Manual d'usuari del multímetre digital Homely M890G

1. Introducció

Thank you for choosing the Homely M890G Digital Multimeter. This device is a portable, battery-powered digital multimeter designed for measuring AC/DC voltage, AC/DC current, resistance, capacitance, frequency, temperature, diode, and transistor hFE. It features a clear digital display, data hold function, and auto power-off for convenience and efficiency. Please read this manual thoroughly before use to ensure safe and proper operation.

2. Informació de seguretat

WARNING: To avoid electric shock or personal injury, and to avoid damage to the meter or to the equipment under test, observe the following safety rules:

• Assegureu-vos sempre que el mesurador estigui en la funció i el rang correctes abans de fer mesures.
• No apliqueu més del volum nominaltage, tal com està marcat al comptador, entre els terminals o entre qualsevol terminal i terra.
• Tingueu molta precaució quan treballeu amb voltagestà per sobre de 60 V DC o 30 V AC RMS. Tal voltagsuposen un risc de xoc.
• Disconnect the test leads from the circuit before changing functions or ranges.
• No utilitzeu el mesurador si sembla danyat o si l'aïllament dels cables de prova està compromès.
• Remove the test leads from the meter before opening the battery cover or fuse cover.
• Substituïu la bateria tan bon punt aparegui l'indicador de bateria baixa per garantir lectures precises.
• No feu funcionar el mesurador en entorns amb gasos, vapors o pols explosius.

3. Contingut del paquet

Verify that all items listed below are present and undamaged:

• Homely M890G Digital Multimeter
• Cables de prova (un vermell, un negre)
• Sonda de temperatura de termopar tipus K
• Manual d'usuari

Figure 3.1: Contents of the Homely M890G Digital Multimeter package, including the multimeter, red and black test leads, a K-type thermocouple, and the instruction manual.

4. Producte acabatview

The Homely M890G Digital Multimeter features a robust design with a clear LCD display and a rotary switch for function selection.

4.1 Disposició del panell frontal

Figura 4.1: Detall frontal view of the M890G multimeter, highlighting the LCD display, function rotary switch, and input terminals. The display shows '00.0' and test leads are connected.

• Pantalla LCD: Mostra lectures de mesura, unitats i indicadors de funció.
• Interruptor rotatiu: Used to select the desired measurement function (e.g., V~, V=, A~, A=, Ω, °C, Hz, F, Diode, hFE).
• Botons de funció: (e.g., HOLD, RANGE, REL, Hz/DUTY, SELECT) for additional features.
• Preses d'entrada:
  • COM: Common terminal for the black test lead.
  • VΩHz: Entrada per al voltage, resistance, frequency, capacitance, diode, and continuity measurements (red test lead).
  • mA: Entrada per a mil·ligramsampere current measurements (red test lead).
  • 20A MAX: Input for high current measurements up to 20A (red test lead).

4.2 Rear Features

Figura 4.2: Views of the M890G multimeter from the side and rear, illustrating the integrated kickstand for hands-free operation and the battery compartment cover.

• Suport de peu: Allows the meter to stand upright for easier viewing.
• Compartiment de la bateria: Located on the rear, secured by screws, for battery replacement.

5. Configuració

5.1 Instal·lació de la bateria

The M890G multimeter requires a 9V battery (not always included). To install or replace the battery:

1. Assegureu-vos que el multímetre estigui apagat i que els cables de prova estiguin desconnectats.
2. Localitzeu la tapa del compartiment de la bateria a la part posterior del mesurador.
3. Unscrew the retaining screw(s) and carefully remove the cover.
4. Connect a new 9V battery to the battery clip, observing correct polarity.
5. Col·loqueu la bateria al compartiment i torneu a col·locar la tapa, fixant-la amb el(s) cargol(s).

5.2 Connexió dels cables de prova

Connecteu sempre el cable de prova negre al COM Connecteu el cable de prova vermell al connector d'entrada adequat segons el tipus de mesura:

• Per al voltage, Resistance, Capacitance, Frequency, Diode, and Continuity measurements, connect the red lead to the VΩHz jack.
• For current measurements up to 500mA, connect the red lead to the mA jack.
• For current measurements up to 20A, connect the red lead to the 20A MÀX jack.

