Manual de instrucións do multímetro dixital Sealey MM20HV

1. Introdución

This manual provides detailed instructions for the safe and effective use of your Sealey MM20HV Digital Multimeter. The MM20HV is a heavy-duty, general-purpose multimeter designed for various electrical measurements, featuring a clear LCD display, data hold function, temperature probe, and diode test facility. It is housed in a rugged rubber boot with an integral stand for durability and convenience.

Lea este manual detidamente antes de operar o dispositivo e gárdeo para futuras consultas.

2. Información de seguridade

Always observe basic safety precautions when using electrical testing equipment to reduce the risk of fire, electric shock, and personal injury.

• Ler as instrucións: Lea todas as instrucións de funcionamento e as advertencias de seguridade antes do uso.
• Inspeccionar o dispositivo: Before each use, inspect the multimeter and test leads for any damage. Do not use if damaged.
• Proper Range: Always select the correct function and range for the measurement.
• Voltage Límites: Do not exceed the maximum input limits specified for each range.
• Live Circuits: Never measure resistance, continuity, or diode on a live circuit. Ensure power is off and circuits are discharged.
• Illamento: Manteña os dedos detrás das barreiras da sonda durante as medicións.
• Ambiente: Do not use the multimeter in wet conditions or in the presence of explosive gases or fumes.
• Servizo: Refer all servicing to qualified personnel. Battery and fuse replacement are the only user-serviceable parts.

3. Que hai na caixa

Ao desembalar, asegúrese de que todos os elementos enumerados a continuación estean presentes e non estean danados:

• Sealey MM20HV Digital Multimeter
• Cables de proba (vermello e negro)
• Termopar (sonda de temperatura)
• Manual de usuario (este documento)

Figura 1: Sealey MM20HV Digital Multimeter shown with included test leads and thermocouple.

4. Configuración

4.1. Instalación da batería

The Sealey MM20HV requires two AAA batteries for operation.

1. Localiza a tapa do compartimento da batería na parte traseira do multímetro.
2. Use un destornillador para retirar o parafuso que fixa a tapa.
3. Insira dúas pilas AAA, respectando a polaridade correcta (+ e -) tal como se indica no interior do compartimento.
4. Coloque a tapa do compartimento da batería e fíxaa co parafuso.

4.2. Conexión dos cables de proba

A conexión correcta dos cables de proba é esencial para obter medicións precisas e seguras.

• Insira o cable de proba negro na toma "COM" (común).
• Para a maioría dos volumestage, resistance, and continuity measurements, insert the red test lead into the "VΩmA" jack.
• For high current (up to 10A DC) measurements, insert the red test lead into the "10A DC" jack. Ensure the function dial is set to the appropriate current range.

Figura 2: Multimeter with black lead in COM and red lead in VΩmA jack.

5. Instrucións de funcionamento

The Sealey MM20HV offers 8 functions for various electrical measurements.

5.1. Acendido/apagado

Rotate the central function dial from the "OFF" position to any desired measurement function to turn the multimeter on. To turn off, rotate the dial back to "OFF".

5.2. Medición de CC Voltage (V=)

1. Insert the black lead into the "COM" jack and the red lead into the "VΩmA" jack.
2. Set the function dial to the desired DC Voltagrango de e (por exemplo, 200 mV, 2 V, 20 V, 200 V, 600 V). Se o volumetage is unknown, start with the highest range and decrease as necessary.
3. Conecte as sondas de proba ao compoñente ou circuíto que se vai medir.
4. Le o voltago valor da pantalla LCD.

5.3. Medición AC Voltage (V~)

1. Insert the black lead into the "COM" jack and the red lead into the "VΩmA" jack.
2. Set the function dial to the desired AC Voltagrango e (por exemplo, 200 V, 600 V).
3. Conecte as sondas de proba a través da tensión de CAtage fonte.
4. Le o voltago valor da pantalla LCD.

