmA for mA, 10A for 10A) and the black test lead to the COM jack.
4. Abra o circuito onde a corrente deve ser medida e conecte o medidor em série.
5. Aplique energia ao circuito e leia o valor da corrente no LCD.

7.3. Medição de resistência

1. Certifique-se de que o circuito ou componente esteja desenergizado.
2. Set the function switch to the desired Resistance (Ω) range (e.g., 200Ω, 20kΩ).
3. Connect the red test lead to the VΩmA jack and the black test lead to the COM jack.
4. Touch the test probes across the component or circuit to be measured.
5. Leia o valor da resistência no visor LCD.

Image: The Extech EX310 Multimeter displaying a reading while test leads are connected to a circuit board, demonstrating a typical measurement scenario.

7.4. Teste de diodo

1. Ensure the component is de-energized.
2. Set the function switch to the Diode (→|) position.
3. Connect the red test lead to the VΩmA jack and the black test lead to the COM jack.
4. Encoste a ponta de prova vermelha no ânodo e a ponta de prova preta no cátodo do diodo.
5. Leia o vol anteriortage drop on the LCD. Reverse the probes to check for an open circuit (OL).

7.5. Teste de Continuidade

1. Certifique-se de que o circuito ou componente esteja desenergizado.
2. Set the function switch to the Continuity (→))) position.
3. Connect the red test lead to the VΩmA jack and the black test lead to the COM jack.
4. Touch the test probes across the circuit or component.
5. An audible tone will sound if continuity exists (resistance below approximately 30Ω).

Imagem: Um close-up view of the Extech EX310 Multimeter with its test leads connected to an internal electronic circuit, demonstrating precise measurement capabilities.

7.6. Volume sem contatotage (NCV) Detecção

1. Coloque o interruptor de função em qualquer posição.
2. Press and hold the NCV button.
3. Move the top of the meter (where the NCV sensor is located) close to the suspected AC voltage source (e.g., wire, outlet).
4. A red LED will illuminate and an audible beeper will sound, increasing in intensity as the meter gets closer to the live AC voltage.

Image: A hand holding the Extech EX310 Multimeter near an electrical wall outlet, demonstrating the use of the Non-Contact Voltage (NCV) detection feature to identify live circuits.

7.7. Battery Test (1.5V/9V)

1. Set the function switch to the 1.5V BAT or 9V BAT position.
2. Connect the red test lead to the VΩmA jack and the black test lead to the COM jack.
3. Touch the red probe to the positive terminal and the black probe to the negative terminal of the battery.
4. Leia o volume da bateriatage no LCD.

8. Manutenção

8.1. Substituição da bateria

Refer to Section 6.1 for detailed instructions on replacing the 9V battery when the low battery indicator appears.

8.2. Substituição de fusíveis

If the current measurement functions cease to operate, the internal fuse(s) may need replacement. The fuses are typically located beneath the battery compartment. Refer to the full product manual for specific fuse ratings and replacement procedures. Always replace with fuses of the identical type and rating.

8.3. Limpeza

Limpe periodicamente a caixa com um adamp Limpe com pano e detergente neutro. Não utilize abrasivos ou solventes. Certifique-se de que o medidor esteja completamente seco antes de usar.

9. Solução De Problemas

• Nenhuma exibição: Check the 9V battery. Ensure it is correctly installed and has sufficient charge.
• Leituras incorretas: Verify that the function switch is set to the correct measurement type and range. Ensure test leads are properly connected and making good contact with the circuit.
• Medição atual não está funcionando: Check the internal fuse(s). Refer to the Maintenance section for fuse replacement.
• NCV não detecta: Ensure the NCV button is pressed and held. Confirm the presence of AC voltage (100-600 VAC) in the area being tested.

10. Especificações

Image: Diagram illustrating the physical dimensions of the Extech EX310 Multimeter, showing a length of 6.0 inches (15 cm).

11. Informações de garantia

The Extech EX310 Mini Digital Multimeter is covered by a Garantia de 1 anos para peças e mão de obra from the date of purchase. Please retain your proof of purchase for warranty claims. This warranty covers manufacturing defects and workmanship under normal use.

12. Suporte ao cliente

For technical assistance, troubleshooting beyond this manual, or warranty service, please contact Extech customer support. Refer to the official Extech webPara obter as informações de contato mais recentes, consulte o site ou a embalagem do produto.