6. Instruccions de funcionament

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

6.1 Encès/Apagat

Turn the rotary switch from the OFF position to any desired function to power on the meter. To power off, turn the rotary switch back to the OFF position. The meter features an auto power-off function to conserve battery life after a period of inactivity.

6.2 Mesurar DC Voltage (V=)

1. Connecteu el cable de prova negre a COM i el cable de prova vermell a VΩHz.
2. Ajusteu l'interruptor rotatiu al volum de CC desitjattage (V=) range. If the voltage is unknown, start with the highest range and decrease as needed.
3. Connecteu els cables de prova en paral·lel al circuit o component que s'està provant.
4. Llegeix el voltage valor a la pantalla LCD.

6.3 Mesurar AC Voltage (V~)

1. Connecteu el cable de prova negre a COM i el cable de prova vermell a VΩHz.
2. Ajusteu l'interruptor rotatiu al volum de CA desitjattage (V~) range.
3. Connect the test leads in parallel to the AC source or component.
4. Llegeix el voltage valor a la pantalla LCD.

6.4 Mesura de la resistència (Ω)

1. Assegureu-vos que el circuit estigui desenergitzat abans de mesurar la resistència.
2. Connecteu el cable de prova negre a COM i el cable de prova vermell a VΩHz.
3. Set the rotary switch to the desired Resistance (Ω) range.
4. Connect the test leads across the component whose resistance is to be measured.
5. Llegiu el valor de la resistència a la pantalla LCD.

6.5 Measuring DC Current (A=)

CAUTION: Never connect the meter in parallel to a voltage source when measuring current. This can blow the fuse or damage the meter.

1. Desenergitzar el circuit.
2. Connecteu el cable de prova negre a COMConnecteu el cable de prova vermell a mA for currents up to 500mA, or to 20A MÀX for currents up to 20A.
3. Set the rotary switch to the appropriate DC Current (A=) range.
4. Open the circuit where the current is to be measured and connect the meter in series with the load.
5. Re-energize the circuit and read the current value on the LCD display.

6.6 Measuring Temperature (°C)

1. Connect the K-type thermocouple to the appropriate input jacks (usually VΩHz i COM, observing polarity if indicated).
2. Set the rotary switch to the Temperature (°C) function.
3. Col·loqueu la punta del termopar sobre o a prop de l'objecte la temperatura del qual es vol mesurar.
4. Llegiu el valor de la temperatura a la pantalla LCD.

6.7 Altres funcions

• Prova de continuïtat: Set the rotary switch to the continuity symbol. A built-in buzzer will sound if the resistance is below a certain threshold.
• Prova de díode: Set the rotary switch to the diode symbol. Connect the red lead to the anode and black lead to the cathode of the diode. The forward voltagEs mostrarà una gota.
• Transistor hFE Test: Insert the transistor into the hFE socket on the meter, ensuring correct Emitter, Base, Collector (EBC) orientation for NPN or PNP types. Set the rotary switch to hFE.
• Capacitat (F): Set the rotary switch to the capacitance range. Connect the leads across the capacitor (ensure it is discharged first).
• Freqüència (Hz): Set the rotary switch to the frequency range. Connect the leads to the signal source.

7. Manteniment

7.1 Neteja

Netegeu el comptador amb anuncisamp drap i detergent suau. No utilitzeu abrasius ni dissolvents. Mantingueu els terminals d'entrada lliures de brutícia i humitat.

7.2 Substitució de la bateria

When the low battery indicator appears on the display, replace the 9V battery as described in Section 5.1. Failure to do so may result in inaccurate readings.

7.3 Canvi de fusibles

If the meter fails to measure current, the fuse may be blown. Refer to the specifications for the correct fuse type. To replace the fuse:

1. Ensure the meter is off and all test leads are disconnected.
2. Open the battery compartment cover (and potentially an additional fuse cover, depending on the model).
3. Carefully remove the old fuse and replace it with a new one of the identical type and rating.
4. Securely close all covers.

8. Solució De Problemes

9. Especificacions

10. Garantia i Suport

For warranty information or technical support regarding your Homely M890G Digital Multimeter, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your purchase receipt as proof of purchase.