5.4. Measuring DC Current (A=)

Atención: Never connect the multimeter in parallel with a voltage source when measuring current. Always connect in series with the load.

1. Insert the black lead into the "COM" jack.
2. For currents up to 200mA, insert the red lead into the "VΩmA" jack. For currents up to 10A, insert the red lead into the "10A DC" jack.
3. Set the function dial to the appropriate DC Current range (e.g., 2mA, 20mA, 200mA, 10A).
4. Abre o circuíto onde se vai medir a corrente e conecta o multímetro en serie.
5. Le o valor actual na pantalla LCD.

5.5. Medición da resistencia (Ω)

Aviso: Asegúrese de que o circuíto estea desenergizado e de que todos os condensadores estean descargados antes de medir a resistencia.

1. Insert the black lead into the "COM" jack and the red lead into the "VΩmA" jack.
2. Set the function dial to the desired Resistance range (e.g., 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ).
3. Conecte as puntas de proba ao compoñente cuxa resistencia se vai medir.
4. Lea o valor da resistencia na pantalla LCD.

5.6. Proba de continuidade audible

This function allows for quick checks of circuit continuity with an audible tone.

1. Insert the black lead into the "COM" jack and the red lead into the "VΩmA" jack.
2. Set the function dial to the continuity symbol (often shared with diode test).
3. Conecte as sondas de proba a través do circuíto ou compoñente.
4. An audible tone indicates continuity (low resistance). The display will show the resistance value.

5.7. Diode/Transistor Verification

This function allows for testing diodes and transistors.

1. Insert the black lead into the "COM" jack and the red lead into the "VΩmA" jack.
2. Set the function dial to the diode symbol.
3. For diode testing, connect the red probe to the anode and the black probe to the cathode. The display will show the forward voltage drop. Reverse the probes; the display should show "OL" (Open Loop) for a good diode.
4. For transistor (hFE) testing, insert the transistor leads into the appropriate NPN or PNP sockets on the multimeter. The display will show the hFE value.

5.8. Measuring Temperature (°C)

The multimeter includes a thermocouple for temperature measurements.

1. Remove the test leads from the input jacks.
2. Insert the thermocouple plug into the "VΩmA" and "COM" jacks, observing polarity if indicated.
3. Set the function dial to the "°C" range.
4. Coloque a punta do termopar sobre ou preto do obxecto cuxa temperatura se vai medir.
5. Read the temperature value in Celsius on the LCD display.

5.9. Función de retención de datos

Press the "HOLD" button (typically a green button on the front panel) to freeze the current reading on the display. Press it again to release the hold and resume live readings.

6. Mantemento

6.1. Limpeza

Limpar o caso co anuncioamp un pano e un deterxente suave. Non empregue abrasivos nin disolventes. Asegúrese de que o dispositivo estea apagado e desconectado de calquera circuíto antes de limpalo.

6.2. Substitución da batería

When the battery indicator appears on the display, replace the batteries as described in Section 4.1. Always use fresh AAA batteries.

6.3. Substitución de fusibles

If the current measurement function stops working, the fuse may need replacement.

1. Ensure the multimeter is turned off and all test leads are disconnected.
2. Remove the battery compartment cover and batteries.
3. Locate the fuse(s) inside the compartment. The MM20HV typically uses a 200mA/250V fast-blow fuse for the mA range and a 10A/250V fast-blow fuse for the 10A range.
4. Carefully remove the old fuse and replace it with a new fuse of the exact same type and rating.
5. Replace the batteries and battery compartment cover.

Importante: Never use a fuse with a different rating or bypass a fuse. This can damage the multimeter and pose a serious safety hazard.

7 Solución de problemas

8. Especificacións

The following table outlines the technical specifications for the Sealey MM20HV Digital Multimeter.

Nota: as especificacións están suxeitas a cambios sen previo aviso.

9. Garantía e soporte

For information regarding warranty coverage, technical support, or service, please refer to the warranty card included with your product or contact Sealey customer service directly. Contact details are typically available on the manufacturer's official websitio.